SELIGMAN COMMON STOCK FUND INC
485BPOS, 1997-04-29
Previous: BRIDGES INVESTMENT FUND INC, N-30B-2, 1997-04-29
Next: CAMBEX CORP, 10-K/A, 1997-04-29



<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234


                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
- --------------------------------------------------------------------------------

                                 FORM N-1A

     REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933            [X]
                                                               
       Pre-Effective Amendment No. __                                   [_]
                                                               
                                                                   
       Post-Effective Amendment No.  75                                 [X]     
                                     --                          
     REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940    [X]

    
       Amendment No.  23                                                [X]     
                      --                                         

- --------------------------------------------------------------------------------

                       SELIGMAN COMMON STOCK FUND, INC.
              (Exact name of registrant as specified in charter)
- --------------------------------------------------------------------------------

                  100 PARK AVENUE, NEW YORK, NEW YORK  10017
                   (Address of principal executive offices)

   Registrant's Telephone Number:  212-850-1864 or Toll Free:  800-221-2450
- --------------------------------------------------------------------------------

     THOMAS G. ROSE, Treasurer, 100 Park Avenue, New York, New York 10017
                    (Name and address of agent for service)

- --------------------------------------------------------------------------------


It is proposed that this filing will become effective (check appropriate box):


<TABLE>     
<S>                                                       <C> 
 
[X] immediately upon filing pursuant to paragraph (b)     [_] on (date) pursuant to paragraph (a)(1)
 
[_] on (date) pursuant to paragraph (b)                   [_] 75 days after filing pursuant to paragraph (a)(2)

[_] 60 days after filing pursuant to paragraph (a)(1)     [_] on (date) pursuant to paragraph (a)(2) of rule 485.
</TABLE>      

If appropriate, check the following box:

[_] This post-effective amendment designates a new effective date for a
    previously filed post-effective amendment.
    
Registrant has registered an indefinite amount of securities under the
Securities Act of 1933 pursuant to Rule 24f-2(a)(1) and a Rule 24f-2 Notice for
Registrant's most recent fiscal year was filed with the Commission on December
20, 1996.      
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234

                        SELIGMAN COMMON STOCK FUND, INC.
                        FORM N-1A CROSS REFERENCE SHEET
                        POST-EFFECTIVE AMENDMENT NO. 75       
                            Pursuant to Rule 481(a)
                            -----------------------
<TABLE>
<CAPTION>
 
Item in Part A of Form N-1A                      Location in Prospectus
- -----------------------------                    ----------------------
<S>                                              <C>  
1. Cover Page                                    Cover Page
                                       
2. Synopsis                                      Summary of Fund Expenses
                                       
3. Condensed Financial Information               Financial Highlights
                                       
4. General Description of Registrant             Cover Page; Organization and Capitalization
                                       
5. Management of the Fund                        Management Services
 
5a. Manager's Discussion of Fund Performance     Management Services

6. Capital Stock and Other Securities            Organization and Capitalization

7. Purchase of Securities Being Offered          Alternative Distribution System; Purchase of
                                                 Shares; Administration, Shareholder Services
                                                 and Distribution Plan

8. Redemption or Repurchase                      Telephone Transactions; Redemption of Shares; Exchange
                                                 Privilege

9. Pending Legal Proceedings  Not applicable
 
<CAPTION> 
Item in Part B of Form N-1A                      Location in Statement of Additional Information
- ---------------------------                      -----------------------------------------------
<S>                                              <C> 
10.    Cover Page                                Cover Page
                                              
11.    Table of Contents                         Table of Contents
                                              
12.    General Information and History           General Information; Organization and Capitalization (Prospectus); Appendix
                                              
13.    Investment Objectives and Policies        Investment Objective, Policies And Risks; Investment Limitations
                                              
14.    Management of the Registrant              Management and Expenses
                                              
15.    Control Persons and Principal             Directors and Officers
       Holders of Securities                  
                                              
16.    Investment Advisory and Other Services    Management and Expenses; Distribution Services
                                              
17.    Brokerage Allocation                      Portfolio Transactions; Administration, Shareholder
                                                 Services and Distribution Plan
                                              
18.    Capital Stock and Other Securities        General Information; Organization and Capitalization (Prospectus)
                                              
19.    Purchase, Redemption and Pricing          Purchase and Redemption of Fund Shares;
       of Securities being Offered               Valuation
                                              
20.    Tax Status                                Federal Income Taxes (Prospectus)
                                              
21.    Underwriter                               Distribution Services
                                              
22.    Calculation of Performance Data           Performance
                                              
23.    Financial Statements                      Financial Statements
</TABLE>

<PAGE>
 
                       SELIGMAN COMMON STOCK FUND, INC.
                                100 Park Avenue
                              New York, NY 10017
                    New York City Telephone: (212) 850-1864
       Toll-Free Telephone: (800) 221-2450 all continental United States
     For Retirement Plan Information--Toll-Free Telephone: (800) 445-1777
                                                                  
                                                               May 1, 1997     
   
  Seligman Common Stock Fund, Inc. (the "Fund") is a mutual fund which invests
to produce favorable, but not the highest, current income and long-term growth
of both income and capital value, without exposing capital to undue risk. In-
vestment advisory and management services are provided to the Fund by J. & W.
Seligman & Co. Incorporated (the "Manager") and, to the extent requested by
the Manager in respect of foreign assets, Seligman Henderson Co. (the
"Subadviser"). The Fund's distributor is Seligman Financial Services, Inc., an
affiliate of the Manager. For a description of the Fund's investment objective
and policies, including the risk factors associated with an investment in the
Fund, see "Investment Objectives, Policies and Risks." There can be no assur-
ance that the Fund's investment objectives will be achieved.     
   
  The Fund offers three classes of shares. Class A shares are sold subject to
an initial sales load of up to 4.75% and an annual service fee currently
charged at a rate of up to .25% of the average daily net asset value of the
Class A shares. Class A shares purchased in an amount of $1,000,000 or more
are sold without an initial sales load but are subject to a contingent de-
ferred sales load ("CDSL") of 1% on redemptions within eighteen months of pur-
chase. Class B shares are sold without an initial sales load but are subject
to a CDSL, of 5% on redemptions in the first year after purchase of such
shares, declining to 1% in the sixth year and 0% thereafter, an annual distri-
bution fee of .75% and an annual service fee of up to .25% of the average
daily net asset value of the Class B shares. Class B shares will automatically
convert to Class A shares on the last day of the month that precedes the
eighth anniversary of their date of purchase. Class D shares are sold without
an initial sales load but are subject to a CDSL of 1% imposed on redemptions
within one year of purchase, an annual distribution fee of up to .75% and an
annual service fee of up to .25% of the average daily net asset value of the
Class D shares. Any CDSL payable upon redemption of Class B or Class D shares
will be assessed on the lesser of the current net asset value or the original
purchase price of the shares redeemed. No CDSL will be imposed on shares ac-
quired through the reinvestment of dividends or distributions received from
any class of shares. See "Alternative Distribution System." Shares of the Fund
may be purchased through any authorized investment dealer.     
 
  This Prospectus sets forth concisely the information a prospective investor
should know about the Fund before investing. Please read it carefully before
you invest and keep it for future reference. Additional information about the
Fund, including a Statement of Additional Information, has been filed with the
Securities and Exchange Commission. The Statement of Additional Information is
available upon request without charge by calling or writing the Fund at the
telephone numbers or the address set forth above. The Statement of Additional
Information is dated the same date as this Prospectus and is incorporated
herein by reference in its entirety.
 
 SHARES IN  THE FUND  ARE NOT DEPOSITS  OR OBLIGATIONS  OF, OR  GUARANTEED OR
   ENDORSED BY,  ANY BANK,  AND  SHARES ARE  NOT  FEDERALLY INSURED  BY  THE
    FEDERAL DEPOSIT  INSURANCE CORPORATION,  THE FEDERAL RESERVE  BOARD OR
      ANY OTHER AGENCY.
 
 THESE  SECURITIES HAVE NOT  BEEN APPROVED OR  DISAPPROVED BY THE  SECURITIES
   AND EXCHANGE COMMISSION  OR ANY STATE SECURITIES  COMMISSION NOR HAS THE
    SECURITIES AND  EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
      PASSED  UPON THE  ACCURACY  OR ADEQUACY  OF  THIS PROSPECTUS.  ANY
        REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                               TABLE OF CONTENTS
<TABLE>   
<CAPTION>
                                      PAGE
<S>                                   <C>
Summary of Fund Expenses.............   2
Financial Highlights.................   3
Alternative Distribution System......   5
Investment Objectives, Policies and
 Risks...............................   7
Management Services..................   8
Purchase of Shares...................  11
Telephone Transactions...............  17
Redemption of Shares.................  18
</TABLE>    
<TABLE>   
<CAPTION>
                                                                       PAGE
<S>                                                                    <C>
Administration, Shareholder Services and Distribution Plan............  20
Exchange Privilege....................................................  22
Further Information about Transactions in the Fund....................  24
Dividends and Distributions...........................................  24
Federal Income Taxes..................................................  25
Shareholder Information...............................................  26
Advertising the Fund's Performance....................................  28
Organization and Capitalization.......................................  28
</TABLE>    
<PAGE>
 
                           SUMMARY OF FUND EXPENSES
 
<TABLE>   
<CAPTION>
                                   CLASS A          CLASS B         CLASS D
                               ---------------- --------------- ----------------
                                (INITIAL SALES  (DEFERRED SALES (DEFERRED SALES
SHAREHOLDER TRANSACTION              LOAD            LOAD             LOAD
EXPENSES                         ALTERNATIVE)    ALTERNATIVE)     ALTERNATIVE)
<S>                            <C>              <C>             <C>
 Maximum Sales Load Imposed
  on Purchases (as a
  percentage of offering
  price).....................       4.75%            None             None
 Sales Load on Reinvested
  Dividends..................        None            None             None
 Deferred Sales Load (as a
  percentage of original
  purchase price or            
  redemption proceeds,         
  whichever is lower)........       None;       5% in 1st year  1% in first year
                                 except 1% in   4% in 2nd year  None thereafter
                               first 18 months   3% in 3rd and                 
                               if initial sales    4th years                   
                               load was waived  2% in 5th year                 
                                in full due to  1% in 6th year                 
                               size of purchase None thereafter                 
 Redemption Fees.............        None            None             None
 Exchange Fees...............        None            None             None
ANNUAL FUND OPERATING
 EXPENSES FOR 1996                 CLASS A          CLASS B         CLASS D
                               ---------------- --------------- ----------------
(as a percentage of average
 net assets)
 Management Fees.............        .65%             .65%            .65%
 12b-1 Fees..................        .24%            1.00%*          1.00%*
 Other Expenses..............        .26%             .26%            .26%
                                    -----            ----            -----
 Total Fund Operating
  Expenses...................       1.15%            1.91%           1.91%
                                    =====            ====            =====
</TABLE>    
   
  The purpose of this table is to assist investors in understanding the vari-
ous costs and expenses which shareholders of the Fund bear directly or indi-
rectly. The sales load on Class A shares is a one-time charge paid at the time
of purchase of shares. Reductions in initial sales loads are available in cer-
tain circumstances. Class A shares are not subject to an initial sales load
for purchases of $1,000,000 or more; however, such shares are subject to a
CDSL, a one-time charge, only if the shares are redeemed within eighteen
months of purchase. The CDSLs on Class B and Class D shares are one-time
charges paid only if shares are redeemed within six years or one year of pur-
chase, respectively. "Other Expenses" for Class B shares are estimated based
on expenses incurred during 1996. For more information concerning reductions
in sales loads and for a more complete description of the various costs and
expenses, see "Purchase of Shares," "Redemption of Shares" and "Management
Services" herein. The Fund's Administration, Shareholder Services and Distri-
bution Plan to which the caption "12b-1 Fees" relates, is discussed under "Ad-
ministration, Shareholder Services and Distribution Plan" herein.     
<TABLE>   
<CAPTION>
                                                 1 YEAR  3 YEARS 5 YEARS 10 YEARS
EXAMPLE                                          ------  ------- ------- --------
<S>                                              <C>     <C>     <C>     <C>
An investor would pay the following expenses on
 a $1,000 investment, assuming (1) a 5% annual
 return and
 (2) redemption at the end of each time
 period................................ Class A   $59      $82    $108     $181
Class B+                                          $69      $90    $123     $203
Class D                                           $29++    $60    $103     $223
</TABLE>    
 
THE EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE EX-
PENSES. ACTUAL EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN AND THE 5% AN-
NUAL RETURN USED IN THIS EXAMPLE IS A HYPOTHETICAL RATE.
          
* Includes an annual distribution fee of .75% and an annual service fee of
  .25%. Pursuant to the Rules of the National Association of Securities Deal-
  ers, Inc., the aggregate deferred sales loads and annual distribution fees
  on Class B and Class D shares of the Fund may not exceed 6.25% of total
  gross sales, subject to certain exclusions. The maximum sales charge rule is
  applied separately to each class. The 6.25% limitation is imposed on the
  Fund rather than on a per shareholder basis. Therefore, a long-term Class B
  or Class D shareholder of the Fund may pay more in total sales loads (in-
  cluding distribution fees) than the economic equivalent of 6.25% of such
  shareholder's investment in such shares.     
   
 + Assuming (1) a 5% annual return and (2) no redemption at the end of the pe-
   riod, the expenses on a $1,000 investment would be $19 for 1 year, $60 for
   3 years and $103 for 5 years. The expenses shown for the ten-year period
   reflect the conversion of Class B shares to Class A after 8 years.     
   
++ Assuming (1) a 5% annual return and (2) no redemption at the end of one
 year, the expenses on a $1,000 investment would be $19.     
 
                                       2
<PAGE>
 
                             FINANCIAL HIGHLIGHTS
   
  The financial highlights for the Fund's Class A, Class B and Class D shares
for the periods presented have been audited by Deloitte & Touche LLP, indepen-
dent auditors. This information, which is derived from the financial and ac-
counting records of the Fund, should be read in conjunction with the financial
statements and notes contained in the Fund's 1996 Annual Report, which is in-
corporated by reference in the Fund's Statement of Additional Information,
copies of which may be obtained free of charge by calling or writing the Fund
at the telephone numbers or address provided on the cover page of this Pro-
spectus.     
   
  The per share operating performance data is designed to allow investors to
trace the operating performance, on a per share basis, from each Class's be-
ginning net asset value to its ending net asset value so that they may under-
stand what effect the individual items have on their investment, assuming it
was held throughout the period. Generally, the per share amounts are derived
by converting the actual dollar amounts incurred for each item, as disclosed
in the financial statements, to their equivalent per share amount.     
   
  The total return based on net asset value measures each Class's performance
assuming investors purchased Fund shares at net asset value as of the begin-
ning of the period, invested dividends and capital gains paid at net asset
value, and then sold their shares at the net asset value per share on the last
day of the period. The total return computations do not reflect any sales
loads investors may incur in purchasing or selling shares of the Fund. The to-
tal returns for periods of less than one year are not annualized.     
   
  Average commission rate paid represents the average commissions paid by the
Fund to purchase or sell securities. It is determined by dividing the total
commission dollars paid by the number of shares purchased and sold during the
period for which commissions were paid.     
<TABLE>   
<CAPTION>
                                                                   CLASS A
                          ----------------------------------------------------------------------------------------------------
                                                           YEAR ENDED DECEMBER 31,
                          ----------------------------------------------------------------------------------------------------
                           1996O     1995O     1994O       1993      1992      1991      1990       1989      1988      1987
                          --------  --------  --------   --------  --------  --------  --------   --------  --------  --------
<S>                       <C>       <C>       <C>        <C>       <C>       <C>       <C>        <C>       <C>       <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value,
 beginning of year......    $14.19    $12.12    $13.47     $12.79    $12.54    $10.60    $12.24     $11.30    $11.06    $13.03
                          --------  --------  --------   --------  --------  --------  --------   --------  --------  --------
Net investment income...       .35       .36       .38        .39       .39       .40       .38        .44       .43       .44
Net realized and
 unrealized investment
 gain (loss)............      1.81      3.00      (.64)      1.49       .95      2.72      (.86)      2.52       .68      (.36)
Net realized and
 unrealized in on
 foreign currency
 transaction............        --       .01        --         --        --        --        --         --        --        --
                          --------  --------  --------   --------  --------  --------  --------   --------  --------  --------
Increase (decrease) from
 investment operations..      2.16      3.37      (.26)      1.88      1.34      3.12      (.48)      2.96      1.11       .08
Dividends paid..........      (.34)     (.36)     (.37)      (.38)     (.39)     (.40)     (.41)      (.43)     (.42)     (.45)
Distributions from net
 gain realized..........     (1.12)     (.94)     (.72)      (.82)     (.70)     (.78)     (.75)     (1.59)     (.45)    (1.60)*
                          --------  --------  --------   --------  --------  --------  --------   --------  --------  --------
Net increase (decrease)
 in net asset value.....      0.70      2.07     (1.35)       .68       .25      1.94     (1.64)       .94       .24     (1.97)
                          --------  --------  --------   --------  --------  --------  --------   --------  --------  --------
Net asset value, end of
 year...................    $14.89    $14.19    $12.12     $13.47    $12.79    $12.54    $10.60     $12.24    $11.30    $11.06
                          ========  ========  ========   ========  ========  ========  ========   ========  ========  ========
TOTAL RETURN BASED ON
 NET ASSET VALUE:            15.44%    28.17%    (1.89)%    14.86%    10.86%    29.93%    (3.89)%    26.77%    10.08%      .21%
RATIOS/SUPPLEMENTAL
 DATA:
Expenses to average net
 assets.................      1.15%      .93%      .85%       .87%      .75%      .72%      .66%       .65%      .69%      .60%
Net investment income to
 average net assets.....      2.36%     2.56%     2.93%      2.86%     3.00%     3.24%     3.22%      3.51%     3.70%     3.09%
Portfolio turnover......     56.10%    46.08%    57.17%     54.37%    46.78%    47.60%    45.22%     56.27%    52.58%    61.37%
Average commission rate
 paid...................  $  .0554
Net assets, end of year
 (000s omitted).........  $656,260  $614,400  $510,956   $553,222  $514,069  $494,858  $422,099   $495,029  $487,179  $521,407
</TABLE>    
- -------
   
 oPer share amounts for the years ended December 31, 1996, 1995 and 1994 are
calculated based on average shares outstanding.     
   
 *Includes excess taxable gain distribution over realized corporate gain
charged to paid-in capital of $.01.     
          
  The data provided above reflects historical information and therefore
through April 10, 1991 has not been adjusted to reflect the effect of the in-
creased management fee which was approved by shareholders on April 10, 1991;
through December 31, 1992, does not reflect the effect of the Administration,
Shareholder Services and Distribution Plan which was approved by shareholders
on November 23, 1992 and became effective January 1, 1993; or through December
31, 1995 does not reflect the effect of the increase in the management fee
rate payable by the Fund, which was approved by shareholders on December 12,
1995 and became effective on January 1, 1996.     
 
                                       3
<PAGE>
 
                        
                     FINANCIAL HIGHLIGHTS (continued)     
 
<TABLE>   
<CAPTION>
                              CLASS B                 CLASS D
                             ---------    ------------------------------------
                             4/22/96*     YEAR ENDED DECEMBER 31,     5/3/93*
                                TO        -------------------------      TO
                             12/31/96O    1996O    1995O    1994O     12/31/93
                             ---------    ------  -------  --------   --------
<S>                          <C>          <C>     <C>      <C>        <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning
 of period.................    $14.80     $14.16   $12.07    $13.46    $13.29
                             --------     ------  -------  --------    ------
Net investment income......       .15        .24     0.24       .22       .18
Net realized and unrealized
 investment gain (loss)....      1.20       1.80     3.00      (.66)     1.02
Net realized and unrealized
 gain on foreign currency
 transaction...............        --         --      .01        --        --
                             --------     ------  -------  --------    ------
Increase (decrease) from
 investment operations.....      1.35       2.04     3.25      (.44)     1.20
Dividends paid.............     (0.16)     (0.21)    (.22)     (.23)     (.21)
Distributions from net gain
 realized..................     (1.12)     (1.12)    (.94)     (.72)     (.82)
                             --------     ------  -------  --------    ------
Net increase (decrease) in
 net asset value...........      0.07       0.71     2.09     (1.39)      .17
                             --------     ------  -------  --------    ------
Net asset value, end of
 period....................    $14.87     $14.87   $14.16    $12.07    $13.46
                             ========     ======  =======  ========    ======
TOTAL RETURN BASED ON NET
 ASSET VALUE:                    9.21%     14.58%   27.17%    (3.24)%    9.09%
RATIOS/SUPPLEMENTAL DATA:
Expenses to average net
 assets....................      1.92%+     1.91%    1.72%     1.96%     2.02%+
Net investment income to
 average net assets........      1.55%+     1.61%    1.80%     1.68%     1.83%+
Portfolio turnover.........     56.10%++   56.10%   46.08%    57.17%    54.37%+++
Average commission rate
 paid......................    $.0554++   $.0554
Net assets, end of period
 (000s omitted)............    $6,451     63,938  $46,564   $14,416    $5,667
</TABLE>    
- -------
   
  *Commencement of offering of shares.     
   
  oPer share amounts for the periods ended December 31, 1996, 1995 and 1994,
are calculated based on average shares outstanding.     
   
  +Annualized.     
   
 ++For the year ended December 31, 1996.     
   
+++For the year ended December 31, 1993.     
   
       
  The data provided above reflects historical information and therefore through
December 31, 1995 does not reflect the effect of the increase in the management
fee rate payable by the Fund, which was approved by shareholders on December
12, 1995 and became effective on January 1, 1996.     
 
                                       4
<PAGE>
 
ALTERNATIVE DISTRIBUTION SYSTEM
 
  The Fund offers three classes of shares. Class A shares are sold to invest-
ors who have concluded that they would prefer to pay an initial sales load and
have the benefit of lower continuing fees. Class B shares are sold to invest-
ors choosing to pay no initial sales sold, a higher distribution fee and a
CDSL with respect to redemptions within six years of purchase and who desire
shares to convert automatically to Class A shares after eight years. Class D
shares are sold to investors choosing to pay no initial sales load, a higher
distribution fee and, with respect to redemptions within one year of purchase,
a CDSL. The Alternative Distribution System allows investors to choose the
method of purchasing shares that is most beneficial in light of the amount of
the purchase, the length of time the shares are expected to be held and other
relevant circumstances. Investors should determine whether under their partic-
ular circumstances it is more advantageous to incur an initial sales load and
be subject to lower ongoing fees, as discussed below, or to have the entire
initial purchase price invested in the Fund with the investment thereafter be-
ing subject to higher ongoing fees and either a CDSL for a six-year period
with automatic conversion to Class A shares after eight years or a CDSL for a
one-year period with no automatic conversion to Class A shares.
          
  Investors who expect to maintain their investment for an extended period of
time might choose to purchase Class A shares because over time the accumulated
continuing distribution fees of Class B and Class D shares may exceed the ini-
tial sales load and lower distribution fee of Class A shares. This considera-
tion must be weighed against the fact the amount invested in the Fund will be
reduced by the initial sales load on Class A shares deducted at the time of
purchase. Furthermore, the higher distribution fees on Class B and Class D
shares will be offset to the extent any return is realized on the additional
funds initially invested therein that would have been equal to the amount of
the initial sales load on Class A shares.     
   
  Investors who qualify for reduced initial sales loads, as described under
"Purchase of Shares" be-low, might also choose to purchase Class A shares be-
cause the sales load deducted at the time of purchase would be less or waived
in full. However, investors should consider the effect of the 1% CDSL imposed
on shares on which the initial sales load was waived because the amount of
Class A shares purchased was $1,000,000 or more. In addition, Class B shares
will be converted automatically to Class A shares after a period of approxi-
mately eight years, and thereafter investors will be subject to lower ongoing
fees. Shares purchased through reinvestment of dividends and distributions on
Class B shares also will convert automatically to Class A shares along with
the underlying shares on which they were earned.     
 
  Alternatively, some investors might choose to have all of their funds in-
vested initially in Class B or Class D shares, although remaining subject to a
higher continuing distribution fee and, for a six-year or one-year period, a
CDSL as described below. For example, an investor who does not qualify for re-
duced sales loads would have to hold Class A shares for more than 6.33 years
for the Class B or Class D distribution fee to exceed the initial sales load
plus the distribution fee on Class A shares. This example does not take into
account the time value of money, which further reduces the impact of the Class
B and Class D shares' 1% distribution fee, other expenses charged to each
class, fluctuations in net asset value or the effect of the return on the in-
vestment over this period of time.
   
  Investors should bear in mind that total asset based sales charges (i.e. the
higher continuing distribution fee plus the CDSL) on Class B shares that are
redeemed may exceed the total asset based sales charges that would be payable
on the same amount of Class A or Class D shares, particularly if the Class B
shares are redeemed shortly after purchase or if the investor qualifies for a
reduced sales load on the Class A shares.     
   
  Investors should understand that the purpose and function of the initial
sales loads (and deferred sales load, when applicable) with respect to Class A
    
                                       5
<PAGE>
 
shares is the same as those of the deferred sales loads and higher distribu-
tion fees with respect to Class B and Class D shares in that the sales loads
and distribution fees applicable to each class provide for the financing of
the distribution of the shares of the Fund.
   
  Class B and Class D shares are subject to the same ongoing distribution fees
but Class D shares are subject to a CDSL for a shorter period of time (one
year as opposed to six years) than Class B shares. However, unlike Class D
shares, Class B shares automatically convert to Class A shares after eight
years, which are subject to lower ongoing fees.     
 
  The three classes of shares represent interests in the same portfolio of in-
vestments, have the same rights and are generally identical in all respects
except that each class bears its separate distribution and, potentially, cer-
tain other class expenses and has exclusive voting rights with respect to any
matter to which a separate vote of any class is required by the Investment
Company Act of 1940, as amended (the "1940 Act"), or Maryland law. The net in-
come attributable to each class and dividends payable on the shares of each
class will be reduced by the amount of distribution and other expenses of each
class. Class B and Class D shares bear higher distribution fees, which will
cause the Class B and Class D shares to pay lower dividends than the Class A
shares. The three classes also have separate exchange privileges.
 
  The Directors of the Fund believe that no conflict of interest currently ex-
ists between the Class A, Class B and Class D shares. On an ongoing basis, the
Di-rectors, in the exercise of their fiduciary duties under the 1940 Act and
Maryland law, will seek to ensure that no such conflict arises. For this pur-
pose, the Directors will monitor the Fund for the existence of any material
conflict among the classes and will take such action as is reasonably neces-
sary to eliminate any such conflicts that may develop.
   
  DIFFERENCES BETWEEN CLASSES. The primary differences between Class A, Class
B and Class D shares are their sales load structures and ongoing expenses as
set forth below. The primary differences between Class B and Class D shares
are that Class D shares are subject to a shorter CDSL period and a lower CDSL
rate but Class B shares automatically convert to Class A shares after eight
years, resulting in a reduction in ongoing fees. Investors in Class B shares
should take into account whether they intend to redeem their shares within the
CDSL period and, if not, whether they intend to remain invested until the end
of the conversion period and thereby take advantage of the reduction in ongo-
ing fees resulting from the conversion to Class A shares. Other investors,
however, may elect to purchase Class D shares if they determine that it is ad-
vantageous to have all their assets invested initially and they are uncertain
as to the length of time they intend to hold their assets in the Fund or an-
other mutual fund in the Seligman Group for which the exchange privilege is
available. Although Class D shareholders are subject to a shorter CDSL period
at a lower rate, they forgo the Class B automatic conversion feature, making
their investment subject to higher distribution fees for an indefinite period
of time. Each class has advantages and disadvantages for different investors,
and investors should choose the class that best suits their circumstances and
their objectives.     
 
 
                                       6
<PAGE>
 
<TABLE>   
<CAPTION>
                                   ANNUAL 12B-1
                                       FEES
                                    (AS A % OF
                                     AVERAGE
               INITIAL              DAILY NET                   OTHER
              SALES LOAD             ASSETS)                 INFORMATION
              ----------           ------------              -----------
 <C>          <C>                  <C>                    <S>
 CLASS A      Maximum              Service fee            Initial sales
              initial              of .25%.               load
              sales                                       waived or reduced for
              load of                                     certain purchases.
              4.75% of                                    CDSL of 1% on
              the                                         redemptions within 18
              public                                      months of purchase on
              offering                                    shares on which
              price.                                      initial sales load was
                                                          waived in full due to
                                                          the size of the purchase.
 CLASS B      None                 Service fee            CDSL of:
                                   of .25%                5% in 1st year
                                   Distribution           4% in 2nd year
                                   fee of .75%            3% in 3rd and 4th years
                                   until                  2% in 5th year
                                   conversion*            1% in 6th year
                                                          0% after 6th year.
 CLASS D      None                 Service fee            CDSL of 1% on
                                   of .25%                redemptions within one
                                   Distribution           year of purchase.
                                   fee of up to
                                   .75%.
</TABLE>    
* Conversion occurs at the end of the month which precedes the 8th anniversary
  of the purchase date. If Class B shares of the Fund are exchanged for Class
  B shares of another Seligman Mutual Fund, the conversion period applicable
  to the Class B shares acquired in the exchange will apply, and the holding
  period of the shares exchanged will be tacked onto the holding period of the
  shares acquired.
 
INVESTMENT OBJECTIVES, POLICIES AND RISKS
 
  The Fund is an open-end diversified management investment company, as de-
fined in the 1940 Act, or mutual fund, incorporated in Maryland in 1930.
 
  The Fund strives to produce favorable, but not the highest, current income
and long-term growth of both income and capital value, without exposing capi-
tal to undue risk. Income is thought of in terms of both the dollar amount of
dividends paid and the purchasing power of the income they provide.
 
  The Fund emphasizes careful selection of individual securities suited to its
investment objectives, broad diversification of investment risk and continuing
supervision of securities owned. Assets may be held in cash or invested in all
forms of securities. For many years, common stocks have made up the bulk of
securities owned. However, substantial proportions of assets have been held,
and may be held, in cash and fixed income securities. Investments may be
changed whenever considered advisable and portfolio turnover may vary with
such changes. There can be no assurance that the Fund's investment objectives
will be attained.
 
  LENDING OF PORTFOLIO SECURITIES. The Fund may lend portfolio securities to
brokers or dealers in corporate or government securities, or banks or other
institutional borrowers of securities. The borrower must maintain with the
Fund cash or equivalent collateral equal to at least 100% of the market value
of the securities loaned. During the time portfolio securities are on loan,
the borrower pays the Fund an amount equivalent to any dividends or interest
paid on the securities and the Fund may invest the cash collateral and earn
additional income or may receive an agreed upon amount of interest income from
the borrower.
 
  BORROWING. The Fund may borrow money only from banks and only for temporary
or emergency purposes in an amount not to exceed 15% of the value of its total
assets. The Fund may pledge its assets only to the extent necessary to effect
permitted borrowings on a secured basis.
 
  ILLIQUID SECURITIES. The Fund may invest up to 15% of its net assets in il-
liquid securities, including restricted securities (i.e., securities not read-
ily marketable without registration under the Securities Act of 1933 (the
"1933 Act")) and other securities that are not readily marketable. The Fund
may purchase restricted securities that can be offered and sold to "qualified
institutional buyers" under Rule 144A of the 1993 Act, and the Manager, acting
pursuant to procedures approved by the Fund's Board of Directors, may
determine, when appropriate, that specific Rule 144A securities are liquid and
not subject to the 15% limitation on illiquid securities. Should this determi-
nation be made, the Manager, acting pursuant to such procedures, will care-
fully monitor the security (focusing on such factors, among others, as trading
activity
 
                                       7
<PAGE>
 
   
and availability of information) to determine that the Rule 144A security con-
tinues to be liquid. It is not possible to predict with assurance exactly how
the market for Rule 144A securities will further evolve. This investment prac-
tice could have the effect of increasing the level of illiquidity in the Fund,
if, and to the extent that, qualified institutional buyers become for a time
uninterested in purchasing Rule 144A securities.     
 
  FOREIGN SECURITIES. The Fund may invest in commercial paper and certificates
of deposit issued by foreign banks and may invest in other securities of for-
eign issuers directly or through American Depositary Receipts ("ADRs"), Euro-
pean Depositary Receipts ("EDRs") or Global Depositary Receipts ("GDRs") (col-
lectively, "Depositary Receipts").
   
  Foreign investments may be affected favorably or unfavorably by changes in
currency rates and exchange control regulations. There may be less information
available about a foreign company than about a U.S. company and foreign compa-
nies may not be subject to reporting standards and requirements comparable to
those applicable to U.S. companies. Foreign securities may not be as liquid as
U.S. securities. Securities of foreign companies may involve greater market
risk than securities of U.S. companies, and foreign brokerage commissions and
custody fees are generally higher than those in the United States. Investments
in foreign securities may also be subject to local economic or political
risks, political instability and possible nationalization of issuers. Deposi-
tary Receipts are instruments generally issued by domestic banks or trust com-
panies that represent the deposits of a security of a foreign issuer. ADRs may
be publicly traded on exchanges or over-the-counter in the United States and
are quoted and settled in dollars at a price that generally reflects the dol-
lar equivalent of the home country share price. EDRs and GDRs are typically
traded in Europe and in both Europe and the United States, respectively. De-
positary Receipts may be issued under sponsored or unsponsored programs. In
sponsored programs, the issuer has made arrangements to have its securities
traded in the form of a Depositary Receipt. In unsponsored programs, the is-
suers may not be directly involved in the creation of the program. Although
regulatory requirements with respect to sponsored and unsponsored Depositary
Receipt programs are generally similar, the issuers of securities represented
by unsponsored Depositary Receipts are not obligated to disclose material in-
formation in the United States, and therefore, the import of such information
may not be reflected in the market value of such receipts. The Fund may invest
up to 10% of its total assets in foreign securities that it holds directly,
but this 10% limit does not apply to foreign securities held through Deposi-
tary Receipts which are traded in the United States or to commercial paper and
certificates of deposit issued by foreign banks.     
 
  GENERAL. Except as noted above, the foregoing investment policies are not
fundamental and the Fund's Board of Directors may change such policies without
the vote of a majority of the Fund's outstanding voting securities. As a mat-
ter of policy, the Board would not change the Fund's investment objectives of
seeking to produce favorable, but not the highest, current income and long-
term growth of both income and capital value without such a vote. A more de-
tailed description of the Fund's investment policies, including a list of
those restrictions on the Fund's investment activities which cannot be changed
without such a vote, appears in the Statement of Additional Information. Under
the 1940 Act, a "vote of a majority of the outstanding voting securities" of
the Fund means the affirmative vote of the lesser of (1) more than 50% of the
outstanding shares of the Fund or (2) 67% or more of the shares present at a
shareholders' meeting if more than 50% of the outstanding shares are repre-
sented at the meeting in person or by proxy.
 
MANAGEMENT SERVICES
 
  THE MANAGER. The Board of Directors provides broad supervision over the af-
fairs of the Fund. Pursuant to a Management Agreement approved by the
 
                                       8
<PAGE>
 
Board and the shareholders of the Fund, the Manager manages the investments of
the Fund and administers the business and other affairs of the Fund. The ad-
dress of the Manager is 100 Park Avenue, New York, NY 10017.
   
  The Manager also serves as manager of seventeen other investment companies
which, together with the Fund, comprise the "Seligman Group." These companies
are: Seligman Capital Fund, Inc., Seligman Cash Management Fund, Inc., Selig-
man Communications and Information Fund, Inc., Seligman Frontier Fund, Inc.,
Seligman Growth Fund, Inc., Seligman Henderson Global Fund Series, Inc., Se-
ligman High Income Fund Series, Seligman Income Fund, Inc., Seligman Municipal
Fund Series, Inc., Seligman Municipal Series Trust, Seligman New Jersey Munic-
ipal Fund, Inc., Seligman Pennsylvania Municipal Fund Series, Seligman Portfo-
lios, Inc., Seligman Quality Municipal Fund, Inc., Seligman Select Municipal
Fund, Inc., Seligman Value Fund Series, Inc. and Tri-Continental Corporation.
The aggregate assets of the Seligman Group were approximately $14.2 billion at
March 31, 1997. The Manager also provides investment management or advice to
institutional accounts having an aggregate value at March 31, 1997 of approxi-
mately $4.2 billion.     
   
  Mr. William C. Morris is Chairman of the Manager and Chairman of the Board
and Chief Executive Officer of the Fund. Mr. Morris owns a majority of the
outstanding voting securities of the Manager.     
 
  The Manager provides senior management for Seligman Data Corp., a wholly-
owned subsidiary of the Fund and certain other investment companies in the Se-
ligman Group, which performs, at cost, certain recordkeeping functions for the
Fund, maintains the records of shareholder accounts and furnishes dividend
paying, redemption and related services.
   
  The Manager is entitled to receive a management fee, calculated daily and
payable monthly. The management fee is equal to an annual rate of .65% of the
Fund's average daily net assets on the first $1 billion of net assets, .60% of
the Fund's average daily net assets on the next $1 billion of net assets and
 .55% of the Fund's average daily net assets in excess of $2 billion. In 1996,
the management fee paid by the Fund was equal to an annual rate of .65% of the
average daily net assets of the Fund. The Fund pays all of its expenses other
than those assumed by the Manager. Total expenses of the Fund's Class A and
Class D shares for the year ended December 31, 1996 amounted to 1.15% and
1.91%, respectively, of the average daily net assets of such class. The
annualized total expenses of the Fund's Class B shares for the period ended
December 31, 1996 amounted to 1.92% of the average daily net assets of such
class.     
 
   THE SUBADVISER. The Subadviser provides investment management services to
the Fund with respect to all or a portion of the Fund's foreign investments,
as designated by the Manager ("Qualifying Assets"). The Fund has a non-funda-
mental policy under which it may invest up to 10% of its total assets in for-
eign securities that are held directly. The 10% limit does not apply to for-
eign securities held through Depositary Receipts which are traded in the
United States or to commercial paper and certificates of deposit issued by
foreign banks. The Subadviser serves the Fund pursuant to a Subadvisory Agree-
ment with the Manager (the "Subadvisory Agreement"), dated June 1, 1994. Pur-
suant to the Subadvisory Agreement, the Subadviser, with respect to the Quali-
fying Assets, provides investment management services including investment re-
search, advice and supervision, determines which securities will be purchased
or sold, makes purchases and sales on behalf of the Fund and determines how
voting and other rights with respect to securities held by the Fund shall be
exercised, subject in each case to the control of the Fund's Board of Direc-
tors and in accordance with the Fund's investment objectives, policies and
principles. For this service, the Subadviser receives a fee from the Manager,
payable monthly. The subadvisory fee rate, which is applied to the average
monthly net
 
                                       9
<PAGE>
 
   
Qualifying Assets of the Fund (i.e., the Qualifying Assets less any liabili-
ties as designated by the Manager), is the same as the overall rate paid to
the Manager by the Fund. At December 31, 1996, net Qualifying Assets were
$62.1 million. For the year ended December 31, 1996, the Subadviser received
from the Manager a fee of $367,285.     
   
  The Subadviser was founded in 1991 as a joint venture between the Manager
and Henderson International, Inc., a controlled affiliate of Henderson plc.
The Subadviser, headquartered in New York, was created to provide interna-
tional and global investment advice to institutional and individual investors
and investment companies. The Subadviser also currently serves as subadviser
to Seligman Capital Fund, Inc., Seligman Communications and Information Fund,
Inc., Seligman Frontier Fund, Inc., Seligman Growth Fund, Inc., Seligman Hen-
derson Global Fund Series, Inc., Seligman Income Fund, Inc., certain portfo-
lios of Seligman Portfolios, Inc., each series of Seligman Value Fund Series,
Inc. and Tri-Continental Corporation. The address of the Subadviser is 100
Park Avenue, New York, NY 10017.     
   
  PORTFOLIO MANAGERS. Charles C. Smith, Jr., a Managing Director of the Manag-
er, has been a Vice President and Portfolio Manager of the Fund since December
1991. He is also a Vice President and Portfolio Manager of Seligman Income
Fund, Inc. and Tri-Continental Corporation and Vice President of Seligman
Portfolios, Inc. ("SPI") and Portfolio Manager of SPI's Seligman Common Stock
Portfolio and Seligman Income Portfolio. Mr. Smith joined the Manager in 1985
as Vice President, Investment Officer. He was promoted to Senior Vice Presi-
dent, Senior Investment Officer in 1992 and Managing Director in January 1994.
       
  Odette S. Galli, Vice President of the Manager, has served as Co-Portfolio
Manager of the Fund since October 1996. She is also Co-Portfolio Manager of
Seligman Common Stock Portfolio of Seligman Portfolios, Inc. and Tri-Continen-
tal Corporation. Ms. Galli joined the Manager in 1993.     
   
  The Subadviser's Global Policy Group has overall responsibility for di-
recting and overseeing all aspects of foreign investment activity for the Fund
and provides international investment policy, including country weightings,
asset allocations and industry sector guidelines, as appropriate. Mr. Iain C.
Clark, a Managing Director and Chief Investment Officer of the Subadviser, is
responsible for the day-to-day foreign investment activity of the Fund, to the
extent there are Qualifying Assets. Mr. Clark, who joined the Subadviser in
1992, has been a Director of Henderson plc since 1985.     
   
  The Manager's discussion of the Fund's performance as well as a line graph
illustrating comparative performance information between the Fund, the Stan-
dard & Poor's 500 Composite Stock Price Index and the Lipper Growth and Income
Funds Average is included in the Fund's 1996 Annual Report to Shareholders.
Copies of the 1996 Annual Report may be obtained, without charge, by calling
or writing the Fund at the telephone numbers or address listed on the cover
page of this Prospectus.     
 
  PORTFOLIO TRANSACTIONS. The Management Agreement and Subadvisory Agreement
each recognize that in the purchase and sale of portfolio securities, the Man-
ager and the Subadviser will seek the most favorable price and execution and,
consistent with that policy, may give consideration to the research, statisti-
cal and other services furnished by brokers or dealers to the Manager and
Subadviser. The use of brokers who provide investment and market research and
securities and economic analysis may result in higher brokerage charges than
the use of brokers selected on the basis of the most favorable brokerage com-
mission rates, and research and analysis received may be useful to the Manager
and Subadviser in connection with its services to other clients as well as to
the Fund. In over-the-counter markets, orders
 
                                      10
<PAGE>
 
are placed with responsible primary market makers unless a more favorable exe-
cution or price is believed to be obtainable.
   
  Consistent with the Rules of the National Association of Securities Dealers,
Inc., and subject to seeking the most favorable price and execution available
and such other policies as the Directors of the Fund may determine, the Man-
ager and Subadviser may consider sales of shares of the Fund and, if permitted
by applicable laws, may consider sales of shares of the other Seligman Mutual
Funds as a factor in the selection of brokers or dealers to execute portfolio
transactions for the Fund.     
 
  PORTFOLIO TURNOVER. A change in securities held by the Fund is known as
"portfolio turnover" which may result in the payment by the Fund of dealer
spreads or underwriting commissions and other transaction costs on the sale of
securities as well as on the reinvestment of the proceeds in other securities.
Although it is the policy of the Fund to hold securities for investment,
changes in securities held by the Fund will be made from time to time when the
Manager and Subadviser believe such changes will strengthen the Fund's
portfolio. The portfolio turnover of the Fund is not expected to exceed 100%.
 
PURCHASE OF SHARES
 
  Seligman Financial Services, Inc. ("SFSI"), an affiliate of the Manager,
acts as general distributor of the Fund's shares. Its address is 100 Park Ave-
nue, New York, NY 10017.
 
  The Fund issues three classes of shares: Class A shares are sold to invest-
ors choosing the initial sales load alternative; Class B shares are sold to
investors choosing to pay no initial sales load, a higher distribution fee and
a CDSL with respect to redemptions within six years of purchase and who desire
shares to convert automatically to Class A shares after eight years; and Class
D shares are sold to investors choosing no initial sales load, a higher dis-
tribution fee and a CDSL on redemptions within one year of purchase. See "Al-
ternative Distribution System" above.
 
  Shares of the Fund may be purchased through any authorized investment deal-
er. All orders will be executed at the net asset value per share next computed
after receipt of the purchase order plus, in the case of Class A shares, a
sales load which, except for shares purchased under one of the reduced sales
load plans, will vary with the size of the purchase as shown in the schedule
under "Class A Shares--Initial Sales Load" below.
   
  THE MINIMUM AMOUNT FOR INITIAL INVESTMENT IN THE FUND IS $1,000; SUBSEQUENT
INVESTMENTS MUST BE IN THE MINIMUM AMOUNT OF $100 (EXCEPT FOR INVESTMENT OF
DIVIDENDS AND CAPITAL GAIN DISTRIBUTIONS). THE FUND RESERVES THE RIGHT TO RE-
TURN INVESTMENTS THAT DO NOT MEET THESE MINIMUMS. EXCEPTIONS TO THESE MINIMUMS
ARE AVAILABLE FOR ACCOUNTS BEING ESTABLISHED CONCURRENTLY WITH THE INVEST-A-
CHECK(R) SERVICE. THE MINIMUM AMOUNT FOR INITIAL INVESTMENT IN THE SELIGMAN
TIME HORIZON MATRIXSM ASSET ALLOCATION PROGRAM IS $10,000. FOR INFORMATION
ABOUT THIS PROGRAM, CONTACT YOUR FINANCIAL ADVISOR.     
   
  No purchase order may be placed for Class B shares for an amount of $250,000
or more.     
   
  Orders received by an authorized dealer before the close of the New York
Stock Exchange ("NYSE") (normally, 4:00 p.m. Eastern time) and accepted by
SFSI before the close of business (5:00 p.m. Eastern time) on the same day
will be executed at the Fund's net asset value determined as of the close of
the NYSE on that day plus, in the case of Class A shares, any applicable sales
load. Orders accepted by dealers after the close of the NYSE, or received by
SFSI after the close of business, will be executed at the Fund's net asset
value as next determined plus, in the case of Class A shares, any applicable
sales load. The authorized dealer through which a shareholder purchases shares
is responsible for forwarding the order to SFSI promptly.     
 
                                      11
<PAGE>
 
  Payment for dealer purchases may be made by check or by wire. To wire pay-
ments, dealer orders must first be placed through SFSI's order desk and as-
signed a purchase confirmation number. Funds in payment of the purchase may
then be wired to Mellon Bank, N.A., ABA #043000261, A/C Seligman Common Stock
Fund, Inc. (A, B or D), A/C #107-1011. WIRE TRANSFERS MUST INCLUDE THE PUR-
CHASE CONFIRMATION NUMBER AND CLIENT ACCOUNT REGISTRATION AND ACCOUNT NUMBER.
Persons other than dealers who wish to wire payment should contact Seligman
Data Corp. for specific wire instructions. Although the Fund makes no charge
for this service, the transmitting bank may impose a wire service fee.
   
  Current shareholders may purchase additional shares of the Fund at any time
through any authorized dealer or by sending a check payable to the "Seligman
Group of Funds" in our postage-paid return envelope or directly to P.O. BOX
3947, NEW YORK, NY 10008-3947. Checks for investment must be in U.S. dollars
drawn on a domestic bank. Credit card convenience checks and third party
checks (i.e., checks made payable to someone other than the "Seligman Group of
Funds") may not be used to open a new fund account or purchase additional
shares of the Fund. The check should be accompanied by an investment slip
(provided on the bottom of shareholder account statements) and include the
shareholder's name, address, account number, name of Fund and class of shares
(A, B or D). If a shareholder does not provide the required information, Se-
ligman Data Corp. will seek further clarification and may be forced to return
the check to the shareholder. Orders sent directly to Seligman Data Corp. will
be executed at the Fund's net asset value next determined after the order is
accepted plus, in the case of Class A shares, any applicable sales load.     
   
  Seligman Data Corp. may charge a $10.00 service fee for checks returned to
it as uncollectable. This charge may be deducted from the shareholder's ac-
count. For the protection of the Fund and its shareholders, no redemption pro-
ceeds will be remitted to a shareholder with respect to shares purchased by
check (unless certified) until Seligman Data Corp. receives notice that the
check has cleared, which may be up to 15 days from the credit of the shares to
the shareholder's account.     
 
  VALUATION. The net asset value of the Fund's shares is determined each day,
Monday through Friday, as of the close of trading on the NYSE (normally, 4:00
p.m. Eastern time) on each day that the NYSE is open for business. Net asset
value is calculated separately for each class. Securities traded on a U.S. or
foreign exchange or over-the-counter market are valued at the last sales price
on the primary exchange or market on which they are traded. United Kingdom se-
curities and securities for which there are no recent sales transactions are
valued based on quotations provided by primary market makers in such securi-
ties. Any securities for which recent market quotations are not readily avail-
able are valued at fair value determined in accordance with procedures ap-
proved by the Fund's Board of Directors. Short-term holdings maturing in 60
days or less are generally valued at amortized cost if their original maturity
was 60 days or less. Short-term holdings with more than 60 days remaining to
maturity will be valued at current market value until the 61st day prior to
maturity, and will then be valued on an amortized cost basis based on the
value as of such date unless the Board determines that amortized cost value
does not represent fair market value.
 
  Although the legal rights of Class A, Class B and Class D shares are sub-
stantially identical, the different expenses borne by each class will result
in different net asset values and dividends. The net asset values of Class B
and Class D shares will generally be lower than the net asset value of Class A
shares as a result of the higher distribution fee charged to Class B and Class
D shares. In addition, net asset value per share of the three classes will be
affected to the extent any other expenses differ among classes.
 
  CLASS A SHARES--INITIAL SALES LOAD. Class A shares are subject to an initial
sales load which varies
 
                                      12
<PAGE>
 
with the size of the purchase as shown in the following schedule, and an an-
nual service fee of up to .25% of the average daily net asset value of Class A
shares. See "Administration, Shareholder Services and Distribution Plan" be-
low.
 
                      CLASS A SHARES--SALES LOAD SCHEDULE
 
<TABLE>   
<CAPTION>
                               SALES LOAD AS A
                                PERCENTAGE OF
                             -------------------
                                                  REGULAR
                                                  DEALER
                                      NET AMOUNT DISCOUNT
                                       INVESTED  AS A % OF
         AMOUNT OF           OFFERING (NET ASSET OFFERING
          PURCHASE            PRICE     VALUE)     PRICE
  -------------------------- -------- ---------- ---------
  <S>               <C>      <C>      <C>        <C>
         Less than  $50,000    4.75%     4.99%     4.25%
  $        50,000-   99,999    4.00      4.17      3.50
          100,000-  249,999    3.50      3.63      3.00
          250,000-  499,999    2.50      2.56      2.25
          500,000-  999,999    2.00      2.04      1.75
        1,000,000-  or more*      0         0         0
</TABLE>    
 -------
    
 * Shares acquired at net asset
   value pursuant to the above
   schedule will be subject to a
   CDSL of 1% if redeemed within 18
   months of purchase. See "Pur-
   chase of Shares--Contingent De-
   ferred Sales Load."     
   
  There is no initial sales load on purchases of Class A shares of $1,000,000
or more ("NAV sales"); however, such shares are subject to a CDSL of 1% if re-
deemed within eighteen months of purchase.     
   
  SFSI shall pay broker/dealers, from its own resources, a fee on NAV sales,
calculated as follows: 1.00% of NAV sales up to but not including $2 million;
 .80% of NAV sales from $2 million up to but not including $3 million; .50% of
NAV sales from $3 million up to but not including $5 million; and .25% of NAV
sales from $5 million and above. The calculation of the fee will be based on
assets held by a "single person" as defined below.     
   
  SFSI shall also pay broker/dealers, from its own resources, a fee on assets
of certain investments in Class A shares of the Seligman Mutual Funds partici-
pating in an "eligible employee benefit plan" (as defined below under "Special
Programs") that are attributable to the particular broker/dealer. The shares
eligible for the fee are those on which an initial front-end sales load was
not paid because either the participating eligible employee benefit plan has
at least $500,000 invested in the Seligman Mutual Funds or (ii) 50 eligible
employees to whom such plan is made available. Class A shares representing
only an initial purchase of Seligman Cash Management Fund are not eligible for
the fee. Such shares will become eligible for the fee once they are exchanged
for shares of another Seligman Mutual Fund. The payment is based on cumulative
sales during a single calendar year, or portion thereof. The payment schedule,
for each calendar year, is a follows: 1.00% of sales up to but not including
$2 million; .80% of sales from $2 million up to but not including $3 million;
 .50% of sales from $3 million up to but not including $5 million; and .25% of
sales from $5 million and above.     
 
  REDUCED SALES LOADS. Reductions in sales loads apply to purchases of Class A
shares by a "single person," including an individual, members of a family unit
comprising husband, wife and minor children purchasing securities for their
own account, or a trustee or other fiduciary purchasing for a single fiduciary
account or single trust. Purchases made by a trustee or other fiduciary for a
fiduciary account may not be aggregated with purchases made on behalf of any
other fiduciary or individual account.
   
  Shares purchased without an initial sales load in accordance with the sales
load schedule or pursuant to a Volume Discount, Right of Accumulation or Let-
ter of Intent are subject to a CDSL of 1% on redemptions within eighteen
months of purchase.     
   
 . VOLUME DISCOUNTS are provided if the total amount being invested in Class A
shares of the Fund alone, or in any combination of shares of the Seligman Mu-
tual Funds that are sold with an initial sales load, reaches levels indicated
in the above sales load schedule.     
   
 . THE RIGHT OF ACCUMULATION allows an investor to combine the amount being in-
vested in shares of the other Seligman Mutual Funds sold with an initial sales
load with the total net asset value of shares of those     
 
                                      13
<PAGE>
 
   
Seligman Mutual Funds already owned that were sold with an initial sales load
and the total net asset value of shares of Seligman Cash Management Fund that
were acquired by the investor through an exchange of shares of another Selig-
man Mutual Fund on which there was an initial sales load to determine reduced
sales loads in accordance with the sales load schedule. An investor or a
dealer purchasing shares on behalf of an investor must indicate that the in-
vestor has existing accounts when making investments or opening new accounts.
       
 . A LETTER OF INTENT allows an investor to purchase Class A shares over a 13-
month period at reduced initial sales loads, based upon the total amount the
investor intends to purchase plus the total net asset value of shares of the
Seligman Mutual Funds already owned that were sold with an initial sales load
and the total net asset value of shares of Seligman Cash Management Fund that
were acquired through an exchange of shares of another Seligman Mutual Fund on
which there was an initial sales load. An investor or a dealer purchasing
shares on behalf of an investor must indicate that the investor has existing
accounts when making investments or opening new accounts. For more information
concerning terms of Letters of Intent, see "Terms and Conditions" on page 29.
    
  SPECIAL PROGRAMS. The Fund may sell Class A shares at net asset value to
present and retired directors, trustees, officers, employees and their spouses
(and family members of the foregoing) of the Fund, the other investment compa-
nies in the Seligman Group, the Manager and other companies affiliated with
the Manager. Family members are defined to include lineal descendants and lin-
eal ancestors, siblings (and their spouses and children) and any company or
organization controlled by any of the foregoing. Such sales also may be made
to employee benefit and thrift plans for such persons and to any investment
advisory, custodial, trust or other fiduciary account managed or advised by
the Manager or any affiliate.
   
  Class A shares also may be issued without an initial sales load in connection
with the acquisition of cash and securities owned by other investment companies;
to any registered unit investment trust which is the issuer of periodic payment
plan certificates, the net proceeds of which are invested in Fund shares; to
separate accounts established and maintained by an insurance company which are
exempt from registration under Section 3(c)(11) of the 1940 Act; to registered
representatives and employees (and their spouses and minor children) of any
dealer that has a sales agreement with SFSI; to shareholders of mutual funds
with objectives and policies similar to the Fund who purchase shares with
redemption proceeds of such funds (not to exceed the dollar value of such
redemption proceeds); to financial institution trust departments; to registered
investment advisers exercising discretionary investment authority with respect
to the purchase of Fund shares; to accounts of financial institutions or
broker/dealers that charge account management fees, provided the Manager or one
of its affiliates has entered into an agreement with respect to such accounts;
pursuant to sponsored arrangements with organizations which make recommendations
to or permit group solicitations of, its employees, members or participants in
connection with the purchase of shares of the Fund; to other investment
companies in the Seligman Group in connection with a deferred fee arrangement
for outside directors; and to "eligible employee benefit plans" which have at
least (i) $500,000 invested in the Seligman Mutual Funds or (ii) 50 eligible
employees to whom such plan is made available. "Eligible employee benefit plan"
means any plan or arrangement, whether or not tax qualified, which provides for
the purchase of Fund shares. Sales of shares to such plans must be made in
connection with a payroll deduction system of plan funding or other system
acceptable to Seligman Data Corp.     
   
  Section 403(b) plans sponsored by public educational institutions are not
eligible for net asset value purchases based on the aggregate investment made
by the plan or number of eligible employees. Employee benefit plans eligible
for net asset value sales, as described above, will be subject to a CDSL of 1%
for terminations at the plan level only, on redemptions of shares purchased
within eighteen months of plan     
 
                                      14
<PAGE>
 
   
termination. Sales pursuant to a 401(k) alliance program which has an agree-
ment with SFSI are available at net asset value and are not subject to a CDSL.
    
       
  CLASS B SHARES. Class B shares are sold without an initial sales load but
are subject to a CDSL if the shares are redeemed within six years of purchase
at rates set forth in the table below, charged as a percentage of the current
net asset value or the original purchase price, whichever is less.
 
<TABLE>
<CAPTION>
YEARS SINCE PURCHASE                                                        CDSL
- --------------------                                                        ----
<S>                                                                         <C>
less than 1 year...........................................................  5%
1 year or more but less than 2 years.......................................  4%
2 years or more but less than 3 years......................................  3%
3 years or more but less than 4 years......................................  3%
4 years or more but less than 5 years......................................  2%
5 years or more but less than 6 years......................................  1%
6 years or more............................................................  0%
</TABLE>
   
  Class B shares are also subject to an annual distribution fee of .75% and an
annual service fee of up to .25% of the average daily net asset value of the
Class B shares. SFSI will make a 4% payment to dealers in respect of purchases
of Class B shares. Approximately eight years after purchase, Class B shares
will convert automatically to Class A shares which are subject to an annual
service fee of .25% but no distribution fee. Shares purchased through rein-
vestment of dividends and distributions on Class B shares also will convert
automatically to Class A shares along with the underlying shares on which they
were earned. Conversion occurs at the end of the month which precedes the
eighth anniversary of the purchase date. If Class B shares of the Fund are ex-
changed for Class B shares of another Seligman Mutual Fund, the conversion pe-
riod applicable to the Class B shares acquired in the exchange will apply, and
the holding period of the shares exchanged will be tacked onto the holding pe-
riod of the shares acquired. Class B shareholders of the Fund exercising the
exchange privilege will continue to be subject to the Fund's CDSL schedule if
such schedule is higher or longer than the CDSL schedule relating to the new
Class B shares. In addition, Class B shares of the Fund acquired by exchange
will be subject to the Fund's CDSL schedule if such schedule is higher or
longer than the CDSL schedule relating to the Class B shares of the fund from
which the exchange has been made.     
 
  CLASS D SHARES. Class D shares are sold without an initial sales load but
are subject to a CDSL if the shares are redeemed within one year, an annual
distribution fee of up to .75% and an annual service fee of up to .25%, of the
average daily net asset value of the Class D shares. SFSI will make a 1% pay-
ment to dealers in respect of purchases of Class D shares. Unlike Class B
shares, Class D shares do not automatically convert to Class A shares after
eight years.
   
  CONTINGENT DEFERRED SALES LOAD. A CDSL will be imposed on any redemption of
Class B or Class D shares which were purchased during the preceding six years
(for Class B shares) or twelve months (for Class D shares). The amount of any
CDSL will initially be used by SFSI to defray the expense of the payment of 4%
(in the case of Class B shares) or 1% (in the case of Class D shares) made by
it to Service Organizations (as defined under "Administration, Shareholder
Services and Distribution Plan") at the time of sale. Pursuant to an agreement
with FEP Capital, L.P. ("FEP") to fund payments in respect of Class B shares,
SFSI has agreed to pay any Class B CDSL to FEP.     
   
  A CDSL of 1% will also be imposed on any redemption of Class A shares pur-
chased during the preceding eighteen months if such shares were acquired at
net asset value pursuant to the sales load schedule provided under "Class A
Shares--Initial Sales Load." Employee benefit plans eligible for net asset
sales as     
 
                                      15
<PAGE>
 
   
described above under "Special Programs" may be subject to a CDSL of 1% for
terminations at the plan level only, or redemptions of shares purchased within
eighteen months prior to plan termination.     
   
  The 1% CDSL normally imposed on redemptions of certain Class A shares (i.e.,
those purchased during the preceding eighteen months at net asset value pursu-
ant to the sales load schedule provided under "Class A Shares--Initial Sales
Load") will be waived on shares that were purchased through Dean Witter Reyn-
olds, Inc. ("Dean Witter") by certain Chilean institutional investors (i.e.,
pension plans, insurance companies and mutual funds). Upon redemption of such
shares within an eighteen month period, Dean Witter will reimburse SFSI a pro
rata portion of the fee it received from SFSI at the time of sale of such
shares.     
   
  To minimize the application of a CDSL to a redemption, shares acquired pur-
suant to the investment of dividends and distributions (which are not subject
to a CDSL) will be redeemed first; followed by shares held for a period of
time longer than the applicable CDSL period. Shares held for the longest pe-
riod of time within the applicable period will then be redeemed. Additionally,
for those shares determined to be subject to a CDSL, the CDSL will be assessed
on the current net asset value or original purchase price, whichever is less.
No CDSL will be imposed on shares acquired through the investment of dividends
or distributions from any Class A, Class B or Class D shares of Seligman Mu-
tual Funds.     
 
  For example, assume an investor purchased 100 Class D shares in January at a
price of $10.00 per share. During the first year, 5 additional Class D shares
were acquired through investment of dividends and distributions. In January of
the following year, an additional 50 Class D shares are purchased at a price
of $12.00 per share. In March of that year, the investor chooses to redeem
$1,500.00 from the account which now holds 155 Class D shares with a total
value of $1,898.75 ($12.25 per share). The CDSL for this transaction would be
calculated as follows:
 
<TABLE>   
<S>                                                                   <C>
Total shares to be redeemed
 (122.449 @ $12.25) as follows:...................................... $1,500.00
                                                                      =========
Dividend/Distribution shares
 (5 @ $12.25)........................................................     61.25
Shares held more than 1 year
 (100 @ $12.25)......................................................  1,225.00
Shares held less than 1 year subject to CDSL (17.449 @ $12.25).......    213.75
                                                                      ---------
 Gross proceeds of redemption........................................ $1,500.00
 Less CDSL (17.449 shares @
  $12.00 = $209.39 X 1% = $2.09).....................................     (2.09)
                                                                      ---------
 Net proceeds of redemption.......................................... $1,497.91
                                                                      =========
</TABLE>    
   
  For federal income tax purposes, the amount of the CDSL will reduce the gain
or increase the loss, as the case may be, on the amount recognized on the re-
demption of shares.     
 
  The CDSL will be waived or reduced in the following instances:
   
  (a) on redemptions following the death or disability of a shareholder, as
defined in section 72(m)(7) of the Internal Revenue Code of 1986, as amended
(the "Code"); (b) in connection with (i) distributions from retirement plans
qualified under section 401(a) of the Code when such redemptions are necessary
to make distributions to plan participants (such payments include, but are not
limited to death, disability, retirement, or separation of service), (ii) dis-
tributions from a custodial account under section 403(b)(7) of the Code or an
individual retirement account (an "IRA") due to death, disability, or attain-
ment of age 59 1/2, and (iii) a tax-free return of an excess contribution to
an IRA; (c) in whole or in part, in connection with shares sold to current and
retired Directors of the Fund; (d) in whole or in part, in connection with
shares sold to any state, county, or city or any instrumentality, department,
authority, or agency thereof, which is prohibited by applicable investment
laws from paying a sales load or commission in connection     
 
                                      16
<PAGE>
 
   
with the purchase of shares of any registered investment management company;
(e) pursuant to an auto- matic cash withdrawal service; and (f) in connection
with the redemption of shares of the Fund if the Fund is combined with another
mutual fund in the Seligman Group, or another similar reorganization transac-
tion.     
   
  If, with respect to a redemption of any Class A, Class B or Class D shares
sold by a dealer, the CDSL is waived because the redemption qualifies for a
waiver as set forth above, the dealer shall remit to SFSI promptly upon notice
an amount equal to the payment or a portion of the payment made by SFSI at the
time of sale of such shares.     
   
  For the period from the date Seligman Global Horizon Funds (the "Offshore
Fund") commences offering its shares, until May 31, 1997, SFSI will reimburse
any CDSL charged upon the redemption of Class B or Class D shares of any Se-
ligman Mutual Fund by a non-U.S. resident alien investor who uses the redemp-
tion proceeds to purchase Class B or Class A shares, respectively, of the Off-
shore Fund through Merrill Lynch, Pierce, Fenner & Smith Incorporated, or any
of its affiliates (collectively, "Merrill Lynch"). Merrill Lynch will, in
turn, reimburse SFSI for the amount of CDSL so reimbursed by it over a period
of four years.     
   
  SFSI may from time to time assist dealers by, among other things, providing
sales literature to, and holding informational programs for the benefit of,
dealers' registered representatives. Dealers may limit the participation of
registered representatives in such informational programs by means of sales
incentive programs which may require the sale of minimum dollar amounts of
shares of the Seligman Mutual Funds. SFSI may from time to time pay a bonus or
other incentive to dealers that sell shares of the Seligman Mutual Funds. In
some instances, these bonuses or incentives may be offered only to certain
dealers which employ registered representatives who have sold or may sell a
significant amount of shares of the Fund and/or certain other mutual funds
managed by the Manager during a specified period of time. Such bonus or other
incentive may take the form of payment for travel expenses, including lodging,
incurred in connection with trips taken by qualifying registered representa-
tives and members of their families to places within or outside the United
States. The cost to SFSI of such promotional activities and payments shall be
consistent with the Rules of the National Association of Securities Dealers,
Inc., as then in effect.     
 
TELEPHONE TRANSACTIONS
 
  A shareholder with telephone transaction privileges, AND THE SHAREHOLDER'S
BROKER/DEALER REPRESENTATIVE, will have the ability to effect the following
transactions via telephone: (i) redemption of Fund shares, (ii) exchange of
Fund shares for shares of the same class of another Seligman Mutual Fund,
(iii) change of a dividend and/or capital gain distribution option, and (iv)
change of address. All telephone transactions are effected through Seligman
Data Corp. at (800) 221-2450.
 
  For investors who purchase shares by completing and submitting an Account
Application (except those accounts registered as trusts (unless the trustee
and sole beneficiary are the same person), corporations or group retirement
plans): Unless an election is made otherwise on the Account Application, a
shareholder and the shareholder's broker/ dealer of record as designated on
the Account Application, will automatically receive telephone services.
 
  For investors who purchase shares through a broker/dealer: Telephone serv-
ices for a shareholder and the shareholder's representative may be elected by
completing a supplemental election application available from the
broker/dealer of record.
 
  For accounts registered as IRAs. Telephone services will include only ex-
changes or address changes.
   
  For accounts registered as trusts (unless the trustee and sole beneficiary
are the same person), corporations or group retirement plans: Telephone re-
demptions are not permitted. Group retirement plans     
 
                                      17
<PAGE>
 
   
that may allow plan participants to place telephone exchanges directly with
the Fund must first provide a letter of authorization signed by the plan cus-
todian or trustee, and provide a telephone services election form signed by
each plan participant. Additionally, group retirement plans are not permitted
to change a dividend or gain distribution option.     
   
  All Seligman Mutual Fund accounts with the same account number (i.e., regis-
tered exactly the same) as an existing account, including any new fund in
which the shareholder invests in the future, will automatically include tele-
phone services if the existing account has telephone services. Telephone serv-
ices may also be elected at any time on a supplemental telephone services
election form.     
 
  For accounts registered jointly (such as joint tenancies, tenants in common
and community property registrations), each owner, by accepting or requesting
telephone services, authorizes each of the other owners to effect telephone
transactions on his or her behalf.
   
  During times of drastic economic or market changes, a shareholder or the
shareholder's representative may experience difficulty in contacting Seligman
Data Corp. to request a redemption or exchange of Fund shares via telephone.
In these circumstances, the shareholder or the shareholder's representative
should consider using other redemption or exchange procedures. (See "Redemp-
tion of Shares" below.) Use of these other redemption or exchange procedures
may result in the request being processed at a later time than if a telephone
transaction had been used, and the Fund's net asset value may fluctuate during
such periods.     
   
  The Fund and Seligman Data Corp. will employ reasonable procedures to con-
firm that instructions communicated by telephone are genuine. These will in-
clude: recording all telephone calls requesting account activity, requiring
that the caller provide certain requested personal and/or account information
at the time of the call for the purpose of establishing the caller's identity,
and sending a written confirmation of redemptions, exchanges or address
changes to the address of record each time activity is initiated by telephone.
As long as the Fund and Seligman Data Corp. follow instructions communicated
by telephone that were reasonably believed to be genuine at the time of their
receipt, neither they nor any of their affiliates will be liable for any loss
to the shareholder caused by an unauthorized transaction. In any instance
where the Fund or Seligman Data Corp. is not reasonably satisfied that in-
structions received by telephone are genuine, the requested transaction will
not be executed, and neither they nor any of their affiliates will be liable
for any losses which may occur due to a delay in implementing the transaction.
If the Fund or Seligman Data Corp. does not follow the procedures described
above, the Fund or Seligman Data Corp. may be liable for any losses due to un-
authorized or fraudulent instructions. Telephone transactions must be effected
through a representative of Seligman Data Corp., i.e., requests may not be
communicated via Seligman Data Corp.'s automated telephone answering system.
Shareholders, of course, may refuse or cancel telephone services. Telephone
services may be terminated by a shareholder at any time by sending a written
request to Seligman Data Corp. TELEPHONE SERVICES MAY NOT BE ESTABLISHED BY A
SHAREHOLDER'S BROKER/DEALER WITHOUT THE WRITTEN AUTHORIZATION OF THE SHARE-
HOLDER. Written acknowledgment of the addition of telephone services to an ex-
isting account or termination of telephone services will be sent to the share-
holder at the address of record.     
 
REDEMPTION OF SHARES
   
  A shareholder may redeem shares held in book credit ("uncertificated") form
without charge, except a CDSL, if applicable, at any time by SENDING A WRITTEN
REQUEST to Seligman Data Corp., P.O. Box 3947, New York, NY 10008-3947; or if
the request is being sent by overnight delivery service to 100 Park Avenue,
New York, NY, 10017. The redemption request must be signed by all persons in
whose name the shares are registered. A shareholder may redeem shares     
 
                                      18
<PAGE>
 
   
that are not in book credit form without charge, except a CDSL, if applicable
by surrendering certificates in proper form to the same address. Certificates
should be sent by registered mail. Share certificates must be endorsed for
transfer or accompanied by an endorsed stock power signed by all share owners
exactly as their name(s) appear(s) on the account registration. The sharehold-
er's letter of instruction or endorsed stock power should specify the Fund
name, account number, class of shares (A, B or D) and the number of shares or
dollar amount to be redeemed. The Fund cannot accept conditional redemption
requests (i.e., requests to sell shares at a specific price or on a future
date).     
   
  If the redemption proceeds are (i) $50,000 or more, (ii) to be paid to some-
one other than the shareholder of record (regardless of the amount) or (iii)
to be mailed to other than the address of record (regardless of the amount),
the signature(s) of the shareholder(s) must be guaranteed by an eligible fi-
nancial institution including, but not limited to, the following: banks, trust
companies, credit unions, securities brokers and dealers, savings and loan as-
sociations and participants in the Securities Transfer Association Medallion
Program (STAMP), the Stock Exchanges Medallion Program (SEMP) or the New York
Stock Exchange Medallion Signature Program (MSP). The Fund reserves the right
to reject a signature guarantee where it is believed that the Fund will be
placed at risk by accepting such guarantee. A signature guarantee is also nec-
essary in order to change the account registration. Notarization by a notary
public is not an acceptable signature guarantee. ADDITIONAL DOCUMENTATION MAY
ALSO BE REQUIRED BY SELIGMAN DATA CORP. IN THE EVENT OF A REDEMPTION BY A COR-
PORATION, EXECUTOR, ADMINISTRATOR, TRUSTEE, CUSTODIAN OR RETIREMENT PLAN. FOR
FURTHER INFORMATION WITH RESPECT TO REDEMPTION REQUIREMENTS, PLEASE CONTACT
THE SHAREHOLDER SERVICES DEPARTMENT OF SELIGMAN DATA CORP. FOR ASSISTANCE.
       
  In the case of Class A shares (except for shares purchased without an ini-
tial sales load due to the size of the purchase), and in the case of Class B
shares redeemed after six years and Class D shares redeemed after one year, a
shareholder will receive the net asset value per share next determined after
receipt of a request in good order. If Class A shares which were purchased
without an initial sales load because the purchase amount was $1,000,000 or
more are redeemed within eighteen months of purchase, a shareholder will re-
ceive the net asset value per share next determined after receipt of a request
in good order, less a CDSL of 1% as described under "Purchase of Shares--Class
A Shares--Initial Sales Load" above. If Class B shares are redeemed within six
years of purchase, a shareholder will receive the net asset value per share
next determined after receipt of the request in good order less the applicable
CDSL, as described under "Purchase of Shares--Class B Shares" above. If Class
D shares are redeemed within one year of purchase, a shareholder will receive
the net asset value per share next determined after receipt of the request in
good order, less a CDSL of 1% as described under "Purchase of Shares--Class D
Shares" above.     
 
  A shareholder also may "sell" shares to the Fund through an investment
dealer and, in that way, be certain, providing the order is timely, of receiv-
ing the net asset value established at the end of the day on which the dealer
is given the repurchase order (less any applicable CDSL). The Fund makes no
charge for this transaction, but the dealer may charge you a service fee.
"Sell" or repurchase orders received from an authorized dealer before the
close of the NYSE and received by SFSI, the repurchase agent, before the close
of business on the same day will be executed at the net asset value per share
determined as of the close of the NYSE on that day, less any applicable CDSL.
Repurchase orders received from authorized dealers after the close of the NYSE
or not received by SFSI prior to the close of business will be executed at the
net asset value determined as of the close of the NYSE on the next trading
day, less any applicable CDSL. Shares held in a "street name" account with a
broker/dealer may be sold to the Fund only through a broker/dealer.
 
                                      19
<PAGE>
 
   
  TELEPHONE REDEMPTIONS. Telephone redemptions of uncertificated shares payable
to the address of record may be made once per day, in an amount of up to
$50,000 per fund account. Telephone redemption requests must be received by Se-
ligman Data Corp. at (800) 221-2450 between 8:30 a.m. and 4:00 p.m. Eastern
time, on any business day and will be processed as of the close of business on
that day. Redemption requests by telephone will not be accepted within 30 days
following an address change. Qualified Plans, IRAs or other retirement plans
are not eligible for telephone redemptions. The Fund reserves the right to sus-
pend or terminate its telephone redemption service at any time without notice.
    
  For more information about telephone redemptions and the circumstances under
which a share holder may bear the risk of loss for a fraudulent transaction,
see "Telephone Transactions" above.
   
  GENERAL. With respect to shares redeemed, a check for the proceeds will be
sent to the shareholder's address of record within seven calendar days after
acceptance of the redemption order and will be made payable to all of the reg-
istered owners on the account. With respect to shares repurchased by the Fund,
a check for the proceeds will be sent to the investment dealer within seven
calendar days after acceptance of the repurchase order and will be made payable
to the investment dealer. Payment of redemption proceeds will be delayed on re-
demptions of shares purchased by check (unless certified) until Seligman Data
Corp. receives notice that the check has cleared, which may be up to 15 days
from the credit of such shares to the shareholder's account. The proceeds of a
redemption or repurchase may be more or less than the shareholder's cost.     
 
  The Fund reserves the right to redeem shares owned by a shareholder whose in-
vestment in the Fund has a value of less than a minimum amount specified by the
Fund's Board of Directors, which is presently $500. Shareholders would be sent
a notice before the redemption is processed stating that the value of the in-
vestment in the Fund is less than the specified minimum and that they have
sixty days to make an additional investment.
   
  REINSTATEMENT PRIVILEGE. If a shareholder redeems Class A shares and then de-
cides to reinvest them, or to shift the investment to one of the other Seligman
Mutual Funds, the shareholder may, within 120 calendar days of the date of the
redemption, use all or any part of the proceeds of the redemption to reinstate,
free of an initial sales load, all or any part of the investment in shares of
the Fund or in shares of any of the other Seligman Mutual Funds. If a share-
holder redeems shares and the redemption was subject to a CDSL the shareholder
may reinstate all or any part of the investment in shares of the same class of
the Fund or of any of the other Seligman Mutual Funds within 120 calendar days
of the date of redemption and receive a credit for the applicable CDSL paid.
Such investment will be reinstated at the net asset value per share established
as of the close of the NYSE on the day the request is received. Seligman Data
Corp. must be informed that the purchase represents a reinstated investment.
REINSTATED SHARES MUST BE REGISTERED EXACTLY AND BE OF THE SAME CLASS AS THE
SHARES PREVIOUSLY REDEEMED AND THE FUND'S MINIMUM INITIAL INVESTMENT AMOUNT
MUST BE MET AT THE TIME OF REINSTATEMENT.     
   
  Generally, exercise of the Reinstatement Privilege does not alter the federal
income tax status of any capital gain realized on a sale of Fund shares, but to
the extent that any shares are sold at a loss and the proceeds are reinvested
in shares of the same fund, some or all of the loss will not be allowed as a
deduction, depending upon the percentage of the proceeds reinvested.     
 
ADMINISTRATION, SHAREHOLDER SERVICES AND DISTRIBUTION PLAN
 
  Under the Fund's Administration, Shareholder Services and Distribution Plan
(the "Plan"), the Fund may pay to SFSI an administration, shareholder services
and distribution fee in respect of the Fund's Class A, Class B and Class D
shares. Payments under the
 
                                       20
<PAGE>
 
Plan may include, but are not limited to: (i) compensation to securities deal-
ers and other organizations ("Service Organizations") for providing distribu-
tion assistance with respect to assets invested in the Fund, (ii) compensation
to Service Organizations for providing administration, accounting and other
shareholder services with respect to Fund shareholders, and (iii) otherwise
promoting the sale of shares of the Fund, including paying for the preparation
of advertising and sales literature and the printing and distribution of such
promotional materials and prospectuses to prospective investors and defraying
SFSI's costs incurred in connection with its marketing efforts with respect to
shares of the Fund. The Manager, in its sole discretion, may also make similar
payments to SFSI from its own resources, which may include the management fee
that the Manager receives from the Fund.
 
  Under the Plan, the Fund reimburses SFSI for its expenses with respect to
Class A shares at an annual rate of up to .25% of the average daily net asset
value of Class A shares. It is expected that the proceeds from the fee in re-
spect of Class A shares will be used primarily to compensate Service Organiza-
tions which enter into agreements with SFSI. Such Service Organizations will
receive from SFSI a continuing fee of up to .25% on an annual basis, payable
quarterly, of the average daily net assets of Class A shares attributable to
the particular Service Organization for providing personal service and/or the
maintenance of shareholder accounts. The fee payable from time to time is,
within such limit, determined by the Directors of the Fund.
   
  The Plan, as it relates to Class A shares, was approved by shareholders on
November 23, 1992 and became effective on January 1, 1993. The total amount
paid for the year ended December 31, 1996 in respect of the Fund's Class A
shares pursuant to the Plan was equal to .24% of the Class A shares' average
daily net assets.     
   
  Under the Plan, the Fund reimburses SFSI for its expenses with respect to
Class B and Class D shares at an annual rate of up to 1% of the respective av-
erage daily net asset value of the Class B and Class D shares. Proceeds from
the Class B distribution fees are used to pay Service Organizations a continu-
ing fee of up to .25% on an annual basis of the average net asset value of
Class B shares attributable to particular Service Organizations for providing
personal service and/or the maintenance of shareholder accounts and will also
be used by SFSI to defray the expense of the payment of 4% made by it to Serv-
ice Organizations at the time of sale of Class B shares. In that connection,
SFSI has assigned FEP its interest in most of the fees payable to it in re-
spect of Class B shares, other than the portion payable to Service Organiza-
tions on a continuing basis. Proceeds from the Class D distribution fees are
used primarily to compensate Service Organizations for administration, share-
holder services and distribution assistance (including a continuing fee of up
to .25% on an annual basis of the average daily net asset value of Class D
shares attributable to particular Service Organizations for providing personal
services and/or the maintenance of shareholder accounts) and will initially be
used by SFSI to defray the expense of the payment of 1% made by it to Service
Organizations at the time of sale of Class D shares. The amounts expended by
SFSI in any one year upon the initial purchase of Class B and Class D shares
may exceed the amounts received by it from Plan payments retained. Expenses of
administration, shareholder services and distribution of Class B and Class D
shares in one fiscal year of the Fund may be paid from Class B and Class D
Plan fees, respectively, received from the Fund in any other fiscal year.     
   
  The Plan as it relates to Class B shares was approved by the Directors on
March 21, 1996 and be came effective April 22, 1996. The Plan, as it relates
to Class D shares, was approved by the Directors on March 18, 1993 and became
effective May 1, 1993. The total amount paid for the year ended December 31,
1996 by the Fund's Class B and Class D shares pursuant to the Plan was 1% per
annum of the     
 
                                      21
<PAGE>
 
   
average daily net assets of the Class B and Class D shares. The Plan is re-
viewed by the Fund's Directors annually.     
 
  Seligman Services, Inc. ("SSI"), an affiliate of the Manager, is a limited
purpose broker/dealer. SSI acts as a broker/dealer of record for most share-
holder accounts that do not have a designated broker/dealer of record including
all such shareholder accounts established after April 1, 1995 and receives com-
pensation for providing personal service and account maintenance to such ac-
counts of record.
 
EXCHANGE PRIVILEGE
 
  A shareholder of the Fund may, without charge, exchange at net asset value
any part or all of an investment in the Fund for shares of any of the other mu-
tual funds in the Seligman Group. Exchanges may be made by mail, or by tele-
phone, if the shareholder has telephone services.
 
  Class A, Class B or Class D shares may be exchanged only for Class A, Class B
or Class D shares, respectively, of another Seligman Mutual Fund on the basis
of relative net asset value.
   
  If shares that are subject to a CDSL are exchanged for shares of another
fund, for purposes of assessing the CDSL payable upon disposition of the ex-
changed shares, the applicable holding period shall be reduced by the holding
period of the original shares.     
 
  Class B shareholders of the Fund exercising the exchange privilege will con-
tinue to be subject to the Fund's CDSL schedule if such schedule is higher or
longer than the CDSL schedule of the new Class B shares. In addition, Class B
shares of the Fund acquired by exchange will be subject to the Fund's CDSL
schedule if such schedule is higher or longer than the CDSL schedule relating
to the Class B shares of the fund from which such shares were exchanged.
 
  The Seligman Mutual Funds available under the Exchange Privilege are:
 
  . SELIGMAN CAPITAL FUND, INC. seeks aggressive capital appreciation. Current
income is not an objective.
 
  . SELIGMAN CASH MANAGEMENT FUND, INC. invests in high quality money market
instruments. Shares are sold at net asset value.
 
  . SELIGMAN COMMUNICATIONS AND INFORMATION FUND, INC. invests in shares of
companies in the communications, information and related industries to produce
capital gain. Income is not an objective.
 
  . SELIGMAN FRONTIER FUND, INC. seeks to produce growth in capital value; in-
come may be considered but will only be incidental to the Fund's investment ob-
jective.
 
  . SELIGMAN GROWTH FUND, INC. seeks longer-term growth in capital value and an
increase in future income.
   
   SELIGMAN HENDERSON GLOBAL FUND SERIES, INC. consists of the Seligman Hender-
son International Fund, the Seligman Henderson Emerging Markets Growth Fund,
the Seligman Henderson Global Growth Opportunities Fund, the Seligman Henderson
Global Smaller Companies Fund and the Seligman Henderson Global Technology
Fund, which seek long-term capital appreciation primarily by investing in com-
panies either globally or internationally.     
   
  . SELIGMAN HIGH INCOME FUND SERIES consists of the Seligman U.S. Government
Securities Series and the Seligman High-Yield Bond Series which seek high cur-
rent income by investing in debt securities.     
 
  . SELIGMAN INCOME FUND, INC. seeks high current income and the possibility of
improvement of future income and capital value.
   
  . SELIGMAN MUNICIPAL FUND SERIES, INC. consists of several State Series and a
National Series. The National Municipal Series seeks to provide maximum income
exempt from regular federal income taxes; individual state series, each seeking
to maximize income exempt from regular federal income taxes and     
 
                                       22
<PAGE>
 
   
from personal income taxes in designated states, are available for Colorado,
Georgia, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Missouri,
New York, Ohio, Oregon and South Carolina. (Does not currently offer Class B
shares.)     
   
  . SELIGMAN MUNICIPAL SERIES TRUST includes the Seligman California Municipal
Quality Series, the Seligman California Municipal High-Yield Series, the Se-
ligman Florida Municipal Series and the Seligman North Carolina Municipal Se-
ries, each of which invests in municipal securities of its designated state.
(Does not currently offer Class B shares.)     
   
  . SELIGMAN NEW JERSEY MUNICIPAL FUND, INC. invests in investment grade New
Jersey municipal securities. (Does not currently offer Class B shares.)     
   
  . SELIGMAN PENNSYLVANIA MUNICIPAL FUND SERIES invests in investment grade
Pennsylvania municipal securities. (Does not currently offer Class B shares.)
       
  . SELIGMAN VALUE FUND SERIES, INC. consists of the Seligman Large-Cap Value
Fund and the Seligman Small-Cap Value Fund each of which seeks capital appre-
ciation by investing in equity securities of value companies.     
       
  All permitted exchanges will be based on the net asset values of the respec-
tive funds determined at the close of the NYSE on that day. Telephone requests
for exchanges received between 8:30 a.m. and 4:00 p.m. Eastern time, on any
business day, by Seligman Data Corp. at (800) 221-2450, will be processed as
of the close of business on that day. The registration of an account into
which an exchange is made must be identical to the registration of the account
from which shares are exchanged. When establishing a new account by an ex-
change of shares, the shares being exchanged must have a value of at least the
minimum initial investment required by the mutual fund into which the exchange
is being made. The method of receiving distributions, unless otherwise indi-
cated, will be carried over to the new fund account, as will telephone servic-
es. Account services, such as Invest-A-Check(R) Service, Directed Dividends
and Automatic Cash Withdrawal Service will not be carried over to the new fund
account unless specifically requested and permitted by the new fund. Exchange
orders may be placed to effect an exchange of a specific number of shares, an
exchange of shares equal to a specific dollar amount or an exchange of all
shares held. Shares for which certificates have been issued may not be ex-
changed via telephone and may be exchanged only upon receipt of a written ex-
change request together with certificates representing shares to be exchanged
in proper form.
 
   The Exchange Privilege via mail is generally applicable to investments in
group retirement plans, although some restrictions may apply. The terms of the
exchange offer described herein may be modified at any time; and not all of
the mutual funds in the Seligman Group are available to residents of all
states. Before making any exchange, a shareholder should contact an authorized
investment dealer or Seligman Data Corp. to obtain prospectuses of any of the
Seligman Mutual Funds.
 
  A broker/dealer representative of record will be able to effect exchanges on
behalf of a shareholder only if the shareholder has telephone services or if
the broker/dealer has entered into a Telephone Exchange Agreement with SFSI
wherein the broker/dealer must agree to indemnify SFSI and the Seligman Mutual
Funds from any loss or liability incurred as a result of the acceptance of
telephone exchange orders.
 
  Written confirmation of all exchanges will be forwarded to the shareholder
to whom the exchanged shares are registered and a duplicate confirmation will
be sent to the dealer of record listed on the account. SFSI reserves the right
to reject a telephone exchange request. Any rejected telephone exchange order
may be processed by mail. For more information about telephone exchange privi-
leges, which unless objected to, are assigned to most shareholders automati-
cally, and the circumstances under which shareholders may bear the risk of
loss for a fraudulent transaction, see "Telephone Transactions" above.
   
  Exchanges of shares are sales, and may result in a gain or loss for federal
income tax purposes.     
 
                                      23
<PAGE>
 
FURTHER INFORMATION ABOUT TRANSACTIONS IN THE FUND
 
  Because excessive trading (including short-term, "market timing" trading)
can hurt the Fund's performance, the Fund may refuse any exchange (1) from any
shareholder account from which there have been two exchanges in the preceding
three month period, or (2) where the exchanged shares equal in value the
lesser of $1,000,000 or 1% of the Fund's net assets. The Fund may also refuse
any exchange or purchase order from any shareholder account if the shareholder
or the shareholder's broker/dealer has been advised that previous patterns of
purchases and redemptions or exchanges have been considered excessive. Ac-
counts under common ownership or control, including those with the same tax-
payer ID number and those administered so as to redeem or purchase shares
based upon certain predetermined market indicators, will be considered one ac-
count for this purpose. Additionally, the Fund reserves the right to refuse
any order for the purchase of shares.
 
DIVIDENDS AND DISTRIBUTIONS
 
  The Fund's net investment income is paid to shareholders in dividends quar-
terly, usually in March, June, September and December. Payments vary in amount
depending on income received from portfolio securities and the costs of opera-
tions. The Fund distributes substantially all of any taxable net long-term and
short-term gain realized on investments to shareholders at least annually.
Such distributions will generally be taxable to shareholders in the year in
which they are declared by the Fund if paid before February 1 of the following
year.
 
  Shareholders may elect: (1) to receive both dividends and gain distributions
in shares; (2) to receive dividends in cash and gain distributions in shares;
(3) to receive both dividends and gain distributions in cash. Cash dividends
and gain distributions are paid by check. If the payment option you prefer is
not listed, contact Seligman Data Corp. at (800) 221-2450 to request informa-
tion about other available options. In the case of prototype retirement plans,
dividends and gain distributions are reinvested in additional shares. Unless
another election is made, dividends and capital gain distributions will be
credited to shareholder accounts in additional shares. Shares acquired through
a dividend or gain distribution and credited to a shareholder's account are
not subject to an initial sales load or a CDSL. Dividends and gain distribu-
tions paid in shares are invested on the payable date using the net asset
value of the ex-dividend date. Shareholders may elect to change their dividend
and gain distribution options by writing Seligman Data Corp. at the address
listed below. If the shareholder has telephone services, changes may also be
telephoned to Seligman Data Corp. between 8:30 a.m. and 6:00 p.m. Eastern
time, by either the shareholder or the broker/dealer of record on the account.
For information about telephone services, see "Telephone Transactions." These
elections must be received by Seligman Data Corp. before the record date for
the dividend or distribution in order to be effective for such dividend or
distribution.
   
  The per share dividends from net investment income on Class B and Class D
shares will be lower than the per share dividends on Class A shares as a re-
sult of the higher distribution fees applicable with respect to Class B and
Class D shares. Per share dividends of the three classes may also differ as a
result of differing class expenses. Distributions of net capital gains, if
any, will be paid in the same amount for Class A, Class B and Class D shares.
See "Purchase of Shares--Valuation."     
   
  Shareholders exchanging shares of a mutual fund for shares of another mutual
fund in the Seligman Group will continue to receive dividends and gains as
elected prior to such exchange unless otherwise specified. In the event that a
shareholder redeems, transfers or exchanges all shares in an account between
the record date and the payable date, the value of dividends or gain distribu-
tions declared will be paid in cash regardless of the existing election.     
 
                                      24
<PAGE>
 
FEDERAL INCOME TAXES
   
  The Fund intends to continue to qualify as a regulated investment company
under the Code. For each year so qualified, the Fund will not be subject to
federal income taxes on its net investment income and capital gains, if any,
realized during any taxable year, which it distributes to its shareholders,
provided that at least 90% of its net investment income and net short-term
capital gains are distributed to shareholders each year.     
 
  Dividends from net investment income and distributions from net short-term
capital gains are taxable as ordinary income to the shareholders, whether re-
ceived in cash or reinvested in additional shares, and, to the extent desig-
nated as derived from the Fund's dividend income that would be eligible for
the dividends received deduction if the Fund were not a regulated investment
company, they are eligible, subject to certain restrictions, for the 70% divi-
dends received deduction for corporations.
 
  Distributions of net capital gain, i.e., the excess of net long-term capital
gains over any net short-term losses, are taxable as long-term capital gain,
whether received in cash or invested in additional shares, regardless of how
long shares have been held by the shareholders; such distributions are not el-
igible for the dividends received deduction allowed to corporate shareholders.
 
  Any gain or loss realized upon a sale or redemption of shares in the Fund by
a shareholder who is not a dealer in securities will generally be treated as a
long-term capital gain or loss if the shares have been held for more than one
year and otherwise as a short-term capital gain or loss. However, if shares on
which a long-term capital gain distribution has been received are subsequently
sold or redeemed and such shares have been held for six months or less, any
loss realized will be treated as long-term capital loss to the extent that it
offsets the long-term capital gain distribution. In addition, no loss will be
allowed on the sale or other disposition of shares of the Fund if, within a
period beginning 30 days before the date of such sale or disposition and end-
ing 30 days after such date, the holder acquires (such as through dividend re-
investment) securities that are substantially identical to the shares of the
Fund.
 
  In determining gain or loss on shares of the Fund that are sold or exchanged
within 90 days after acquisition, a shareholder generally will not be permit-
ted to include in the tax basis attributable to such shares the sales load in-
curred in acquiring such shares to the extent of any subsequent reduction of
the sales load by reason of the Exchange or Reinstatement Privilege offered by
the Fund. Any sales load not taken into account in determining the tax basis
of shares sold or exchanged within 90 days after acquisition will be added to
the shareholder's tax basis in the shares acquired pursuant to the Exchange or
Reinstatement Privilege.
 
  The Fund will generally be subject to an excise tax of 4% on the amount of
any income or capital gains, above certain permitted levels, distributed to
shareholders on a basis such that such income or gain is not taxable to share-
holders in the calendar year in which it was earned. Furthermore, dividends
declared in October, November or December payable to shareholders of record on
a specified date in such a month and paid in the following January will be
treated as having been paid by the Fund and received by each shareholder in
December. Under this rule, therefore, shareholders may be taxed in one year on
dividends or distributions actually received in January of the following year.
   
  Shareholders are urged to consult their tax advisors concerning the effect
of federal income taxes in their individual circumstances.     
 
  UNLESS A SHAREHOLDER INCLUDES A CERTIFIED TAXPAYER IDENTIFICATION NUMBER
(SOCIAL SECURITY NUMBER FOR INDIVIDUALS) ON THE ACCOUNT APPLICATION AND CERTI-
FIES THAT THE SHAREHOLDER IS NOT SUBJECT TO BACKUP WITHHOLDING, THE FUND IS
REQUIRED TO WITHHOLD AND REMIT TO THE U.S. TREASURY A PORTION OF
 
                                      25
<PAGE>
 
DISTRIBUTIONS AND OTHER REPORTABLE PAYMENTS TO THE SHAREHOLDER. THE RATE OF
BACKUP WITHHOLDING IS 31%. SHAREHOLDERS SHOULD BE AWARE THAT, UNDER REGULA-
TIONS PROMULGATED BY THE INTERNAL REVENUE SERVICE, THE FUND MAY BE FINED $50
ANNUALLY FOR EACH ACCOUNT FOR WHICH A CERTIFIED TAXPAYER IDENTIFICATION NUMBER
IS NOT PROVIDED. IN THE EVENT THAT SUCH A FINE IS IMPOSED, THE FUND MAY CHARGE
A SERVICE FEE OF UP TO $50 WHICH MAY BE DEDUCTED FROM THE SHAREHOLDER'S AC-
COUNT AND OFFSET AGAINST ANY UNDISTRIBUTED DIVIDENDS AND CAPITAL GAIN DISTRI-
BUTIONS. THE FUND ALSO RESERVES THE RIGHT TO CLOSE ANY ACCOUNT WHICH DOES NOT
HAVE A CERTIFIED TAXPAYER IDENTIFICATION NUMBER.
 
SHAREHOLDER INFORMATION
   
  Shareholders will be sent reports semi-annually regarding the Fund. General
information about the Fund may be requested by writing the Corporate Communi-
cations/ Investor Relations Department, J. & W. Seligman & Co. Incorporated,
100 Park Avenue, New York, NY 10017 or by telephoning the Corporate
Communications/Investor Relations Department toll-free at (800) 221-7844 from
all continental United States, except New York or (212) 850-1864 in New York
State and the Greater New York City area. Information about shareholder ac-
counts may be requested by writing Shareholders Services, Seligman Data Corp.
at the same address or by toll-free telephone by dialing (800) 221-2450 from
all continental United States, or (212) 682-7600 outside the continental
United States. Seligman Data Corp. may be telephoned Monday through Friday
(except holidays), between the hours of 8:30 a.m. and 6:00 p.m. Eastern time,
and calls will be answered by a service representative.     
   
  24 HOUR TELEPHONE ACCESS IS AVAILABLE BY DIALING (800) 622-4597 ON A
TOUCHTONE PHONE, WHICH PROVIDES INSTANT ACCESS TO PRICE, YIELD, ACCOUNT BAL-
ANCE, MOST RECENT TRANSACTION AND OTHER INFORMATION. IN ADDITION, ACCOUNT
STATEMENTS, FORM 1099-DIVS CAN BE ORDERED. TO INSURE PROMPT DELIVERY OF DIS-
TRIBUTION CHECKS, ACCOUNT STATEMENTS AND OTHER INFORMATION, SELIGMAN DATA
CORP. SHOULD BE NOTIFIED IMMEDIATELY IN WRITING OF ANY ADDRESS CHANGE. ADDRESS
CHANGES MAY BE TELEPHONED TO SELIGMAN DATA CORP. IF THE SHAREHOLDER HAS
ELECTED TELEPHONE SERVICES. FOR MORE INFORMATION ABOUT TELEPHONE SERVICES, SEE
"TELEPHONE TRANSACTIONS" ABOVE.     
 
  ACCOUNT SERVICES. Shareholders are sent confirmation of financial transac-
tions in their Account.
 
  Other investor services are available. These include:
   
 . INVEST-A-CHECK(R) SERVICE enables a shareholder to authorize additional pur-
chases of shares automatically by electronic funds transfer from the share-
holder's savings or checking account, if the bank that maintains the account
is a member of the Automated Clearing House ("ACH"), or by preauthorized
checks to be drawn on the shareholder's checking account at regular monthly
intervals in fixed amounts of $100 or more per fund, or regular quarterly
intervals in fixed amounts of $250 or more per fund, to purchase shares. Ac-
counts may be established concurrently with the Invest-A-Check(R) Service only
if accompanied by a $100 minimum in conjunction with the monthly investment
option, or a $250 minimum in conjunction with the quarterly investment option.
For investments into the Seligman Time Horizon Matrix SM Asset Allocation Pro-
gram, the minimum amount is $500 at regular monthly intervals or $1,000 at
regular quarterly intervals. (See "Terms and Conditions" on page 29.)     
   
 . AUTOMATIC DOLLAR-COST-AVERAGING SERVICE permits a shareholder of Seligman
Cash Management Fund to exchange a specified amount, at regular monthly inter-
vals in fixed amounts of $100 or more per fund, or regular quarterly intervals
in fixed amounts of $250 or more per fund, from shares of any class of the
Cash Management Fund into shares of the same class of any other Seligman Mu-
tual Fund registered in the same name. For exchanges into the Seligman Time
Horizon Matrix SM Asset Allocation Pro     -
 
                                      26
<PAGE>
 
   
gram, the minimum amount is $500 at regular monthly intervals or $1,000 at
regular quarterly intervals. The shareholder's Cash Management Fund account
must have a value of at least $5,000 at the initiation of the service. Ex-
changes will be made at the public offering price.     
   
 . DIVIDENDS FROM OTHER INVESTMENTS permits a shareholder to order dividends
payable on shares of other companies to be paid to and invested in additional
shares of the Fund or another Seligman Mutual Fund. (Dividend checks must meet
or exceed the required minimum purchase amount and include the shareholder's
name, account number, the name of the Fund and the class of shares in which
the investment is to be made.)     
 
 . AUTOMATIC CD TRANSFER SERVICE permits a shareholder to instruct a bank to
invest the proceeds of a maturing bank certificate of deposit ("CD") in shares
of any designated Seligman Mutual Fund. Shareholders who wish to use this
service should contact Seligman Data Corp. or a broker to obtain the necessary
documentation. Banks may charge a penalty on CD assets withdrawn prior to ma-
turity. Accordingly, it will not normally be advisable to liquidate a CD be-
fore its maturity.
   
 . AUTOMATIC CASH WITHDRAWAL SERVICE permits payments at regular intervals to
be made to a shareholder who owns or purchases shares worth $5,000 or more
held as book credits. Holders of Class A shares purchased at net asset value
because the purchase amount was $1,000,000 or more should bear in mind that
withdrawals may be subject to a 1% CDSL if made within eighteen months of pur-
chase of such shares. Holders of Class B shares may elect to use this service
immediately, although certain withdrawals may be subject to a CDSL. Holders of
Class D shares may elect to use this service with respect to shares that have
been held for at least one year. (See "Terms and Conditions" on page 29.)     
 
 . DIRECTED DIVIDENDS allows a shareholder to pay dividends to another person
or to direct the payment of such dividends to another Seligman Mutual Fund for
purchase at net asset value. Dividends on Class A, Class B and Class D shares
may only be directed to shares of the same class of another Seligman Mutual
Fund.
   
 . OVERNIGHT DELIVERY to service shareholder requests is available for a $15.00
fee which will be deducted from a shareholder's account, if requested.     
 
 . COPIES OF ACCOUNT STATEMENTS will be sent to each shareholder free of charge
for the current year and most recent prior year. Copies of year-end statements
for prior years back to 1970 are available for a fee of $10.00 per year, per
account, with a maximum charge of $150 per account. Statement requests should
be forwarded, along with a check, to Seligman Data Corp.
   
  TAX-DEFERRED RETIREMENT PLANS. Shares of the Fund may be purchased for:     
 
  --Individual Retirement Accounts (IRAs);
   
  --Savings Incentive Match Plans for Employees (SIMPLE IRAs);     
 
  --Simplified Employee Pension Plans (SEPs);
 
  --Section 401(k) Plans for corporations and their employees;
 
  --Section 403(b)(7) Plans for employees of public school systems and certain
non-profit organizations who wish to make deferred compensation arrangements;
and
   
  --Money Purchase Pension and Profit Sharing Plans for sole proprietorships,
corporations and partnerships.     
 
  These types of plans may be established only upon receipt of a written ap-
plication form. The Fund may register an IRA investment for which an account
application has not been received as an ordinary taxable account.
 
  For more information, write Retirement Plan Services, Seligman Data Corp.,
100 Park Avenue, New York, NY 10017 or telephone toll-free (800) 445-1777 from
all continental United States. You also may receive information through an au-
thorized dealer.
 
                                      27
<PAGE>
 
ADVERTISING THE FUND'S PERFORMANCE
 
  From time to time the Fund advertises its "total return" and "average annual
total return," each of which are calculated separately for Class A, Class B
and Class D shares. THESE FIGURES ARE BASED ON HISTORICAL EARNINGS AND ARE NOT
INTENDED TO INDICATE FUTURE PERFORMANCE. The "total return" shows what an in-
vestment in shares of Class A, Class B and Class D of the Fund would have
earned over a specified period of time (for example, one, five and ten-year
periods or since inception) assuming the payment of the maximum sales load, if
any (or CDSL upon redemption, if applicable), when the investment was made and
that all distributions and dividends paid by the Fund were reinvested on the
reinvestment dates during the period. The "average annual total return" is the
annual rate required for the initial payment to grow to the amount which would
be received at the end of the specified period (one, five and ten-year periods
or since inception); i.e., the average annual compound rate of return. The to-
tal return and average annual total return of Class A shares quoted from time
to time through December 31, 1992 have not been adjusted to reflect the deduc-
tion of the administration, shareholder services and distribution fee and
through April 10, 1991 also have not been adjusted to reflect the increase in
the management fee approved by shareholders on April 10, 1991, which fees if
reflected would reduce the performance quoted. The total return and average
annual total return quoted from time to time for Class A and Class D shares
for periods prior to January 1, 1996 do not reflect the increase in the man-
agement fee payable by the Fund effective on such date, which if reflected
would reduce the performance quoted. Total return and average annual total re-
turn may also be presented without the effect of the initial sales load or
CDSL, as applicable.
 
  From time to time, reference may be made in advertising or promotional mate-
rial to performance information, including mutual fund rankings, prepared by
Lipper Analytical Service, Inc. ("Lipper"), an independent reporting service
which monitors the performance of mutual funds. In calculating the total re-
turn of the Fund's Class A, Class B and Class D shares, the Lipper analysis
assumes investment of all dividends and distributions paid but does not take
into account applicable sales loads. The Fund may also refer in advertisements
or in other promotional material to articles, comments, listings and columns
in the financial press pertaining to the Fund's performance. Examples of such
financial and other press publications include Barron's, Business Week,
CDA/Weisenberger Mutual Funds Investment Report, Christian Science Monitor,
Financial Planning, Financial Times, Financial World, Forbes, Fortune, Indi-
vidual Investor, Investment Advisor, Investors Business Daily, Kiplinger's,
Los Angeles Times, MONEY Magazine, Morningstar, Inc., Pensions and Invest-
ments, Smart Money, The New York Times, USA Today, U.S. News and World Report,
The Wall Street Journal, Washington Post, Worth Magazine and Your Money.
 
ORGANIZATION AND CAPITALIZATION
 
  The Fund is an open-end diversified management investment company incorpo-
rated under the laws of the State of Maryland in 1930. The Fund is authorized
to issue 500,000,000 shares of common stock, each with a par value of $0.50,
divided into three classes. Each share of the Fund's Class A, Class B and
Class D common stock is equal as to earnings, assets and voting privileges,
except that each class bears its own separate distribution and, potentially,
certain other class expenses and has exclusive voting rights with respect to
any matter to which a separate vote of any class is required by the 1940 Act
or Maryland law. The Fund has adopted a Plan (the "Multiclass Plan") pursuant
to Rule 18f-3 under the 1940 Act permitting the issuance and sale of multiple
classes of common stock. In accordance with the Articles of Incorporation, the
Board of Direc-tors may authorize the creation of additional classes of common
stock with such characteristics as are permitted by the Multiclass Plan and
Rule 18f-3. The 1940 Act requires that where more than one class exists, each
class must be preferred over all other classes in respect of assets specifi-
cally allocated to such class. Shares have non-cumulative voting rights, do
not have preemptive or subscription rights and are transferable.
 
                                      28
<PAGE>
 
                              TERMS AND CONDITIONS
 
                          GENERAL ACCOUNT INFORMATION
   
  Investments will be made in as many shares, including fractions to the third
decimal place, as can be purchased at the net asset value plus a sales load, if
applicable, at the close of business on the day payment is received. If a check
in payment of a purchase of shares is dishonored for any reason, Seligman Data
Corp. will cancel the purchase and may redeem additional shares, if any, held
in the shareholder's account in an amount sufficient to reimburse the Fund for
any loss it may have incurred and charge a $10.00 return check fee. Sharehold-
ers will receive dividends from investment income and any distributions from
gain realized on investments in shares or in cash according to the option
elected. Dividend and gain options may be changed by notifying Seligman Data
Corp. These option changes must be received by Seligman Data Corp. before the
record date for the dividend or distribution in order to be effective for such
dividend or distribution. Stock certificates will not be issued, unless re-
quested. Replacement stock certificates will be subject to a surety fee.     
 
                           INVEST-A-CHECK(R) SERVICE
   
  The Invest-A-Check(R) Service is available to all shareholders. The applica-
tion is subject to acceptance by the shareholder's bank and Seligman Data Corp.
The electronic funds transfer ("ACH debit") or preauthorized check in the
amount specified will be drawn automatically on the shareholder's bank on the
fifth day (unless otherwise specified) of each month (or on the prior business
day if such day of the month falls on a weekend or holiday) in which an invest-
ment is scheduled and invested price at the close of business on the same date.
After the initial investment, the value of shares held in a shareholder's ac-
count must equal not less than two regularly scheduled investments. If an ACH
debit or preauthorized check is not honored by the shareholder's bank, or if
the value of shares held falls below the required minimum, the Invest-A-
Check(R) Service may be suspended. In the event that a check or ACH debit is
returned uncollectable, Seligman Data Corp. will cancel the purchase, redeem
shares held in the shareholder's account for an amount sufficient to reimburse
the Fund for any loss it may have incurred as a result, and charge a $10.00 re-
turn check fee. This fee will be deducted to the shareholder's account. The In-
vest-A-Check(R) Service may be reinstated upon written request indicating that
the cause of interruption has been corrected. The Invest-A-Check(R) Service may
be terminated by the shareholder or Seligman Data Corp. at any time by written
notice. The shareholder agrees to hold the Fund and its agents free from all
liability which may result from acts done in good faith and pursuant to these
terms. Instructions for establishing Invest-A-Check(R) Service are given on the
Account Application. In the event a shareholder exchanges all of the shares
from one mutual fund in the Seligman Group to another, the Invest-A-Check(R)
Service will be terminated in the Seligman Mutual Fund that was closed as a re-
sult of the exchange of all shares and the shareholder must re-apply for the
Invest-A-Check(R) Service in the Seligman Mutual Fund into which the exchange
was made. In the event of a partial exchange, the Invest-A-Check(R) Service
will be continued, subject to the above conditions, in the Seligman Mutual Fund
from which the exchange was made. Accounts established in connection with the
Invest-A-Check(R) Service must be accompanied by a minimum initial investment
of at least $100 in connection with the monthly investment option or $250 in
connection with the quarterly investment option. If a shareholder uses the In-
vest-A-Check(R) Service to make an IRA investment, the purchase will be cred-
ited as a current year contribution. If a shareholder uses the Invest-A-
Check(R) Service to make an investment in a pension or profit sharing plan, the
purchase will be credited as a current year employer contribution.     
 
                       AUTOMATIC CASH WITHDRAWAL SERVICE
   
  The Automatic Cash Withdrawal Service is available to Class A shareholders,
to Class B shareholders and to Class D shareholders with respect to Class D
shares held for one year or more. A sufficient number of full and fractional
shares will be redeemed to provide the amount required for a scheduled payment
and any applicable CDSL. Redemptions will be made at the asset value at the
close of business on the specific day designated by the shareholder of each
month (or on the prior business day if the day specified falls on a weekend or
holiday), less, in the case of Class B shares, any applicable CDSL. Automatic
withdrawals of Class A shares which were purchased at net asset value because
the purchase amount was $1,000,000 or more will be subject to a CDSL if made
within eighteen months of purchase of such shares. Under this Service, a Class
B shareholder who requests both dividends and distributions in additional
shares may withdraw up to 12% of the value of the Shareholder's fund account
(at the time of election) per annum, without the imposition of a CDSL.A share-
holder may change the amount of scheduled payments or may suspend payments by
written notice to Seligman Data Corp. at least ten days prior to the effective
date of such a change or suspension. Service may be terminated by the share-
holder or Seligman Data Corp. at any time by written notice. It will be termi-
nated upon proper notification of the death or legal incapacity of the share-
holder. This Service is considered terminated in the event a withdrawal of
shares, other than to make scheduled withdrawal payments, reduces the value of
shares remaining on deposit to less than $5,000. Continued payments in excess
of dividend income invested will reduce and ultimately exhaust capital. With-
drawals, concurrent with purchases of shares of this or any other investment
company, will be disadvantageous because of the payment of duplicative sales
loads, if applicable. For this reason, additional purchases of Fund shares are
discouraged when the Withdrawal Service is in effect.     
 
                     LETTER OF INTENT--CLASS A SHARES ONLY
   
  Seligman Financial Services, Inc. will hold in escrow shares equal to 5% of
the minimum purchase amount specified. Dividends and distributions on the
escrowed shares will be paid to the shareholder or credited to their account.
Upon completion of the specified minimum purchase within the thirteen-month pe-
riod, all shares held in escrow will be deposited into the shareholder's ac-
count or delivered to the shareholder. A shareholder may include toward comple-
tion of a Letter of Intent the total asset value of shares of the Seligman Mu-
tual Funds on which an initial sales load was paid as of the date of the Let-
ter. If the total amount invested within the thirteen-month period does not
equal or exceed the specified minimum purchase, a shareholder will be requested
to pay the difference between the amount of the sales load paid and the amount
of the sales load applicable to the total purchase made. If, within 20 days
following the mailing of a written request, a shareholder has not paid this ad-
ditional sales load to Seligman Financial Services, Inc. sufficient escrowed
shares will be redeemed for payment of the additional sales load. Shares re-
maining in escrow after this payment will be released to the account. The in-
tended purchase amount may be increased at any time during the thirteen-month
period by filing a revised Agreement for the same period, provided that the
Dealer furnishes evidence that an amount representing the reduction in sales
load under the new Agreement, which becomes applicable on purchases already
made under the original Agreement, will be refunded to the Fund and that the
required additional escrowed shares will be purchased by the shareholder.     
   
  Shares of Seligman Cash Management Fund, Inc. which have been acquired by an
exchange of shares of another Seligman Mutual Fund on which there is an initial
sales load may be taken into account in completing a Letter of Intent, or for
Right of Accumulation. However, shares of the Seligman Cash Management Fund
which have been purchased directly may not be used for purposes of determining
reduced sales loads on additional purchases of the other Seligman Mutual Funds.
                                                                          
                                                                       5/97     
 
                                       29
<PAGE>
 
SELIGMAN 

COMMON 

STOCK 

FUND, INC.

100 Park Avenue
New York, New York 10017


INVESTMENT MANAGER
J. & W. Seligman & Co. Incorporated 
100 Park Avenue 
New York, New York 10017


GENERAL DISTRIBUTOR
Seligman Financial Services, Inc. 
100 Park Avenue 
New York, New York 10017


SHAREHOLDER SERVICE AGENT
Seligman Data Corp.
100 Park Avenue
New York, New York 10017


PORTFOLIO SECURITIES CUSTODIAN
Investors Fiduciary Trust Company
127 West 10th Street
Kansas City, Missouri 64105

GENERAL COUNSEL
Sullivan & Cromwell
125 Broad Street
New York, New York 10004

- ------------------------------------
Prospectus

Seligman Common Stock Fund, Inc.

May 1, 1997

[LOGO]
- ------------------------------------
A Growth Stock Fund 
In Its 68th Year


EQGR1 5/97
<PAGE>
 
                   STATEMENT OF ADDITIONAL INFORMATION
                                  May 1, 1997       
                        SELIGMAN COMMON STOCK FUND, INC.

                                100 Park Avenue
                           New York, New York  10017
                     New York City Telephone (212) 850-1864
        Toll Free Telephone (800) 221-2450 all continental United States
      For Retirement Plan Information - Toll Free Telephone (800) 445-1777

    
     This Statement of Additional Information expands upon and supplements the
information contained in the current Prospectus of Seligman Common Stock Fund,
Inc., (the "Fund") dated May 1, 1997.  It should be read in conjunction with the
Prospectus, which may be obtained by writing or calling the Fund at the above
address or telephone numbers.  This Statement of Additional Information,
although not in itself a Prospectus, is incorporated by reference into the
Prospectus in its entirety.

     The Fund offers three classes of shares.  Class A shares may be purchased
at net asset value plus a sales load of up to 4.75%.  Class A shares purchased
in an amount of $1,000,000 or more are sold without an initial sales load but
are subject to a contingent deferred sales load ("CDSL") of 1% (of the current
net asset value or original purchase price, whichever is less) if such shares
are redeemed within eighteen months of purchase.  Class B shares may be
purchased at net asset value and are subject to a CDSL, if applicable, in the
following amount (as a percentage of the current net asset value of the original
purchase price, whichever is less), if redemption occurs within the indicated
number of years of purchase of such shares: 5% (less than one year), 4% (1 but
less than 2 years), 3% (2 but less than 4 years), 2% (4 but less than 5 years)
1% (5 but less than six years) and 0% (6 or more years).  Class B shares
automatically convert to Class A shares after approximately eight years,
resulting in lower ongoing fees.  Shares purchased through reinvestment of
dividends and distributions on Class B shares also will convert automatically to
Class A shares along with the underlying shares on which they were earned.
Class D shares may be purchased at net asset value and are subject to a CDSL of
1% (of the current net asset value or the original purchase price, whichever is
less) if redeemed within one year of purchase.

     Each Class A, Class B and Class D share represents an identical legal
interest in the investment portfolio of the Fund and has the same rights except
for certain class expenses and except that Class B and Class D shares bear
higher ongoing fees that generally will cause the Class B and Class D shares to
have higher expense ratios and pay lower dividends than Class A shares.  Each
Class has exclusive voting rights with respect to its distribution plan.
Although holders of Class A, Class B and Class D shares have identical legal
rights, the different expenses borne by each Class will result in different net
asset values and dividends.  The three classes also have different exchange
privileges.

                                 TABLE OF CONTENTS
<TABLE>
<CAPTION>
 
 
                                             Page
<S>                                          <C>
Investment Objectives, Policies and Risks..     2
Investment Limitations.....................     4
Directors and Officers.....................     5
Management and Expenses....................     9
Administration, Shareholder Services and
   Distribution Plan.......................    11
Portfolio Transactions.....................    11
 
 

 
                                             Page
Purchase and Redemption of Fund Shares.....    12
Distribution Services......................    14
Valuation..................................    15
Performance................................    16
General Information........................    17
Financial Statements.......................    18
Appendix...................................    19
</TABLE>

     
EQFR1A

                                      -1-
<PAGE>
 
                   INVESTMENT OBJECTIVES, POLICIES AND RISKS

  The Fund seeks to produce favorable, but not the highest, current income and
long-term growth of both income and capital value without exposing capital to
undue risk.  The following information regarding the Fund's investment policies
supplements the information contained in the Prospectus.

LENDING OF PORTFOLIO SECURITIES.  The Fund may lend portfolio securities to
certain institutional borrowers of securities and may invest the cash collateral
and obtain additional income or receive an agreed upon amount of interest from
the borrower.  Loans are subject to termination at the option of the Fund or the
borrower.  The Fund may pay reasonable administrative and custodial fees in
connection with a loan and may pay a negotiated portion of the interest earned
on the cash or equivalent collateral to the borrower or placing broker.  The
Fund does not have the right to vote securities on loan, but would terminate the
loan and regain the right to vote if that were considered important with respect
to the investment.

RIGHTS AND WARRANTS.  The Fund may invest in common stock rights and warrants
- --------------------                                                         
believed by the Manager to provide capital appreciation opportunities.  Common
stock rights and warrants received as part of a unit or attached to securities
purchased (i.e., not separately purchased) are not included in the Fund's
investment restrictions regarding such securities.

  The Fund may not invest in rights and warrants if, at the time of acquisition,
the investment in rights and warrants would exceed 5% of the Fund's net assets,
valued at the lower of cost or market.  In addition, no more than 2% of net
assets may be invested in warrants not listed on the New York or American Stock
Exchanges.  For purposes of this restriction, rights and warrants acquired by
the Fund in units or attached to securities may be deemed to have been purchased
without cost.

FOREIGN CURRENCY TRANSACTIONS.  A forward foreign currency exchange contract is
an agreement to purchase or sell a specific currency at a future date and at a
price set at the time the contract is entered into.  The Fund will generally
enter into forward foreign currency exchange contracts to fix the U.S. dollar
value of a security it has agreed to buy or sell for the period between the date
the trade was entered into and the date the security is delivered and paid for,
or, to hedge the U.S. dollar value of securities it owns.

  The Fund may enter into a forward contract to sell or buy the amount of a
foreign currency it believes may experience a substantial movement against the
U.S. dollar.  In this case the contract would approximate the value of some or
all of the Fund's portfolio securities denominated in such foreign currency.
Under normal circumstances, the portfolio manager will limit forward currency
contracts to not greater than 75% of the Fund's portfolio position in any one
country as of the date the contract is entered into.  This limitation will be
measured at the point the hedging transaction is entered into by the Fund.
Under extraordinary circumstances, the Subadviser may enter into forward
currency contracts in excess of 75% of the Fund's portfolio position in any one
country as of the date the contract is entered into.  The precise matching of
the forward contract amounts and the value of securities involved will not
generally be possible since the future value of such securities in foreign
currencies will change as a consequence of market involvement in the value of
those securities between the date the forward contract is entered into and the
date it matures.  The projection of short-term currency market movement is
extremely difficult, and the successful execution of a short-term hedging
strategy is highly uncertain.  Under certain circumstances, the Fund may commit
up to the entire value of its assets which are denominated in foreign currencies
to the consummation of these contracts.  The Subadviser will consider the effect
a substantial commitment of its assets to forward contracts would have on the
investment program of the Fund and its ability to purchase additional
securities.

  Except as set forth above and immediately below, the Fund will also not enter
into such forward contracts or maintain a net exposure to such contracts where
the consummation of the contracts would oblige the Fund to deliver an amount of
foreign currency in excess of the value of the Fund's portfolio securities or
other assets denominated in that currency.  The Fund, in order to avoid excess
transactions and transaction costs, may nonetheless maintain a net exposure to
forward contracts in excess of the value of the Fund's portfolio securities or
other assets denominated in that currency provided the excess amount is
"covered" by cash or liquid, high-grade debt securities, denominated in any
currency, at least equal at all times to the amount of such excess.  Under
normal circumstances, consideration of the prospect for currency parties will be
incorporated into the longer term investment decisions made with regard to
overall diversification strategies.  However, the Subadviser believes that it is
important to have the flexibility to enter into such forward contracts when it
determines that the best interests of the Fund will be served.

                                      -2-
<PAGE>
 
  At the maturity of a forward contract, the Fund may either sell the portfolio
security and make delivery of the foreign currency, or it may retain the
security and terminate its contractual obligation to deliver the foreign
currency by purchasing an "offsetting" contract obligating it to purchase, on
the same maturity date, the same amount of the foreign currency.

  As indicated above, it is impossible to forecast with absolute precision the
market value of portfolio securities at the expiration of the forward contract.
Accordingly, it may be necessary for the Fund to purchase additional foreign
currency on the spot market (and bear the expense of such purchase) if the
market value of the security is less than the amount of foreign currency the
Fund is obligated to deliver and if a decision is made to sell the security and
make delivery of the foreign currency.  Conversely, it may be necessary to sell
on the spot market some of the foreign currency received upon the sale of the
portfolio security if its market value exceeds the amount of foreign currency
the Fund is obligated to deliver.  However, the Fund may use liquid, high-grade
debt securities, denominated in any currency, to cover the amount by which the
value of a forward contract exceeds the value of the securities to which it
relates.

  If the Fund retains the portfolio security and engages in offsetting
transactions, the Fund will incur a gain or a loss (as described below) to the
extent that there has been movement in forward contract prices.  If the Fund
engages in an offsetting transaction, it may subsequently enter into a new
forward contract to sell the foreign currency.  Should forward prices decline
during the period between the Fund's entering into a forward contract for the
sale of a foreign currency and the date it enters into an offsetting contract
for the purchase of the foreign currency, the Fund will realize a gain to the
extent the price of the currency it has agreed to sell exceeds the price of the
currency it has agreed to purchase.  Should forward prices increase, the Fund
will suffer a loss to the extent the price of the currency it has agreed to
purchase exceeds the price of the currency it has agreed to sell.

  The Fund's dealing in forward foreign currency exchange contracts will be
limited to the transactions described above.  Of course, the Fund is not
required to enter into forward contracts with regard to its foreign currency-
denominated securities and will not do so unless deemed appropriate by the
Subadviser.  It also should be realized that this method of hedging against a
decline in the value of a currency does not eliminate fluctuations in the
underlying prices of the securities.  It simply establishes a rate of exchange
at a future date.  Additionally, although such contracts tend to minimize the
risk of loss due to a decline in the value of a hedged currency, at the same
time, they tend to limit any potential gain which might result from an increase
in the value of that currency.

  Shareholders should be aware of the costs of currency conversion.  Although
foreign exchange dealers do not charge a fee for conversion, they do realize a
profit based on the difference (the "spread") between the prices at which they
are buying and selling various currencies.  Thus, a dealer may offer to sell a
foreign currency to the Fund at one rate, while offering a lesser rate of
exchange should the Fund desire to resell that currency to the dealer.

  Investment income received by the Fund from sources within foreign countries
may be subject to foreign income taxes withheld at the source.  The United
States has entered into tax treaties with many foreign countries which entitle
the Fund to a reduced rate of such taxes or exemption from taxes on such income.
It is impossible to determine the effective rate of foreign tax in advance since
the amounts of the Fund's assets to be invested within various countries is not
known.

REPURCHASE AGREEMENTS.  The Fund may enter into repurchase agreements with
- ---------------------                                                     
commercial banks and with broker/dealers to invest cash for the short-term.  A
repurchase agreement is an agreement under which the Fund acquires a money
market instrument, generally a U.S. Government obligation, subject to resale at
an agreed upon price and date.  Such resale price reflects an agreed upon
interest rate effective for the period of time the instrument is held by the
Fund and is unrelated to the interest rate on the instrument.  Repurchase
agreements could involve certain risks in the event of bankruptcy or other
default by the seller, including possible delays and expenses in liquidating the
securities underlying the agreement, decline in value of the underlying
securities and loss of interest.  Repurchase agreements usually are for short
periods, such as one week or less, but may be for longer periods.  However, as a
matter of fundamental policy, the Fund will not enter into repurchase agreements
of more than one week's duration if more than 10% of its net assets would be so
invested.  The Fund to date has not entered into any repurchase agreements and
has no present intention of doing so in the future.
    
  Except as indicated above or as described under "Investment Limitations"
below, the foregoing investment policies are not fundamental and the Board of
Directors of the Fund may change such policies without the vote of a majority of
its outstanding voting securities (as defined on page 5).          

                                      -3-
<PAGE>
 
PORTFOLIO TURNOVER.  The Fund's portfolio turnover rate is calculated by
- ------------------                                                      
dividing the lesser of purchases or sales of portfolio securities for the fiscal
year by the monthly average value of the portfolio securities owned during the
fiscal year.  Securities with remaining maturities of one year or less at the
date of acquisition are excluded from the calculation.
    
  The Fund's portfolio turnover rates for the year ended December 31, 1996 and
1995 were 56.10% and 46.08% , respectively.
     
                                 INVESTMENT LIMITATIONS

  Under the Fund's fundamental policies, which cannot be changed except by vote
of a majority of its outstanding voting securities, the Fund may not:

 .  Borrow money, except for temporary or emergency purposes in an amount not to
   exceed 15% of the value of its total assets;
    
 .  Mortgage or pledge any of its assets, except to the extent necessary to
   effect permitted borrowings on a secured basis and except to enter into
   escrow arrangements in connection with the sales of permitted call options.
   The Fund has no present intention of selling call options, and will no do so
   without the prior approval of the Fund's Board of Directors;
     
 .  Purchase securities (other than closing call options) except for investment,
   buy on "margin," or sell "short." The Fund has no present intention of
   investing in these types of securities, and will not do so without the prior
   approval of the Fund's Board of Directors;

 .  Invest more than 5% of the value of its total assets, at market value, in
   securities of any company which, with their predecessors, have been in
   operation less than three continuous years, provided, however, that
   securities guaranteed by a company that (including predecessors) has been in
   operation at least three continuous years shall be excluded from this
   calculation;

 .  Invest more than 5% of its total assets (taken at market) in securities of
   any one issuer, other than the U.S. Government, its agencies or
   instrumentalities, buy more than 10% of the outstanding voting securities or
   more than 10% of all the securities of any issuer, or invest to control or
   manage any company;

 .  Invest more than 25% of total assets at market value in any one industry;
    
 .  Invest in securities issued by other investment companies, except in
   connection with a merger, consolidation, acquisition or reorganization;*
     
 .  Purchase or hold any real estate, except the Fund may invest in securities
   secured by real estate or interests therein or issued by persons (including
   real estate investment trusts) which deal in real estate or interests
   therein;

 .  Purchase or hold the securities of any issuer, if to its knowledge, directors
   or officers of the Fund individually owning beneficially more than 0.5% of
   the securities of that other company own in the aggregate more than 5% of
   such securities;

 .  Deal with its directors or officers, or firms they are associated with, in
   the purchase or sale of securities of other issuers, except as broker; 

 .  Purchase or sell commodities and commodity contracts; 

 .  Underwrite the securities of other issuers, except insofar as the Fund may be
   deemed an underwriter under the Securities Act of 1933, as amended, in
   disposing of a portfolio security;

- --------------------
    
* The Fund has applied for, and expects to receive, an exemptive order from the
Securities and Exchange Commission that would permit it to purchase shares of
other investment companies advised by the Manager for the limited purpose of
hedging its obligations in connection with the deferred fee arrangement for
outside directors referred to under "Directors and Officers" below.       

                                      -4-
<PAGE>
 
 .  Make loans, except loans of portfolio securities and except to the extent the
   purchase of notes, bonds or other evidences of indebtedness, the entry into
   repurchase agreements or deposits with banks may be considered loans; or
    
 .  Write or purchase put, call, straddle or spread options except that the Fund
   may sell covered call options listed on a national securities exchange or
   quoted on NASDAQ and purchase closing call options so listed or quoted. The
   Fund has no present intention of entering into these types of transactions,
   and will not do so without the prior approval of the Fund's Board of
   Directors.      
         
  Under the Investment Company Act of 1940 (the "1940 Act") a "vote of a
majority of the outstanding voting securities" of the Fund means the affirmative
vote of the lesser of (l) more than 50% of the outstanding shares of the Fund or
(2) 67% or more of the shares present at a shareholders' meeting if more than
50% of the outstanding shares are represented at the meeting in person or by
proxy.

                                 DIRECTORS AND OFFICERS

  Directors and officers of the Fund, together with information as to their
principal business occupations during the past five years, are shown below.
Each Director who is an "interested person" of the Fund, as defined in the 1940
Act, is indicated by an asterisk.  Unless otherwise indicated, their addresses
are 100 Park Avenue, New York, NY  10017.
    
WILLIAM C. MORRIS* Director, Chairman of the Board, Chief Executive Officer and
 (59)              Chairman of the Executive Committee

                   Chairman, J. & W. Seligman & Co. Incorporated, investment
                   managers and advisers; and Seligman Advisors Inc., advisers;
                   Chairman and Chief Executive Officer, the Seligman Group of
                   Investment Companies; Chairman, Seligman Financial Services,
                   Inc., broker/dealer; Seligman Holdings, Inc., holding
                   company; Seligman Services, Inc., broker/dealer; and Carbo
                   Ceramics Inc., ceramic proppants for oil and gas industry;
                   Director or Trustee, Seligman Data Corp., shareholder service
                   agent; Kerr-McGee Corporation, diversified energy company;
                   and Sarah Lawrence College; and a Member of the Board of
                   Governors of the Investment Company Institute; formerly,
                   President, J. & W. Seligman & Co. Incorporated; Chairman,
                   Seligman Securities, Inc., broker/dealer; and J. & W.
                   Seligman Trust Company, trust company; and Director Daniel
                   Industries Inc., manufacturer of oil and gas metering
                   equipment.

BRIAN T. ZINO*     Director, President and Member of the Executive Committee
 (44)
                   Director and President, J. & W. Seligman & Co. Incorporated,
                   investment managers and advisers; President, (with the
                   exception of Seligman Quality Municipal Fund, Inc. and
                   Seligman Select Municipal Fund, Inc.) and Director or
                   Trustee, the Seligman Group of Investment Companies; and
                   Seligman Advisors, Inc., advisers; Chairman and President,
                   Seligman Data Corp., shareholder service agent; and Director,
                   Seligman Financial Services, Inc., broker/dealer; Seligman
                   Services, Inc., broker/dealer; and Seligman Henderson Co.,
                   advisers; formerly, Director, Seligman Securities, Inc.,
                   broker/dealer; and J. & W. Seligman Trust Company, trust
                   company.
     

                                      -5-
<PAGE>
 
    
JOHN R. GALVIN     Director
 (67)
                   Dean, Fletcher School of Law and Diplomacy at Tufts
                   University; Director or Trustee, the Seligman Group of
                   Investment Companies; Chairman, American Council on Germany;
                   a Governor of the Center for Creative Leadership; Director,
                   USLIFE Corporation, life insurance; National Committee on
                   U.S.-China Relations, National Defense University; the
                   Institute for Defense Analysis; and Raytheon Co.,
                   electronics; and Consultant, Thomson CSF, electronics;
                   formerly, Ambassador, U.S. State Department; Distinguished
                   Policy Analyst at Ohio State University and Olin
                   Distinguished Professor of National Security Studies at the
                   United States Military Academy.  From June, 1987 to June,
                   1992, he was the Supreme Allied Commander, Europe and the
                   Commander-in-Chief, United States European Command.

                   Tufts University, Packard Avenue, Medford, MA  02155

ALICE S. ILCHMAN   Director
 (62)
                   President, Sarah Lawrence College; Director or Trustee, the
                   Seligman Group of Investment Companies; Chairman, The
                   Rockefeller Foundation, charitable foundation; and Director,
                   NYNEX, telephone company; and the Committee for Economic
                   Development; formerly, Trustee, The Markle Foundation,
                   philanthropic organization; and Director, International
                   Research and Exchange Board, intellectual exchanges.

                   Sarah Lawrence College, Bronxville, NY  10708

FRANK A. McPHERSON Director
 (64)
                   Director, various corporations; Director or Trustee, the
                   Seligman Group of Investment Companies; Kimberly-Clark
                   Corporation, consumer products, Bank of Oklahoma Holding
                   Company, American Petroleum Institute, Oklahoma City Chamber
                   of Commerce, Baptist Medical Center, Oklahoma Chapter of the
                   Nature Conservancy, Oklahoma Medical Research Foundation and
                   United Way Advisory Board; Chairman, Oklahoma City Public
                   Schools Foundation; and Member of the Business Roundtable and
                   National Petroleum Council; formerly, Chairman of the Board
                   and Chief Executive Officer, Kerr-McGee Corporation, energy
                   and chemicals.
                   123 Robert S. Kerr Avenue, Oklahoma City, OK  73102

JOHN E. MEROW*     Director
 (67)
                   Retired Chairman and Senior Partner, Sullivan & Cromwell, law
                   firm; Director or Trustee, the Seligman Group of Investment
                   Companies; Municipal Art Society of New York; Commonwealth
                   Aluminum Corporation; the U. S. Council for International
                   Business and the U.S.-New Zealand Council; Chairman, American
                   Australian Association; and the Municipal Art Society of New
                   York; Member of the American Law Institute and Council on
                   Foreign Relations; and Member of the Board of Governors of
                   the Foreign Policy Association and The New York Hospital.
                   125 Broad Street, New York, NY  10004

BETSY S. MICHEL    Director
 (54)
                   Attorney; Director or Trustee, the Seligman Group of
                   Investment Companies; Trustee, Geraldine R. Dodge Foundation,
                   charitable foundation; and Chairman of the Board of Trustees
                   of St. George's School (Newport, RI); formerly, Director, the
                   National Association of Independent Schools (Washington, DC).
                   St. Bernard's Road, P.O. Box 449, Gladstone, NJ  07934
     

                                      -6-
<PAGE>
 
    
JAMES C. PITNEY    Director
 (70)
                   Partner, Pitney, Hardin, Kipp & Szuch, law firm; Director or
                   Trustee, the Seligman Group of Investment Companies; and
                   Public Service Enterprise Group, public utility.
                   Park Avenue at Morris County, P.O. Box 1945, Morristown, NJ
                   07962-1945

JAMES Q. RIORDAN   Director
 (69)
                   Director, various corporations; Director or Trustee, the
                   Seligman Group of Investment Companies; The Houston
                   Exploration Company; The Brooklyn Museum; The Brooklyn Union
                   Gas Company; the Committee for Economic Development; Dow
                   Jones & Co., Inc.; and Public Broadcasting Service; formerly,
                   Co-Chairman of the Policy Council of the Tax Foundation;
                   Director and Chairman, Mobil Corporation; Director, Tesoro
                   Petroleum Companies, Inc.; and Director and President,
                   Bekaert Corporation.
                   675 Third Avenue, Suite 3004, New York, NY  10017

RONALD T. SCHROEDER*  Director  and Member of the Executive Committee
 (49)
                   Director, Managing Director and Chief Investment Officer,
                   Institutional, J. & W. Seligman & Co. Incorporated,
                   investment managers and advisers; and Seligman Advisors,
                   Inc., advisers; Director or Trustee, the Seligman Group of
                   Investment Companies; Director, Seligman Holdings, Inc.,
                   holding company; Seligman Financial Services, Inc.,
                   broker/dealer; and Seligman Services, Inc., broker/dealer;
                   formerly, President, the Seligman Group of Investment
                   Companies, except Seligman Quality Municipal Fund, Inc. and
                   Seligman Select Municipal Fund, Inc.; and Director, Seligman
                   Data Corp., shareholder service agent; Seligman Henderson
                   Co., advisers; J. & W. Seligman Trust Company, trust company;
                   and Seligman Securities, Inc., broker/dealer.

ROBERT L. SHAFER   Director
 (64)
                   Director, various corporations; Director or Trustee, the
                   Seligman Group of Investment Companies and USLIFE
                   Corporation, life insurance; formerly, Vice President, Pfizer
                   Inc., pharmaceuticals.
                   235 East 42nd Street, New York, NY  10017

JAMES N. WHITSON   Director
 (62)
                   Executive Vice President, Chief Operating Officer and
                   Director, Sammons Enterprises, Inc.; Director or Trustee, the
                   Seligman Group of Investment Companies; Red Man Pipe and
                   Supply Company, piping and other materials; and C-SPAN.
                   300 Crescent Court, Suite 700, Dallas, TX  75201

ODETTE S. GALLI    Co-Portfolio Manager

                   Vice President, Investment Officer, J. & W. Seligman & Co.
                   Incorporated, investment managers and advisers;  and Co-
                   Portfolio Manager, one other open-end investment company in
                   the Seligman Group of Investment Companies and Tri-
                   Continental Corporation. closed-end investment company.

CHARLES C. SMITH, JR.  Vice President and Portfolio Manager
 (40)
                   Managing Director (formerly, Senior Vice President and Senior
                   Investment Officer),        J. & W. Seligman & Co.
                   Incorporated, investment managers and advisers; Vice
                   President and Portfolio Manager, two other open-end
                   investment companies in the Seligman Group of Investment
                   Companies and Tri-Continental Corporation, closed-end
                   investment company.
     
                                      -7-
<PAGE>
 
    
LAWRENCE P. VOGEL  Vice President
 (40)
                   Senior Vice President, Finance, J. & W. Seligman & Co.
                   Incorporated, investment managers and advisers; Seligman
                   Financial Services, Inc., broker/dealer; and Seligman
                   Advisors, Inc., advisers; and Seligman Data Corp.,
                   shareholder service agent; Vice President, the Seligman Group
                   of Investment Companies; and Seligman Services, Inc.
                   broker/dealer; Treasurer, Seligman Holdings, Inc., holding
                   company; and Seligman Henderson Co., advisers; formerly,
                   Senior Vice President, Seligman Securities, Inc.;
                   broker/dealer and Senior Vice President, J. & W. Seligman
                   Trust Co., trust company.

FRANK J. NASTA     Secretary
 (32)
                   Senior Vice President, Law & Regulation and Corporate
                   Secretary, J. & W. Seligman & Co., Incorporated, investment
                   managers and advisers; Corporate Secretary, the Seligman
                   Group of Investment Companies; Seligman Advisors, Inc.
                   advisers; Seligman Financial Services, Inc., broker/dealer;
                   Seligman Henderson Co., advisers; Seligman Services, Inc.,
                   broker/dealer; and Seligman Data Corp., shareholder service
                   agent;  formerly, Secretary, J. & W. Seligman Trust Co.,
                   trust company and attorney, Seward & Kissel, law firm.

THOMAS G. ROSE     Treasurer
 (39)
                   Treasurer, the Seligman Group of Investment Companies; and
                   Seligman Data Corp., shareholder service agent; formerly,
                   Treasurer, American Investors Advisors, Inc. and the American
                   Investors Family of Funds
         
  The Executive Committee of the Board acts on behalf of the Board between
meetings to determine the value of securities and assets owned by the Fund for
which no market valuation is available and to elect or appoint officers of the
Fund to serve until the next meeting of the Board.
     
<TABLE>    
<CAPTION>
 
                                           Compensation Table
                                                                     Pension or
                                                Aggregate        Retirement Benefits    Total Compensation
                                              Compensation       Accrued as part of       from Fund and
Position With Fund                            from Fund (1)         Fund Expenses      Fund Complex (1)(2)
- ----------------------------------------  ---------------------  -------------------  ----------------------
<S>                                       <C>                    <C>                  <C> 
William C. Morris, Director and Chairman           N/A                   N/A                   N/A
Brian T. Zino, Director and President              N/A                   N/A                   N/A
Ronald T. Schroeder, Director                      N/A                   N/A                   N/A
Fred E. Brown, Director*                           N/A                   N/A                   N/A
John R. Galvin, Director                        $3,121.28                N/A               $65,000.00
Alice S. Ilchman, Director                       3,157.00                N/A                66,000.00
Frank A. McPherson, Director                     3,121.28                N/A                65,000.00
John E. Merow, Director                          3,157.00(d)             N/A                66,000.00(d)
Betsy S. Michel, Director                        3,157.00                N/A                66,000.00
James C. Pitney, Director                        3,121.28                N/A                65,000.00
James Q. Riordan, Director                       3,157.00                N/A                66,000.00
Robert L. Shafer, Director                       3,157.00                N/A                66,000.00
James N. Whitson, Director                       3,157.00(d)             N/A                66,000.00(d)
- ---------------------
</TABLE>     
    
(1)  Based on remuneration received by the Directors of the Fund for the year
ended December 31, 1996.

(2)  As defined in the Fund's Prospectus, the Seligman Group of Investment
Companies consists of eighteen investment companies.

* Retired March 20, 1997.

(d)  Deferred.
     

                                      -8-
<PAGE>
 
    
  The Fund has a compensation arrangement under which outside directors may
elect to defer receiving their fees.  Under this arrangement, interest is
accrued on the deferred balances.  The annual cost of such interest is included
in the directors' fees and expenses, and the accumulated balance thereof is
included in "Liabilities" in the Fund's financial statements.  The total amounts
of deferred compensation (including interest) payable in respect of the Fund to
Messrs. Merow and Whitson as of December 31, 1996 were $84,984 and $15,383,
respectively.  As of January 1, 1997, Mr. Merow no longer defers current
compensation.  Mr. Pitney no longer defers current compensation; however, he has
accrued deferred compensation in the amount of $76,486 as of December 31, 1996.
The Fund has applied for, and expects to receive, exemptive relief that would
permit a director who has elected deferral of his or her fees to choose a rate
of return equal to either (i) the interest rate on short-term Treasury bills, or
(ii) the rate of return on the shares of any of the investment companies advised
by the Manager, as designated by the director.  The Fund may, but is not
obligated to, purchase shares of such investment companies to hedge its
obligations in connection with this deferral arrangement.

  Directors and officers of the Fund are also directors or trustees and officers
of some or all of the other investment companies in the Seligman Group.
Directors and officers of the Fund as a group owned less than 1% of the Fund's
Class A Capital Stock at March 31, 1997.  As of that date, no Directors or
officers owned shares of the Fund's Class B and Class D Capital Stock.
     
                                 MANAGEMENT AND EXPENSES

  Under the Management Agreement, dated December 29, 1988, as amended April 10,
1991 and January 1, 1996, subject to the control of the Board of Directors, J. &
W. Seligman & Co. Incorporated ( the "Manager") manages the investment of the
assets of the Fund, including making purchases and sales of portfolio securities
consistent with the Fund's investment objectives and policies, and administers
its business and other affairs.  The Manager provides the Fund with such office
space, administrative and other services and executive and other personnel as
are necessary for Fund operations.  The Manager pays all of the compensation of
directors of the Fund who are employees or consultants of the Manager and of the
officers and employees of the Fund.  The Manager also provides senior management
for Seligman Data Corp., the Fund's shareholder service agent.
    
  The Fund pays the Manager a management fee for its services, calculated daily
and payable monthly.  Effective January 1, 1996, the management fee is equal to
annual rate of .65% of the Fund's average daily net assets on the first $1
billion of net assets, .60% of the Fund's average daily net assets on the next
$1 billion of net assets, and .55% of the Fund's average daily net assets in
excess of $2 billion.  The management fee amounted to $4,516,946 in 1996,
$2,898,605 in 1995 and $2,676,075 in 1994, which was equivalent to  annual rates
of .65%, .48% and .49%, respectively, of the Fund's average net assets in 1996,
1995 and 1994.
     
  The Fund pays all its expenses other than those assumed by the Manager or
Seligman Henderson Co., (the "Subadviser"), including brokerage commissions,
administration, shareholder services and distribution fees, fees and expenses of
independent attorneys and auditors, taxes and governmental fees including fees
and expenses for qualifying the Fund and its shares under Federal and state
securities laws, cost of stock certificates and expenses of repurchase or
redemption of shares, expenses of printing and distributing reports, notices and
proxy materials to shareholders, expenses of printing and filing reports and
other documents with governmental agencies, expenses of shareholders' meetings,
expenses  of corporate data processing and related services, shareholder
recordkeeping and shareholder account services, fees and disbursements of
transfer agents and custodians, expenses of disbursing dividends and
distributions, fees and expenses of directors of the Fund not employed by (or
serving as a Director of) the Manager or its affiliates, insurance premiums and
extraordinary expenses such as litigation expenses.

  The Management Agreement was initially approved by the Board of Directors on
September 30, 1988 and by the shareholders at a Special Meeting held on December
16, 1988.  The amendments to the Management Agreement, effective April 10, 1991,
to increase the fee rate payable to the Manager by the Fund, were approved by
the Fund's Board of Directors on January 17, 1991 and approved by shareholders
at a special meeting held on April 10, 1991.  The amendments to the Management
Agreement, effective January 1, 1996, to increase the fee rate payable to the
Manager by the Fund were approved by the Fund's Board of Directors on September
21, 1995 and by the shareholders at a special meeting on December 12, 1995.  The
Management Agreement will continue in effect until December 31 of each year if
(1) such continuance is approved in the manner required by the 1940 Act (i.e. by
a vote of a majority of the Board of Directors or of the outstanding voting
securities of the Fund and by a vote of a majority of the Directors who are not
parties to the Management Agreement or interested persons of any such party) and
(2) if the Manager shall not have notified the Fund at least 60 

                                      -9-
<PAGE>
 
days prior to December 31 of any year that it does not desire such continuance.
The Management Agreement may be terminated by the Fund, without penalty, on 60
days' written notice to the Manager and will terminate automatically in the
event of its assignment. The Fund has agreed to change its name upon termination
of the Management Agreement if continued use of the name would cause confusion
in the context of the Manager's business.

  The Manager is a successor firm to an investment banking business founded in
1864 which has thereafter provided investment services to individuals, families,
institutions and corporation.  On December 29, 1988, a majority of the
outstanding voting securities of the Manager was purchased by Mr. William C.
Morris and a simultaneous recapitalization of the Manager occurred.  See the
Appendix for further history of the Manager.
    
  Under the Subadvisory Agreement, dated June 1, 1994, as amended January 1,
1996, the Subadviser supervises and directs a portion of the Fund's investment
in foreign securities and Depositary Receipts as designated by the Manager,
consistent with the Fund's investment objectives, policies and principles.  For
these services, the Subadviser is paid a fee by the Manager as described in the
Fund's Prospectus.  The Subadvisory Agreement was initially approved by the
Board of Directors at a meeting held on January 20, 1994 and by the shareholders
of the Fund on May 19, 1994.  The amendments to the Subadvisory Agreement,
effective January 1, 1996, to increase the subadvisory fee rate payable by the
Manager to the Subadviser, were approved by the Fund's Board of Directors on
September 21, 1995 and by the shareholders at a special meeting held on December
12, 1995.  The Subadvisory Agreement will continue in effect until December 31
of each year if (1) such continuance is approved in the manner required by the
1940 Act (by a vote of a majority of the Board of Directors or of the
outstanding voting securities of the Fund and by a vote of a majority of the
Directors who are not parties to the Subadvisory Agreement or interested persons
of any such party) and (2) the Subadviser shall not have notified the Manager in
writing at least 60 days prior to December 31 of any year that it does not
desire such continuance.  The Subadvisory Agreement may be terminated at any
time by the Fund, on 60 days written notice to the Subadviser.  The Subadvisory
Agreement will terminate automatically in the event of its assignment or upon
the termination of the Management Agreement.

  For the years ended December 31, 1996 and 1995, and for the period June 1,
1994 through December 31, 1994, the Subadviser was paid fees by the Manager of
$367,285, $244,337 and $146,005, , respectively.

  The Subadviser is a New York general partnership formed by the Manager and
Henderson International, Inc., a controlled affiliate of Henderson plc.
Henderson plc, headquartered in London, is one of the largest independent money
managers in Europe.  The Firm managed approximately $18.1 billion in assets as
of December 31, 1996 and is recognized as a specialist in global equity
investing.
     
  Officers, directors and employees of the Manager are permitted to engage in
personal securities transactions, subject to the Manager's Code of Ethics (the
"Ethics Code").  The Ethics Code proscribes certain practices with regard to
personal securities transactions and personal dealings, provides a framework for
the reporting and monitoring of personal securities transactions by the
Manager's Director of Compliance, and sets forth a procedure of identifying, for
disciplinary action, those individuals who violate the Ethics Code.  The Ethics
Code prohibits each of the officers, directors and employees (including all
portfolio managers) of the Manager from purchasing or selling any security that
the officer, director or employee knows or believes (i) was recommended by the
Manager for purchase or sale by any client, including the Fund, within the
preceding two weeks, (ii) has been reviewed by the Manager for possible purchase
or sale within the preceding two weeks, (iii) is being purchased or sold by any
client, (iv) is being considered by a research analyst, (v) is being acquired in
a private placement, unless prior approval has been obtained from the Manager's
Director of Compliance, or (vi) is being acquired during an initial or secondary
public offering.  The Ethics Code also imposes a strict standard of
confidentiality and requires portfolio managers to disclose any interest they
may have in the securities or issuers that they recommend for purchase by any
client.

  The Ethics Code also prohibits (i) each portfolio manager or member of an
investment team from purchasing or selling any security within seven calendar
days of the purchase or sale of the security by a client's account (including
investment company accounts) for which the portfolio manager or investment team
manages and (ii) each employee from engaging in short-term trading (a purchase
and sale or vice-versa within 60 days).  Any profit realized pursuant to either
of these prohibitions must be disgorged.

  Officers, directors and employees are required, except under very limited
circumstances, to engage in personal securities transactions through the
Manager's order desk.  The order desk maintains a list of securities that may
not be purchased due 

                                      -10-
<PAGE>
 
to a possible conflict with clients. All officers, directors and employees are
also required to disclose all securities beneficially owned by them on December
31 of each year.

          ADMINISTRATION, SHAREHOLDER SERVICES AND DISTRIBUTION PLAN

  The Fund has adopted an Administration, Shareholder Services and Distribution
Plan for each Class (the "Plan") in accordance with Section 12(b) of the 1940
Act and Rule 12b-1 thereunder.

  The Plan was approved on July 16, 1992 by the Board of Directors of the Fund,
including a majority of the Directors who are not "interested persons" (as
defined in the 1940 Act) of the Fund and who have no direct or indirect
financial interest in the operation of the Plan or in any agreement related to
the Plan (the "Qualified Directors") and was approved by shareholders of the
Fund at a Special Meeting of Shareholders held on November 23, 1992.  The Plan
became effective in respect of the Class A shares on January 1, 1993.  The Plan
was approved in respect of the Class B shares on March 21, 1996  by the Board of
Directors of the Fund, including a majority of Qualified Directors, and became
effective in respect of the Class B shares on April 22, 1996.  The Plan was
approved in respect of the Class D shares on March 18, 1993 by the Board of
Directors of the Fund, including a majority of the Qualified Directors, and
became effective in respect of the Class D shares on May 1, 1993.  The Plan will
continue in effect through December 31 of each year so long as such continuance
is approved annually by a majority vote of both the Directors and the Qualified
Directors of the Fund, cast in person at a meeting called for the purpose of
voting on such approval.  The Plan may not be amended to increase materially the
amounts payable to Service Organizations with respect to a Class without the
approval of a majority of the outstanding voting securities of the Class.  If
the amount payable in respect of Class A shares under the Plan is proposed to be
increased materially, the Fund will either (i) permit holders of Class B shares
to vote as a separate class on the proposed increase or (ii) establish a new
class of shares subject to the same payment under the Plan as existing Class A
shares, in which case the Class B shares will thereafter convert into the new
class instead of into Class A shares.  No material amendment to the Plan may be
made except by a majority of both the Directors and Qualified Directors.
    
  For the year ended December 31, 1996, Seligman Financial Services, Inc.
("SFSI") received payments of $1,516,877 under the Plan in respect of Class A
shares, or 0.24% per annum of the average daily net assets of Class A shares.
This amount was used primarily to pay Service Organizations on a continuing
basis for providing personal services and/or maintenance of shareholder
accounts.  For the period ended December 31, 1996, fees incurred by the Fund in
respect of Class B shares amounted to $20,276, or 1.00% per annum of the average
daily net assets of Class B shares. Of this amount, 0.725% per annum was paid
directly to FEP Capital, L.P. ("FEP") to compensate it for having funded, at the
time of sale (i) the 4% commission paid to selling brokers and (ii) a payment of
0.25% of sales to SFSI; 0.025% per annum was paid to SFSI; and the remaining
0.25% per annum was paid to SFSI which, in turn, made an equal payment to
Service Organizations for providing personal services and/or maintenance of
shareholder accounts.  For the year ended December 31, 1996, fees incurred in
respect of Class D shares amounted to $555,613, or 1.00% per annum of the
average daily net assets of Class D shares.  This amount was paid to SFSI and,
in the first twelve months after a sale, reimbursed it primarily for the 1%
payment made to dealers at the time of sale and for certain other direct
distribution costs.  After the first twelve months, fees paid to SFSI are used
to pay a continuing fee to Service Organizations.
     
  The Plan requires that the Treasurer of the Fund shall provide to the
Directors, and the Directors shall review, at least quarterly, a written report
of the amounts expended (and purposes therefore) under the Plan.  Rule 12b-1
also requires that the selection and nomination of Directors who are not
"interested persons" of the Fund be made by such disinterested Directors.

                            PORTFOLIO TRANSACTIONS

  The Management and Subadvisory Agreements recognize that in the purchase and
sale of portfolio securities the Manager and Subadviser will seek the most
favorable price and execution, and, consistent with that policy, may give
consideration to the research, statistical and other services furnished by
brokers or dealers to the Manager and Subadviser for their use, as well as to
the general attitude toward and support of investment companies demonstrated by
such broker or dealers.  Such services include supplemental investment research,
analysis and reports concerning issuers, industries and securities deemed by the
Manager and Subadviser to be beneficial to the Fund.  In addition, the Manager
and Subadviser are authorized to place orders with brokers who provide
supplemental investment and market research and security and economic analysis
although the use of such brokers may result in a higher brokerage charge to the
Fund that the use of brokers selected solely on the basis of seeking the most
favorable price and execution and although such research and analysis may be
useful to the Manager and Subadviser in connection with its services to clients
other than the Fund.

                                      -11-
<PAGE>
 
  In over-the-counter markets, the Fund deals with primary market makers unless
a more favorable execution or price is believed to be obtainable.  The Fund may
buy securities from or sell securities to dealers acting as principal, except
dealers with which its directors and/or officers are affiliated.

  When two or more of the investment companies in the Seligman Group or other
investment advisory clients of the Manager and Subadviser desire to buy or sell
the same security at the same time the securities purchased or sold are
allocated by the Manager and Subadviser in a manner believed to be equitable to
each.  There may be possible advantages or disadvantages of such transactions
with respect to price or the size of positions readily obtainable or saleable.
    
  The total brokerage commissions paid to others for execution and research and
statistical services for the fiscal years ended December 31, 1996, 1995 and 1994
were $1,374,513, $866,610 and $947,390, respectively.      
         

                    PURCHASE AND REDEMPTION OF FUND SHARES
    
  The Fund issues three classes of shares:  Class A shares may be purchased at a
price equal to the next determined net asset value per share, plus a sales load.
Class A shares purchased at net asset value without an initial sales load due to
the size of the purchase are subject to a CDSL of 1% if such shares are redeemed
within eighteen months of purchase.  Class B shares may be purchased at a price
equal to the next determined net asset value without an initial sales load, but
a CDSL may be charged on redemptions within 6 years of purchase.  Class D shares
may be purchased at a price equal to the next determined net asset value without
an initial sales load, but a CDSL may be charged on redemptions within one year
of purchase.  See "Alternative Distribution System," "Purchase of Shares," and
"Redemption of Shares" in the Prospectus.       

SPECIMEN PRICE MAKE-UP
    
  Under the current distribution arrangements between the Fund and the
Distributor, Class A shares are sold at a maximum sales charge of 4.75% and
Class B and Class D shares are sold at net asset value.*  Using the Fund's net
asset value at December 31, 1996, the maximum offering price of the Fund's
shares is as follows:       

<TABLE>     
<CAPTION>
 
   CLASS A
<S>                                                 <C>
 
  Net asset value per Class A share...............   $14.89
                                                     ------
 
  Maximum sales load (4.75% of offering price)....     0.74
                                                     ------
 
  Offering price to public........................   $15.63
                                                     ======
 
  CLASS B AND CLASS D
 
  Net asset value and offering price per  share*..   $14.87
                                                     ======
- ---------
</TABLE>      
    
* Class B shares are subject to a CDSL declining from 5% in the first year after
  purchase to 0% after 6 years.  Class D shares are subject to a CDSL of 1% on
  redemptions within one year of purchase.  See "Redemption of Shares" in the
  Prospectus.

CLASS A SHARES - REDUCED INITIAL SALES LOADS

REDUCTIONS AVAILABLE.  Shares of any  Seligman Mutual Fund sold with an initial
sales load in a continuous offering will be eligible for the following
reductions:

  VOLUME DISCOUNTS are provided if the total amount being invested in Class A
shares of the Fund alone, or in any combination of shares of the other Seligman
Mutual Funds which were sold with an initial  sales load, reaches levels
indicated in the sales load schedule set forth in the Prospectus.
     

                                      -12-
<PAGE>
 
    
  THE RIGHT OF ACCUMULATION allows an investor to combine the amount being
invested in Class A shares of the Fund and shares of the other Seligman Mutual
Funds which were sold with an initial  sales load with the total net asset value
of shares of those mutual funds already owned that were sold with an initial
sales load and the total net asset value of shares of Seligman Cash Management
Fund which were acquired through an exchange of shares of another Seligman
Mutual Fund on which there was an initial  sales load at the time of purchase to
determine reduced sales loads in accordance with the schedule in the Prospectus.
The value of the shares owned, including the value of shares of Seligman Cash
Management Fund acquired in an exchange of shares of another Seligman Mutual
Fund on which there was an initial sales load at the time of purchase will be
taken into account in orders placed through a dealer, however, only if SFSI is
notified by an investor or dealer of the amount owned by the investor at the
time the purchase is made and is furnished sufficient information to permit
confirmation.

  A LETTER OF INTENT allows an investor to purchase Class A shares over a 13-
month period at reduced initial sales loads in accordance with the sales load
schedule in the Prospectus, based on the total amount of Class A shares of the
Fund that the letter states the investor intends to purchase plus the total net
asset value of shares sold with an initial  sales load of the other Seligman
Mutual Funds  already owned and the total net asset value of shares of Seligman
Cash Management Fund which were acquired through an exchange of shares of
another Seligman Mutual Fund on which there was an initial  sales load at the
time of purchase.  Reduced initial sales loads also may apply to purchases made
within a 13-month period starting up to 90 days before the date of execution of
a letter of intent.  For more information concerning the terms of the letter of
intent, see "Terms and Conditions - Letter of Intent - Class A Shares Only"  in
the back of the Prospectus.

  Class A shares purchased without an initial sales load in accordance with the
sales load schedule in the Fund's prospectus, or pursuant to a Volume Discount,
Right of Accumulation or Letter of Intent are subject to a CDSL of 1% on
redemptions of such shares within eighteen months of purchase.
     
PERSONS ENTITLED TO REDUCTIONS.  Reductions in initial sales loads apply to
purchases of Class A shares by a "single person," including an individual;
members of a family unit comprising husband, wife and minor children; or a
trustee or other fiduciary purchasing for a single fiduciary account.  Employee
benefit plans qualified under Section 401 of the Internal Revenue Code of 1986,
as amended, organizations tax exempt under Section 501 (c)(3) or (13), and non-
qualified employee benefit plans that satisfy uniform criteria are considered
"single persons" for this purpose.  The uniform criteria are as follows:

  1.  Employees must authorize the employer, if requested by the Fund, to
receive in bulk and to distribute to each participant on a timely basis the Fund
prospectus, reports and other shareholder communications.

  2.  Employees participating in a plan will be expected to make regular
periodic investments (at least annually).  A participant who fails to make such
investments may be dropped from the plan by the employer or the Fund 12 months
and 30 days after the last regular investment in his account.  In such event,
the dropped participant would lose the discount on share purchases to which the
plan might then be entitled.

  3.  The employer must solicit its employees for participation in such an
employee benefit plan or authorize and assist an investment dealer in making
enrollment solicitations.
    
ELIGIBLE EMPLOYEE BENEFIT PLANS.   The table of sales loads in the Prospectus
applies to sales to "eligible employee benefit plans" (as defined in the Fund's
Prospectus) except that the Fund may sell shares at net asset value to "eligible
employee benefit plans," which have at least (i) $500,000 invested in Seligman
Mutual Funds or (ii) eligible employees to whom such plan is made available.
Such sales must be made in connection with a payroll deduction  system of plan
funding or other systems acceptable to Seligman Data Corp., the Fund's
shareholder service agent.  Such sales are believed to require limited sales
effort and sales-related expenses and therefore are made at net asset value.
Contributions or account information for plan participation also should be
transmitted to Seligman Data Corp. by methods which it accepts.  Additional
information about "eligible employee benefit plans" is available from investment
dealers or SFSI.
     
PAYMENT IN SECURITIES.  In addition to cash, the Fund may accept securities in
payment for Fund shares sold at the applicable public offering price (net asset
value plus any applicable sales load) although the Fund does not presently
intend to accept securities in payment for Fund shares.  Generally, the Fund
will only consider accepting securities (l) to increase its holdings in a
portfolio security, or (2) if the Manager determines that the offered securities
are a suitable investment for the Fund and in a sufficient amount for efficient
management.  Although no minimum has been established, it is expected that the

                                      -13-
<PAGE>
 
Fund would not accept securities with a value of less than $100,000 per issue in
payment for shares.  The Fund may reject in whole or in part offers to pay for
Fund shares with securities, may require partial payment in cash for applicable
sales loads, and may discontinue accepting securities as payment for Fund shares
at any time without notice.  The Fund will not accept restricted securities in
payment for shares.  The Fund will value accepted securities in the manner
provided for valuing portfolio securities of the Fund.  Any securities accepted
by the Fund in payment for Fund shares will have an active and substantial
market and have a value which is readily ascertainable (See "Valuation").
    
FURTHER TYPES OF REDUCTIONS. Class A shares also may be issued without an
initial sales load in connection with the acquisition of cash and securities
owned by other investment companies and personal holding companies; to any
registered unit investment trust which is the issuer of periodic payment plan
certificates, the net proceeds of which are invested in fund shares; to separate
accounts established and maintained by an insurance company which are exempt
from registration under Section 3(c)(11) of the 1940 Act; to registered
representatives and employees (and their spouses and minor children) of any
dealer that has a sales agreement with SFSI; to shareholders of mutual funds
with objectives and policies similar to the Fund who purchase shares with
redemption proceeds of such funds (not to exceed the dollar value of such
redemption proceeds); to financial institution trust departments; to registered
investment advisers exercising discretionary investment authority with respect
to the purchase of Fund shares; to accounts of financial institutions or
broker/dealers that charge account management fees, provided the manager or one
of its affiliates has entered into an agreement with respect to such accounts;
pursuant to sponsored arrangements with organizations which make recommendations
to or permit group solicitations of, its employees, members or participants in
connection with the purchase of shares of the Fund; to other investment
companies in the Seligman Group in connection with a deferred fee arrangement
for outside directors; and to "eligible employee benefit plans" which have at
least (i) $500,000 invested in the Seligman Mutual Funds or (ii) 50 eligible
employees to whom such plan is made available.  "Eligible employee benefit plan"
means any plan or arrangement, whether or not tax qualified, which provides for
the purchase of Fund shares.  Sales of shares to such plans must be made in
connection with a payroll deduction system of plan funding or other system
acceptable to Seligman Data Corp.

  The Fund may sell Class A shares at net asset value to present and retired
directors, trustees, officers, employees and their spouses (and family members
of the foregoing) of the Fund, the other investment companies in the Seligman
Group, the Manager, and other companies affiliated with the Manager.  Family
members are defined to include lineal descendants and lineal ancestors, siblings
(and their spouses and children) and any company or organization controlled by
any of the foregoing.  Such sales also may be made to employee benefit and
thrift plans for such persons and to any investment advisory, custodial, trust
or other fiduciary account managed or advised by the Manager or any affiliate.
These sales may be made for investment purposes only, and shares may be resold
only to the Fund.
     
  Class A shares may be sold at net asset value to these persons since such
sales require less sales effort and lower sales related expenses as compared
with sales to the general public.

MORE ABOUT REDEMPTIONS.  The procedures for redemption of Fund shares under
ordinary circumstances are set forth in the Prospectus.  In unusual
circumstances payment may be postponed, or the right of redemption postponed for
more than seven days if the orderly liquidation of portfolio securities is
prevented by the closing of, or restricted trading on the NYSE during periods of
emergency, or such other periods as ordered by the Securities and Exchange
Commission. Payment may be made in securities, subject to the review of some
state securities commissions.  If payment is made in securities, a shareholder
may incur brokerage expenses in converting these securities into cash.

                                 DISTRIBUTION SERVICES
    
  SFSI, an affiliate of the Manager, acts as general distributor of the shares
of the Fund and of the other mutual funds in the Seligman Group  The Fund and
SFSI are parties to a Distributing Agreement, dated January 1, 1993.  As general
distributor of the Fund's Capital Stock, SFSI allows commissions to all dealers,
as indicated in the Prospectus.  Pursuant to agreements with the Fund, certain
dealers may also provide sub-accounting and other services for a fee.  SFSI
receives the balance of sales loads and any CDSLs paid by investors.  The
balance of sales loads paid by investors and received by SFSI in respect of
Class A shares amounted to $102,883 in 1996, after allowance of $797,266 as
commissions to dealers; $83,458 in 1995, after allowance of $1,076,487 as
commissions to dealers; and $46,173 in 1994, after allowance of $355,656 as
commissions to dealers. For the years ended December 31, 1996 1995 and 1994,
SFSI retained CDSL charges from Class D shares amounting to $15,668, $8,440 and
$3,862, respectively.
     

                                      -14-
<PAGE>
 
    
          SFSI has assigned its rights to collect any CDSL imposed on
redemptions of Class B shares to FEP Capital, L.P. ("FEP").  SFSI has also
assigned its rights to substantially all of the distribution fees in respect of
Class B shares received by it pursuant to the Plan (other than the portion of
such fees used to make ongoing shareholder servicing payments to Service
Organizations as described in the Prospectus) to FEP, which provides funding to
SFSI to enable it to pay commissions to dealers at the time of the sale of the
related Class B shares.  In connection with the assignment of its rights to
collect any CDSL and the distribution fees with respect to Class B shares, SFSI
receives payments from FEP based on the value of Class B shares sold.  The
aggregate amount of such payments from FEP and the Class B distribution fees
retained by SFSI for the period ended December 31, 1996, was $16,591.

  Effective April 1, 1995, Seligman Services, Inc. ("SSI"), an affiliate of the
Manager, became eligible to receive commissions from certain sales of Fund
shares, as well as distribution and service fees pursuant to the Plan.  For the
years ended December 31, 1996 and 1995, SSI received commissions of $21,997 and
$26,338, respectively, from sales of Fund shares.  SSI also received
distribution and service fees of $448,975 and $315,230, respectively, pursuant
to the Plan.
     
                                 VALUATION

  Net asset value per share of each class of the Fund is determined as of the
close of trading on the NYSE, (normally, 4:00 p.m. Eastern time), on each day
that the NYSE is open.  The NYSE is currently closed on New Year's Day,
Presidents' Day, Good Friday, Memorial Day, Independence Day, Labor Day,
Thanksgiving Day and Christmas Day.  The Fund will also determine net asset
value for each class on each day in which there is a sufficient degree of
trading in the Fund's portfolio securities that the net asset value of Fund
shares might be materially affected.  Net asset value per share for a class is
computed by dividing such class' share of the value of the net assets of the
Fund (i.e., the value of its assets less liabilities) by the total number of
outstanding shares of such class.  All expenses of the Fund, including the
Manager's fee, are accrued daily and taken into account for the purpose of
determining net asset value.  The net asset value of Class B and Class D shares
will generally be lower than the net asset value of Class A shares as a result
of the higher distribution fee with respect to such shares.

  Portfolio securities, including open short positions and options written, are
valued at the last sale price on the securities exchange or securities market on
which such securities primarily are traded.  Securities traded on a foreign
exchange or over-the-counter market are valued at the last sales price on the
primary exchange or market on which they are traded. United Kingdom securities
and securities for which there are no recent sales transactions are valued based
on quotations provided by primary market makers in such securities.  Any
securities for which recent market quotations are not readily available,
including restricted securities, are valued at fair value as determined in
accordance with procedures approved by the Board of Directors.  Short-term
obligations with less than sixty days remaining to maturity are generally valued
at amortized cost.  Short-term obligations with more than sixty days remaining
to maturity will be valued on an amortized cost basis based on the value of such
date unless the Board determines that this amortized cost value does not
represent fair market value.  Expenses and fees, including the investment
management fee, are accrued daily and taken into account for the purpose of
determining the net asset value of Fund shares.  Premiums received on the sale
of call options will be included in the net asset value, and the current market
value of the options sold by the Fund will be subtracted from net asset value.

  Generally, trading in foreign securities, as well as U.S. Government
securities, money market instruments and repurchase agreements, is substantially
completed each day at various times prior to the close of the NYSE.  The values
of such securities used in computing the net asset value of the shares of the
Fund are determined prior to the close of the NYSE, which will not be reflected
in the computation of net asset value.  If during such periods events occur
which materially affect the value of such securities, the securities will be
valued at their fair market value as determined in accordance with procedures
approved by the Fund's Board of Directors.

  For purposes of determining the net asset value per share of the Fund, all
assets and liabilities initially expressed in foreign currencies will be
converted into U.S. dollars at the mean between the bid and offer prices of such
currencies against U.S. dollars quoted by a major bank that is a regular
participant in the foreign exchange market or on the basis of a pricing service
that takes into account the quotes provided by a number of such major banks.

                                      -15-
<PAGE>
 
                                  PERFORMANCE
    
  The Fund's average annual total returns of Class A shares for the one-year,
five-year and ten-year periods ended on December 31, 1996 were 9.94%, 11.97% and
11.89% respectively.  These returns were computed by subtracting the maximum
sales load of $47.50 (4.75% of public offering price) and assuming that all of
the dividends and distributions by the Fund over the relevant time period were
reinvested.  It was then assumed that at the end of each period, the entire
amount was redeemed.  The average annual total return was then calculated by
calculating the annual rate required for the initial investment to grow to the
amount which would have been received upon redemption (i.e., the average annual
compound rate of return).  The total returns for Class B shares of the Fund for
the period April 22, 1996 (inception) through December 31, 1996 was 4.21%.  This
return was computed assuming that all the dividends and distributions paid by
the Fund's Class B shares were reinvested over the relevant time period.  It was
then assumed that at the end of the period, the entire amount was redeemed,
subtracting the 5% CDSL.  The average annual total returns for Class D shares of
the Fund for the year ended December 31, 1995 and since inception through
December 31, 1996 were 13.58% and 12.46%, respectively.  These returns were
computed assuming  that all of the dividends and distributions paid by the
Fund's Class D shares, were reinvested over the relevant time period.  It was
then assumed that at the end of each period, the entire amount was redeemed,
subtracting the 1% CDSL, if applicable.

  Table A below illustrates the total return (income and capital) on Class A
shares of the Fund with dividends invested and gain distributions taken in
shares.  It shows that a $1,000 investment in Class A shares, assuming payment
of the 4.75% sales load, made on January 1, 1986 had a value of $3,075 on
December 31, 1996, resulting in an aggregate total return of 207.45%.  Table B
illustrates the total return (income and capital) on Class B shares of the Fund
with dividends invested and gain distributions taken in shares.  It shows that a
$1,000 investment in Class B shares made on April 22, 1996 (commencement of
offering of Class B shares) had a value of $1,042 on December 31, 1996 resulting
in an aggregate total return of 4.21%.  Table C illustrates the total return
(income and capital) on Class D shares of the Fund with dividends invested and
gain distributions taken in shares.  It shows that a $1,000 investment in Class
D shares made on May 3, 1993 (commencement of offering of Class D shares) had a
value of $1,538 on December 31, 1996 resulting in an aggregate total return of
53.80%.  The results shown should not be considered a representation of the
dividend income or gain or loss in capital value which may be realized from an
investment made in a class of shares of the Fund today.       
<TABLE>    
<CAPTION>
 
                                       TABLE A - CLASS A SHARES
 
                                                  VALUE OF
YEAR           VALUE OF INITIAL   VALUE OF GAIN   DIVIDEND                   TOTAL
ENDED (1)      INVESTMENT (2)     DISTRIBUTION    INVESTED  TOTAL VALUE (2)  RETURN (3)
- -------------  ----------------   --------------  --------  --------------   ---------
<S>            <C>                <C>             <C>       <C>              <C> 
12/31/87                 $  809           $  120      $ 26          $  955
12/31/88                    826              163        62           1,051
12/31/89                    895              330       107           1,332
12/31/90                    775              370       135           1,280
12/31/91                    916              537       210           1,663
12/31/92                    935              642       267           1,844
12/31/93                    985              797       336           2,118
12/31/94                    886              834       358           2,078
12/31/95                  1,037            1,143       483           2,663
12/31/96                  1,089            1,413       573           3,075      207.45%
 
                                  TABLE B - CLASS B SHARES
 
                                                  VALUE OF
YEAR/PERIOD    VALUE OF INITIAL   VALUE OF GAIN   DIVIDEND                   TOTAL
ENDED (1)      INVESTMENT (2)     DISTRIBUTION    INVESTED  TOTAL VALUE (2)  RETURN (3)
- -------------  ----------------   --------------  --------  --------------   ---------
<S>            <C>                <C>             <C>       <C>              <C> 
12/31/96                 $  955           $   76      $ 11          $1,042        4.21%
 
</TABLE>      

                                      -16-
<PAGE>
 
<TABLE>     
<CAPTION>
                                       TABLE C- CLASS D SHARES
 
                                                 VALUE OF
YEAR/PERIOD    VALUE OF INITIAL   VALUE OF GAIN  DIVIDEND                   TOTAL
ENDED (1)      INVESTMENT (2)     DISTRIBUTION   INVESTED  TOTAL VALUE (2)  RETURN (3)
- -------------  ----------------   -------------  --------  --------------   ---------
<S>            <C>                <C>            <C>       <C>              <C> 
12/31/93                 $1,013            $ 62       $16          $1,091
12/31/94                    909             115        32           1,056
12/31/95                  1,065             220        57           1,342
12/31/96                  1,119             338        81           1,538       53.80%
</TABLE>     
    
1 For the ten years ended December 31, 1996; commencement of offering of Class B
  shares on April 22, 1996; and from commencement of offering of Class D shares
  on May 3, 1993.        

2 The "Value of Initial Investment" as of the date indicated reflects the effect
  of the maximum sales load, assumes that all dividends and capital gain
  distributions were taken in cash and reflects changes in the net asset value
  of the shares purchased with the hypothetical initial investment.  "Total
  Value" reflects the effect of the CDSL, if applicable, assumes investment of
  all dividends and capital gain distributions and reflects changes in the net
  asset value.
    
3 "Total Return" for each class of shares of the Fund is calculated by assuming
  a hypothetical initial investment of $1,000 at the beginning of the period
  specified, subtracting the maximum sales load for Class A shares; determining
  total value of all dividends and capital gain distributions that would have
  been paid during the period on such shares assuming that each dividend or
  capital gain distribution was invested in additional shares at net asset
  value; calculating the total value of the investment at the end of the period;
  subtracting the CDSL on Class B and Class D shares, if applicable; and
  finally, by dividing the difference between the amount of the hypothetical
  initial investment at the beginning of the period and its total value at the
  end of the period by the amount of the hypothetical initial investment.
     
  No adjustments have been made for any income taxes payable by investors on
dividends invested or gain distributions taken in shares.

  The total return and average annual total return of the Class A shares quoted
from time to time through December 31, 1992 does not reflect the deduction of
the administration, shareholder services and distribution fee, effective January
1, 1993; through April 10, 1991 also does not reflect the increased management
fee approved by shareholders on April 10, 1991, and through December 31, 1995,
does not reflect the increased management fee approved by shareholders on
December 12, 1995, and effective on January 1, 1996, which fees if reflected
would reduce the performance quoted.

  The Fund may also include its aggregate total return over a specified period
in advertisements or in information furnished to present or prospective
shareholders.

                              GENERAL INFORMATION
    
    It is the intention of the Fund not to hold Annual Meetings of Shareholders.
The Directors may call Special Meetings of Shareholders for action by
shareholder vote as may be required by the 1940 Act or the Articles of
Incorporation.
     
CAPITAL STOCK.  The Board of Directors is authorized to classify or reclassify
and issue any unissued Capital Stock of the Fund into any number of other
classes without further action by shareholders.  The 1940 Act requires that
where more than one class exists, each class must be preferred over all other
classes in respect of assets specifically allocated to such class.

CUSTODIAN.  Investors Fiduciary Trust Company, 127 West 10th Street, Kansas
City, Missouri 64105 serves as custodian of the Fund.  It also maintains, under
the general supervision of the Manager, the accounting records and determines
the net asset value for the Fund.

AUDITORS.  Deloitte & Touche LLP, independent auditors, have been selected as
auditors of the Fund.  Their address is Two World Financial Center, New York,
New York  10281.

                                      -17-
<PAGE>
 
                             FINANCIAL STATEMENTS
    
  The Annual Report to Shareholders for the year ended December 31, 1996 is
incorporated by reference into this Statement of Additional Information.  The
Annual Report contains a schedule of the investments as of December 31, 1996, as
well as certain other financial information as of that date.  The Annual Report
will be furnished, without charge, to investors who request copies of the Fund's
Statement of Additional Information.
     

                                      -18-
<PAGE>
 
                                   APPENDIX

                HISTORY OF J. & W. SELIGMAN & CO. INCORPORATED


     Seligman's beginnings date back to 1837, when Joseph Seligman, the oldest
of eight brothers, arrived in the United States from Germany.  He earned his
living as a pack peddler in Pennsylvania, and began sending for his brothers.
The Seligmans became successful merchants, establishing businesses in the South
and East.

     Backed by nearly thirty years of business success - culminating in the sale
of government securities to help finance the Civil War - Joseph Seligman, with
his brothers, established the international banking and investment firm of J. &
W. Seligman & Co.  In the years that followed, the Seligman Complex played a
major role in the geographical expansion and industrial development of the
United States.

THE SELIGMAN COMPLEX:

 .... Prior to 1900

 . Helps finance America's fledgling railroads through underwriting.
 . Is admitted to the New York Stock Exchange in 1869.  Seligman remained a
  member of the NYSE until 1993, when the evolution of its business made it
  unnecessary.
 . Becomes a prominent underwriter of corporate securities, including New York
  Mutual Gas Light Company, later part of Consolidated Edison.
 . Provides financial assistance to Mary Todd Lincoln and urges the Senate to
  award her a pension.
 . Is appointed U.S. Navy fiscal agent by President Grant.
 . Becomes a leader in raising capital for America's industrial and urban
  development.

 ...1900-1910

 . Helps Congress finance the building of the Panama Canal.

 ...1910s

 . Participates in raising billions for Great Britain, France and Italy, helping
to finance World War I.

 ...1920s

 . Participates in hundreds of underwritings including those for some of the
  country's largest companies: Briggs Manufacturing, Dodge Brothers, General
  Motors, Minneapolis-Honeywell Regulatory Company, Maytag Company, United
  Artists Theater Circuit and Victor Talking Machine Company.

 . Forms Tri-Continental Corporation in 1929, today the nation's largest,
  diversified closed-end equity investment company, with over $2 billion in
  assets, and one of its oldest.

 ...1930s

 . Assumes management of Broad Street Investing Co. Inc., its first mutual fund,
  today known as Seligman Common Stock Fund, Inc.
 . Establishes Investment Advisory Service.

 ...1940s

 . Helps shape the Investment Company Act of 1940.
 . Leads in the purchase and subsequent sale to the public of Newport News
  Shipbuilding and Dry Dock Company, a prototype transaction for the investment
  banking industry.
 . Assumes management of National Investors Corporation, today Seligman Growth
  Fund, Inc.
 . Establishes Whitehall Fund, Inc., today Seligman Income Fund, Inc.

                                      -19-
<PAGE>
 
 ...1950-1989
    
 . Develops new open-end investment companies.  Today, manages more than 40
  mutual fund portfolios.
 . Helps pioneer state-specific, municipal bond funds, today managing a national
  and 18 state-specific municipal funds.
 . Establishes J. & W. Seligman Trust Company, and J. & W. Seligman Valuations
  Corporation.
 . Establishes Seligman Portfolios, Inc., an investment vehicle offered through
  variable annuity products.
     
 ...1990s
    
 . Introduces Seligman Select Municipal Fund and Seligman Quality Municipal Fund,
  two closed-end funds that invest in high-quality municipal bonds.
 . In 1991 establishes a joint venture with Henderson  plc, of London, known as
  Seligman Henderson Co., to offer global investment products.
 . Introduces Seligman Frontier Fund, Inc., a small capitalization mutual fund.
 . Launches Seligman Henderson Global Fund Series, Inc., which today offers five
  separate series: Seligman Henderson International Fund, Seligman Henderson
  Global Growth Opportunities Fund, Seligman Henderson Global Smaller Companies
  Fund, Seligman Henderson Global Technology Fund and Seligman Henderson
  Emerging Markets Growth Fund.
 . Launches Seligman Value Fund Series, Inc., which currently offers two separate
  series:  Seligman Large-Cap Value Fund and Seligman Small-Cap Value Fund.
     

                                      -20-
<PAGE>
 
================================================================================
                               67TH ANNUAL REPORT




================================================================================
                                    SELIGMAN
                                  COMMON STOCK
                                   FUND, INC.
================================================================================




                                December 31, 1996




                                     [LOGO]
================================================================================
                            A Growth and Income Fund
                               Established in 1930







                        SELIGMAN FINANCIAL SERVICES, INC.
                                 an affiliate of

                                     [LOGO]

                             J. & W. SELIGMAN & CO.
                                  INCORPORATED

                                ESTABLISHED 1864
                       100 Park Avenue, New York, NY 10017


This report is intended only for the  information of  shareholders  or those who
have  received  the  offering  prospectus  covering  shares of Capital  Stock of
Seligman Common Stock Fund,  Inc.,  which contains  information  about the sales
charges,  management fee, and other costs. Please read the prospectus  carefully
before investing or sending money.


                                                                     EQCS2 12/96
<PAGE>
 
================================================================================
SELIGMAN COMMON STOCK FUND, INC.
- --------------------------------------------------------------------------------

A mutual fund that seeks to 
produce  favorable current 
income and long-term growth
of both income and capital value without 
exposing capital to undue risk.





HIGHLIGHTS OF 1996
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                  DECEMBER 31, 1996                DECEMBER 31, 1995
                                                            -----------------------------         -------------------
                                                           CLASS A    CLASS B*     CLASS D         CLASS A     CLASS D
- ---------------------------------------------------------------------------------------------------------------------------

<S>                                                       <C>           <C>        <C>            <C>          <C>    
Net Assets (in thousands) ............................    $656,260      $6,451     $63,938        $614,400     $46,564
- ---------------------------------------------------------------------------------------------------------------------------
Net Asset Value per Share ............................      $14.89      $14.87      $14.87          $14.19      $14.16
   With 1996 Gain Distributions
     Taken in Shares .................................       16.02       15.99       15.99              --          --
   Increase in Net Asset Value with Gain
     Distributions Taken in Shares(1) ................      12.90%       8.04%      12.92%              --          --
- ---------------------------------------------------------------------------------------------------------------------------
Dividends Paid per Share .............................      $0.340      $0.156      $0.213          $0.360      $0.218
   With December 1995 and June 1996
     Gain Distributions Taken in Shares ..............       0.369       0.158       0.229              --          --
Distributions of Realized Gain per Share .............       1.115       1.115       1.115           0.944       0.944
- ---------------------------------------------------------------------------------------------------------------------------
Total Expenses per Dollar of
   Average Net Assets ................................     $0.0115     $0.0192(2)  $0.0191         $0.0093     $0.0172
- ---------------------------------------------------------------------------------------------------------------------------
  *From April 22, 1996 (commencement of operations).
(1)Excluding the effect of dividends paid.
(2)Annualized.

</TABLE>


                                                                               1
<PAGE>
 
================================================================================
TO THE SHAREHOLDERS
- --------------------------------------------------------------------------------

Seligman Common Stock Fund increased its dividend for the 53rd year in a row for
those investors who reinvest their capital gains. The Fund posted moderate gains
in 1996, though the total return based on the net asset value of Class A shares
lagged that of the Standard & Poor's 500 Composite Stock Price Index (S&P 500)
and the Lipper Growth and Income Funds Average. The Fund's investment results
begin on page 6.

     Driven by the outstanding performance of a small number of the largest
stocks, the US equity markets continued to advance in 1996, setting successive
new highs by rebounding from occasional sharp, short-term, setbacks. The S&P
500's total return for the year was 22.96%, and the Dow Jones Industrial Average
(DJIA) posted an exceptional total return of 28.91%. The bond markets, in
contrast, had a less positive year, due to persistent concerns that the
economy's unexpected vigor would produce higher levels of inflation and, in
turn, increases in interest rates.

     A constructive economic environment supported strong corporate earnings in
most industries during 1996. In spite of continued corporate downsizing and
restructuring, the unemployment rate fell as low as 5.2% in August and ended the
year at 5.3%, as compared to 5.6% in December 1995. The increased competitive-
ness of US industry and the low inflation environment provided strong funda-
mental support to higher equity prices.

     Currently, there are no clear indications that there will be either runaway
economic expansion or recession in 1997. Looking ahead, the environment for the
US financial markets and investors remains generally positive, given continued
modest economic growth, low inflation, and bipartisan efforts to balance the
federal budget without raising taxes. While we always recognize that there could
be further short-term volatility, we remain positive about the long-term outlook
for the financial markets and your Fund.

     On a final note, the activity witnessed in the equity markets in 1996,
where large one-day increases followed abrupt corrections, is not unusual in the
challenging world of investing. We believe the best strategy for growth of
capital is long-term investing. A professional financial advisor can help you
formulate a long-term investment plan to help you seek your financial goals, and
can provide the insight and support needed to weather the day-to-day uncertainty
that accompanies investing. It is time, not timing, that counts when it comes to
investing.

     A discussion with your Portfolio Managers and the Fund's portfolio of
investments follow this letter.

     We thank you for your continued interest in Seligman Common Stock Fund, and
look forward to serving your investment needs in the many years to come.

By order of the Board of Directors,




/s/ William Morris
- ------------------
William C. Morris
Chairman


                                                               /s/ Brian T. Zino
                                                               -----------------
                                                                   Brian T. Zino
                                                                       President



January 31, 1997




2
<PAGE>
 
================================================================================
ANNUAL PERFORMANCE OVERVIEW
- --------------------------------------------------------------------------------

The following is a discussion with your Portfolio  Managers  regarding  Seligman
Common  Stock Fund,  and a chart and table  comparing  your  Fund's  performance
against the performance of the Standard & Poor's 500 Composite Stock Price Index
(S&P 500) and the Lipper Growth and Income Funds Average.

YOUR PORTFOLIO MANAGERS

                                   CHARLES C. SMITH, JR. is a Managing Director
                                   of J. & W. Seligman & Co. Incorporated and
                                   has been Vice President and Portfolio Manager
                                   of Seligman Common Stock Fund since December
                                   1991. Mr. Smith is also Vice President and
                                   Portfolio Manager of Seligman Income Fund and
                                   Tri-Continental Corporation. Additionally, he
                                   is Vice President of Seligman Portfolios,
                                   Inc. and Portfolio Manager of its Common
        [PHOTO]                    Stock and Income Portfolios. Mr. Smith joined
                                   Seligman in 1985 as Vice President,
                                   Investment Officer. He was promoted to Senior
                                   Vice President, Senior Investment Officer in
                                   August 1992, and to Managing Director in
                                   January 1994. Odette Galli, Vice President of
                                   J. & W. Seligman & Co. Incorporated, was
                                   named Co-Portfolio Manager of Seligman Common
                                   Stock Fund and Tri-Continental Corporation
                                   this year. Ms. Galli joined Seligman in 1993
                                   as a member of the Seligman Growth and Income
                                   Team. Mr. Smith and Ms. Galli are supported
                                   by a group of investment professionals
                                   dedicated to the growth and income investment
                                   discipline, and to the objectives of Seligman
                                   Common Stock Fund.

Seligman Growth and Income Team: 
(from left) Rodney Collins, Margaret 
Doyle, Jonathan Roth, Odette Galli 
(Co-Portfolio Manager), (seated) 
Melanie Ravenell (Administrative 
Assistant), Charles C. Smith, Jr.
(Co-Portfolio Manager), Amy Fujii


IAIN C. CLARK is Chief Investment Officer of Seligman Henderson Co., Seligman
Common Stock Fund's Subadviser, and is responsible for the international
investment activities of the Fund. Mr. Clark is also head of International
Investments for, and a Director of, Henderson plc, an investment manager in
London, England. He has been with Henderson since 1985.


How did Seligman Common Stock Fund perform in the last 12 months?

"Seligman Common Stock Fund had solid results in 1996, posting a total return of
15.44% based on the net asset value of Class A shares. The Fund's total return
lagged the 22.96% total return of the S&P 500 and the 20.73% total return of the
Lipper Growth and Income Funds Average. However, the Fund's yield exceeded that
of the S&P 500 and was significantly above the average dividend yield of the
Lipper Growth and Income Funds Average. Further, the Fund's risk level, as
measured by the weighted average beta of the Fund's holdings, was less than the
S&P 500. Beta measures the volatility of an investment, as compared to that of
the overall market (represented by the S&P 500)."


Which economic factors affected the Fund's performance in 1996?

"In 1996, the economy grew at a moderate pace and low levels of inflation
prevailed. This environment produced stronger-than-expected corporate profits in
many industries and Seligman Common Stock Fund's equity holdings broadly
benefited in this environment. Further, the declining interest rates in the
second half of the year improved the performance of the interest rate-sensitive
issues in the portfolio."


Which market factors influenced the Fund's performance in the last 12 months?

"Throughout the year, the appreciation of a small number of the largest
companies pushed the markets to record highs. These strong advances were also
due to the steady economy, continued corporate profitability, and increased
mutual fund inflows.

     "Abroad, most mature international markets continued to lag the S&P 500's
impressive rise in 1996. Further, the strength of the US Dollar throughout the
year did not improve international results. The Fund maintains a 10%


                                                                               3
<PAGE>
 
================================================================================
ANNUAL PERFORMANCE OVERVIEW (continued)
- --------------------------------------------------------------------------------

weighting outside the US to take advantage of quality investment opportunities
and to realize a higher potential rate of return over the long term. Though the
international portion of the portfolio did not match the gains of the domestic
investments in 1996, we anticipate improving relative performance for the
international equity markets in the future."


What was your investment strategy?

"The Fund continued to be a true growth and income fund. Over the year,
investment strategy focused on increasing dividends and identifying undervalued
stocks with strong potential for long-term growth. In a year that was driven by
momentum investing, with large-company stocks clearly leading the markets, we
identified large-company growth stocks selling at attractive relative historic
valuations. While most large-company stocks traded at the high end of their
historic ranges, we kept our value orientation and maintained the portfolio's
low level of risk and reasonable valuation.

     "Over the last 12 months, opportunistic buying led us to several
restructuring companies, which proved quite profitable. We sought companies
whose managements were working to improve the corporate balance sheet, increase
efficiency, and therefore enhance profitability. As each fit the restructuring
model, General Signal, an industrial equipment company, Olin, a chemical
manufacturer, and Woolworth, a retailer, were purchased. AMP, an electronics
manufacturer, and Raytheon, a defense company, were also purchased, as we
believe their managements' restructuring efforts should improve performance in
1997. Finally, Ford Motor was recently added, as it should benefit from
management's efforts to improve productivity and profitability through
cost-cutting."


Which sectors in the portfolio improved the Fund's performance in 1996?

"Consumer cyclical stocks, which are economically sensitive, benefited from the
year's positive economic environment. Consequently, the portfolio's overweight
position in the sector in early 1996 improved the Fund's performance. The
strongest consumer cyclical stocks included Knight-Ridder Newspapers and Tribune
in publishing, and Woolworth and Liz Claiborne, in retail. As several holdings
reached full valuation at the end of the year, the portfolio's overall weighting
in consumer cyclicals was reduced and profits were taken. The Fund was also
overweight in consumer staples, with consumer goods and food holdings such as
Colgate-Palmolive, Sara Lee, and Campbell Soup, which performed well.

     "Finance and energy were two other strong sectors in the portfolio. The
improving interest rate environment strengthened the financial sector, and
stocks such as Bank of New York, Citicorp, and Household International posted
strong results. In the energy sector, reduced supply improved the pricing
ability of energy companies and, their stocks appreciated. Therefore, the
portfolio's positions in stocks such as Royal Dutch Petroleum, Texaco, and
PanEnergy improved results."


Which sectors impaired the Fund's performance in 1996?

"The basic materials sector, which includes the portfolio's mineral, steel, and
paper issues, suffered throughout the year due to ongoing restructuring problems
and reduced earnings. However, we expect that leading basic materials stocks
should rebound from their currently low historic valuations. Utilities were also
generally weak in 1996, due to continued problems associated with the
deregulation of the industry. Nonetheless, the Fund's utility holdings
outperformed the average of their peers in the markets. Finally, the convertible
markets did not keep pace with the advance of the large-company equity markets.
Convertible issues are often purchased to help meet the Fund's objective of
favorable current income."


What is the outlook?

"The Fund is well positioned for the coming year. The portfolio is reasonably
valued, with a lower average price-to-earnings ratio than the S&P 500. The Fund
will invest in cyclical stocks in 1997, as they appear undervalued, and we will
continue to search for good value in the marketplace. We believe stock selection
will be extremely important in 1997, as market participants should focus
increasingly on fundamentals. We remain committed to maintaining a broadly
diversified portfolio, holding companies with reasonable current income and
solid long-term prospects for earnings and dividend growth."


4
<PAGE>
 
================================================================================
SELIGMAN COMMON STOCK FUND, INC.
- --------------------------------------------------------------------------------

DIVERSIFICATION OF ASSETS
December 31, 1996
<TABLE>
<CAPTION>


                                                                                             PERCENT OF NET ASSETS
                                                                                                 DECEMBER 31,
                                                                                          --------------------------
                                                  ISSUES        COST              VALUE         1996       1995
                                                  ------    ------------      ------------      -----     -----
NET CASH AND SHORT-TERM HOLDINGS                    4        $93,765,814      $ 93,765,814       12.9       5.2
                                                  ---       ------------      ------------      -----     -----
<S>                                              <C>        <C>               <C>               <C>       <C>
COMMON STOCKS:
Advertising ................................        1          4,272,125         9,150,000        1.2       1.1
Aerospace/Defense ..........................        4         17,020,847        21,562,500        3.0       1.8
Apparel and Textiles .......................        1          2,634,496         5,793,750        0.8       1.2
Automotive and Related .....................        7         17,823,627        18,849,283        2.6       1.6
Chemicals ..................................        4         11,699,121        18,254,448        2.5       3.2
Computer Goods and Services ................        2          8,721,980         8,612,500        1.2        --
Construction ...............................        1          3,606,295         5,600,000        0.8       0.6
Consumer Goods and Services ................        9         28,692,118        49,639,274        6.8       9.1
Drugs and Health Care ......................        6         12,493,808        21,752,676        3.0       5.7
Electric and Gas Utilities .................        8         35,937,882        42,914,533        5.9       6.3
Electronics ................................        4         15,263,438        19,779,497        2.7       0.9
Energy .....................................        8         27,544,742        54,916,227        7.6       7.5
Environmental Services .....................        1          2,981,630         2,625,000        0.3        --
Finance and Insurance ......................       19         47,978,934        94,153,334       13.0      11.6
Food .......................................        6         25,032,928        42,150,000        5.8       5.0
Industrial Equipment .......................        7         24,969,427        35,667,590        4.9       3.3
Leisure and Entertainment ..................        2          1,450,152         1,621,526        0.2       0.1
Machinery ..................................        2          5,170,798         5,163,298        0.7        --
Metals and Mining ..........................        1          5,564,047         5,637,500        0.8        --
Office Equipment ...........................        1          3,099,900         8,175,000        1.1       1.1
Paper and Packaging ........................        4         16,177,151        18,727,876        2.6       2.4
Printing and Publishing ....................        3          6,603,522         9,965,128        1.4       2.8
Restaurants ................................        1          3,726,200         3,620,000        0.5       0.6
Retail Trade ...............................        4         11,636,303        13,651,922        1.9       5.3
Steel ......................................        3          9,588,251         8,598,750        1.2       0.6
Technology .................................       --                 --                --         --       0.6
Telecommunications .........................        4          4,650,665         4,465,691        0.6       3.2
Telephone Utilities ........................        3         13,692,860        16,250,000        2.2       1.2
Tobacco ....................................        2          7,132,352         8,134,413        1.1       2.1
Transportation .............................        3          5,642,997         6,389,891        0.9       1.7
Miscellaneous/Diversified ..................        3         10,163,225        19,034,375        2.6       3.7
                                                  ---       ------------      ------------      -----     -----
                                                  124        390,971,821       580,855,982       79.9      84.3
                                                  ---       ------------      ------------      -----     -----
Convertible Bonds ..........................       13         31,257,130        33,611,080        4.6       7.5
                                                  ---       ------------      ------------      -----     -----
Convertible Preferred Stocks ...............        6         18,115,852        18,416,250        2.6       3.0
                                                  ---       ------------      ------------      -----     -----
Net Assets .................................      147       $534,110,617      $726,649,126      100.0     100.0
                                                  ===       ============      ============      =====     =====
</TABLE>

                                                                               5
<PAGE>
 
================================================================================
PERFORMANCE  COMPARISON  CHART                                 December 31, 1996
- --------------------------------------------------------------------------------

This chart compares a $10,000 hypothetical investment made in Seligman Common
Stock Fund Class A shares, with and without the maximum initial sales charge of
4.75%, for the 10-year period ended December 31, 1996, to a $10,000 hypothetical
investment made in the Standard & Poor's 500 Composite Stock Price Index (S&P
500) and the Lipper Growth & Income Funds Average (Lipper Growth & Income
Average) for the same period. The performances of Seligman Common Stock Fund
Class B and D shares are not shown in this chart, but are included in the table
on page 7. It is important to keep in mind that the S&P 500 excludes the effect
of any fees or sales charges, and the Lipper Growth & Income Average excludes
the effect of sales charges.


         [The following table represents a chart in the printed piece]


                      SELIGMAN COMMON STOCK FUND -- CLASS A

                  With           Without                      Lipper Growth %
               Sales Charge   Sales Charge    S&P 500 Index   Income Average
               ------------   ------------    -------------   ---------------

12/31/86         9,524.85       10,000.00       10,000.00       10,000.00
                11,299.52       11,863.20       12,135.00       11,681.96
                11,460.68       12,032.41       12,744.18       12,034.89
                11,921.65       12,516.38       13,585.29       12,638.00
12/31/87         9,544.97       10,021.12       10,524.53       10,220.44
                10,024.39       10,524.46       11,123.37       10,958.59
                10,546.35       11,072.46       11,864.19       11,574.78
                10,441.89       10,962.79       11,904.53       11,613.72
12/31/88        10,506.98       11,031.13       12,272.38       11,857.87
                11,112.72       11,667.08       13,142.49       12,621.40
                11,758.16       12,344.72       14,302.97       13,525.41
                12,912.91       13,557.07       15,834.82       14,683.51
12/31/89        13,319.95       13,984.42       16,161.01       14,680.58
                13,190.36       13,848.37       15,674.57       14,323.63
                14,013.39       14,712.45       16,660.50       15,067.83
                11,569.06       12,146.20       14,371.35       13,073.50
12/31/90        12,801.99       13,440.63       15,659.02       14,049.64
                14,903.45       15,646.92       17,934.27       16,067.88
                14,598.63       15,326.90       17,893.03       16,014.81
                15,726.62       16,511.14       18,850.30       16,907.39
12/31/91        16,633.81       17,463.58       20,429.96       18,117.50
                16,911.90       17,755.54       19,913.08       18,119.32
                17,020.05       17,869.08       20,291.43       18,160.18
                17,491.43       18,363.98       20,930.61       18,629.22
12/31/92        18,440.47       19,360.36       21,983.42       19,737.67
                19,335.24       20,299.78       22,944.09       20,657.87
                19,800.57       20,788.32       23,056.52       20,852.18
                20,298.12       21,310.68       23,651.38       21,589.44
12/31/93        21,179.64       22,236.15       24,200.09       22,089.03
                20,185.13       21,192.05       23,282.91       21,437.35
                20,291.95       21,304.20       23,380.69       21,389.12
                21,089.57       22,141.60       24,524.01       22,308.41
12/31/94        20,779.52       21,816.08       24,519.11       21,960.39
                22,547.68       23,672.45       26,907.27       23,733.66
                24,187.02       25,393.57       29,476.91       25,637.64
                25,715.74       26,998.54       31,820.32       27,490.43
12/31/95        26,633.18       27,961.75       33,735.91       28,771.79
                27,983.94       29,379.89       35,547.53       30396.68
                28,974.29       30,419.64       37,140.06       31,421.53
                29,207.84       30,664.83       38,287.68       32,340.50
12/31/96        30,745.01       32,278.66       41,480.88       34,735.20


     Performance data quoted represent changes in prices and assume that all
distributions within the period are invested in additional shares. The rates of
return will vary and the principal value of an investment will fluctuate.
Shares, if redeemed, may be worth more or less than their original cost. Past
performance is not indicative of future investment results.



6
<PAGE>
 
================================================================================
SELIGMAN COMMON STOCK FUND, INC.
- --------------------------------------------------------------------------------

INVESTMENT RESULTS PER SHARE 
TOTAL RETURNS* 
For Periods Ended December 31, 1996

<TABLE>
<CAPTION>
                                                                               AVERAGE ANNUAL
                                                               --------------------------------------------------
                                    CLASS B                                                              CLASS D
                                     SINCE                                                                SINCE
                                   INCEPTION     THREE          ONE          FIVE           10          INCEPTION
                                    4/22/96      MONTHS         YEAR         YEARS         YEARS          5/3/93
                                   ---------     ------        ------       -------       -------        --------
<S>                                <C>            <C>           <C>          <C>           <C>           <C>      
CLASS A                    
With Sales Charge                    n/a          0.25%         9.94%        11.97%        11.89%          n/a
Without Sales Charge                 n/a          5.26         15.44         13.07         12.43           n/a
CLASS B
With 5% CDSL                        4.21%         0.10           n/a           n/a           n/a           n/a
Without CDSL                        9.21          5.07           n/a           n/a           n/a           n/a
CLASS D
With 1% CDSL                         n/a          4.07         13.58           n/a           n/a           n/a
Without CDSL                         n/a          5.07         14.58           n/a           n/a         12.46%
S&P 500**                          15.00+         8.34         22.96         15.22         15.27         18.29++
LIPPER GROWTH &
   INCOME AVERAGE**                12.27+         7.40         20.73         13.89         13.25         15.75++

<CAPTION> 
NET ASSET VALUE
                    DECEMBER 31, 1996   SEPTEMBER 30, 1996    JUNE 30, 1996   MARCH 31, 1996      DECEMBER 31, 1995
                  -------------------- --------------------- --------------  ----------------   --------------------
<S>               <C>                  <C>                   <C>             <C>                <C> 
CLASS A                 $14.89                $15.00             $14.97           $14.83             $14.19
CLASS B                  14.87                 14.97              14.93            14.80+++             n/a
CLASS D                  14.87                 14.97              14.93            14.80              14.16

<CAPTION> 
DIVIDEND AND CAPITAL GAIN INFORMATION
For the Year Ended December 31, 1996
                                                                                         CAPITAL GAIN
                                                                               ---------------------------------
                                     DIVIDENDS PAID      CAPITAL GAINS PAID      REALIZED          UNREALIZED o
                                   ------------------  ----------------------- ------------      ---------------
<S>                                <C>                 <C>                     <C>               <C> 
CLASS A                                   $0.340              $1.115              $1.287             $3.945
CLASS B                                    0.156***            1.115               1.287              3.945
CLASS D                                    0.213               1.115               1.287              3.945

The  performances  of Class B and D shares will be greater than or less than the
performance shown for Class A shares,  based on the differences in sales charges
and fees paid by shareholders.

</TABLE>

- ----------------

*   Return figures reflect any change in price per share and assume the
    investment of dividends and capital gain distributions. Return figures for
    Class A shares are calculated with and without the effect of the initial
    4.75% maximum sales charge. Class A share returns reflect the effect of the
    0.25% Administration, Shareholder Services and Distribution Plan after
    January 1, 1993, only. Returns for Class B shares are calculated with and
    without the effect of the maximum 5% contingent deferred sales load
    ("CDSL"), charged only on certain redemptions made within one year of the
    date of purchase, declining to 1% in the sixth year and 0% thereafter.
    Returns for Class D shares are calculated with and without the effect of the
    1% CDSL, charged only on redemptions made within one year of the date of
    purchase. The rates of return will vary and the principal value of an
    investment will fluctuate. Shares, if redeemed, may be worth more or less
    than their original cost. Past performance is not indicative of future
    investment results.
**  The S&P 500 and the Lipper Growth & Income Average are unmanaged benchmarks
    that assume investment of dividends. The S&P 500 does not reflect fees and
    sales charges and the Lipper Growth & Income Average does not reflect sales
    charges. The monthly performance of the Lipper Growth & Income Average is
    used in the Performance Comparison Chart and the Investment Results per
    Share. Investors may not invest directly in an index or an average.
*** For the period April 22, 1996, to December 31, 1996.
  + From April 30, 1996.
 ++ From April 30, 1993.
+++ As of April 22, 1996.
o   Represents the per share amount of net unrealized appreciation of portfolio
    securities as of December 31, 1996.


                                                                               7
<PAGE>
 
================================================================================
SELIGMAN COMMON STOCK FUND, INC.
- --------------------------------------------------------------------------------



LARGEST PORTFOLIO CHANGES
During Past Three Months

                                        SHARES
                                ------------------------
                                              HOLDINGS
ADDITIONS                         INCREASE    12/31/96
- -----------                      ----------- -----------
Automatic Data Processing ....     100,000     100,000
Burlington Northern Santa Fe .      40,000      40,000
Cooper Industries ............      75,000     150,000
Electronic Data Systems ......     100,000     100,000
Ford Motor ...................     100,000     100,000
Hercules .....................     100,000     100,000
Mead .........................     100,000     100,000
Parker-Hannifin ..............      75,000      75,000
Raytheon .....................     150,000     150,000
Vishay Intertechnology .......     200,000     200,000




                                        SHARES
                                ------------------------
                                              HOLDINGS
REDUCTIONS                        DECREASE    12/31/96
- -------------                    ----------- -----------
Bard (C.R.) ..................     150,000          --        
Coca-Cola ....................     150,000          --
Conrail ......................      50,000          --
Fleet Financial Group ........     150,000          --
General Electric .............      50,000     100,000
Philip Morris ................      75,000          --
Schering-Plough ..............     140,000      75,000
Sears, Roebuck ...............     100,000          --
Unicom .......................     250,000          --
U.S. West ....................     200,000          --


Largest  portfolio changes from previous quarter to current quarter are based on
cost of purchases and proceeds from sales of securities.





LARGEST PORTFOLIO HOLDINGS
At December 31, 1996

SECURITY                                      VALUE
- ---------                                 ------------
Royal Dutch Petroleum ..................   $11,098,750
American International Group ...........    10,825,000
Bank of New York .......................    10,125,000
General Electric .......................     9,887,500
Sara Lee ...............................     9,312,500
Corning (Delaware) .....................     9,250,000
Colgate-Palmolive ......................     9,225,000
Omnicom Group ..........................     9,150,000        
PanEnergy ..............................     9,000,000
Bankers Trust ..........................     8,625,000



8
<PAGE>
 
================================================================================
SELIGMAN COMMON STOCK FUND, INC.
- --------------------------------------------------------------------------------

FEDERAL TAX STATUS OF 1996
DIVIDEND AND GAIN DISTRIBUTIONS
FOR TAXABLE ACCOUNTS

The quarterly dividends paid to Class A, B, and D shareholders in 1996 are
taxable as ordinary income for federal tax purposes. It makes no difference
whether you received them in cash or in shares. Under the Internal Revenue Code,
70% of the dividends paid to Class A, B, and D shareholders has been designated
as qualifying for the dividend received deduction available to corporate
shareholders. In order to claim the dividend received deduction for this
distribution, corporate shareholders must have held the Fund's shares for at
least 46 days.

     A distribution of $0.292 per share from 1995 undistributed net realized
gain, consisting of $0.265 from net long-term and $0.027 from net short-term
gain realized on investments, was paid June 26, 1996, to Class A, B, and D
shareholders. On November 22, 1996, a distribution of $0.823 per share,
consisting of $0.813 from net long-term and $0.010 from net short-term gain
realized on investments in 1996, was paid to Class A, B, and D shareholders. The
distributions from net long-term gain are designated as "capital gain dividends"
for federal income tax purposes and are taxable to shareholders in 1996 as a
long-term gain from the sale of capital assets, no matter how long your shares
have been owned or whether the distribution was paid in additional shares or
cash. However, if shares on which a long-term capital gain distribution was
received are subsequently sold, and such shares were held for six months or less
from date of purchase, any loss on the sale would be treated as long-term to the
extent it offsets the long-term gain distribution. Net short-term gain is
taxable as ordinary income whether paid to you in cash or shares.

     If the distributions were paid in shares, the per share cost basis for
federal income tax purposes is $14.86 for Class A shares, and $14.82 for Class B
and D shares for the June 26 distribution, and $15.05 for Class A shares, and
$15.00 for Class B and Class D shares for the November 22 distribution.

     A year-end statement of account showing activity for 1996, a Form 1099-DIV,
and if applicable, a Form 1099-B have been mailed to each shareholder. The Form
1099-B shows the proceeds of any redemp-tions paid to the shareholder during the
year and reported to the Internal Revenue Service as required by federal
regulations. Form 1099-DIV shows the amounts of the distributions on investments
paid to the shareholder during the year.



                                                                               9
<PAGE>
 
================================================================================
PORTFOLIO OF INVESTMENTS
- --------------------------------------------------------------------------------

                                           SHARES          VALUE
                                           ------          -----
COMMON STOCKS 79.9%
ADVERTISING 1.2%
Omnicom Group
   Worldwide advertising
   agencies............................    200,000    $  9,150,000

AEROSPACE/DEFENSE 3.0%
General Dynamics
   Diversified defense contractor .....     50,000       3,525,000
General Motors (Class H)
   Diversified aerospace
   manufacturer--missiles,
   satellites, and communication
   systems.............................     75,000       4,218,750
Raytheon
   Producer of defense and
   commercial electronics..............    150,000       7,218,750
United Technologies
   Manufacturer of elevators,
   jet engines, flight systems,
   and automotive parts................    100,000       6,600,000
                                                      ------------
                                                        21,562,500
                                                      ------------
APPAREL AND TEXTILES 0.8%
Liz Claiborne
   Designer and distributor of
   women's apparel.....................    150,000       5,793,750
                                                      ------------
AUTOMOTIVE AND
   RELATED 2.6%
Autoliv (ADRs)+
   Swedish supplier of safety
   restraint systems...................     20,000         870,000
Borg-Warner Automotive
   Manufacturer of automotive
   powertrain components...............      6,200         238,700
Echlin
   Manufacturer of brakes and
   auto replacement parts..............    200,000       6,325,000
Federal-Mogul
   Manufacturer of transmission
   products............................    100,000       2,200,000
Ford Motor
   Manufacturer of automobiles,
   trucks, and related parts...........    100,000       3,187,500
Genuine Parts
   Supplier of retail and
   wholesale automotive parts..........    100,000       4,450,000
Volkswagen (ADRs)
   German manufacturer of
   automobiles.........................     19,000       1,578,083
                                                      ------------
                                                        18,849,283
                                                      ------------
CHEMICALS 2.5%
Bayer
   German producer of specialty
   chemicals, pharmaceuticals,
   and plastics........................     76,000       3,081,948
Dow Chemical
   Diversified chemicals...............    100,000       7,837,500
Hercules
   Manufacturer of specialty
   chemicals...........................    100,000       4,325,000
Olin
   Chemicals; defense products
   and ammunition; metals..............     80,000       3,010,000
                                                      ------------
                                                        18,254,448
                                                      ------------
COMPUTER GOODS
   AND SERVICES 1.2%
Automatic Data Processing
   Provider of data processing
   services............................    100,000       4,287,500
Electronic Data Systems
   Provider of computer
   systems and services................    100,000       4,325,000
                                                      ------------
                                                         8,612,500
                                                      ------------
CONSTRUCTION 0.8%
Sherwin-Williams
   Paints and allied products..........    100,000       5,600,000
                                                      ------------

CONSUMER GOODS
   AND SERVICES 6.8%
Adidas
   German manufacturer
   of sporting equipment
   and footwear........................     13,646       1,178,518
Allied Domecq
   International food, drink, and
   hospitality group in the UK.........    230,000       1,798,039
Christian Dior
   French holding company for
   LVMH Moet Hennessy..................     10,000       1,612,717
Colgate-Palmolive
   Household and personal care
   products............................    100,000       9,225,000
Eastman Kodak
   Film and chemicals..................    100,000       8,025,000

- -----------------------
See footnotes on page 15.

10
<PAGE>
 
================================================================================
                                                               December 31, 1996
- --------------------------------------------------------------------------------

                                           SHARES          VALUE
                                           ------          -----
CONSUMER GOODS
   AND SERVICES (continued)
First Brands
   Manufacturer of consumer
   products for homes and
   automobiles.........................    200,000    $  5,675,000
International Flavors &
Fragrances
   Developer and manufacturer
   of flavor and fragrance
   products............................    150,000       6,750,000
PepsiCo
   Soft drinks, consumer
   products............................    250,000       7,312,500
Procter & Gamble
   Household and personal care
   products............................     75,000       8,062,500
                                                      ------------
                                                        49,639,274
                                                      ------------
DRUGS AND
   HEALTH CARE 3.0%
Abbott Laboratories
   Diversified health care
   products............................     75,000       3,806,250
American Home Products
   Pharmaceuticals, food, and
   housewares..........................     60,000       3,517,500
Baxter International, Inc.
   Manufacturer and distributor
   of hospital and laboratory
   products............................     80,000       3,280,000
Bristol-Myers Squibb
   Health and personal care
   products............................     40,000       4,350,000
Novartis*
   Swiss manufacturer of
   pharmaceuticals.....................      1,700       1,942,676
Schering-Plough
   Pharmaceuticals, health and
   personal care products...............    75,000       4,856,250
                                                      ------------
                                                        21,752,676
                                                      ------------
ELECTRIC AND
   GAS UTILITIES 5.9%
Central & South West
   Electric utility.....................   250,000       6,406,250
CINergy
   Holding company for a
   producer, transmitter, and
   distributor of electricity...........   250,000       8,343,750
Empresa Nacional de
Electricidad (ADRs)
   Spanish electric utility.............    50,000       3,500,000
Entergy
   Electric utility.....................   250,000       6,937,500
Hong Kong Electric
   Regional natural gas producer
   and distributor in Hong Kong......... 1,800,000       5,980,994
PECO Energy
   Provider of gas and electricity
   to southeast Pennsylvania............   140,000       3,535,000
VEBA
   Provider of electric energy
   in Germany...........................    45,000       2,586,039
Williams Cos.
   Oil and gas production and
   pipeline.............................   150,000       5,625,000
                                                      ------------
                                                        42,914,533
                                                      ------------
ELECTRONICS 2.7%
AMP
   Manufacturer of electronic
   connectors and systems...............   166,700       6,397,113
Kemet*
   Manufacturer and supplier
   of capacitors........................   124,000       2,759,124
Motorola
   Producer of semiconductors
   and communications
   equipment............................   100,000       6,137,500
Vishay Intertechnology*
   Electronic resistive systems.........   200,000       4,485,760
                                                      ------------
                                                        19,779,497
                                                      ------------
ENERGY 7.6%
Atlantic Richfield
   Oil producer and
   West Coast marketer..................    50,000       6,625,000
Enron
   Pipeline exploration
   and production.......................   150,000       6,468,750
Mobil
   International oil enterprise.........    50,000       6,112,500
PanEnergy
   Producer of oil and gas..............   200,000       9,000,000

- -----------------------
See footnotes on page 15.                                                     11
<PAGE>
 
================================================================================
PORTFOLIO OF INVESTMENTS (continued)
- --------------------------------------------------------------------------------

                                           SHARES          VALUE
                                           ------          -----
ENERGY (continued)
Royal Dutch Petroleum
   International oil services
   in the Netherlands...................    65,000    $ 11,098,750
Schlumberger
   Worldwide energy enterprise..........    75,000       7,490,625
Texaco
   International oil company............    70,000       6,868,750
Total (Class B)
   International oil enterprise
   in France............................    15,396       1,251,852
                                                      ------------
                                                        54,916,227
                                                      ------------
ENVIRONMENTAL
   SERVICES 0.3%
Browning-Ferris Industries
   Solid and liquid waste
   management services..................   100,000       2,625,000
                                                      ------------

FINANCE AND
   INSURANCE 13.0% 
Ahmanson (H.F.)
   Owner of savings institution
   in the US............................   150,000       4,875,000
American International
Group
   International insurance holding
   company..............................   100,000      10,825,000
Aon
   Accident, health, and life
   insurance............................   100,000       6,212,500
AXA-UAP
   French provider of financial
   services and insurance...............    20,045       1,274,538
Banco de Santander (ADSs)....
   Retail banking, financial,
   and financial investment
   services in Spain....................    50,000       3,198,860
Bank of New York
   Commercial bank......................   300,000      10,125,000
Bankers Trust
   Commercial bank......................   100,000       8,625,000
Citicorp
   Global commercial bank...............    50,000       5,150,000
Federal National Mortgage
Association
   Mortgage financing...................   200,000       7,450,000
General Re
   Property casualty reinsurer..........    50,000       7,887,500
Great Western Financial
   Savings and loan in California
   and Florida..........................   200,000       5,800,000
Grupo Financiero Banamex
Accival (Class B)
   Financial company involved
   in banking and stockbroking
   in Mexico............................   551,000       1,150,217
Household International
   Consumer loans, credit cards,
   equity loans, and life
   insurance............................    40,000       3,690,000
HSBC Holdings
   UK provider of banking and
   financial services...................    50,000       1,069,882
ING Groep
   Banking and insurance
   services group in the
   Netherlands..........................   100,636       3,621,801
Irish Life
   Provider of  insurance and
   related products in the UK...........   380,000       1,766,786
Mellon Bank
   Commercial banking...................    70,000       4,970,000
National Australia Bank
(ADRs)
   Commercial bank
   in Australia.........................    50,000       2,943,750
St. Paul Companies
   Property and casualty
   insurance............................    60,000       3,517,500
                                                      ------------
                                                        94,153,334
                                                      ------------
FOOD 5.8%
Campbell Soup
   Canned soup and other food
   products............................    100,000       8,025,000
ConAgra
   Prepared foods and
   agricultural products...............    150,000       7,462,500
CPC International
   International food processor........    100,000       7,750,000
General Mills
   Consumer foods......................    100,000       6,337,500
Sara Lee
   Processed foods, consumer
   products............................    250,000       9,312,500
Sysco
   Food distributor....................    100,000       3,262,500
                                                      ------------
                                                        42,150,000
                                                      ------------
- -----------------------
See footnotes on page 15.

12
<PAGE>
 
================================================================================
                                                               December 31, 1996
- --------------------------------------------------------------------------------

                                           SHARES          VALUE
                                           ------          -----
INDUSTRIAL EQUIPMENT 4.9%
BTR
   Global UK company that
   manufactures a broad range
   of industrial goods.................    320,000    $  1,556,320
Cooper Industries
   Manufacturer of electrical,
   industrial, and automotive
   products............................    150,000       6,318,750
Emerson Electric
   Electric motors, hand-held tools,
   and miscellaneous electric
   equipment...........................     50,000       4,837,500
General Electric
   Electrical equipment................    100,000       9,887,500
General Signal
   Electrical equipment................    200,000       8,550,000
Mannesmann
   Plant and machinery
   construction; trading;
   automotive technology
   in Germany..........................      4,000       1,720,000
Pacific Dunlop
   Australian diversified
   manufacturing company...............  1,100,000       2,797,520
                                                      ------------
                                                        35,667,590
                                                      ------------
LEISURE AND
   ENTERTAINMENT 0.2%
Mandarin Oriental
   Owner and operator of major
   hotels throughout Asia
   in Hong Kong........................    300,000         423,000
Television Broadcast
   Television producer and
   broadcaster in the UK...............    300,000       1,198,526
                                                      ------------
                                                         1,621,526
                                                      ------------
MACHINERY 0.7%
Ingersoll-Rand
   Manufacturer of machinery,
   equipment, bearings,
   and tools...........................     50,000       2,245,175
Parker-Hannifin
   Manufacturer of
   motion-control products.............     75,000       2,918,123
                                                      ------------
                                                         5,163,298
                                                      ------------
METALS AND MINING 0.8%
Reynolds Metals
   Manufacturer of finished
   aluminum products...................    100,000   $   5,637,500
                                                      ------------
OFFICE EQUIPMENT 1.1%
Pitney Bowes
   Postage meters, office
   equipment...........................    150,000       8,175,000
                                                      ------------
PAPER AND
   PACKAGING 2.6%
International Paper
   Paper and paper products,
   specialty products, wood
   and timber..........................    175,000       7,065,625
Kimberly-Clark
   Consumer paper products,
   newsprint...........................     50,000       4,762,500
Mead
   Manufacturer of paper, lumber
   and wood products...................    100,000       5,812,500
Stora Kopparbergs (Class B)
   Manufacturer of forestry
   products in Sweden..................     80,000       1,087,251
                                                      ------------
                                                        18,727,876
                                                      ------------
PRINTING AND
   PUBLISHING 1.4%
Elsevier
   Global printer and publisher of
   professional trade journals and
   magazines in the Netherlands........    130,000       2,196,378
Knight-Ridder Newspapers
   Newspapers, business
   information services................    100,000       3,825,000
Tribune
   Book publishing,
   newsprint operations................     50,000       3,943,750
                                                      ------------
                                                         9,965,128
                                                      ------------

RESTAURANTS 0.5%
McDonald's
   Fast-food restaurants...............     80,000       3,620,000
                                                      ------------
RETAIL TRADE 1.9%
May Department Stores
   Department store chain..............    100,000       4,675,000
Tesco
   Supermarket chain in the UK.........    184,600       1,120,672

- -----------------------
See footnotes on page 15.                                                     13
<PAGE>
 
================================================================================
PORTFOLIO OF INVESTMENTS (continued)
- --------------------------------------------------------------------------------

                                           SHARES          VALUE
                                           ------          -----
RETAIL TRADE (continued)
Wal-Mart
   Discount retail chain...............    200,000     $ 4,575,000
Woolworth
   Discount and variety retailer.......    150,000       3,281,250
                                                      ------------
                                                        13,651,922
                                                      ------------
STEEL 1.2%
Nucor
   Mini-mill steel
   production..........................     60,000       3,060,000
Pohang Iron & Steel (ADRs)
   Korean steel manufacturer...........     40,000         810,000
Worthington Industries
   Manufacturer of metal
   and plastic products................    260,000       4,728,750
                                                      ------------
                                                         8,598,750
                                                      ------------
TELECOMMUNICATIONS 0.6%
Alcatel Alsthom
   Communications systems;
   energy; transportation in
   France..............................     17,000       1,365,240
Indosat (ADRs)
   International
   telecommunications in
   Indonesia...........................     13,100         358,613
Tele Danmark (ADSs)
   Domestic and international
   phone services in Denmark...........     70,000       1,907,500
Telecom Italia-Di Risp
   Telecommunications
   services in Italy...................    585,000         834,338
                                                      ------------
                                                         4,465,691
                                                      ------------
TELEPHONE UTILITIES 2.2%
ALLTEL
   Telecommunications/data
   processing services.................    250,000       7,843,750
Frontier
   Telephone utility...................    200,000       4,525,000
SBC Communications
   Provider of telephone services,
   primarily in the Midwest............     75,000       3,881,250
                                                      ------------
                                                        16,250,000
                                                      ------------
TOBACCO 1.1%
B.A.T. Industries
   UK financial services and
   tobacco company.....................    200,000      1,659,413


                                         SHARES OR
                                        PRIN. AMOUNT               
                                        ------------               
UST Inc.
   Tobacco and beverages...............    200,000 shs.  6,475,000
                                                      ------------
                                                         8,134,413
                                                      ------------
TRANSPORTATION 0.9%
British Airways (ADRs)
   International airline in
   the UK..............................     21,000       2,142,000
Burlington Northern Santa Fe
   Freight railroad system.............     40,000       3,492,264
Jurong Shipyard
   Ship repair company in
   Singapore...........................    150,000         755,627
                                                      ------------
                                                         6,389,891
                                                      ------------
MISCELLANEOUS/
   DIVERSIFIED 2.6%
Corning (Delaware)
   Specialty glass products............    200,000       9,250,000
Minnesota Mining &
Manufacturing
   Consumer and industrial goods
   and services........................     50,000       4,143,750
Tenneco
   Natural gas pipelines; ship-
   building; auto parts; chemicals;
   plastic packaging...................    125,000       5,640,625
                                                      ------------
                                                        19,034,375
                                                      ------------
TOTAL COMMON STOCKS
   (Cost $390,971,821) ................                580,855,982
                                                      ------------


CONVERTIBLE BONDS   4.6%

INSURANCE 0.1%
Liblife International
   6 1/2%, 9/30/2004................... $1,000,000       1,144,375
                                                      ------------

LEISURE AND RELATED 0.3%
Bell Sports
   4 1/4%, 11/15/2000..................  2,500,000       1,937,500
                                                      ------------

RETAIL TRADE 0.7%
The Pep Boys
   4%, 9/1/1999........................  5,000,000       5,012,500
                                                      ------------

TECHNOLOGY 1.7%
Bay Networks
   5 1/4%, 5/15/2003+ .................  3,500,000       3,158,750
BroadBand Technologies
   5%, 5/15/2001+ .....................  4,250,000       3,251,250

- -----------------------
See footnotes on page 15.

14
<PAGE>
 
================================================================================
                                                               December 31, 1996
- --------------------------------------------------------------------------------

                                         PRIN. AMT.
                                         OR SHARES         VALUE
                                        ------------       -----
TECHNOLOGY (continued)
Data General
   7 3/4%, 6/1/2001..................... $ 3,000,000   $  3,090,000
Xilinx
   5 1/4%, 11/1/2002+ .................   3,000,000       2,985,000
                                                       ------------
                                                         12,485,000
                                                       ------------
TRANSPORTATION 0.2%
Nippon Yusen (Japan)
   2%, 9/29/2000....................... 140,000,000**     1,313,405
                                                       ------------

MISCELLANEOUS/
   DIVERSIFIED 1.6%
Cirrus Logic*
   6%, 12/15/2003...................... $   580,000         531,425
MascoTech
   4 1/2%, 12/15/2003..................   3,000,000       2,437,500
Teco Electric & Machinery
   2 3/4%, 4/15/2004....................  1,500,000       1,119,375
Thermo Electron
   5%, 4/15/2001+ .....................   3,000,000       5,430,000
TriMas
   5%, 8/1/2003........................   2,000,000       2,200,000
                                                       ------------
                                                         11,718,300
                                                       ------------
TOTAL CONVERTIBLE BONDS
   (Cost $31,257,130) .................                  33,611,080
                                                       ------------

CONVERTIBLE
   PREFERRED STOCKS 2.6%

INSURANCE 0.7%
Alexander & Alexander
    (Series A) $3.625+ ................   100,000 shs.    5,200,000
                                                       ------------
PAPER 0.3%
International Paper $4.00+ ...........     40,000         1,830,000
                                                       ------------
RETAIL TRADE 0.5%
Kmart Financing 73/4%.................     75,000         3,656,250
                                                       ------------
TELECOMMUNICATIONS 0.2%
Mobile Telecommunication
Technologies $2.25+ ..................     75,000         1,368,750
                                                       ------------
TRANSPORTATION 0.9%
GATX $3.875...........................     70,000         4,086,250
Sea Containers $4.00..................     50,000         2,275,000
                                                       ------------
                                                          6,361,250
                                                       ------------

                                         PRINCIPAL
                                           AMOUNT                
                                        ------------             
TOTAL CONVERTIBLE
   PREFERRED STOCKS
   (Cost $18,115,852) ................                   18,416,250
                                                      -------------

SHORT-TERM HOLDINGS 15.8%
Canadian Imperial Bank of
Commerce (Canada), Grand
 Cayman Fixed Time Deposit,
   6 1/2%, 1/2/1997....................$29,000,000       29,000,000
First National Bank of
Chicago, Grand Cayman Fixed
 Time Deposit,
   6 1/4%, 1/2/1997.................... 29,000,000       29,000,000
National Westminster Bank,
 Nassau Fixed Time Deposit,
   6 1/2%, 1/2/1997.................... 29,000,000       29,000,000
Republic National Bank of
New York, Grand Cayman
 Fixed Time Deposit,
   6 3/4%, 1/2/1997.................... 28,095,000       28,095,000
                                                       ------------
TOTAL SHORT-TERM
   HOLDINGS
   (Cost $115,095,000).................                 115,095,000
                                                       ------------
TOTAL INVESTMENTS 102.9%
   (Cost $555,439,803) ................                 747,978,312

OTHER ASSETS LESS
   LIABILITIES (2.9)%  ................                 (21,329,186)
                                                       ------------

NET ASSETS    100.0%  .................                $726,649,126
                                                       ============

- ----------------------
  *Non-income producing security.
 **Principal amount reported in Japanese yen.
  +Rule 144A security.
Descriptions of companies have not been audited by Deloitte & Touche LLP.
See Notes to Financial Statements.


                                                                              15
<PAGE>
 
================================================================================
STATEMENT OF ASSETS AND LIABILITIES                            December 31, 1996
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
<S>                                                                           <C>               <C>          
ASSETS:
Investments, at value:
    Common stocks and convertible securities (cost $440,344,803) ......      $632,883,312
    Short-term holdings (cost $115,095,000) ...........................       115,095,000       $ 747,978,312
                                                                             ------------

Cash...................................................................                             2,448,838
Receivable for dividends and interest .................................                             1,470,327
Receivable for Capital Stock sold .....................................                               769,854
Investment in, and expenses prepaid to, shareholder service agent .....                               162,748
Other..................................................................                                39,793
                                                                                                -------------
TOTAL ASSETS ..........................................................                           752,869,872
                                                                                                -------------

LIABILITIES:
Payable for securities purchased.......................................                            24,450,051
Payable for Capital Stock repurchased..................................                               606,208
Accrued expenses, taxes, and other.....................................                             1,164,487
                                                                                                -------------
TOTAL LIABILITIES .....................................................                            26,220,746
                                                                                                -------------
NET ASSETS  ...........................................................                          $726,649,126
                                                                                                =============


COMPOSITION OF NET ASSETS:
Capital Stock, at par ($0.50 par value; 500,000,000 shares authorized;
   48,806,308 shares outstanding):
   Class A.............................................................                         $  22,035,976
   Class B.............................................................                               216,927
   Class D.............................................................                             2,150,251
Additional paid-in capital.............................................                           484,194,169
Undistributed net investment income....................................                             1,123,357
Undistributed net realized gain........................................                            24,386,959
Net unrealized appreciation of investments.............................                           191,659,367
Net unrealized appreciation on translation of assets and liabilities
  denominated in foreign currencies....................................                               882,120
                                                                                                -------------
NET ASSETS ............................................................                          $726,649,126
                                                                                                =============
NET ASSET VALUE PER SHARE:
   CLASS A ($656,260,287 / 44,071,952 SHARES)..........................                                $14.89
                                                                                                       ======
   CLASS B ($6,450,530  / 433,854 SHARES)..............................                                $14.87
                                                                                                       ======
   CLASS D ($63,938,309 / 4,300,502 SHARES)............................                                $14.87
                                                                                                       ======
</TABLE>

- ----------------------------
See Notes to Financial Statements.



16
<PAGE>
 
================================================================================
STATEMENT OF OPERATIONS                                        December 31, 1996
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
<S>                                                               <C>                <C>
INVESTMENT INCOME:
Dividends......................................................  $19,102,268
Interest.......................................................    4,921,331
Other..........................................................      404,872
                                                                 -----------

TOTAL INVESTMENT INCOME (net of foreign taxes                     
   withheld of $208,484) ......................................                      $24,428,471

EXPENSES:                                                         
Management fee.................................................    4,516,946
Distribution and service fees..................................    2,092,766
Shareholder account services...................................    1,131,395
Custody and related services...................................      230,000
Registration...................................................      139,916
Shareholder reports and communications.........................      129,360
Auditing and legal fees........................................       80,682
Directors' fees and expenses...................................       38,252
Shareholders' meeting..........................................       27,193
Miscellaneous..................................................       49,424
                                                                 -----------
TOTAL EXPENSES ................................................                        8,435,934
                                                                                     -----------
   Net Investment Income.......................................                       15,992,537

NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS
   AND FOREIGN CURRENCY TRANSACTIONS:
Net realized gain on investments...............................   62,861,837
Net realized loss from foreign currency transactions...........       (9,298)
Net change in unrealized appreciation of investments...........   20,969,267
Net change in unrealized appreciation on translation of 
    assets and liabilities denominated 
    in foreign currencies......................................     (158,076)
                                                                 -----------

Net Gain on Investments and Foreign Currency Transactions......                       83,663,730
                                                                                     -----------
Increase in Net Assets from Operations.........................                      $99,656,267
                                                                                     ===========

</TABLE>


- ---------------------------
See Notes to Financial Statements.



                                                                              17
<PAGE>
 
================================================================================
STATEMENT OF CHANGES IN NET ASSETS                                              
- --------------------------------------------------------------------------------

                                                    YEAR ENDED DECEMBER 31,
                                                 -------------------------------
                                                      1996             1995
                                                 --------------   --------------
OPERATIONS:
Net investment income.......................     $ 15,992,537      $ 15,264,706
Net realized gain on investments............       62,861,837        55,017,101
Net realized gain (loss) from foreign 
  currency transactions.....................           (9,298)          225,127
Net change in unrealized appreciation 
  of investments............................       20,969,267        76,349,692
Net change in unrealized appreciation on 
  translation of assets and liabilities 
  denominated in foreign currencies.........         (158,076)          351,103
                                                 ------------      ------------
Increase in net assets from operations......       99,656,267       147,207,729
                                                 ------------      ------------

DISTRIBUTIONS TO SHAREHOLDERS:
Net investment income:......................
 Class A....................................      (14,590,224)      (14,964,866)
 Class B....................................          (34,814)               --
 Class D....................................         (813,879)         (491,306)
Net realized gain on investments:
 Class A....................................      (47,224,171)      (38,904,062)
 Class B....................................         (297,882)               --
 Class D....................................       (4,385,491)       (2,848,693)
                                                 ------------      ------------
Decrease in net assets from distributions...      (67,346,461)      (57,208,927)
                                                 ------------      ------------ 

                                                          (Continued on page 19)



18
<PAGE>
 
================================================================================
STATEMENT OF CHANGES IN NET ASSETS (continued)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>

                                                        SHARES
                                          ----------------------------------
                                                YEAR ENDED DECEMBER 31,                 YEAR ENDED DECEMBER 31,
                                          ----------------------------------     -------------------------------------
CAPITAL SHARE TRANSACTIONS:*                    1996              1995                  1996              1995
                                           --------------    --------------       ----------------  ----------------
<S>                                            <C>               <C>               <C>               <C>           
Net proceeds from sale of shares:
 Class A.................................      2,178,472         2,595,379         $   32,299,564    $   35,934,717
 Class B.................................        430,908                --              6,449,796                --
 Class D.................................      1,319,042         1,887,144             19,486,806        26,182,816
Investment of dividends:
 Class A.................................        527,914           540,438              7,838,581         7,493,573
 Class B.................................          2,114                --                 31,288                --
 Class D.................................         50,273            29,748                745,246           415,449
Exchanged from associated Funds:
 Class A.................................      5,995,029         2,312,459             89,181,764        33,357,990
 Class B.................................          9,871                --                146,507                --
 Class D.................................        481,390           629,898              7,120,548         9,013,077
Shares issued in payment of 
 gain distributions:
 Class A.................................      2,201,193         1,917,613             33,016,448        26,922,726
 Class B.................................         17,548                --                262,950                --
 Class D.................................        273,306           192,465              4,087,158         2,696,370
                                             -----------      ------------         --------------     -------------
Total....................................     13,487,060        10,105,144            200,666,656       142,016,718
                                             -----------      ------------         --------------     -------------
Cost of shares repurchased:
 Class A.................................     (4,436,075)       (3,546,666)           (65,928,248)      (49,307,504)
 Class B.................................         (5,175)               --                (77,652)               --
 Class D.................................       (502,645)         (213,657)            (7,458,967)       (2,986,437)
Exchanged into associated Funds:
 Class A.................................     (5,701,122)       (2,672,563)           (84,564,193)      (37,994,566)
 Class B.................................        (21,412)               --               (324,343)               --
 Class D.................................       (610,189)         (430,578)            (8,937,833)       (6,135,330)
                                             -----------      ------------         --------------     -------------
Total....................................    (11,276,618)       (6,863,464)          (167,291,236)      (96,423,837)
                                             -----------      ------------         --------------     -------------
Increase in net assets from
   capital share transactions ...........      2,210,442         3,241,680             33,375,420        45,592,881
                                             ===========      ============         --------------     -------------
Increase in Net Assets....................................................             65,685,226       135,591,683
NET ASSETS:
Beginning of year.........................................................            660,963,900       525,372,217
                                                                                   --------------     -------------
End of year (including undistributed net investment income of
   $1,123,357 and $537,697, respectively).................................           $726,649,126      $660,963,900
                                                                                   ==============     =============

- -----------------------
*The Fund began offering Class B shares on April 22, 1996.
 See Notes to Financial Statements.

</TABLE>
                                                                              19
<PAGE>
 
================================================================================
NOTES TO FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------

1. Seligman Common Stock Fund, Inc. (the "Fund") offers three classes of shares.
All shares existing prior to May 3, 1993, the commencement of Class D shares,
were classified as Class A shares. The Fund began offering Class B shares on
April 22, 1996. Class A shares are sold with an initial sales charge of up to
4.75% and a continuing service fee of up to 0.25% on an annual basis. Class A
shares purchased in an amount of $1,000,000 or more are sold without an initial
sales charge but are subject to a contingent deferred sales load ("CDSL") of 1%
on redemptions within eighteen months of purchase. Class B shares are sold
without an initial sales charge but are subject to a distribution fee of up to
0.75% and a service fee of up to 0.25% on an annual basis, and a CDSL, if
applicable, of 5% on redemptions in the first year after purchase, declining to
1% in the sixth year and 0% thereafter. Class B shares will automatically
convert to Class A shares on the last day of the month that precedes the eighth
anniversary of their date of purchase. Class D shares are sold without an
initial sales charge but are subject to a distribution fee of up to 0.75% and a
service fee of up to 0.25% on an annual basis, and a CDSL of 1% imposed on
certain redemptions made within one year of purchase. The three classes of
shares represent interests in the same portfolio of investments, have the same
rights and are generally identical in all respects except that each class bears
its separate distribution and certain other class expenses, and has exclusive
voting rights with respect to any matter on which a separate vote of any class
is required. 

2. Significant accounting policies followed, all in conformity with generally
accepted accounting principles, are given below: 

a. Investments in common stocks and convertible securities are valued at current
   market values or, in their absence, at fair values determined in accordance
   with procedures approved by the Board of Directors. Securities traded on
   national exchanges are valued at last sales prices or, in their absence and
   in the case of over-the-counter securities, a mean of bid and asked prices.
   Short-term holdings maturing in 60 days or less are valued at amortized cost.

b. The books and records of the Fund are maintained in US dollars. The market
   value of investment securities and other assets and liabilities denominated
   in foreign currencies are translated into US dollars at the closing daily
   rate of exchange as reported by a pricing service. Purchases and sales of
   investment securities, income, and expenses are translated into US dollars at
   the rate of exchange prevailing on the respective dates of such transactions.
  
        The Fund separates that portion of the results of operations resulting
   from changes in the foreign exchange rates from the fluctuations arising from
   changes in the market prices of securities held in the portfolio. Similarly,
   the Fund separates the effect of changes in foreign exchange rates from the
   fluctuations arising from changes in the market prices of portfolio
   securities sold during the period.

c. There is no provision for federal income or excise tax. The Fund has elected
   to be taxed as a regulated investment company and intends to distribute
   substantially all taxable net income and net gain realized. 

d. Investment transactions are recorded on trade dates. Identified cost of
   investments sold is used for both financial statement and federal income tax
   purposes. Dividends receivable and payable are recorded on ex-dividend dates.
   Interest income is recorded on an accrual basis. 

e. All income, expenses (other than class-specific expenses), and realized and
   unrealized gains or losses are allocated daily to each class of shares based
   upon the relative value of shares of each class. Class-specific expenses,
   which include distribution and service fees and any other items that are
   specifically attributed to a particular class, are charged directly to such
   class. For the year ended December 31, 1996, distribution and service fees
   were the only class-specific expenses. 


20
<PAGE>
 
================================================================================

- --------------------------------------------------------------------------------

f. The treatment for financial statement purposes of distributions made during
   the year from net investment income or net realized gain may differ from
   their ultimate treatment for federal income tax purposes. These differences
   are caused primarily by differences in the timing of the recognition of
   certain components of income, expense, or realized capital gain; and the
   recharacterization of foreign exchange gains or losses to either ordinary
   income or realized capital gains for federal income tax purposes. Where such
   differences are permanent in nature, they are reclassified in the components
   of net assets based on their ultimate characterization for federal income tax
   purposes. Any such reclassification will have no effect on net assets,
   results of operations, or net asset value per share of the Fund.

3. Purchases and sales of portfolio securities, excluding US Government
obligations and short-term investments, for the year ended December 31, 1996,
amounted to $361,296,187 and $438,807,053, respectively.

   At December 31, 1996, the cost of investments for federal income tax purposes
was substantially the same as the cost for financial reporting purposes, and the
tax basis gross unrealized appreciation and depreciation of portfolio
securities, including the effects of foreign currency translations, amounted to
$203,126,166 and $10,587,657, respectively.

4. J. & W. Seligman & Co. Incorporated (the "Manager") manages the affairs of
the Fund and provides the necessary personnel and facilities. Compensation of
all officers of the Fund, all directors of the Fund who are employees or
consultants of the Manager, and all personnel of the Fund and the Manager is
paid by the Manager. The Manager receives a fee, calculated daily and payable
monthly, equal to 0.65% per annum of the first $1 billion of the Fund's average
daily net assets, 0.60% per annum of the next $1 billion of the Fund's average
daily net assets, and 0.55% per annum of the Fund's average daily net assets in
excess of $2 billion. Prior to January 1, 1996, the management fee rate was
calculated on a sliding scale of 0.50% to 0.44%, based on average daily net
assets of all the investment companies managed by the Manager. The management
fee reflected in the Statement of Operations represents 0.65% per annum of the
Fund's average daily net assets. Seligman Henderson Co. (the "Subadviser"), an
entity owned 50% each by the Manager and Henderson plc, is entitled to a portion
of the Manager's fee for acting as Subadviser for certain of the international
investments of the Fund. 

   Seligman Financial Services, Inc. (the "Distributor"), agent for the
distribution of the Fund's shares and an affiliate of the Manager, received
concessions of $102,883 from sales of Class A shares, after commissions of
$797,266 paid to dealers.

   The Fund has an Administration, Shareholder Services and Distribution Plan
(the "Plan") with respect to distribution of its shares. Under the Plan, with
respect to Class A shares, service organizations can enter into agreements with
the Distributor and receive a continuing fee of up to 0.25% on an annual basis,
payable quarterly, of the average daily net assets of the Class A shares
attributable to the particular service organizations for providing personal
services and/or the maintenance of shareholder accounts. The Distributor charges
such fees to the Fund pursuant to the Plan. For the year ended December 31,
1996, fees incurred aggregated $1,516,877, or 0.24% per annum of the average
daily net assets of Class A shares.

   Under the Plan, with respect to Class B and Class D shares, service
organizations can enter into agreements with the Distributor and receive a
continuing fee for providing personal services and/or the maintenance of
shareholder accounts of up to 0.25% on an annual basis of the average daily net
assets of the Class B and Class D shares for which the organizations are
responsible; and, for Class D shares only, fees for providing other distribution
assistance of up to 0.75% on an annual basis of such average daily net assets.
Such fees are paid monthly by the Fund to the Distributor pursuant to the Plan.

  
                                                                              21
<PAGE>
 
================================================================================
NOTES TO FINANCIAL STATEMENTS (continued)
- --------------------------------------------------------------------------------

   With respect to Class B shares, a distribution fee of up to 0.75% on an
annual basis of average daily net assets is payable monthly by the Fund to the
Distributor; however, the Distributor has sold its rights to substantially all
of this fee to a third party (the "Purchaser"), which provided funding to the
Distributor to enable it to pay commissions to dealers at the time of the sale
of the related Class B shares.

   For the year ended December 31, 1996, fees in-curred under the Plan,
equivalent to 1% per annum of the average daily net assets of Class B and Class
D shares, amounted to $20,276 and $555,613, respectively.

   The Distributor is entitled to retain any CDSL imposed on certain redemptions
of Class D shares occurring within one year of purchase. For the year ended
December 31, 1996, such charges amounted to $15,668.

   The Distributor has sold its rights to collect any CDSL imposed on
redemptions of Class B shares to the Purchaser. In connection with the sale of
its rights to collect any CDSL and the distribution fees with respect to Class B
shares described above, the Distributor receives payments from the Purchaser
based on the value of Class B shares sold. The aggregate amount of such payments
and the Class B share distribution fees retained by the Distributor for the year
ended December 31, 1996, was $16,591.

   Seligman Services, Inc., an affiliate of the Manager, is eligible to receive
commissions from certain sales of shares of the Fund, as well as distribution
and service fees pursuant to the Plan. For the year ended December 31, 1996,
Seligman Services, Inc. received commissions of $21,997 from sales of Fund
shares. Seligman Services, Inc. also received distribution and service fees of
$448,975 pursuant to the Plan.

   Seligman Data Corp., owned by the Fund and certain associated investment
companies, charged the Fund at cost $1,131,236 for shareholder account services.
The Fund's investment in Seligman Data Corp. is recorded at a cost of $22,506.

   Certain officers and directors of the Fund are officers or directors of the
Manager, the Subadviser, the Distributor, Seligman Services, Inc., and/or
Seligman Data Corp.

   Fees of $23,000 were incurred by the Fund for legal services of Sullivan &
Cromwell, a member of which firm is a director of the Fund.

   The Fund has a compensation arrangement under which directors who receive
fees may elect to defer receiving such fees. Interest is accrued on the deferred
balances. The annual cost of such fees and interest is included in directors'
fees and expenses, and the accumulated balance thereof at December 31, 1996, of
$176,853 is included in other liabilities. Deferred fees and the related accrued
interest are not deductible for federal income tax purposes until such amounts
are paid.


22
<PAGE>
 
================================================================================
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------

The Fund's financial highlights are presented below. The per share operating
performance data is designed to allow investors to trace the operating
performance, on a per share basis, from each Class's beginning net asset value
to the ending net asset value so that they can understand what effect the
individual items have on their investment, assuming it was held throughout the
period. Generally, the per share amounts are derived by converting the actual
dollar amounts incurred for each item, as disclosed in the financial statements,
to their equivalent per share amounts.

   The total return based on net asset value measures each Class's performance
assuming investors purchased Fund shares at net asset value as of the beginning
of the period, reinvested dividends and capital gains paid at net asset value,
and then sold their shares at the net asset value per share on the last day of
the period. The total return computations do not reflect any sales charges
investors may incur in purchasing or selling shares of the Fund. The total
returns for periods of less than one year are not annualized.

   Average commission rate paid represents the average commission paid by the
Fund to purchase or sell portfolio securities. It is determined by dividing the
total commission dollars paid by the number of shares purchased and sold during
the period for which commissions were paid. This rate is provided for periods
beginning January 1, 1996. 

<TABLE>
<CAPTION>

                                                                            CLASS A
                                                        --------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,
                                                        --------------------------------------------
                                                        1996o     1995o     1994o     1993      1992
                                                        -----     -----     -----     ----      ----
<S>                                                    <C>       <C>       <C>       <C>       <C>   
PER SHARE OPERATING
  PERFORMANCE: 
Net asset value, beginning of year ............        $14.19    $12.12    $13.47    $12.79    $12.54
                                                       ------    ------    ------    ------    ------
Net investment
income ........................................           .35       .36       .38        39       .39
Net realized and unrealized 
  investment gain (loss) ......................          1.81      3.00      (.64)     1.49       .95
Net realized and unrealized gain on 
  foreign currency transactions ...............            --       .01        --        --        --
                                                       ------    ------    ------    ------    ------
Increase (decrease) from investment
  operations ..................................          2.16      3.37      (.26)     1.88      1.34 
Dividends paid ................................          (.34)     (.36)     (.37)     (.38)     (.39)
Distributions from net gain realized...........         (1.12)     (.94)     (.72)     (.82)     (.70)
                                                       ------    ------    ------    ------    ------
Net increase (decrease) in net asset value ....           .70      2.07     (1.35)      .68       .25
                                                       ------    ------    ------    ------    ------
Net asset value, end of year ..................        $14.89    $14.19    $12.12    $13.47    $12.79
                                                       ======    ======    ======    ======    ======

TOTAL RETURN BASED 
  ON NET ASSET VALUE:..........................         15.44%    28.17%    (1.89)%   14.86%    10.86%

RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets ................          1.15%      .93%      .85%       87%      .75%
Net investment income to average net assets ...          2.36%     2.56%     2.93%     2.86%     3.00%
Portfolio turnover ............................         56.10%    46.08%    57.17%    54.37%    46.78%
Average commission rate paid ..................         $.0554
Net assets, end of year (000s omitted) ........       $656,260  $614,400  $510,956  $553,222  $514,069

</TABLE>


- ------------------
See footnotes on page 24.

                                                                              23
<PAGE>
 
================================================================================
FINANCIAL HIGHLIGHTS (continued)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                CLASS B                             CLASS D
                                               ---------     -------------------------------------------------------
                                                4/22/96*                YEAR ENDED DECEMBER 31,            5/3/93*
                                                  TO         ------------------------------------------      TO
                                               12/31/96o         1996o          1995o          1994o      12/31/93
                                              ----------        -------        -------        ------     -----------
<S>                                              <C>            <C>             <C>            <C>           <C>   
PER SHARE OPERATING
  PERFORMANCE:
Net asset value, beginning of period...........  $14.80         $14.16          $12.07         $13.46        $13.29
                                                 ------         ------          ------         ------        ------
Net investment income..........................     .15            .24             .24            .22           .18
Net realized and unrealized
   investment gain (loss)......................    1.20           1.80            3.00           (.66)         1.02
Net realized and unrealized gain on
   foreign currency transactions...............      --             --            0.01             --            --
                                                 ------         ------          ------         ------        ------
Increase (decrease) from investment
   operations..................................    1.35           2.04            3.25           (.44)         1.20
Dividends paid.................................    (.16)          (.21)           (.22)          (.23)         (.21)
Distributions from net gain realized...........   (1.12)         (1.12)           (.94)          (.72)         (.82)
                                                 ------         ------          ------         ------        ------
Net increase (decrease) in net asset value.....     .07            .71            2.09          (1.39)          .17
                                                 ------         ------          ------         ------        ------
Net asset value, end of period.................  $14.87         $14.87          $14.16         $12.07        $13.46
                                                 ======         ======          ======         ======        ======
TOTAL RETURN BASED
   ON NET ASSET VALUE:                            9.21%         14.58%          27.17%        (3.24)%         9.09%

RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets.................   1.92%+         1.91%           1.72%          1.96%         2.02%+
Net investment income to average net assets....   1.55%+         1.61%           1.80%          1.68%         1.83%+
Portfolio turnover.............................  56.10%++       56.10%          46.08%         57.17%        54.37%+++
Average commission rate paid...................  $.0554++       $.0554
Net assets, end of period (000s omitted).......  $6,451        $63,938         $46,564        $14,416        $5,667

- ------------------
   * Commencement of offering of shares.
   o Per share amounts for the  years/period  ended December 31, 1996,  1995, and
     1994, are calculated based on average shares outstanding.
   + Annualized.
  ++ For the year ended December 31, 1996.
 +++ For the year ended December 31, 1993.
See Notes to Financial Statements.

</TABLE>



24
<PAGE>
 
================================================================================
REPORT OF INDEPENDENT AUDITORS
- --------------------------------------------------------------------------------


The Board of Directors and Shareholders,
Seligman Common Stock Fund, Inc.:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of Seligman Common Stock Fund, Inc. as of
December 31, 1996, the related statements of operations for the year then ended
and of changes in net assets for each of the years in the two-year period then
ended, and the financial highlights for each of the periods presented. These
financial statements and financial highlights are the responsibility of the
Fund's management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits. 

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
December 31, 1996 by correspondence with the Fund's custodians and brokers;
where replies were not received from brokers, we performed other auditing
procedures. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion. 

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Seligman Common
Stock Fund, Inc. as of December 31, 1996, the results of its operations, the
changes in its net assets, and the financial highlights for the respective
stated periods, in conformity with generally accepted accounting principles.


DELOITTE & TOUCHE LLP
New York, New York
January 31, 1997

                                                                              25
<PAGE>
 
================================================================================
BOARD OF DIRECTORS
- --------------------------------------------------------------------------------

FRED E. BROWN
Director and Consultant,
  J. & W. Seligman & Co. Incorporated

JOHN R. GALVIN 2, 4
Dean, Fletcher School of Law and
  Diplomacy at Tufts University
Director, USLIFE Corporation

ALICE S. ILCHMAN 3, 4
President, Sarah Lawrence College
Trustee, Committee for Economic Development
Director, NYNEX
Chairman, The Rockefeller Foundation

FRANK A. MCPHERSON 2, 4
Chairman and CEO, Kerr-McGee Corporation
Director, Kimberly-Clark Corporation
Director, Baptist Medical Center

JOHN E. MEROW
Senior Partner, Sullivan & Cromwell, Law Firm
Director, Commonwealth Aluminum Corporation

BETSY S. MICHEL 2, 4
Director or Trustee,
  Various Organizations

WILLIAM C. MORRIS 1
Chairman
Chairman of the Board,
  J. & W. Seligman & Co. Incorporated
Chairman, Carbo Ceramics Inc.
Director, Kerr-McGee Corporation

JAMES C. PITNEY 3, 4
Partner, Pitney, Hardin, Kipp & Szuch, Law Firm
Director, Public Service Enterprise Group

JAMES Q. RIORDAN 3, 4
Director, The Brooklyn Union Gas Company
Trustee, Committee for Economic Development
Director, Dow Jones & Co., Inc.
Director, Public Broadcasting Service

RONALD T. SCHROEDER 1
Managing Director, J. & W. Seligman & Co.
  Incorporated

ROBERT L. SHAFER 3, 4
Director or Trustee,
  Various Organizations

JAMES N. WHITSON 2, 4
Executive Vice President and Director,
  Sammons Enterprises, Inc.
Director, C-SPAN
Director, Red Man Pipe and Supply Company

BRIAN T. ZINO 1
President
President and Managing Director,
  J. & W. Seligman & Co. Incorporated
Chairman and President,  Seligman Data Corp.


- ---------------------
Member:    1 Executive Committee
           2 Audit Committee
           3 Director Nominating Committee
           4 Board Operations Committee



26
<PAGE>
 
================================================================================
EXECUTIVE OFFICERS
- --------------------------------------------------------------------------------

WILLIAM C. MORRIS
Chairman

BRIAN T. ZINO
President

CHARLES C. SMITH, JR.
Vice President

LAWRENCE P. VOGEL
Vice President

THOMAS G. ROSE
Treasurer

FRANK J. NASTA
Secretary


- --------------------------------------------------------------------------------

MANAGER
J. & W. Seligman & Co. Incorporated
100 Park Avenue
New York, NY 10017

SUBADVISER
Seligman Henderson Co.
100 Park Avenue
New York, NY 10017

GENERAL COUNSEL
Sullivan & Cromwell

INDEPENDENT AUDITORS
Deloitte & Touche LLP

GENERAL DISTRIBUTOR
Seligman Financial Services, Inc.
100 Park Avenue
New York, NY 10017

SHAREHOLDER SERVICE AGENT
Seligman Data Corp.
100 Park Avenue
New York, NY 10017

IMPORTANT TELEPHONE NUMBERS
(800) 221-2450    Shareholder
                  Services

(800) 445-1777    Retirement Plan
                  Services

(800) 622-4597    24-Hour Automated
                  Telephone Access
                  Service




                                                                              27
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234

PART C.  OTHER INFORMATION
- --------------------------
Item 24.  Financial Statements and Exhibits
- -------   ---------------------------------

  (a) Financial Statements and Schedule:
    
Part A  Financial Highlights for Class A shares for the ten years ended December
        31, 1996; Financial Highlights for Class B shares for the period from
        April 22, 1996 (commencement of offering) to December 31, 1996;
        Financial Highlights for Class D shares for the period from May 3, 1993
        (commencement of offering) to December 31, 1996.

Part B  Required Financial Statements are included in the Fund's Annual Report
        to Shareholders, dated December 31 1996, which are incorporated by
        reference in the Statement of Additional Information. These Financial
        Statements are: Portfolio of Investments as of December 31, 1996;
        Statement of Assets and Liabilities as of December 31, 1996; Statement
        of Operations for the year ended December 31, 1996; Statements of
        Changes in Net Assets for the years ended December 31, 1996 and 1995;
        Notes to Financial Statements; Financial Highlights for the five years
        ended December 31, 1996 for the Fund's Class A shares; for the period
        April 22, 1996 (commencement of offering) through December 31, 1996 for
        the Fund's Class B shares; and for the period May 3, 1993 (commencement
        of offering) through December 31, 1996 for the Fund's Class D shares;
        Report of Independent Auditors.
     
(b)   Exhibits:  All Exhibits have been previously filed; except Exhibits marked
      with an asterisk (*) which are incorporated herein.
    
(1) Articles of Amendment and Articles Supplementary to Articles of
    Incorporation of Registrant.*
 
(2) By-laws of the Corporation.*
      
(3) Not applicable.

(4) Specimen certificate of Class B Capital Stock.
    (Incorporated by reference to Form SE filed on behalf of the Registrant on
    April 16, 1996)

(4a) Specimen certificate of Class D Capital Stock. 
     (Incorporated by Reference to Post-Effective Amendment No. 71 filed on
     April 23, 1993.)
    
(5)  Amended Management Agreement between Registrant and J. & W. Seligman & Co.
     Incorporated.
     (Incorporated by reference to Post-Effective Amendment No. 74, filed on
     April 19, 1996.)

(5a) Form of Subadvisory Agreement between the Manager and Seligman Henderson
     Co.
     (Incorporated by reference to Post-Effective Amendment No. 74, filed on
     April 19, 1996.)

(6) Copy of Amended Distributing Agreement between Registrant and Seligman
    Financial Services, Inc.*
 
(6a) Copy of Amended Sales Agreement between Seligman Financial Services, Inc.
     and Dealers.
     (Incorporated by reference to Post-Effective Amendment No. 74, filed on
     April 19, 1996.)
     
    
(6b) Form of Sales Agreement between Seligman Financial Services, Inc. and Dean
     Witter Reynolds, Inc. (Incorporated by reference to Exhibit 6b of
     Registration Statement No. 2-33566, Post Effective Amendment No. 53 filed
     on April 28, 1997.)     
    
(6c) Form of Sales Agreement between Seligman Financial Services, Inc. and Dean
     Witter Reynolds, Inc. with respect to certain Chilean institutional
     investors. (Incorporated by reference to Exhibit 6c of Registration
     Statement No. 2-33566, Post-Effective Amendment No. 53 filed on April 28, 
     1997.)     
    
(6d) Form of Dealer Agreement between Seligman Financial Services, Inc. and
     Smith Barney Inc. (Incorporated by reference to Exhibit 6d of Registration
     Statement No. 2-33566, Post-Effective Amendment No. 53, filed on April 28,
     1997.)     
    
(7)  Matched Accumulation Plan of J. & W. Seligman & Co. Incorporated.
     (Incorporated by Reference to Exhibit 7 of Registration Statement No. 2-
      92487, Post-Effective Amendment No. 21, filed on January 29, 1997.)

(7a) Deferred Compensation Plan for Directors of Seligman Group of Funds.
     (Incorporated by Reference to Exhibit 7a of Registration Statement No. 2-
     92487, Post-Effective Amendment No. 21, filed on January 29, 1997.)

(8) Copy of Custodian Agreement between Registrant and Investors Fiduciary Trust
    Company.*
      
(9) Not applicable.
    
(10) Opinion and Consent of Counsel.*
     
(11) Report and Consent of Independent Auditors.*

<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234

PART C.  OTHER INFORMATION (continued)
         -----------------            
Item 24.  Financial Statements and Exhibits (continued)
- -------   ---------------------------------            

(12)  Not applicable.
    
(13) Purchase Agreement for Initial Capital between Registrant's Class B shares
     and J. & W. Seligman & Co. Incorporated.*

(13a)  Purchase Agreement for Initial Capital between Registrant's Class D
       Shares and J. & W. Seligman & Co. Incorporated.*

(14) The Seligman IRA Plan Agreement.
    (Incorporated by reference to Exhibit 14 of Registration Statement No. 333-
    20621, Pre-Effective Amendment No. 2, filed on April 17, 1997.)

(14a)  The Seligman Simple IRA Plan Set-Up Kit.
    (Incorporated by reference to Exhibit 14 of Registration Statement No. 333-
    20621, Pre-Effective Amendment No. 2, filed on April 17, 1997.)

(14b)  The Seligman Simple IRA Plan Agreement.
    (Incorporated by reference to Exhibit 14 of Registration Statement No. 333-
    20621, Pre-Effective Amendment No. 2, filed on April 17, 1997.)

(15) Form of Administration, Shareholder Services and Distribution Plan of
    Registrant
    (Incorporated by reference to Post-Effective Amendment No. 74, filed on
    April 19, 1996.)

(15a)  Form of Administration, Shareholder Services and Distribution Agreement
    between Seligman Financial Services, Inc. and Dealers.
    (Incorporated by reference to Post-Effective Amendment No. 74, filed on
    April 19, 1996.)

(16) Schedule of Computation of Performance Data provided in Registration
     Statement in response to Item 22.*
      
(17) Financial Data Schedules meeting the requirements of Rule 483 under the
     Securities Act of 1933. *
    
(18) Copy of Multiclass Plan entered into by Registrant pursuant to Rule 18f-3
     under the Investment Company Act of 1940.
    (Incorporated by reference to Post-Effective Amendment No. 74, filed on
    April 19, 1996.)
     
Other Exhibits:  Powers of Attorney

Item 25.  Persons Controlled by or Under Common Control with Registrant -
- -------   -------------------------------------------------------------  
       Seligman Data Corp. ("SDC"), a New York corporation, is owned by the
       Registrant and certain associated investment companies.  The Registrant's
       investment in SDC is recorded at a cost of $22,506.

Item 26.  Number of Holders of Securities
- --------  -------------------------------
<TABLE>    
<CAPTION>
                   (1)                           (2)
                                             Number of Record
               Title of Class          Holders as of March 31, 1997
         ----------------------------  ----------------------------
<S>                                    <C> 
           Class A Common Stock                  19,580
           Class B Common Stock                     710
           Class D Common Stock                   5,039
</TABLE>     
    
Item 27.  Indemnification
- --------  ---------------

       Reference is made to the provisions of Articles Twelfth and Thirteenth of
       Registrant's Amended and Restated Articles of Incorporation filed as
       Exhibit 24(b)(1) and Article IV of Registrant's Amended and Restated By-
       laws filed as Exhibit 24(b)(2) to this Post-Effective Amendment No. 75 to
       the Registration Statement.
     
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234

    PART C.  OTHER INFORMATION (continued)
             -----------------            
    
       Insofar as indemnification for liabilities arising under the Securities
       Act of 1933 may be permitted to directors, officers and controlling
       persons of the registrant pursuant to the foregoing provisions, or
       otherwise, the registrant has been advised by the Securities and Exchange
       Commission such indemnification is against public policy as expressed in
       the Act and is, therefore, unenforceable.  In the event that a claim for
       indemnification against such liabilities (other than the payment by the
       registrant of expenses incurred or paid by a director, officer or
       controlling person of the registrant in the successful defense of any
       action, suit or proceeding) is asserted by such director, officer or
       controlling person in connection with the securities being registered,
       the registrant will, unless in the opinion of its counsel the matter has
       been settled by controlling precedent, submit to a court of appropriate
       jurisdiction the question whether such indemnification by it is against
       public policy as expressed in the Act and will be governed by the final
       adjudication of such issue.

Item 28.  Business and Other Connections of Investment Adviser -  The Manager
- --------  ----------------------------------------------------               
       also serves as investment manager to seventeen associated investment
       companies.  They are Seligman Capital Fund, Inc., Seligman Cash
       Management Fund, Inc., Seligman Communications and Information Fund,
       Inc., Seligman Frontier Fund, Inc., Seligman Growth Fund, Inc., Seligman
       Henderson Global Fund Series, Inc., Seligman High Income Fund Series,
       Seligman Income Fund, Inc., Seligman Municipal Fund Series, Inc.,
       Seligman Municipal Series Trust, Seligman New Jersey Municipal Fund,
       Inc., Seligman Pennsylvania Municipal Fund Series, Seligman Portfolios,
       Inc., Seligman Quality Municipal Fund, Inc., Seligman Select Municipal
       Fund, Inc., Seligman Value Fund Series, Inc. and Tri-Continental
       Corporation.

       The Subadviser also serves as subadviser to nine other associated
       investment companies.  They are Seligman Capital Fund, Inc., Seligman
       Communications and Information Fund, Inc., Seligman Growth Fund, Inc.,
       Seligman Frontier Fund, Inc., Seligman Henderson Global Fund Series,
       Inc., Seligman Income Fund, Inc., certain portfolios of Seligman
       Portfolios, Inc., Seligman Value Fund Series, Inc. and Tri-Continental
       Corporation.

       The Manager and Subadviser have investment advisory service divisions
       which provide investment management or advice to private clients.  The
       list required by this Item 28 of officers and directors of the Manager
       and the Subadviser, respectively, together with information as to any
       other business, profession, vocation or employment of a substantial
       nature engaged in by such officers and directors during the past two
       years, is incorporated by reference to Schedules A and D of Form ADV,
       filed by the Manager and the Subadviser, respectively, pursuant to the
       Investment Advisers Act of 1940 (SEC File No. 801-15798 and SEC File No.
       801-40670 filed on August 7, 1996 and October 2, 1996, respectively).
     
Item 29.  Principal Underwriters
- -------   ----------------------

     (a) The names of each investment company (other than the Registrant) for
         which Registrant's principal underwriter currently distributing
         securities of the Registrant also acts as a principal underwriter,
         depositor or investment adviser follow:

                  Seligman Cash Management Fund, Inc.
                  Seligman Capital Fund, Inc.
                  Seligman Communications and Information Fund, Inc.
                  Seligman Frontier Fund, Inc.
                  Seligman Growth Fund, Inc.
                  Seligman Henderson Global Fund Series, Inc.
                  Seligman High Income Fund Series
                  Seligman Income Fund, Inc.
                  Seligman Municipal Fund Series, Inc.
                  Seligman Municipal Series Trust
                  Seligman New Jersey Municipal Fund, Inc.
                  Seligman Pennsylvania Municipal Fund Series
                  Seligman Portfolios, Inc.
                  Seligman Value Fund Series, Inc.         
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234


PART C.  OTHER INFORMATION (continued)
- ------   -----------------            

        (b)  Name of each director, officer or partner of Registrant's principal
             underwriter named in the answer to Item 21:

                       Seligman Financial Services, Inc.
                       ---------------------------------
                              As of March 31, 1997          
                              --------------------
<TABLE>    
<S>                                  <C>                                 <C>
                 (1)                               (2)                                          (3)
          Name and Principal               Positions and Offices                       Positions and Offices
          Business Address                   with Underwriter                             with Registrant
- -----------------------------------  ---------------------------------   -------------------------------------------------
     WILLIAM C. MORRIS*              Director                            Chairman of the Board and Chief Executive Officer
     BRIAN T. ZINO*                  Director                            Director and President
     RONALD T. SCHROEDER*            Director                            Director
     FRED E. BROWN*                  Director                            None
     WILLIAM H. HAZEN*               Director                            None
     THOMAS G. MOLES*                Director                            None
     DAVID F. STEIN*                 Director                            None
     STEPHEN J. HODGDON*             President                           None
     LAWRENCE P. VOGEL*              Senior Vice President, Finance      Vice President
     ED LYNCH*                       Senior Vice President, Director     None
                                     of Marketing
     MARK R. GORDON*                 Senior Vice President, National     None
                                     Sales Manager
     GERALD I. CETRULO, III          Senior Vice President of Sales,     None
     140 West Parkway                Regional Sales Manager
     Pompton Plains, NJ  07444
     BRADLEY F. HANSON               Senior Vice President of Sales,     None
     9707 Xylon Court                Regional Sales Manager
     Bloomington, MN  55438
     BRADLEY W. LARSON               Senior Vice President of Sales,     None
     367 Bryan Drive                 Regional Sales Manager
     Danville, CA  94526
     D. IAN VALENTINE                Senior Vice President of Sales,     None
     307 Braehead Drive              Regional Sales Manager
     Fredericksburg, VA  22401
     HELEN SIMON*                    Vice President, Sales               None
                                     Administration Manager
     KAREN J. BULLOT*                Vice President, Retirement Plans    None
     JOHN CARL*                      Vice President, Marketing           None
     MARSHA E. JACOBY*               Vice President, National Accounts   None
                                     Manager
     WILLIAM W. JOHNSON*             Vice President, Order Desk          None
     JAMES R. BESHER                 Regional Vice President             None
     14000 Margaux Lane
     Town & Country, MO  63017
     RICHARD B. CALLAGHAN            Regional Vice President             None
     7821 Dakota Lane
     Orland Park, IL  60462
     BRADFORD C. DAVIS               Regional Vice President             None
     255 4th Avenue, #2
     Kirkland, WA  98033
     CHRISTOPHER J. DERRY            Regional Vice President             None
     2380 Mt. Lebanon Church Road
     Alvaton, KY  42122
     ANDREW DRALUCK                  Regional Vice President             None
     4215 N. Civic Center
     Blvd #273
     Scottsdale, AZ 85251
</TABLE>     
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234

PART C.  OTHER INFORMATION (continued)
- ------   -----------------            

                       Seligman Financial Services, Inc.
                       ---------------------------------
                              As of March 31, 1997       
                              --------------------
<TABLE>    
<CAPTION> 
           (1)                                     (2)                                 (3)
     Name and Principal                   Positions and Offices                Positions and Offices
      Business Address                      with Underwriter                      with Registrant
- --------------------------------------  ------------------------------------   ---------------------
<S>                                     <C>                                    <C>
     JONATHAN G. EVANS                  Regional Vice President                None
     222 Fairmont Way
     Ft. Lauderdale, FL  33326
     MICHAEL C. FORGEA                  Regional Vice President                None
     32 W. Anapamu Street #186
     Santa Barbara, CA  93101
     DAVID GARDNER                      Regional Vice President                None
     2504 Clublake Trail
     McKinney, TX  75070
     CARLA A. GOEHRING                  Regional Vice President                None
     11426 Long Pine
     Houston, TX  77077
     MARK LIEN                          Regional Vice President                None
     5904 Mimosa
     Sedalia, MO  65301
     JUDITH L. LYON                     Regional Vice President                None
     163 Haynes Bridge Road, Ste 205
     Alpharetta, CA  30201
     DAVID MEYNCKE                      Regional Vice President                None
     4718 Orange Grove Way
     Palm Harbor, FL  34684
     TIM O'CONNELL                      Regional Vice President                None
     14872 Summerbreeze Way
     San Diego, CA  92128
     JULIANA PERKINS                    Regional Vice President                None
     2348 Adrian Street
     Newbury Park, CA  91320
     DAVE PETZKE                        Regional Vice President                None
     1673 Montelena Court
     Carson City, NV  89703
     ROBERT H. RUHM                     Regional Vice President                None
     167 Derby Street
     Melrose, MA  02176
     DIANE H. SNOWDEN                   Regional Vice President                None
     11 Thackery Lane
     Cherry Hill, NJ  08003
     BRUCE TUCKEY                       Regional Vice President                None
     41644 Chathman Drive
     Novi, MI  48375
     ANDREW VEASEY                      Regional Vice President                None
     14 Woodside
     Rumson, NJ  07760
     KELLI A. WIRTH-DUMSER              Regional Vice President                None
     8618 Hornwood Court
     Charlotte, NC  28215
     FRANK J. NASTA*                    Secretary                              Secretary
     AURELIA LACSAMANA*                 Treasurer                              None
     JEFFREY S. DEAN*                   Assistant Vice President,              None
                                        Annuity Product Manager
     SANDRA FLORIS*                     Assistant Vice President, Order Desk   None
</TABLE>      
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234

PART C.  OTHER INFORMATION (continued)
- ------   -----------------            

                       Seligman Financial Services, Inc.
                       ---------------------------------
                              As of March 31, 1997        
                              --------------------
<TABLE>    
<CAPTION> 
            (1)                              (2)                                (3)
    Name and Principal              Positions and Offices              Positions and Offices
     Business Address                   with Underwriter                  with Registrant
- ------------------------------  ------------------------------------   ---------------------
<S>                             <C>                                    <C>
     KEITH LANDRY*              Assistant Vice President, Order Desk   None
     GAIL S. CUSHING*           Assistant Vice President,              None
                                National Accounts Manager
     FRANK P. MARINO*           Assistant Vice President, Mutual
                                Fund Product Manager                   None
     JOSEPH M. MCGILL*          Assistant Vice President and           None
                                Compliance Officer
     JACK TALVY*                Assistant Vice President, Internal     None
                                Marketing Service Manager
     JOYCE PERESS*              Assistant Secretary                    None
</TABLE>     
   * The principal business address of each of these directors and/or officers
     is 100 Park Avenue, New York NY 10017.
 
   (c) Not applicable.
 
Item 30.    Location of Accounts and Records
- ----------  --------------------------------
                (1) Investors Fiduciary Trust Company
                    127 West 10th Street
                    Kansas City, Missouri 64105 AND
                (2) Seligman Data Corp.
                    100 Park Avenue
                    New York, NY  10017
    
Item 31.  Management Services - Seligman Data Corp. ("SDC") the Registrant's
- --------  -------------------                                               
          shareholder service agent, has an agreement with First Data Investor
          Services Group ("FDISG") pursuant to which FDISG provides a data
          processing system for certain shareholder accounting and recordkeeping
          functions performed by SDC, which commenced in July 1990.  For the
          years ended December 31, 1996, 1995 and 1994, the approximate cost of
          these services were:        
<TABLE>    
<CAPTION>
                                  1996     1995      1994
                                --------  -------  --------
<S>                             <C>       <C>      <C>
              Class A Shares    $100,800  $90,100   $83,256
              Class B Shares         650       --        --
              Class D Shares      23,800    6,000     4,905
</TABLE>     

Item 32.  Undertakings - The Registrant undertakes, (1) to furnish a copy of the
- --------  ------------                                                          
          Registrant's latest annual report, upon request and without charge, to
          every person to whom a prospectus is delivered and (2) if requested to
          do so by the holders of at least ten percent of its outstanding
          shares, to call a meeting of shareholders for the purpose of voting
          upon the removal of a director or directors and to assist in
          communications with other shareholders as required by Section 16(c) of
          the Investment Company Act of 1940.
 
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234


                                   SIGNATURES
                                   ----------
    
   Pursuant to the requirements of the Securities Act of 1933, and the
Investment Company Act of 1940, the Registrant certifies that it meets all of
the requirements for effectiveness of this Post-Effective Amendment pursuant to
Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-
Effective Amendment No. 75 to its Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York,
State of New York, on the 28th day of April, 1997.     

                                      SELIGMAN COMMON STOCK FUND, INC.


                                      By: /s/ William C. Morris
                                          ---------------------
                                           William C. Morris, Chairman

    
   Pursuant to the requirements of the Securities Act of 1933 and the Investment
Company Act of 1940, this Post-Effective Amendment No. 75 has been signed below
by the following persons in the capacities indicated on April 28, 1997.     

        Signature                                  Title
        ---------                                  -----


/s/ William C. Morris                    Chairman of the Board (Principal 
- ------------------------------           executive officer) and Director
  William C. Morris*                     
                                   
                                                                      
/s/ Brian T. Zino                        Director and President
- ------------------------------                        
  Brian T. Zino                    
                                   
                                   
/s/  Thomas G. Rose                      Treasurer
- ------------------------------          
  Thomas G. Rose


John R. Galvin, Director       )
Alice S. Ilchman, Director     )
Frank A. McPherson, Director   )
John E. Merow, Director        )
Betsy S. Michel, Director      )    /s/ Brian T. Zino
James C. Pitney, Director      )    -----------------
James Q. Riordan, Director     )    * Brian T. Zino, Attorney-in-fact
Ronald T. Schroeder, Director  ) 
Robert L. Shafer, Director     ) 
James N. Whitson, Director     ) 
                                 
<PAGE>
 
                                                                File No. 2-10835
                                                                         811-234

                        SELIGMAN COMMON STOCK FUND, INC.
                     Post-Effective Amendment No. 75 to the
                      Registration Statement on Form N-1A


                                 EXHIBIT INDEX

Form N-1A Item No.          Description
- ------------------          -----------
 
24(b)(1)                    Amended and Restated Articles of Incorporation

24(b)(2)                    Amended and Restated By-laws

24(b)(6)                    Copy of Amended Distributing Agreement

24(b)(8)                    Copy of Custody Agreement

24(b)(10)                   Opinion and Consent of Counsel

24(b)(11)                   Consent of Independent Auditors

24(b)(13)                   Form of Purchase Agreement of Fund's Class B Shares

24(b)(13)(a)                Form of Purchase Agreement of Fund's Class D Shares

24(b)(16)                   Performance Data Schedules

24(b)(17)                   Financial Data Schedules

Other Exhibits              Power of Attorney

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
        <NUMBER>        001
        <NAME> SELIGMAN COMMON STOCK FUND, INC. CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>

<PERIOD-TYPE>                   12-MOS                                          
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                           555440
<INVESTMENTS-AT-VALUE>                          747978
<RECEIVABLES>                                     2380
<ASSETS-OTHER>                                    2512
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  752870
<PAYABLE-FOR-SECURITIES>                         24450
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1771
<TOTAL-LIABILITIES>                              26221
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        508597
<SHARES-COMMON-STOCK>                            44072<F1>
<SHARES-COMMON-PRIOR>                            43307<F1>
<ACCUMULATED-NII-CURRENT>                         1123
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          24387
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        192541 
<NET-ASSETS>                                    656260<F1>
<DIVIDEND-INCOME>                                17517<F1>
<INTEREST-INCOME>                                 4513<F1>
<OTHER-INCOME>                                     399<F1>
<EXPENSES-NET>                                  (7334)<F1>
<NET-INVESTMENT-INCOME>                          15095<F1>
<REALIZED-GAINS-CURRENT>                         62821
<APPREC-INCREASE-CURRENT>                        20811
<NET-CHANGE-FROM-OPS>                            99656
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (14590)<F1>
<DISTRIBUTIONS-OF-GAINS>                       (47224)<F1>
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           8173<F1>
<NUMBER-OF-SHARES-REDEEMED>                    (10137)<F1>
<SHARES-REINVESTED>                               2729<F1>
<NET-CHANGE-IN-ASSETS>                           65685
<ACCUMULATED-NII-PRIOR>                            538
<ACCUMULATED-GAINS-PRIOR>                        13474
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4142<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   7334<F1>
<AVERAGE-NET-ASSETS>                            637325<F1>
<PER-SHARE-NAV-BEGIN>                            14.19<F1>
<PER-SHARE-NII>                                   0.35<F1>
<PER-SHARE-GAIN-APPREC>                           1.81<F1>
<PER-SHARE-DIVIDEND>                            (0.34)<F1>
<PER-SHARE-DISTRIBUTIONS>                       (1.12)<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              14.89<F1>
<EXPENSE-RATIO>                                   1.15<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class A only.  All other data are fund level.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
        <NUMBER>        002
        <NAME> SELIGMAN COMMON STOCK FUND, INC. CLASS B
<MULTIPLIER> 1000
       
<S>                             <C>

<PERIOD-TYPE>                    8-MOS                                          
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             APR-22-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                           555440
<INVESTMENTS-AT-VALUE>                          747978
<RECEIVABLES>                                     2380
<ASSETS-OTHER>                                    2512
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  752870
<PAYABLE-FOR-SECURITIES>                         24450
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1771
<TOTAL-LIABILITIES>                              26221
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        508597
<SHARES-COMMON-STOCK>                              434<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                         1123
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          24387
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        192541 
<NET-ASSETS>                                      6451<F1>
<DIVIDEND-INCOME>                                   54<F1>
<INTEREST-INCOME>                                   13<F1>
<OTHER-INCOME>                                       3<F1>
<EXPENSES-NET>                                    (39)<F1>
<NET-INVESTMENT-INCOME>                             31<F1>
<REALIZED-GAINS-CURRENT>                         62821
<APPREC-INCREASE-CURRENT>                        20811
<NET-CHANGE-FROM-OPS>                            99656
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         (35)<F1>
<DISTRIBUTIONS-OF-GAINS>                         (298)<F1>
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                            441<F1>
<NUMBER-OF-SHARES-REDEEMED>                       (27)<F1>
<SHARES-REINVESTED>                                 20<F1>
<NET-CHANGE-IN-ASSETS>                           65685
<ACCUMULATED-NII-PRIOR>                            538
<ACCUMULATED-GAINS-PRIOR>                        13474
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               13<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                     39<F1>
<AVERAGE-NET-ASSETS>                              2933<F1>
<PER-SHARE-NAV-BEGIN>                            14.80<F1>
<PER-SHARE-NII>                                   0.15<F1>
<PER-SHARE-GAIN-APPREC>                           1.20<F1>
<PER-SHARE-DIVIDEND>                            (0.16)<F1>
<PER-SHARE-DISTRIBUTIONS>                       (1.12)<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              14.87<F1>
<EXPENSE-RATIO>                                   1.92<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class B only.  All other data are fund level.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
        <NUMBER>        004
        <NAME> SELIGMAN COMMON STOCK FUND, INC. CLASS D
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<INVESTMENTS-AT-COST>                           492240
<INVESTMENTS-AT-VALUE>                          684452
<RECEIVABLES>                                    12364
<ASSETS-OTHER>                                    1245
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  698061
<PAYABLE-FOR-SECURITIES>                          2028
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1705
<TOTAL-LIABILITIES>                               3733
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        472345
<SHARES-COMMON-STOCK>                             3784<F1>
<SHARES-COMMON-PRIOR>                             3289<F1>
<ACCUMULATED-NII-CURRENT>                          616
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          29146
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        192222 
<NET-ASSETS>                                     56498<F1>
<DIVIDEND-INCOME>                                  737<F1>
<INTEREST-INCOME>                                  161<F1>
<OTHER-INCOME>                                       3<F1>
<EXPENSES-NET>                                   (494)<F1>
<NET-INVESTMENT-INCOME>                            407<F1>
<REALIZED-GAINS-CURRENT>                         29185
<APPREC-INCREASE-CURRENT>                        20491
<NET-CHANGE-FROM-OPS>                            57462
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        (415)<F1>
<DISTRIBUTIONS-OF-GAINS>                        (1070)<F1>
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           1055<F1>
<NUMBER-OF-SHARES-REDEEMED>                      (653)<F1>
<SHARES-REINVESTED>                                 93<F1>
<NET-CHANGE-IN-ASSETS>                           33364
<ACCUMULATED-NII-PRIOR>                            538
<ACCUMULATED-GAINS-PRIOR>                        13474
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              168<F1>
<INTEREST-EXPENSE>                                   0  
<GROSS-EXPENSE>                                    494<F1>
<AVERAGE-NET-ASSETS>                             51790<F1>
<PER-SHARE-NAV-BEGIN>                            14.16<F1>
<PER-SHARE-NII>                                   0.12<F1>
<PER-SHARE-GAIN-APPREC>                           1.06<F1>
<PER-SHARE-DIVIDEND>                            (0.12)<F1>
<PER-SHARE-DISTRIBUTIONS>                       (0.29)<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              14.93<F1>
<EXPENSE-RATIO>                                   1.92<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class D only.  All other data are fund level.
</FN>
        

</TABLE>

<PAGE>
 
                                                                       EXHIBIT 1

                              AMENDED AND RESTATED
                           ARTICLES OF INCORPORATION
                                       of
                       BROAD STREET INVESTING CORPORATION

     THIS IS TO CERTIFY that BROAD STREET INVESTING CORPORATION, a corporation
organized and existing under and by virtue of the laws of the State of Maryland,
hereby amends and restates its charter to read in is entirety as follows:

     FIRST:  I, the subscriber, Allen W. Dulles, Franklin S. Pollak and Charles
H. Sarolea, the post office address of all of whom is 48 Wall Street, New York,
N. Y., all being of full legal age, do, under and by virtue of the General Laws
of the State of Maryland authorizing the formation of corporations, form a
corporation.

     SECOND:  NAME.   The name of the corporation (which is hereinafter called
              ----                                                            
the "Corporation") is

                        SELIGMAN COMMON STOCK FUND, INC.

     THIRD:  PURPOSES AND POWERS.  The purpose for which the Corporation is
             -------------------                                           
formed and the business or objects to be carried on or promoted by it are to
engage in the business of holding, investing and reinvesting its funds in
securities, and in connection therewith, to hold part or all of its funds in
cash, to acquire by purchase, subscription, contract, exchange or otherwise, and
to own, hold for investment, resale or otherwise, sell, assign, negotiate,
exchange, transfer or otherwise dispose of, or turn to account or realize upon,
and generally to deal in and with, all forms of stocks, bonds, debentures,
notes, evidences of interest, evidences of indebtedness, warrants, and other
securities, irrespective of their form, the name by which they may be described,
or the character or form of the entities by which they are issued or created
(hereinafter sometimes called "Securities"); and, subject to the provisions of
these Articles of Incorporation, to make payment thereof by any lawful means; to
exercise any and all rights, powers and privileges of individual ownership or
interest in respect of any and all such Securities, including the right to vote
thereon and to consent and otherwise act with respect thereto; to do any and all
acts and things for the preservation, protection, improvement and enhancement in
value of any and all such Securities; to acquire or become interested in any
such Securities as aforesaid, irrespective of whether or not such Securities be
fully paid or subject to further payments, and to make payments thereon as
called for or in advance of calls or otherwise;

     And, in general, to do any or all such other things in connection with the
objects and purposes of the Corporation hereinbefore set forth, as are, in the
opinion of the Board of Directors of the Corporation, necessary, incidental,
relative or conducive to the attainment of such objects and purposes; and to do
such acts and things, and to exercise any and all such
<PAGE>
 
powers to the same extent as a natural person might or could lawfully do to the
full extent authorized or permitted to a corporation under any laws that may be
now or hereafter applicable or available to the Corporation.

     In addition, the Corporation may issue, sell, acquire through purchase,
exchange, or otherwise hold, dispose of, resell, transfer, reissue or cancel
shares of its capital stock in any manner and to the extent now or hereafter
permitted by the laws of Maryland and by these Articles of Incorporation.

     The foregoing matters shall each be construed as purposes, objects and
powers, and none of such matters shall be in any way limited by reference to, or
inference from, any other of such matters or any other Article of these Articles
of Incorporation, but shall be regarded as independent purposes, objects and
powers and the enumeration of specific purposes, objects and powers shall not be
construed to limit or restrict in any manner the meaning of general terms or the
general powers of the Corporation now or hereafter conferred by the laws of the
State of Maryland, nor shall the expression of one thing be deemed to exclude
another, although it be of like nature, not expressed.

     Nothing herein contained shall be construed as giving the Corporation any
rights, powers or privileges not permitted to it by law.

     FOURTH:  PRINCIPAL OFFICE.  The post office address of the principal office
              ----------------                                                  
of the Corporation in this State is c/o The Corporation Trust Incorporated,
First Maryland Building, 25 South Charles Street, Baltimore, Maryland.  The
resident agent of the Corporation is The Corporation Trust Incorporated, the
post office address of which is First Maryland Building, 25 South Charles
Street, Baltimore, Maryland.  Said resident agent is a Corporation of the State
of Maryland.

     FIFTH:  CAPITAL STOCK.  A.  The total number of shares of capital stock
             -------------                                                  
which the Corporation has authority to issue is 500,000,000 shares (par value of
$.50 per share), amounting to an aggregate par value of $250,000,000. All such
shares are intitially classified as "Common Stock."  The Board of Directors of
the Corporation may classify or reclassify any unissued shares of capital stock
(which classes shall share ownership of specifically allocated assets but may
have differing dividend, distribution, anf other rights, as hereinafter
contemplated) whether or not such shares have been previously classifed or
reclassified from time to time by setting or changing in any one or more
respects the preferences, conversion or other rights, voting powers,
restrictions, limitations as to dividends, qualifications, or terms or
conditions of redemption of such shares of stock.

     B.  No holder of shares of the capital stock of the Corporation shall be
entitled as such, as a matter or right, to purchase or subscribe for any part of
any new or additional issue of stock or securities of the Corporation..

     C.  All shares of the capital stock of the Corporation now or hereafter
authorized shall be "subject to redemption" and "redeemable," in the sense used
in the General Laws of the State 

                                      -2-
<PAGE>
 
of Maryland authorizing the formation of corporations. In the absence of any
contrary specification as to the purpose for which shares of the capital stock
of the Corporation are redeemed or repurchased by it, all shares of any class so
redeemed or repurchased shall thereafter have the status of authorized but
unissued capital stock of the Corporation.

     D.  All classes of the Common Stock of the Corporation shall represent the
same interest in the Corporation and have identical voting, dividend,
liquidation, and other rights with any other shares of capital stock; provided,
however, that not withstanding anything in the charter of the Corporation to the
contrary:

       1. Each class of shares may be subject to such front-end sales charges as
       may be established by the Board of Directors from time to time in
       accordance with the Investment Company Act of 1940, as amended, and
       applicable rules and regulations of the National Association of
       Securities Dealers, Inc.

       2. Each class of shares may be subject to such contingent deferred sales
       charges as may be established from time to time by the Board of Directors
       in accordance with the Investment Company Act of 1940, as amended, and
       applicable rules and regulations of the National Association of
       Securities Dealers, Inc.

       3. Expenses related solely to a particular class (including, without
       limitation, distribution expenses under a Rule 12b-1 plan and
       administrative expenses under an administration or service agreement,
       plan or other arrangement, however designated, which may differ amoung
       the various classes) shall be borne by that class and shall be
       appropriately reflected (in the manner determined by the Board of
       Directors) in the net asset value, dividend, distributions and
       liquidation rights of the shares of that class.

       4. At such time as may be determined by the Board of Directors and
       reflected in Articles Supplementary establishing a class, shares of a
       particular class shall be automatically converted to shares of another
       class; provided, however that such conversion shall be subject to the
       continuing availability of an opinion of counsel to the effect that such
       conversion of the shares does not constitute a taxable event under
       federal income tax law.  The Board of Directors, in its sole discretion,
       may suspend any conversion provision if such opinion is no longer
       available.

       5. As to any matter with respect to which a separate vote of any class is
       required by the Investment Company Act of 1940, as amended, or by the
       Maryland General Corporation Law (including, without limitation, approval
       of any plan, agreement or other arrangement referred to in subsection (3)
       above), such requirement as to a separate vote by that class 

                                      -3-
<PAGE>
 
       shall apply in lieu of single class voting. As to any matter that does
       not affect the interest of a particular class, only the holders of shares
       of the affected classes hall be entitled to vote.

       E.  The terms of the common stock as further set by the Board of
Directors are as follows:

       (a)  The Common Stock of the Corporation shall have three classes of
shares, which shall be designated Class A Common Stock, Class B Common Stock and
Class D Common Stock.  The number of authorized shares of Class A Common Stock,
of Class B Common Stock and of Class D Common Stock shall each consist of the
sum of x and y, where x equals the issued and outstanding shares of such class
and y equals one-third of the authorized but unissued shares of Common Stock of
all classes; provided that at all times the aggregate authorized number of
shares of Common Stock (i.e., 500,000,000 shares of Common Stock until changed
by further action of the Board of Directors in accordance with Section 2-208.1
of the Maryland General Corporation Law, or any successor provision); and, in
the event application of the formula above would result, at any time, in
fractional shares, the applicable number of authorized shares of each class
shall be rounded down to the nearest whole number of shares of such class.  Any
class of Common Stock shall be referred to herein individually as a "Class" and
collectively, together with any further class or classes from time to time
established, as the "Classes."

       (b)  All classes shall represent the same interest in the Corporation and
have identical voting, dividend, liquidation, and other rights; provided
however, that notwithstanding anything in the charter of the Corporation to the
contrary:

          (1)  Class A shares may be subject to such front-end sales loads as
       may be established by the Board of Directors from time to time in
       accordance with the Investment Company Act and applicable rules and
       regulations of the National Association of Securities Dealers, Inc. (the
       "NASD").

          (2)  Class B shares may be subject to such contingent deferred sales
       charges as may be established from time to time by the Board of Directors
       in accordance with the Investment Company Act and applicable rules and
       regulations of the NASD.  Subject to subsection (e) below, each Class B
       share shall convert automatically into Class A shares on the last
       business day of the month that precedes the eighth anniversary of the
       date of issuance of such Class B share; such conversion shall be effected
       on the basis of the relative net asset values of Class B and Class A
       shares as determined by the Corporation on the date of conversion.

          (3)  Class D shares may be subject to such contingent deferred sales
       charges as may be established from time to time by the Board of Directors
       in accordance with the Investment Company Act and applicable rules and
       regulations of the NASD.

                                      -4-
<PAGE>
 
          (4)  Expenses related solely to a particular Class (including, without
       limitation, distribution expenses under a Rule 12b-1 plan and
       administrative expenses under an administration or service agreement,
       plan or other arrangement, however designated, which may differ between
       the Classes) shall be borne by that Class and shall be appropriately
       reflected (in the manner determined by the Board of Directors) in the net
       asset value, dividends, distribution and liquidation rights of the shares
       of that Class.

          (5)  At such time as shall be permitted under the Investment Company
       Act, any applicable rules and regulations thereunder and the provision of
       any exemptive order applicable to the Corporation, and as may be
       determined by the Board of Directors and disclosed in the then current
       prospectus of the Corporation, shares of a particular Class may be
       automatically converted into shares of another Class; provided, however,
       that such conversion shall be subject to the continuing availability of
       an opinion of counsel to the effect that such conversion does not
       constitute a taxable event under Federal income tax law.  The Board of
       Directors, in its sole discretion, may suspend any conversion rights if
       such opinion is no longer available.

          (6)  As to any matter with respect to which a separate vote of any
       Class is required by the Investment Company Act or by the Maryland
       General Corporation Law (including, without limitation, approval of any
       plan, agreement or other arrangement referred to in subsection (4)
       above), such requirement as to a separate vote by the Class shall apply
       in lieu of single Class voting, and, if permitted by the Investment
       Company Act or any rules, regulations or orders thereunder and the
       Maryland General Corporation Law, the Classes shall vote together as a
       single Class on any such manner that shall have the same effect on each
       such Class.  As to any matter that does not affect the interest of a
       particular Class, only the holders of shares of the affected Class shall
       be entitled to vote.

          SIXTH:  DIRECTORS.  The Corporation has eleven directors in office,
                  ---------                                                  
and the names of the directors in office are as follows:

               Lane W. Adams             Douglas R. Nichols, Jr.
               Fred E. Brown                  Robert G. Olmsted
               Stanley R. Currie         James C. Pitney
               William McBride Love      B. W. Robertson
               David Hunter McAlpin      Robert L. Shafer
               John E. Merow
 
The number of directors in office may be changed from time to time in such
lawful manner as the By-Laws of the Corporation shall provide.

                                      -5-
<PAGE>
 
     SEVENTH:  PROVISIONS FOR DEFINING, LIMITING AND REGULATING THE POWERS OF
               --------------------------------------------------------------
               THE CORPORATION, DIRECTORS AND SHAREHOLDERS.
               ------------------------------------------- 

          A.  BOARD OF DIRECTORS.  The Board of Directors shall have the general
              ------------------                                                
management and control of the business and property of the Corporation, and may
exercise all the powers of the Corporation, except such as are by statute or by
these Articles of Incorporation or by the By-Laws conferred upon or reserved to
the shareholders.  In furtherance and not in limitation of the powers conferred
by statute the Board of Directors is hereby empowered:

          1. To authorize the issuance and sale, from time to time, of shares of
       the capital stock of the Corporation, whether for cash at not less than
       the par value thereof or for such other consideration as the Board of
       Directors may deem advisable, in the manner and to the extent now or
       hereafter permitted by the laws of Maryland; provided, however, that the
       consideration (or the value thereof as determined by the Board of
       Directors) per share to be received by the Corporation upon the sale of
       any shares of its capital stock (including treasury shares) shall not be
       less than the net asset value (determined as provided in Article NINTH
       hereof) per share of such capital stock outstanding at the time
       (determined by the Board of Directors) as of which the computation of
       such net asset value shall be made.

          2. To authorize the execution and performance by the Corporation of an
       agreement or agreements, which may be exclusive contracts, with Seligman
       Distributor, Inc., a Delaware corporation, or any other person, as
       distributor, providing for the distribution of shares of the capital
       stock of the Corporation.  Such agreement or agreements may provide for
       the charge by the Corporation of a premium over the net asset value
       (determined as provided in Article NINTH hereof) of such shares, which
       premium shall not exceed an amount equal to 9% of the sum of such net
       asset value plus such premium, and the payment or allowance of a
       commission or discount by the Corporation to such distributor, and may
       further provide for the reallowance by such distributor of commissions or
       concessions from such commission or discount; provided, however, that
       such commission or discount shall not exceed the amount of the
       aforementioned premium.  Any such agreement or agreements shall provide
       that any such distributor may purchase shares of the capital stock of the
       Corporation from the Corporation only to the extent that it shall have
       received purchase orders therefor, that the distributor shall not make
       any short sales of the shares of the capital stock of the Corporation,
       and that the distributor shall not sell any shares of the capital stock
       of the Corporation to officers or directors of the Corporation, of the
       distributor or of any corporation or association furnishing managerial or
       supervisory services to the Corporation, or to any such corporation or
       association, 

                                      -6-
<PAGE>
 
       unless the distributor is advised that the purchases are for investment,
       that the shares purchased will not be resold except through redemption or
       repurchase by or on behalf of the Corporation and that the purchasers
       will advise the distributor of any sales of shares so purchased made less
       than two months after the date or purchase.

          3. To specify, in instances in which it may be desirable, that shares
       of the capital stock of the Corporation repurchased by it are not
       acquired for retirement and to specify the purposes for which such shares
       are repurchased.

          4. To authorize the execution and performance by the Corporation of an
       agreement or agreements with Seligman or any other person whereby,
       subject to the control of the Board of Directors, the investment and
       other operations of the Corporation shall be managed by Seligman or such
       other person.

 
          The Corporation may in its By-Laws confer powers on the Board of
Directors in addition to the foregoing and in addition to the powers expressly
conferred by statute.

     B. VOTING POWERS:  The presence in person or by proxy of the holders of
        -------------                                                       
one-third of the shares of the capital stock of the Corporation outstanding and
entitled to vote thereat shall constitute a quorum at any meetings of the
shareholders.  If at any meeting of the shareholders there be less than a quorum
present, the shareholders present at such meeting may, without further notice,
adjourn the same from time to time until a quorum shall attend, but no business
shall be transacted at any such adjourned meeting, except such as might have
been lawfully transacted had the meeting not been adjourned.  Notwithstanding
any provision of law requiring any action to be taken or authorized by the
holders of a greater proportion than a majority of the shares of capital stock
of the Corporation entitled to vote thereon, such action shall be valid and
effective if taken or authorized by the affirmative vote of the holders of a
majority of the shares of the capital stock of the Corporation outstanding and
entitled to vote thereon.
 
     C.  DIVIDENDS.  The Corporation shall distribute to its shareholders in the
         ---------                                                              
form of dividends, at such times and in such manner as the Board of Directors
shall determine, in cash or in shares of capital stock or rights to subscribe to
shares of capital stock of the Corporation, or in property or otherwise, amounts
substantially equal to the net income of the Corporation from dividends and
interest after deduction of operating expenses, taxes applicable to such income,
and reserves set aside out of such income.

     In addition, the Board of Directors is empowered to distribute, from time
to time, in such form as the Board of Directors may determine, additional
dividends from any assets of the Corporation legally available for the payment
thereof (excluding unrealized appreciation of the Corporation's assets),
provided that each shareholder be notified at the time of payment of each such
dividend of the account or accounts from which it was paid.

                                      -7-
<PAGE>
 
     D.  INSPECTION OF BOOKS AND RECORDS.  The holders of shares of the capital
         -------------------------------                                       
stock of the Corporation shall have the right to inspect the records, documents,
accounts and books of the Corporation, subject to reasonable regulations of the
Board of Directors, not contrary to Maryland law, as to whether and to what
extent, and at what times and places, and under what conditions and regulation,
such right shall be exercised.

     EIGHTH:  REDEMPTIONS AND REPURCHASES.
              --------------------------- 
 
     A.   The Corporation shall under some circumstances redeem, and may under
other circumstances repurchase, shares of its capital stock as follows:

       1. OBLIGATION OF THE CORPORATION TO REDEEM SHARES.  Each holder of shares
          ----------------------------------------------                        
       of any class shall be entitled at his option to require the Corporation
       to redeem all or any part of the shares of capital stock of that class
       owned by such holder, upon written or telegraphic request to the
       Corporation or its designated agent, accompanied by surrender of the
       certificate or certificates for such shares, or such other evidence of
       ownership as shall be specified by the Board of Directors, for the
       proportionate interest per share in the assets of the Corporation
       belonging to that class, or the cash equivalent thereof (being the net
       asset value of such shares determined as provided in Article NINTH
       hereof, less the amount of any applicable contingent deferred sales
       charge payable on such redemption), subject to and in accordance with the
       provisions of paragraph B of this Article.

          2.  RIGHT OF THE CORPORATION TO REPURCHASE SHARES.  In addition the
              ---------------------------------------------                  
       Board of Directors may, from time to time in its discretion, authorize
       the officers of the Corporation to repurchase shares of its capital
       stock, either directly or through an agent, subject to and in accordance
       with the provisions of paragraph B of this Article.  The price to be paid
       by the Corporation upon any such repurchase shall be determined, in the
       discretion of the Board of Directors, in accordance with any provision of
       the Investment Company Act of 1940 or any rule or regulation thereunder,
       including any rule or regulation made or adopted pursuant to Section 22
       of the Investment Company act of 1940 by the Securities and Exchange
       Commission or any securities association registered under the Securities
       Exchange Act of 1934.

          3. REDEMPTION OF ACCOUNTS.  In addition the Board of Directors may,
             ----------------------                                          
       from time to time in its discretion, authorize the Corporation to require
       the redemption of all or any part of the outstanding Shares of any Class
       or all or any part of the outstanding Shares of any shareholder, for the
       proportionate interest per Share in the assets of the Corporation
       belonging 

                                      -8-
<PAGE>
 
       to that Class or shareholder, or the cash equivalent thereof (being the
       net asset value per Share of that Class determined as provided in Article
       NINTH hereof), subject to and in accordance with the provisions of
       paragraph B of this Article, upon the sending of written notice thereof
       to each shareholder any of whose Shares are so redeemed and on such terms
       and conditions as the Board of Directors shall deem advisable.

     B.  The following provisions shall be applicable with respect to
redemptions and repurchases of shares of the capital stock of the Corporation
pursuant to paragraph A hereof:


          1. Certificates for shares of capital stock to be redeemed or
       repurchased shall be surrendered in proper form for transfer, together
       with such proof of the authenticity of signatures as may be required by
       resolution of the Board of Directors.

          2. Payment of the redemption or repurchase price by the Corporation or
       its designated agent shall be made in cash within seven days after the
       time used for determination of the redemption or repurchase price, but in
       no event prior to delivery to the Corporation or its designated agent of
       the certificate or certificates for the shares of capital stock so
       redeemed or repurchased, or of such other evidence of ownership as shall
       be specified by the Board of Directors; except that any payment may be
       made in whole or in part in securities or other assets of the
       Corporation, if, in the event of the closing of the New York Stock
       Exchange or the happening of any event at any time prior to actual
       payment which makes the liquidation of Securities in orderly fashion
       impractical or impossible, the Board of Directors shall determine that
       payment in cash would be prejudicial to the best interests of the
       remaining shareholders of the Corporation.  In making any such payment in
       whole or in part in Securities or other assets of the Corporation, the
       Corporation shall, as nearly as may be practicable, deliver Securities or
       other assets of a gross value (determined in the manner provided in
       Article NINTH hereof) representing the same proportionate interest in the
       Securities and other assets of the as is represented by the shares so to
       be paid for.  Delivery of the Securities included in any such payment
       shall be made as promptly as any necessary transfers on the books of the
       several corporations whose Securities are to be delivered may be made.

          3. The right of the holder of shares of  capital stock redeemed or
       repurchased by the Corporation as provided in this Article to receive
       dividends thereon and all other rights of such holder with respect to
       such shares shall forthwith cease and terminate from and after the time
       as of which the redemption or repurchase price of such shares has been
       determined (except the right of such holder to receive (a) the redemption

                                      -9-
<PAGE>
 
       or repurchase price of such shares from the Corporation or its designated
       agent, in cash and/or in Securities or other assets of the Corporation,
       and (b) any dividend to which such holder had previously become entitled
       as the record holder of such shares on the record date for such
       dividend).

     NINTH:  DETERMINATION OF NET ASSET VALUE.  For the purposes referred to in
             --------------------------------                                  
Articles SEVENTH and EIGHTH hereof, the net asset value of shares of the capital
stock of the Corporation shall be determined by or pursuant to the direction of
the Board of Directors in accordance with the following provisions:

     A.  Such net asset value on any day shall be computed as follows:

     The net asset value of each share of such stock shall be the quotient
obtained by dividing the "net value of the assets" of the Corporation by the
total number of shares at the time deemed to be outstanding (including shares
sold whether paid for and issued or not, and excluding shares redeemed or
repurchased on the basis of previously determined values, whether paid for,
received and held in treasury, or not).

     The "net value of the assets" shall be the "gross value" after deducting
the amount of all expenses incurred and accrued and unpaid. such reserves as may
be set up to cover taxes and any other liabilities, and such other deductions as
in the opinion of the officers of the Corporation are in accordance with
accepted accounting practice.

     The "gross value" of the assets shall be the amount of all cash and
receivables and the market value of all Securities and other assets held by the
Corporation at the time as of which the determination is made.  Securities held
shall be valued at market value or, in the absence of readily available market
quotations, at fair value, both as determined pursuant to methods approved by
the Board of Directors and in accordance with applicable statutes and
regulations.

     B.  The Board of Directors is empowered, in its absolute discretion, to
establish other methods for determining such net asset value whenever such other
methods are deemed by it to be necessary or desirable in order to enable the
Corporation to comply with any provision of the Investment Company Act of 1940
or any rule or regulation thereunder, including any rule or regulation made or
adopted pursuant to Section 22 of the Investment Company Act of 1940 by the
Securities and Exchange Commission or any securities association registered
under the Securities Exchange Act of 1934.

     TENTH:  DETERMINATION BINDING.  Any determination made by or pursuant to
             ---------------------                                           
the direction of the Board of Directors in good faith, and so far as accounting
matters are involved in accordance with accepted accounting practice, as to the
amount of the assets, obligations or liabilities of the Corporation, as to the
amount of the net income of the Corporation from dividends and interest for any
period or amounts at any time legally available for the payment of dividends, as
to the amount of any reserves or charges set up and the propriety thereof, as to
the time of or purpose for creating any reserves or charges, as to the use,
alteration or cancellation of any reserves or charges (whether or not any
obligation or liability for which such reserves or 

                                      -10-
<PAGE>
 
charges shall have been created shall have been paid or discharged or shall be
then or thereafter required to be paid or discharged), as to the price or
closing bid or asked price of any Security owned or held by the Corporation, as
to the market value of any Security or fair value of any other asset owned by
the Corporation, as to the number of shares of the Corporation outstanding or
deemed to be outstanding, as to the impracticability or impossibility of
liquidating Securities in orderly fashion, as to the extent to which it is
practicable to deliver the proportionate interest in the Securities and other
assets of the Corporation represented by any shares redeemed or repurchased in
payment for any such shares, as to the method of payment for any such shares,
redeemed or repurchased, or as to any other matters relating to the issue, sale,
redemption, repurchase, and/or other acquisition or disposition of Securities or
shares of capital stock of the Corporation shall be final and conclusive and
shall be binding upon the Corporation and all holders of shares of its capital
stock, past, present and future, and shares of the capital stock of the
Corporation are issued and sold on the condition and understanding that any and
all such determinations shall be binding as aforesaid. No provision of these
Articles of Incorporation shall be effective to (a) bind any person to waive
compliance with any provision of the Securities Act of 1933 or the Investment
Company Act of 1940 or of any valid rule, regulation or order of the Securities
and Exchange Commission thereunder, or (b) protect or purport to protect any
director or officer of the Corporation against any liability to the Corporation
or its security holders to which he would otherwise be subject by reason of
willful misfeasance, bad faith, gross negligence or reckless disregard of the
duties involved in the conduct of his office.

     ELEVENTH:  AMENDMENTS.  The Corporation reserves the right from time to
                ----------                                                  
time to make any amendment of its Articles of Incorporation, including, but
without limitation, any amendment changing the terms of any of its outstanding
capital stock by classification, re-classification or otherwise, upon the vote
of the holders of a majority of the shares of the capital stock of the
Corporation at the time outstanding and entitled to vote thereon; and the term
"Articles of Incorporation" as used herein shall be deemed to include any valid
amendment hereto, unless the context otherwise requires.  Shareholdersd shall be
advised of the adoption of any and all amendments to the Articles fo
Incorporation in the quarterly report issued next after their adoption.

     TWELFTH:  LIABILITY.  A director or officer of the Corporation shall not be
               ---------                                                        
liable to the Corporation or its shareholders for monetary damages for breach of
fiduciary duty as a Director or Officer, except to the extent such exemption
from liability or limitation thereof is not permitted by law (including the
Investment Company Act of 1940 as currently in effect or as the same may
hereafter be amended).

     No amendment, modification or repeal of this Article Twelfth shall
adversely affect any right or protection of a Director or Officer that exists at
the time of such amendment, modification or repeal.

     THIRTEENTH:  INDEMNIFICATION OF DIRECTORS, OFFICERS AND EMPLOYEES.  The
                  ----------------------------------------------------      
Corporation shall indemnify to the fullest extent permitted by law (including
the Investment Company Act of 1940 as currently in effect or as the same may
hereafter be amended) any person made or threatened to be made a party to any
action, suit or proceeding, whether criminal, 

                                      -11-
<PAGE>
 
civil, administrative or investigative, by reason of the fact that such person
or such person's testator or intestate is or was a Director, Officer or employee
of the Corporation or serves or served at the request of the Corporation any
other enterprise as a Director, Officer or employee. To the fullest extent
permitted by law (including the Investment Company Act of 1940 as currently in
effect or as the same may hereafter be amended), expenses incurred by any such
person in defending any such action, suit or proceeding shall be paid or
reimbursed by the Corporation promptly upon receipt by it of an undertaking of
such person to repay such expenses if it shall ultimately be determined that
such person is not entitled to be indemnified by the Corporation. The rights
provided to any person by this Article shall be enforceable against the
Corporation by such person who shall be presumed to have relied upon it in
serving or continuing to serve as a Director, Officer or employee as provided
above. No amendment of this Article Thirteenth shall impair the rights of any
person arising at any time with respect to events occurring prior to such
amendment. For purposes of this Article Thirteenth, the term "Corporation" shall
include any predecessor of the Corporation and any constituent corporation
(including any constituent of a constituent) absorbed by the Corporation in a
consolidation or merger; the term "other enterprise" shall include any
corporation, partnership, joint venture, trust or employee benefit plan; service
"at the request of the Corporation" shall include service as a Director, Officer
or employee of the Corporation which imposes duties on, or involves services by,
such Director, Officer or employee with respect to an employee benefit plan, its
participants or beneficiaries; any excise taxes assessed on a person with
respect to an employee benefit plan shall be deemed to be indemnifiable
expenses; and action by a person with respect to any employee benefit plan which
such person reasonably believes to be in the interest of the participants and
beneficiaries of such plan shall be deemed to be action not opposed to the best
interests of the Corporation.


                                *    *    *    *

     The foregoing amendment and restatement of the charter of the Corporation
has been duly advised by the Board of Directors and approved by the stockholders
of the Corporation.

     IN WITNESS WHEREOF, BROAD STREET INVESTING CORPORATION has caused these
Articles of Amendment and Restatement to be signed in its name and on its behalf
by its President, witnessed by its Secretary, and the said officers of the
Corporation further also acknowledged said instrument to be the corporate act of
the Corporation and stated under the penalties of perjury that to the best of
their knowledge, information and belief the matters and facts therein set forth
with respect to approval are true in all material respects, all on April 23,
1982.

                              BROAD STREET INVESTING CORPORATION
 
 
 
                              By    /s/  Ronald T. Schroeder
                                    ------------------------
                                         Ronald T. Schroeder

                                      -12-
<PAGE>
 
                                             President


Witness:

       /s/  Carl J. White
    ------------------------
    Carl J. White, Secretary

                                      -13-

<PAGE>
 
                                                                       EXHIBIT 2
                                  RESTATEMENT

                                    OF THE

                                    BY-LAWS

                                      OF

                       SELIGMAN COMMON STOCK FUND, INC.

 
<PAGE>
 
                        SELIGMAN COMMON STOCK FUND, INC.

                                    BY-LAWS


                                   ARTICLE I.

                             SHAREHOLDERS' MEETINGS


     SECTION 1.  PLACE OF HOLDING MEETINGS.  Each meeting of shareholders shall
                 -------------------------                                     
be held at the office of the Corporation in the City of Baltimore, Maryland, or
at such other place within the United States as may be fixed by the Board of
Directors.

     SECTION 2.  ANNUAL MEETINGS.  The annual meeting of the shareholders of the
                 ---------------                                                
Corporation shall be held during the 31-day period commencing April 15 of each
year on such day and at such hour as may from time to time be designated by the
Board of Directors and stated in the notice of such meeting, for the transaction
of such business as may properly be brought before the meeting; provided,
                                                                -------- 
however, that an annual meeting of shareholders shall not be required to be held
- -------                                                                         
in any year in which none of the following is required to be acted on by
shareholders pursuant to the Investment Company Act of 1940:  election of
directors; approval of the investment advisory agreement; ratification of the
selection of independent public accountants and approval of a distribution
agreement.

     SECTION 3.  SPECIAL MEETINGS.  Special meetings of the shareholders for any
                 ----------------                                               
purpose or purposes may be called by the Chairman of the Board, the President, a
majority of the Board of Directors or a majority of the Executive Committee and
shall be called by the Secretary upon the written request of the holders of
shares entitled to not less than twenty-five percent of all the votes entitled
to be cast at such meeting.  Such request shall state the purpose or purposes of
such meeting and the matters proposed to be acted on thereat.  The Secretary
shall inform such shareholders of the reasonably estimated cost of preparing and
mailing such notice of meeting, and upon payment to the Corporation of such
costs the Secretary shall give notice stating the purpose or purposes of the
meeting, as required in this Article and by law, to all shareholders entitled to
notice of such meeting.  No special meeting need be called upon the request of
the holders of shares entitled to cast less than a majority of all votes
entitled to be cast at such meeting, to consider any matter which is
substantially the same as a matter voted upon at any special meeting of
shareholders held during the preceding twelve months.

     SECTION 4.  NOTICE OF SHAREHOLDERS' MEETINGS.  Not less than ten days nor
                 --------------------------------                             
more than ninety days before the date of every shareholders' meeting, the
Secretary shall give to each shareholder entitled to vote at or to notice of
such meeting, written or printed notice stating the time and place of the
meeting and, in the case of a special meeting, the purpose or purposes for which
the meeting is called, either by mail or presenting it to him personally or by
leaving it at his residence or usual place of business.  If mailed, such notice
shall be deemed to be given when deposited in the United States mail addressed
to the shareholder at his post office address as it appears on the records of
the Corporation, with postage thereon prepaid.
<PAGE>
 
     SECTION 5.  QUORUM.  At any meeting of shareholders, the presence in person
                 ------                                                         
or by proxy of shareholders entitled to cast one-third of the votes thereat
shall constitute a quorum.  If at any meeting of the shareholders there shall be
less than a quorum present, the holders of a majority of the shares present at
such meeting may, without further notice, adjourn the same from time to time
until a quorum shall attend, but no business shall be transacted at any such
adjourned meeting, except such as might have been lawfully transacted had the
meeting not been adjourned.

     SECTION 6.  VOTING.  A majority of the votes cast at a meeting of
                 ------                                               
shareholders, at which a quorum is present, shall be sufficient to take or
authorize action upon any matter which may properly come before the meeting,
unless more than a majority of votes cast is required by law or by the Articles
of Incorporation.

     With respect to all shares having voting rights (a) a shareholder may vote
the shares owned of record by him either in person or by proxy executed in
writing by the shareholder or by his duly authorized attorney-in-fact, provided
that no proxy shall be valid after eleven months from its date unless otherwise
provided in the proxy and (b) in all elections for directors every shareholder
shall have the right to vote, in person or by proxy, the shares owned of record
by him, for as many persons as there are directors to be elected and for whose
election he has a right to vote.

     SECTION 7.  CONDUCT OF SHAREHOLDERS' MEETINGS.  Each meeting of
                 ---------------------------------                  
shareholders shall be presided over by the Chairman of the Board, or if he is
not present, by the President or a Vice-President of the Corporation designated
by the Chairman of the Board to act as Chairman of the meeting, or if none of
the foregoing is present, by a Chairman to be elected at the meeting.  The
Secretary of the Corporation, or if he is not present, an Assistant Secretary,
or if neither is present, a secretary to be named at the meeting, shall act as
secretary of the meeting.

                                  ARTICLE II.

                              BOARD OF DIRECTORS.

     SECTION 1.  NUMBER; TERM.  The business and affairs of the Corporation
                 ------------                                              
shall be managed under the direction of a Board of eleven members, but from time
to time such number may be increased to not more than twenty or decreased to not
less than three, by vote of a majority of the entire Board of Directors,
provided that the tenure of office of a director shall not be affected by any
decrease in the number of directors so made by the Board.

     At each annual meeting of shareholders the shareholders shall elect
directors to hold office until the next annual meeting or until their successors
are elected and qualify, subject to the right of removal granted by law.
Directors need not be shareholders.

     SECTION 2.  VACANCIES.  Any vacancy occurring in the Board of Directors for
                 ---------                                                      
any cause other than by reason of an increase in the number of directors may be
filled by the vote of a majority of the remaining directors, although such
majority is less than a quorum.  Any vacancy occurring by reason 

                                       2
<PAGE>
 
of an increase in the number of directors may be filled by action of a majority
of the entire Board of Directors. A director elected by the Board of Directors
to fill a vacancy shall be elected to hold office until the next annual meeting
of shareholders or until his successor is elected and qualifies.

     SECTION 3.  MEETINGS.  Meetings of the Board of Directors, regular or
                 --------                                                 
special, may be held at any place in or out of the State of Maryland as the
Board may from time to time determine or as shall be specified or filed in the
respective notices or waivers of notice thereof.

     Regular meetings of the Board shall be held at such time as the Board may
from time to time determine.  No notice need be given of regular meetings of the
Board.

     Special meetings of the Board may be held at any time upon call of the
Chairman of the Board, at the request of the Executive Committee or of a
majority of the directors, by the Secretary, by oral, telegraphic or written
notice duly served on or sent or mailed to each director not less than two days
before such meeting.  Such notice need not include a statement of the business
to be transacted at, or the purpose of, such special meeting.  A written waiver
of notice, signed by the director entitled to such notice and filed with the
records of the meeting, whether before or after the holding thereof, or actual
attendance at the meeting, shall be deemed equivalent to the giving of notice to
such director.

     At all meetings of the Board, a majority of the entire Board, but not less
than two directors, shall constitute a quorum for the transaction of business.
If there be less than a quorum present at any meeting of the Board, a majority
of those present may adjourn the meeting from time to time.

     The action of a majority of the directors present at a meeting at which a
quorum is present shall be the action of the Board unless the concurrence of a
greater proportion is required for such action by statute, the Articles of
Incorporation or these By-Laws.

     SECTION 4.  BOARD OPERATIONS COMMITTEE.  The Board of Directors may appoint
                 --------------------------                                     
those of its members who are not interested persons (as defined in the
Investment Company Act of 1940) of the Corporation as a Board Operations
Committee, which committee shall have the authority generally to direct the
operations of the Board of Directors including (a) the nomination for
appointment by the Board from among the members of the Board Operations
Committee of the members of the Audit Committee, the Director Nominating
Committee and the Portfolio Transactions Committee, (b) the nomination for
appointment by the Board of such other committees, if any, as the Board
Operations Committee shall determine, (c) the power of the Board to select legal
counsel for the Corporation, (d) the recommendation to the Board of (i) matters
to be submitted to the shareholders of the Corporation for consideration and
(ii) the recommendations to be made to the shareholders with respect thereto,
and (e) control of the agenda for meetings or other action of the Board.

     SECTION 5.  AUDIT COMMITTEE.  The Board of Directors may appoint two or
                 ---------------                                            
more of its members nominated by the Board Operations Committee for that purpose
as an Audit Committee, such committee to be composed of two or more directors.
The Audit Committee shall (a) recommend independent public accountants for
selection by the Board, (b) review the scope of audit, accounting and financial
internal controls and the quality and adequacy of the Corporation's accounting
staff with 

                                       3
<PAGE>
 
the independent public accountants and such other persons as may be deemed
appropriate, (c) review reports of the independent public accountants and
comment to the Board when warranted, (d) report to the Board at least once each
year and at such other times as the committee deems desirable, and (e) be
directly available at all times to the independent public accountants and
responsible officers of the Corporation for consultation on audit, accounting
and related financial matters.

     SECTION 6.  DIRECTOR NOMINATING COMMITTEE.  The Board of Directors may
                 -----------------------------                             
appoint those of its members nominated by the Board Operations Committee for
that purpose as a Director Nominating Committee, such committee to be composed
of two or more directors.  The Director Nominating Committee shall recommend to
the Board a slate of persons to be nominated for election as directors by the
shareholders at each annual meeting of shareholders and a person to be elected
to fill any vacancy occurring for any reason in the Board.

     SECTION 7.  PORTFOLIO TRANSACTIONS COMMITTEE.  The Board of Directors may
                 --------------------------------                             
appoint those of its members nominated by the Board Operations Committee for
that purpose as a Portfolio Transactions Committee, such committee to be
composed of two or more directors.  The Portfolio Transactions Committee shall
maintain familiarity with, report to the Board concerning, and make such
recommendations to the Board as it may deem appropriate with respect to, the
practices followed in the handling of orders to buy and sell portfolio
securities for the Corporation.

     SECTION 8.  EXECUTIVE COMMITTEE.  The Board of Directors may appoint those
                 -------------------                                           
of its members nominated by the Board Operations Committee for that purpose as
an Executive Committee, such committee to be composed of two or more directors.
In the intervals between meetings of the Board, the Executive Committee shall
have the power of the Board to (a) determine the value of securities and assets
owned by the Corporation, (b) elect or appoint officers of the Corporation to
serve until the next meeting of the Board and (c) take such action as may be
necessary to manage the portfolio security loan business of the Corporation.

     All action by the Executive Committee shall be recorded and reported to the
Board at its meeting next succeeding such action.

     SECTION 9.  OTHER COMMITTEES.  The Board of Directors may appoint from
                 ----------------                                          
among its members other committees composed of two or more directors which shall
have such powers as may be delegated or authorized by the resolution appointing
them.

     SECTION 10.  COMMITTEE PROCEDURES.  The Board of Directors may at any time,
                  --------------------                                          
in conformity with the recommendations of the Board Operations Committee, change
the members of any committee, fill vacancies or discharge any committee.

     In the absence of any member of any committee, the member or members
thereof present at any meeting, whether or not they constitute a quorum, may
appoint to act in the place of such absent member a member of the Board who,
except in the case of the Executive Committee, is not an interested person (as
defined in the Investment Company Act of 1940) of the Corporation.

                                       4
<PAGE>
 
     Each committee may fix its own rules of procedure and may meet as and when
provided by those rules.

     A majority of the members of the Board Operations Committee, and two or
more members of any other committee, shall constitute a quorum unless the Board
shall otherwise provide.

     Copies of the minutes of all meetings of committees other than the
Nominating Committee and the Executive Committee shall be distributed to the
Board unless the Board shall otherwise provide.

     SECTION 11.  TELEPHONE MEETINGS.  Members of the Board of Directors or a
                  ------------------                                         
committee of the Board of Directors may participate in a meeting by means of a
conference telephone or similar communications equipment if all persons
participating in the meeting can hear each other at the same time.
Participation in a meeting by these means constitutes presence in person at the
meeting.

     SECTION 12.  ACTION WITHOUT A MEETING.  Any action required or permitted to
                  ------------------------                                      
be taken at any meeting of the Board of Directors or of any committee thereof
may be taken without a meeting if a written consent to such action is signed by
all members of the Board or of such committee, as the case may be, and such
written consent is filed with the minutes of proceedings of the Board or
committee.

     SECTION 13.  COMPENSATION OF DIRECTORS.  The Board of Directors shall have
                  -------------------------                                    
the authority to fix the compensation of the directors for services in any
capacity.

                                  ARTICLE III.

                                   OFFICERS.

     SECTION 1.  OFFICERS.  The executive officers of the Corporation shall be
                 --------                                                     
elected by the Board of Directors and shall be a Chairman of the Board, who
shall be the chief executive officer of the Corporation, a President, one or
more Vice-Presidents, a Secretary and a Treasurer.  The Chairman of the Board
shall be selected from among the directors.  The Board may also appoint such
other officers, employees and agents as it may deem appropriate.  Any two or
more offices, except those of President and Vice-President, may be held by the
same person but no person shall execute, acknowledge or verify any instrument in
more than one capacity, if such instrument is required by law, the Articles of
Incorporation or these By-Laws to be executed, acknowledged or verified by two
or more officers.

     SECTION 2.  TERM.  Officers shall serve for one year and until their
                 ----                                                    
successors are elected and shall qualify, but any officer may be removed (except
as a director) by action of a majority of the entire Board of Directors
whenever, in the judgment of the Board, the best interests of the Corporation
will be served thereby, but such removal shall be without prejudice to the
contractual rights, if any, of the person so removed.

     SECTION 3.  AUTHORITY AND DUTIES.  All officers and agents of the
                 --------------------                                 
Corporation shall have such authority and perform such duties in the management
of the property and affairs of the

                                       5
<PAGE>
 
Corporation as generally pertain to their respective offices, as well as such
authority and duties as may be determined by resolution of the Board of
Directors.

     Without limiting the generality of the foregoing and subject to the
provisions of the Articles of Incorporation of the Corporation and to the order
of the Board of Directors, the Treasurer shall be the chief financial and
accounting officer of the Corporation and as such shall receive, or cause to be
received, and give, or cause to be given, receipt for all funds and securities
paid or delivered to, or for the account of the Corporation; shall cause such
funds and securities to be deposited for the account of the Corporation; with
such custodians as may be designated by the Board of Directors; shall pay or
cause to be paid out of the funds of the Corporation all just debts of the
Corporation upon their maturity; shall maintain, or cause to be maintained,
accurate records of all receipts, disbursements, assets, liabilities and
transactions of the Corporation; shall see that adequate audits thereof are
regularly made; and shall, when required by the Board of Directors, render
accurate statements of the condition of the Corporation.

     SECTION 4.  COMPENSATION OF OFFICERS.  The Board of Directors may determine
                 ------------------------                                       
what, if any, compensation shall be paid to officers of the Corporation.

                                  ARTICLE IV.

                                INDEMNIFICATION.

     The Corporation may indemnify any person, made a party to any action by or
in the right of the Corporation to procure a judgment in its favor, by reason of
the fact that he, his testator or intestate, is or was a director or officer of
the Corporation, against the reasonable expenses, including attorneys' fees,
actually and necessarily incurred by him in connection with the defense of such
action, or in connection with an appeal therein, except in relation to matters
as to which such director or officer is adjudged to have breached his duty to
the Corporation as such director or officer.  Such indemnification shall in no
case include amounts paid in settling or otherwise disposing of a threatened
action, or a pending action with or without court approval, or expenses incurred
in defending a threatened action, or a pending action which is settled or
otherwise disposed of without court approval.

     The Corporation may indemnify any person made, or threatened to be made, a
party to an action or proceeding other than one by or in the right of the
Corporation to procure a judgment in its favor, whether civil or criminal,
including an action by or in the right of any other corporation of any type or
kind, domestic or foreign, which any director or officer of the Corporation,
served in any capacity at the request of the Corporation, by reason of the fact
that he, his testator or intestate, was a director or officer of the Corporation
or served such other corporation in any capacity, against judgments, fines,
amounts paid in settlement and reasonable expenses, including attorneys' fees
actually and necessarily incurred as a result of such action or proceeding, or
any appeal therein, if such director or officer acted, in good faith, for a
purpose which he reasonably believed to be in the best interests of the
Corporation and, in criminal actions or proceedings, in addition, had no
reasonable cause to believe that his conduct was unlawful.  The termination of
any such civil or criminal action or proceeding by judgment, settlement,
conviction or upon a plea of nolo contendere, or its equivalent, shall not in
itself create a presumption that any such director 

                                       6
<PAGE>
 
or officer did not act, in good faith, for a purpose which he reasonably
believed to be in the best interests of the Corporation or that he had
reasonable cause to believe that his conduct was unlawful.

     A person who has been wholly successful, on the merits or otherwise, in the
defense of a civil or criminal action or proceeding of the character described
in the first two paragraphs of this Article shall be entitled to indemnification
as authorized in such paragraphs.  Except as provided in the preceding
sentence, any indemnification under such paragraphs, unless ordered by a court,
shall be made by the Corporation, only if authorized in the specific case:

               (A)  By the Board of Directors acting by a quorum consisting of
          directors who are not parties to such action or proceeding upon a
          finding that the director or officer has met the standard of conduct
          set forth in the first or second paragraph of this Article, as the
          case may be, or,

               (B)  If such a quorum is not obtainable with due diligence:

                    (1)  By the Board of Directors upon the opinion in writing
               of independent legal counsel that indemnification is proper in
               the circumstances because the applicable standards of conduct set
               forth in such paragraphs has been met by such director or
               officer, or

                    (2)  By the shareholders upon a finding that the director or
               officer has met the applicable standard of conduct set forth in
               such paragraphs.

     Expenses, including attorneys' fees, incurred in defending a civil or
criminal action or proceeding may be paid by the Corporation in advance of the
final disposition of such action or proceeding if authorized under the preceding
sentence, subject to repayment to the Corporation by the person receiving such
advancement in case he is ultimately found not to be entitled to indemnification
or, where indemnification is granted, to the extent the expenses so advanced by
the Corporation exceed the indemnification to which he is entitled.

     Nothing herein shall affect the right of any person to be awarded
indemnification, including attorneys' fees, by a court in accordance with law.

     If any expenses or other amounts are paid by way of indemnification,
otherwise than by court order or action by the shareholders, the Corporation
shall, not later than the next annual meeting of shareholders unless such
meeting is held within three months from the date of such payment, and, in any
event, within fifteen months from the date of such payment, mail to its
shareholders of record at the time entitled to vote for the election of
directors a statement specifying the persons paid, the amounts paid, and the
nature and status at the time of such payment of the litigation or threatened
litigation.

                                       7
<PAGE>
 
     To the extent permitted by law, the provisions of this Article shall apply
to all alleged or actual causes of action, whenever heretofore or hereafter
accrued, asserted against any person designated in the first two paragraphs
herof.

     Indemnification provided for in this Article shall not be deemed exclusive
of any other rights to which any person may lawfully be entitled under any By-
Law, agreement, vote of shareholders, or otherwise.

                                   ARTICLE V.

                                 CAPITAL STOCK.

     SECTION 1.  CERTIFICATES OF STOCK.  Each shareholder shall be entitled to a
                 ---------------------                                          
certificate or certificates which shall represent and certify the class and the
number of whole shares of stock owned by him in the Corporation.  Each
certificate shall be signed by the Chairman of the Board, President or a Vice-
President and countersigned by the Secretary or an Assistant Secretary or the
Treasurer or an Assistant Treasurer and shall be sealed with the corporate seal.
The signatures may be either manual or facsimile signatures and the seal may be
either facsimile or any other form of seal.  In case any officer who has signed
any certificate ceases to be an officer of the Corporation before the
certificate is issued, the certificate may nevertheless be issued by the
Corporation with the same effect as if the officer had not ceased to be such
officer as of the date of its issue.

     SECTION 2.  LOST CERTIFICATES.  The Board of Directors may determine the
                 -----------------                                           
conditions upon which a new certificate of stock may be issued in place of a
certificate which is alleged to have been lost, destroyed or stolen.  It may, in
its discretion, require the owner of such certificate to give bond, with
sufficient surety, to the Corporation to indemnify it against any loss or claim
which may arise by reason of the issuance of a new certificate.

     SECTION 3.  RECORD DATES; CLOSING OF TRANSFER BOOKS.  The Board of
                 ---------------------------------------               
Directors may fix, in advance, a date as the record date for the purpose of
determining shareholders entitled to notice of, or to vote at, any meeting of
shareholders, or shareholders entitled to receive payment of any dividend or the
allotment of any rights, or in order to make a determination of shareholders for
any other proper purpose.  Such date in any case shall be not more than ninety
days, and in the case of a meeting of shareholders, not less than ten days,
prior to the date of the action that requires such determination.

     SECTION 4.  STOCK LEDGER.  An original or duplicate stock ledger containing
                 ------------                                                   
the names and addresses of all shareholders and the number of shares of each
class held by each shareholder, shall be kept by the Secretary at the office of
the Corporation in the City of New York, or in Jersey City, New Jersey, or at
such other office or agency of the Corporation in the City of New York and
Jersey City, as the Board of Directors may from time to time by resolution
determine.

                                       8
<PAGE>
 
                                  ARTICLE VI.

                              CHECKS, NOTES, ETC.

     All checks and drafts on the Corporation's bank accounts and all bills of
exchange and promissory notes, and all acceptances, obligations and other
instruments for the payment of money, shall be signed by such officer or
officers, or agent or agents, as shall be thereunto authorized from time to time
by the Board of Directors.

                                  ARTICLE VII.

                               BOOKS AND RECORDS.

     The books of the Corporation other than the original or duplicate stock
ledger may be kept at such place or places in or out of the State of Maryland as
the Board of Directors may from time to time determine.

                                 ARTICLE VIII.

                                     SEAL.

     The Board of Directors shall provide a suitable corporate seal, in such
form and bearing such inscriptions as they may determine.

                                  ARTICLE IX.

                                  FISCAL YEAR.

     The fiscal year of the Corporation shall be the calendar year, subject,
however, to change from time to time by the Board of Directors.

                                   ARTICLE X.

                                   CUSTODIAN.

     All securities and funds of the Corporation shall be held by one or more
custodians each of which shall be a bank or trust company having not less than
$2,500,000 aggregate capital, surplus and undivided profits, as shown by its
last published report, provided any such custodian can be found ready and
willing to act.

     The terms of custody of such securities and funds shall include provisions
to the effect that the custodian shall deliver securities owned by the
Corporation only (a) upon sales of such securities for the account of the
Corporation and receipt by the custodian of payment therefor, (b) when such
securities are called, redeemed or retired or otherwise become payable, (c) in
exchange for or upon conversion into other securities alone or other securities
and cash, whether pursuant to any plan of merger, consolidation, 

                                       9
<PAGE>
 
reorganization, recapitalization or readjustment, or otherwise, (d) upon
conversion of such securities pursuant to their terms into other securities, (e)
upon exercise of subscription, purchase or other similar rights represented by
such securities, (f) for the purpose of exchanging interim receipts or temporary
securities for definitive securities, (g) for the purpose of redeeming in kind
shares of the capital stock of the Corporation, (h) for loans of securities by
the Corporation, or (i) for other proper corporate purposes.

     Such terms of custody shall also include provisions to the effect that the
custodian shall deliver funds of the Corporation only (a) upon the purchase of
securities for the portfolio of the Corporation and the delivery of such
securities to the custodian, (b) for the repurchase or redemption of shares of
the capital stock of the Corporation, (c) for the payment of dividends, taxes,
management or supervisory fees or operating expenses, (d) for payments in
connection with the conversion, exchange or surrender of securities owned by the
Corporation, (e) for payments in connection with the return of securities loaned
by the Corporation or the reduction of cash collateral, or (f) for other proper
corporate purposes.

     Upon the resignation or inability of any such custodian to serve, the
Corporation shall (a) use its best efforts to obtain a successor custodian, (b)
require the funds and securities of the Corporation held by the custodian to be
delivered to the successor custodian, and (c) in the event that no successor
custodian can be found, submit to the shareholders of the Corporation, before
permitting delivery of such funds and securities to anyone other than a
successor custodian, the question whether the Corporation shall be dissolved or
shall function without a custodian; provided, however, that nothing herein
contained shall prevent the termination of any agreement between the Corporation
and any such custodian with respect to any class of the Corporation's shares of
capital stock (and with respect to the assets and liabilities belonging to such
Class) by the affirmative vote of the holders of a majority of the outstanding
shares of such class or classes voting as single class) entitled to vote.

     Such terms of custody shall further provide that, pending appointment of a
successor custodian or a vote of the shareholders of the affected class or
classes to function without a custodian, a custodian shall not deliver funds and
other property of the Corporation to the Corporation, but may deliver them to a
bank or trust company of its own selection having not less than $2,500,000
aggregate capital, surplus, and undivided profits, as shown by its last
published report, as custodian for the Corporation to be held under terms
similar to those under which they were held by the retiring custodian.

     Subject to such rules, regulations and orders as the Securities and
Exchange Commission may adopt, the Corporation may authorize or direct a
custodian to deposit all or any part of the securities owned by the Corporation
in a system for the central handling of securities established by a national
securities exchange or a national securities association registered with the
Securities and Exchange Commission under the Securities Exchange Act of 1934, or
such other person as may be permitted by the Commission, pursuant to which
system all securities of any particular class or series of any issuer deposited
within the system are treated as fungible and may be transferred or pledged by
bookkeeping entry without physical delivery of such securities, provided that
all such deposits shall be subject to withdrawal only upon the order of the
custodian.

     The Corporation may also have such transfer agents and registrars of the
shares of its capital stock as the Board of Directors shall from time to time
determine.  The Board of Directors may employ and fix the powers, rights,
duties, responsibilities, privileges, immunities, and compensation 

                                       10
<PAGE>
 
of any such custodian, transfer agent, or registrar, subject however, in the
case of any such custodian, to the foregoing provision of this paragraph.

     As used herein, the term "receipt by the custodian of payment" shall
include the receipt of (a) a certified or official bank check, (b) any advice
that funds have been or will be credited to the account of the custodian at a
clearing agency registered under the Securities Exchange Act of 1934, or (c) a
bank wire from a correspondent bank of the custodian.  As used herein, the term
"delivery of such securities to the custodian" shall include the receipt of (a)
securities in bearer form or in proper form for transfer, or (b) any advice that
securities have been credited to the account of the custodian at a clearing
agency registered under the Securities Exchange Act of 1934, or at the Federal
Reserve Bank of New York.

                                  ARTICLE XI.

                                  AMENDMENTS.

     The Board of Directors is authorized and empowered to make, alter or repeal
the By-Laws of the Corporation, in any manner not inconsistent with the laws of
the State of Maryland or the Articles of Incorporation of the Corporation.

                                       11

<PAGE>
 
                                                                       EXHIBIT 6

                            DISTRIBUTING AGREEMENT
                            ----------------------


     DISTRIBUTING AGREEMENT, dated as of January 1, 1993, between SELIGMAN
COMMON STOCK FUND, INC., a Maryland corporation (the "Fund"), and SELIGMAN
FINANCIAL SERVICES, INC., a Delaware corporation ("Seligman Financial
Services").

     In consideration of the mutual agreements herein made, the parties hereto
agree as follows:

1.   Exclusive Distributor.  The Fund hereby agrees that Seligman Financial
     ---------------------                                                 
     Services shall be for the period of this Agreement exclusive agent for
     distribution within the United States and its territories, and Seligman
     Financial Services agrees to use its best efforts during such period to
     effect such distribution of shares of Capital Stock ("Shares") of the Fund;
                                                                                
     provided, however, that nothing herein shall prevent the Fund, if it so
     --------  -------                                                      
     elects, from selling or otherwise distributing its Shares directly to any
     persons other than dealers.  The Fund understands that Seligman Financial
     Services also acts as agent for distribution of the shares of capital stock
     or beneficial interest of other open-end investment companies which have
     entered into management agreements with J. & W. Seligman & Co. Incorporated
     (the "Manager").

2.   Sales of Shares.  Seligman Financial Services is authorized, as agent for
     ---------------                                                          
     the Fund and not as principal, (a) to sell Shares of the Fund to such
     dealers as Seligman Financial Services may select pursuant to the terms of
     written sales agreements (which may also relate to sales of shares of
     capital stock or shares of beneficial interest of other open-end investment
     companies which have entered into management agreements with the Manager),
     in form or forms approved by the Fund, and (b) to sell Shares of the Fund
     to other purchasers on such terms as may be provided in the then current
     prospectus of the Fund relating to such Shares; provided, however, that no
                                                     --------  -------         
     sales of Shares shall be confirmed by Seligman Financial Services at any
     time when, according to advice received by Seligman Financial Services from
     the Fund, the officers of the Fund have for any reason sufficient to them
     temporarily or permanently suspended or discontinued the sale and issuance
     of the Shares.  Each sale of Shares shall be effected by Seligman Financial
     Services only at the applicable price determined by the Fund in the manner
     prescribed in its then current prospectus relating to such Shares.
     Seligman Financial Services shall comply with all applicable laws, rules
     and regulations including, without limiting the generality of the
     foregoing, all rules or regulations made or adopted pursuant to Section 22
     of the Investment Company Act of 1940 (the "1940 Act") by the 

                                       1
<PAGE>
 
     Securities and Exchange Commission or any securities association registered
     under the Securities Exchange Act of 1934.

                                       2
<PAGE>
 
     The Fund agrees, as long as its Shares may legally be issued, to fill all
orders confirmed by Seligman Financial Services in accordance with the
provisions of this Agreement.

3.   Repurchase Agent.  Seligman Financial Services is authorized, as agent for
     ----------------                                                          
     the Fund and not as principal, to accept offers for resale to the Fund and
     to repurchase on behalf of the Fund Shares of the Fund at net asset values
     determined by the Fund in conformity with its then current prospectus
     relating to such Shares.

4.   Compensation.  As compensation for the services of Seligman Financial
     ------------                                                         
     Services under this Agreement, Seligman Financial Services shall be
     entitled to receive the sales charge, determined in conformity with the
     Fund's then current prospectus relating to such Shares, on all sales of
     Shares of the Fund confirmed by Seligman Financial Services hereunder and
     for which payment has been received, less the dealers' concession allowed
     in respect of such sales.  In addition, in accordance with the terms of the
     Fund's Administration, Shareholder Services and Distribution Plan (the
     "Plan"), the Fund may make payments from time to time to Seligman Financial
     Services in accordance with the terms and limitations of, and for the
     purposes set forth in the Plan.

5.   Expenses.  Seligman Financial Services agrees promptly to pay or reimburse
     --------                                                                  
     the Fund for all expenses (except expenses incurred by the Fund in
     connection with the preparation, printing and distribution of any
     prospectus or report or other communication to shareholders, to the extent
     that such expenses are incurred to effect compliance with any Federal or
     State law or to enable such distribution to shareholder(s) (a) of printing
     and distributing copies of any prospectus and of preparing, printing and
     distributing any other material used by Seligman Financial Services in
     connection with offering Shares of the Fund for sale, and (b) of
     advertising in connection with such offering.  The Fund agrees to pay all
     expenses in connection with the registration of Shares of the Fund under
     the Securities Act of 1933 (the "Act"), all fees and related expenses which
     may be incurred in connection with the qualification of Shares of the Fund
     for sale in such States (as well as the District of Columbia, Puerto Rico
     and other territories) as Seligman Financial Services may designate, and
     all expenses in connection with maintaining facilities for the issue and
     transfer of its Shares, of supplying information, prices and other data to
     be furnished by it hereunder, and through Union Data Service Center, Inc.,
     of all data processing and related services related to the share
     distribution activity contemplated hereby.

     The Fund agrees to execute such documents and to furnish such information
     as may be reasonably necessary, in the discretion of the Directors of the
     Fund, in

                                       3
<PAGE>
 
     connection with the qualification of Shares of the Fund for sale in such
     States (as well as the District of Columbia, Puerto Rico and other
     territories) as Seligman Financial Services may designate. Seligman
     Financial Services also agrees to pay all fees and related expenses
     connected with its own qualification as a broker or dealer under Federal or
     State laws and, except as otherwise specifically provided in this Agreement
     or agreed to by the Fund, all other expenses incurred by Seligman Financial
     Services in connection with the sale of Shares of the Fund as contemplated
     in this Agreement (including the expenses of qualifying the Fund as a
     dealer or broker under the laws of such States as may be designated by
     Seligman Financial Services, if deemed necessary or advisable by the Fund).

     It is understood and agreed that any payments made to Seligman Financial
     Services pursuant to the Plan may be used to defray some or all of the
     expenses incurred by Seligman Financial Services pursuant to this
     Agreement.

6.   Prospectus and Other Information.  The Fund represents and warrants to and
     --------------------------------                                          
     agrees with Seligman Financial Services that:

     (a)  A registration statement, including one or more prospectuses relating
          to the Shares, has been filed by the Fund under the Act and has become
          effective.  Such registration statement, as now in effect and as from
          time to time hereafter amended, and also any other registration
          statement relating to the Shares which may be filed by the Fund under
          the Act which shall become effective, is herein referred to as the
          "Registration Statement", and any prospectus or prospectuses filed by
          the Fund as a part of the Registration Statement, as the "Prospectus".

     (b)  At all times during the term of this Agreement, except when the
          officers of the Fund have suspended or discontinued the sale and
          issuance of Shares of the Fund as contemplated by Section 2 hereof,
          the Registration Statement and Prospectus will conform in all respects
          to the requirements of the Act and the rules and regulations of the
          Securities and Exchange Commission, and neither of such documents will
          include any untrue statement of a material fact or omit to state any
          material fact required to be stated therein or necessary to make the
          statement therein not misleading, except that the foregoing does not
          apply to any statements or omissions in either of such documents based
          upon written information furnished to the Fund by Seligman Financial
          Services specifically for use therein.

                                       4
<PAGE>
 
     The Fund agrees to prepare and furnish to Seligman Financial Services from
     time to time a copy of its Prospectus, and authorizes Seligman Financial
     Services to use such Prospectus, in the form furnished to Seligman
     Financial Services from time to time, in connection with the sale of the
     Fund's Shares.  The Fund also agrees to furnish Seligman Financial Services
     from time to time, for use in connection with the sale of such Shares, such
     information with respect to the Fund and its Shares as Seligman Financial
     Services may reasonably request.

7.   Reports.  Seligman Financial Services will prepare and furnish to the
     -------                                                              
     Directors of the Fund at least quarterly a written report complying with
     the requirements of Rule 12b-1 under the 1940 Act setting forth all amounts
     expended under the Plan and the purposes for which such expenditures were
     made.

8.   Indemnification.  (a) The Fund will indemnify and hold harmless Seligman
     ---------------                                                         
     Financial Services and each person, if any, who controls Seligman Financial
     Services within the meaning of the Act against any losses, claims, damages
     or liabilities to which Seligman Financial Services or such controlling
     person may become subject, under the Act or otherwise, insofar as such
     losses, claims, damages or liabilities (or actions in respect thereof)
     arise out of or are based upon any untrue statement or alleged untrue
     statement of a material fact contained in the Fund's Registration Statement
     or Prospectus or any other written sales material prepared by the Fund
     which is utilized by Seligman Financial Services in connection with the
     sale of Shares or arise out of or are based upon the omission or alleged
     omission to state therein a material fact required to be stated therein or
     (in the case of the Registration Statement and Prospectus) necessary to
     make the statements therein not misleading or (in the case of such other
     sales material) necessary to make the statements therein not misleading in
     the light of the circumstances under which they were made; and will
     reimburse Seligman Financial Services and each such controlling person for
     any legal or other expenses reasonably incurred by Seligman Financial
     Services or such controlling person in connection with investigating or
     defending any such loss, claim, damage, liability or action; provided,
                                                                  -------- 
     however, that the Fund will not be liable in any such case to the extent
     -------                                                                 
     that any such loss, claim, damage or liability arises out of or is based
     upon any untrue statement or alleged untrue statement or omission or
     alleged omission made in such Registration Statement or Prospectus in
     conformity with written information furnished to the Fund by Seligman
     Financial Services specifically for use therein; and provided, further,
     that nothing herein shall be so construed as to protect Seligman Financial
     Services against any liability to the Fund or its security holders to which
     Seligman Financial Services would otherwise be subject by reason of willful
     misfeasance, bad faith or gross negligence, in the 

                                       5
<PAGE>
 
     performance of its duties, or by reason of the reckless disregard by
     Seligman Financial Services of its obligations and duties under this
     Agreement. This indemnity agreement will be in addition to any liability
     which the Fund may otherwise have.

     (b)  Seligman Financial Services will indemnify and hold harmless the Fund,
          each of its Directors and officers and each person, if any, who
          controls the Fund within the meaning of the Act, against any losses,
          claims, damages or liabilities to which the Fund or any such Director,
          officer or controlling person may become subject, under the Act or
          otherwise, insofar as such losses, claims, damages or liabilities (or
          actions in respect thereof) arise out of or are based upon any untrue
          statement or alleged untrue statement of a material fact contained in
          the Registration Statement or Prospectus or any sales material not
          prepared by the Fund which is utilized in connection with the sale of
          Shares or arise out of or are based upon the omission or the alleged
          omission to state therein a material fact required to be stated
          therein or (in the case of the Registration Statement and Prospectus)
          necessary to make the statements therein not misleading or (in the
          case of such other sales material) necessary to make the statements
          therein not misleading in the light of the circumstances under which
          they were made, in the case of the Registration Statement and
          Prospectus to the extent, but only to the extent, that such untrue
          statement or alleged untrue statement or omission or alleged omission
          was made in conformity with written information furnished to the Fund
          by Seligman Financial Services specifically for use therein; and
          Seligman Financial Services will reimburse any legal or other expenses
          reasonably incurred by the Fund or any such Director, officer or
          controlling person in connection with investigating or defending any
          such loss, claim, damage, liability or action.  This indemnity
          agreement will be in addition to any liability which Seligman
          Financial Services may otherwise have.

     (c)  Promptly after receipt by an indemnified party under this Section of
          notice of the commencement of any action, such indemnified party will,
          if a claim in respect thereof is to be made against the indemnifying
          party under this Section, notify the indemnifying party of the
          commencement thereof; but the omission so to notify the indemnifying
          party will not relieve it from liability which it may have to any
          indemnified party otherwise than under this Section.  In case any such
          action is brought against any indemnified party, and it notifies the
          indemnifying party of the commencement thereof, the indemnifying party
          will be entitled to participate therein and, to the extent that it may
          wish, to assume the defense thereof, with counsel satisfactory to such
          indemnified party, and after notice from the indemnifying party to
          such indemnified party of its election to assume the defense thereof,
          the indemnifying party will not 

                                       6
<PAGE>
 
          be liable to such indemnified party under this Section for any legal
          or other expenses subsequently incurred by such indemnified party in
          connection with the defense thereof other than reasonable costs of
          investigation.

9.   Effective Date.  This Agreement shall become effective upon its execution
     --------------                                                           
     by an authorized officer of the respective parties to this Agreement, but
     in no event prior to shareholder approval of the Plan.

10.  Term of Agreement.  This Agreement shall continue in effect until December
     -----------------                                                         
     31 of the year in which it is first effective and through December 31 of
     each year thereafter if such continuance is approved in the manner required
     by the 1940 Act and the rules thereunder and Seligman Financial Services
     shall not have notified the Fund in writing at least 60 days prior to the
     anniversary date of the previous continuance that it does not desire such
     continuance.  This Agreement may be terminated at any time, without payment
     of penalty on 60 days' written notice to the other party by vote of a
     majority of the Directors of the Fund who are not interested persons (as
     defined in the 1940 Act) of the Fund and have no direct or indirect
     financial interest in the operation of the Plan or any agreement related
     thereto, or by vote of a majority of the outstanding voting securities of
     the Fund (as defined in the 1940 Act).  This Agreement shall automatically
     terminate in the event of its assignment (as defined in the 1940 Act).

11.  Miscellaneous.  This Agreement shall be governed by and construed in
     -------------                                                       
     accordance with the laws of the State of New York.  Anything herein to the
     contrary notwithstanding, this Agreement shall not be construed to require,
     or to impose any duty upon, either of the parties to do anything in
     violation of any applicable laws or regulations.

     IN WITNESS WHEREOF, the Fund and Seligman Financial Services have caused
this Agreement to be executed by their duly authorized officers as of the date
first above written.


                                  SELIGMAN COMMON STOCK FUND, INC.



                                  By____________________________________________
                                        Ronald T. Schroeder, President

                                       7
<PAGE>
 
                                  SELIGMAN FINANCIAL SERVICES, INC.



                                  By____________________________________________
                                        Donald R. Pitti, President

                                       8

<PAGE>
 
                                                                       EXHIBIT 8

                               CUSTODY AGREEMENT
                               -----------------

     THIS AGREEMENT made the ______ day of ____________, 19__, by and between
INVESTORS FIDUCIARY TRUST COMPANY, a trust company chartered under the laws of
the state of Missouri, having its trust office located at 127 West 10th Street,
Kansas City, Missouri  64105 ("Custodian"), and SELIGMAN COMMON STOCK FUND,
INC., a Maryland corporation, having its principal office and place of business
at One Bankers Trust Plaza, New York, New York  10006 ("Fund").

                                 WITNESSETH:

     WHEREAS,  Fund desires to appoint Investors Fiduciary Trust Company as
Custodian and Recordkeeper of the securities and monies of Fund and  its now
existing and future established portfolios (individually referred to herein as
Portfolio); and

     WHEREAS, Investors Fiduciary Trust Company is willing to accept such
appointment;

     NOW THEREFORE, for and in consideration of the mutual promises contained
herein, the parties hereto, intending to be legally bound, mutually covenant and
agree as follows:

1.   APPOINTMENT OF CUSTODIAN.   Fund hereby constitutes and appoints Custodian
     -------------------------                                                 
     as custodian of the Fund which is to include:

     A.   Appointment as custodian of the securities and monies at any time
          owned by each Portfolio of the Fund; and

     B.   Appointment as agent to perform certain accounting and recordkeeping
          functions required of a duly registered investment company in
          compliance with applicable provisions of federal, state, and local
          laws, rules and regulations including, as may be required:

                                       1
<PAGE>
 
          1.   Providing information necessary for Fund and each Portfolio to
               file required financial reports; maintaining and preserving
               required books, accounts and records as the basis for such
               reports; and performing

                                       2
<PAGE>
 
               certain daily functions in connection with such accounts and
               records, and
          2.   Calculating daily net asset value of each Portfolio of the Fund,
               and

          3.   Acting as liaison with independent auditors.

2.   DELIVERY OF CORPORATE DOCUMENTS.  Fund has delivered or will deliver to
     --------------------------------                                       
     Custodian prior to the effective date of this Agreement, copies of the
     following documents and all amendments or supplements thereto, properly
     certified or authenticated:

     A.   Resolutions of the Board of Directors of Fund appointing Custodian as
          custodian hereunder and approving the form of this Agreement; and

     B.   Resolutions of the Board of Directors of Fund designating certain
          persons to give instructions on behalf of Fund to Custodian and
          authorizing Custodian to rely upon such instructions.

3.   DUTIES AND RESPONSIBILITIES OF CUSTODIAN.
     -----------------------------------------

     A.   Delivery of Assets
          ------------------

          Fund will deliver or cause to be delivered to Custodian on the
          effective date of this Agreement, or as soon thereafter as
          practicable, and from time to time thereafter, all portfolio
          securities acquired by it and monies then owned by it (except as
          permitted by the Investment Company Act of 1940) or from time to time
          coming into its possession during the time this Agreement shall
          continue in effect.  Custodian shall have no responsibility or
          liability whatsoever for or on account of securities or monies not so
          delivered.   All securities so delivered to Custodian (other than
          bearer securities) shall be registered in the name of Fund or its
          nominee, or of a nominee of Custodian, or shall be properly endorsed
          and in form for transfer satisfactory to Custodian.

     B.   Delivery of Accounts and Records
          --------------------------------

          Fund shall turn over to Custodian all of the Fund's relevant accounts
          and records previously maintained by it.  Custodian shall be entitled
          to rely conclusively on the completeness and correctness of the
          accounts and records turned over to it by 

                                       3
<PAGE>
 
          Fund, and Fund shall indemnify and hold Custodian harmless of and from
          any and all expenses, damages and losses whatsoever arising out of or
          in connection with any error, omission, inaccuracy or other deficiency
          of such accounts and records or in the failure of Fund to provide any
          portion of such or to provide any information needed by the Custodian
          knowledgeably to perform its function hereunder.

     C.   Delivery of Assets to Third Parties
          -----------------------------------

          Custodian will receive delivery of and keep safely the assets of Fund
          delivered to it from time to time and the assets of each Portfolio
          segregated in a separate account.  Custodian will not deliver, assign,
          pledge or hypothecate any such assets to any person except as
          permitted by the provisions of this Agreement or any agreement
          executed by it according to the terms of section 3.S. of this
          Agreement.  Upon delivery of any such assets to a subcustodian
          pursuant to Section 3.S. of this agreement, Custodian will create and
          maintain records identifying those assets which have been delivered to
          the subcustodian as belonging to the applicable Portfolio of the Fund.
          The Custodian is responsible for the safekeeping of the securities and
          monies of Fund only until they have been transmitted to and received
          by other persons as permitted under the terms of this Agreement,
          except for securities and monies transmitted to United Missouri Bank
          of Kansas City, N.A. (UMBKC), United Missouri Trust Company of New
          York (UMBTC), First National Bank of Chicago (FNBC) for which
          Custodian remains responsible.  Custodian shall also be responsible
          for the monies and securities of Fund(s) held by eligible foreign
          subcustodians to the extent the domestic custodian with which the
          Custodian contracts is responsible to Custodian.  Custodian may
          participate directly or indirectly through a subcustodian in the
          Depository Trust Company, Treasury/Federal Reserve Book Entry System,
          Participant Trust Company or other depository approved by the Fund (as
          such entities are defined at 17 CFR Section 270.17f-4(b)).

                                       4
<PAGE>
 
     D.   Registration of Securities
          --------------------------

          Custodian  will hold stocks  and other  registerable portfolio
          securities of Fund registered  in the name of Fund  or its  nominee or
          in the name of any nominee of Custodian  for whose  fidelity and
          liability  Custodian will be fully responsible, or in street
          certificate form, so-called, with or without any indication of
          fiduciary capacity.  Unless otherwise instructed, Custodian will
          register all such portfolio securities in the name of its authorized
          nominee, as defined in the Internal Revenue Code and any Regulations
          of the Treasury Department issued thereunder or in any provision of
          any subsequent Federal tax law exempting such transaction from
          liability for stock transfer taxes.  All securities, and the ownership
          thereof by a Portfolio of the Fund, which are held by Custodian
          hereunder, however, shall at all times be identifiable on the records
          of the Custodian.  The Fund agrees to hold Custodian and its nominee
          harmless for any liability as a record holder of securities held in
          custody.

     E.   Exchange of Securities
          ----------------------

          Upon receipt of instructions as defined herein in Section 4.A,
          Custodian will exchange, or cause to be exchanged, portfolio
          securities held by it for the account of the applicable Portfolio of
          the Fund for other securities or cash issued or paid in connection
          with any reorganization, recapitalization, merger, consolidation,
          split-up of shares, change of par value, conversion or otherwise, and
          will deposit any such securities in accordance with the terms of any
          reorganization or protective plan.  Without instructions, Custodian is
          authorized to exchange securities held by it in temporary form for
          securities in definitive form, to effect an exchange of shares when
          the par value of the stock is changed, and, upon receiving payment
          therefor, to surrender bonds or other securities held by it at
          maturity or when advised of an earlier mandatory call for redemption,
          except that Custodian shall receive instructions prior to surrendering
          any convertible security.  Pursuant to this paragraph, the Custodian
          will inform the Fund of such corporate 

                                       5
<PAGE>
 
          actions and capital changes when it is informed of them through the
          publications it subscribes to.

     F.   Purchases of Investments of the Fund
          ------------------------------------
          Fund will, on each business day on which a purchase of securities
          shall be made by it, deliver to Custodian instructions which shall
          specify with respect to each such purchase:

          1.   The name of the Portfolio making such purchase;
          2.   The name of the issuer and description of the security;
          3.   The number of shares or the principal amount purchased, and
               accrued interest, if any;
          4.   The trade date;
          5.   The settlement date;
          6.   The purchase price per unit and the brokerage commission, taxes
               and other expenses payable in connection with the purchase;
          7.   The total amount payable upon such purchase; and
          8.   The name of the person from whom or the broker or dealer through
               whom the purchase was made.

          In accordance with such instructions, Custodian will pay for out of
          monies held for the account of such named Portfolio, but only insofar
          as monies are available therein for such purpose, and receive the
          portfolio securities so purchased by such named Portfolio, except that
          Custodian may in its sole discretion advance funds to the Fund which
          may result in an overdraft because the monies held by the Custodian on
          behalf of the Fund are insufficient to pay the total amount payable
          upon such purchase.  Such payment will be made only upon receipt by
          Custodian of the securities so purchased in form for transfer
          satisfactory to Custodian.  Custodian agrees to promptly inform Fund
          of any failures by sellers to make proper deliveries of securities
          purchased by the Fund.

     G.   Sales and Deliveries of Investments of the Fund - Other than Options
          --------------------------------------------------------------------
          and Futures
          -----------

                                       6
<PAGE>
 
          Fund will, on each business day on which a sale of investment
          securities of Fund has been made, deliver to Custodian instructions
          specifying with respect to each such sale:

          1.   The name of the Portfolio making such sale;
          2.   The name of the issuer and description of the securities;
          3.   The number of shares or principal amount sold, and accrued
               interest, if any;
          4.   The date on which the securities sold were purchased or other
               information identifying the securities sold and to be delivered;
          5.   The trade date;
          6.   The settlement date;
          7.   The sale price per unit and the brokerage commission, taxes or
               other expenses payable in connection with such sale;
          8.   The total amount to be received by Fund upon such sale; and
          9.   The name and address of the broker or dealer through whom or
               person to whom the sale was made.

          In accordance with such instructions, Custodian will deliver or cause
          to be delivered the securities thus designated as sold for the account
          of such Portfolio to the broker or other person specified in the
          instructions relating to such sale, such delivery to be made only upon
          receipt of payment therefor in such form as is satisfactory to
          Custodian, with the understanding that Custodian may deliver or cause
          to be delivered securities for payment in accordance with the customs
          prevailing among dealers in securities.  Custodian agrees to promptly
          inform Fund of any failures of purchasers to make proper payment for
          securities sold by Fund.

     H.   Purchases or Sales of Security Options, Options on Indices and
          --------------------------------------------------------------
          Security Index Futures Contracts
          --------------------------------

                                       7
<PAGE>
 
          Fund will, on each business day on which a purchase or sale of the
          following options and/or futures shall be made by it, deliver to
          Custodian instructions which shall specify with respect to each such
          purchase or sale:

          1.   The name of the Portfolio making such purchase or sale;

          2.   Security Options
               a.   The underlying security;
               b.   The price at which purchased or sold;
               c.   The expiration date;
               d.   The number of contracts;
               e.   The exercise price;
               f.   Whether the transaction is an opening, exercising, expiring
                    or closing transaction;
               g.   Whether the transaction involves a put or call;
               h.   Whether the option is written or purchased;
               i.   Market on which option traded;
               j.   Name and address of the broker or dealer through whom the
                    sale or purchase was made.

          3.   Options on Indices
               a.   The index;
               b.   The price at which purchased or sold;
               c.   The exercise price;
               d.   The premium;
               e.   The multiple;
               f.   The expiration date;
               g.   Whether the transaction is an opening, exercising, expiring
                    or closing transaction;
               h.   Whether the transaction involves a put or call;
               i.   Whether the option is written or purchased;

                                       8
<PAGE>
 
               j.   The name and address of the broker or dealer through whom
                    the sale or purchase was made, or other applicable
                    settlement instructions.

          4.   Security Index Futures Contracts
               a.   The last trading date specified in the contract and, when
                    available, the closing level, thereof;
               b.   The index level on the date the contract is entered into;
               c.   The multiple;
               d.   Any margin requirements;
               e.   The need for a segregated margin account (in addition to
                    instructions, and if not already in the possession of
                    Custodian, Fund shall deliver a substantially complete and
                    executed custodial safekeeping account and procedural
                    agreement which shall be incorporated by reference into this
                    Custody Agreement); and
               f.   The name and address of the futures commission merchant
                    through whom the sale or purchase was made, or other
                    applicable settlement instructions.

          5.   Option on Index Future Contracts
               a.   The underlying index futures contract;
               b.   The premium;
               c.   The expiration date;
               d.   The number of options;
               e.   The exercise price;
               f.   Whether the transaction involves an opening, exercising,
                    expiring or closing transaction;
               g.   Whether the transaction involves a put or call;
               h.   Whether the option is written or purchased; and
               i.   The market on which the option is traded.

                                       9
<PAGE>
 
     I.   Securities Pledged or Loaned
          ----------------------------

          If specifically allowed for in the prospectus of the applicable
          Portfolio of the Fund:

          1.   Upon receipt of instructions, Custodian will release or cause to
               be released securities held in custody to the pledgee designated
               in such instructions by way of pledge or hypothecation to secure
               any loan incurred by a Portfolio of the Fund; provided, however,
               that the securities shall be released only upon payment to
               Custodian of the monies borrowed, except that in cases where
               additional collateral is required to secure a borrowing already
               made, further securities may be released or caused to be released
               for that purpose upon receipt of instructions.  Upon receipt of
               instructions, Custodian will pay, but only from funds available
               for such purpose, any such loan upon redelivery to it of the
               securities pledged or hypothecated therefor and upon surrender of
               the note or notes evidencing such loan.

          2.   Upon receipt of instructions, Custodian will release securities
               held in custody to the borrower designated in such instructions;
               provided, however, that the securities will be released only upon
               deposit with Custodian of full cash collateral as specified in
               such instructions, and that Fund will retain the right to any
               dividends, interest or distribution on such loaned securities.
               Upon receipt of instructions and the loaned securities, Custodian
               will release the cash collateral to the borrower.

     J.   Routine Matters
          ---------------

          Custodian will, in general, attend to all routine and mechanical
          matters in connection with the sale, exchange, substitution, purchase,
          transfer, or other dealings with securities or other property of Fund
          except as may be otherwise provided in this Agreement or directed from
          time to time by the Board of Directors of Fund.

     K.   Deposit Account
          ---------------

                                       10
<PAGE>
 
          Custodian will open and maintain a special purpose deposit account(s)
          in the name of Custodian on behalf of each Portfolio (Accounts),
          subject only to draft or order by Custodian upon receipt of
          instructions.  All monies received by Custodian from or for the
          account of a Portfolio shall be deposited in said Accounts.  Barring
          events not in the control of the Custodian such as strikes, lockouts
          or labor disputes, riots, war or equipment or transmission failure or
          damage, fire, flood, earthquake or other natural disaster, action or
          inaction of governmental authority or other causes beyond its control,
          at 9:00 a.m., Kansas City time, on the second business day after
          deposit of any check into Fund's Account, Custodian agrees to make Fed
          Funds available to the appropriate Portfolio of the Fund in the amount
          of the check.  Deposits made by Federal Reserve wire will be available
          to the Fund immediately and ACH wires will be available to the Fund on
          the next business day.  Income earned on the portfolio securities will
          be credited to the applicable Portfolio of the Fund based on the
          schedule attached as Exhibit A, except that income earned on portfolio
          securities held by domestic subcustodians other than UMBKC, UMBTC,
          Bank of New York (previously Irving Trust Company and hereinafter
          referred to as BONY) and Morgan Guaranty and Trust Company (MGT) will
          be credited when received.  The Custodian will be entitled to reverse
          any credited amounts where credits have been made and monies are not
          finally collected.  If monies are collected after such reversal, the
          Custodian will credit the applicable Portfolio in that amount.
          Custodian may open and maintain an Account in such other banks or
          trust companies as may be designated by it and by properly authorized
          resolution of the Board of Directors of Fund, such Account, however,
          to be in the name of Custodian on behalf of the applicable portfolio
          of the Fund and subject only to its draft or order.

     L.   Income and other Payments to Fund
          ---------------------------------

          Custodian will:

                                       11
<PAGE>
 
          1.   Collect, claim and receive and deposit for the Account of each
               Portfolio of the Fund all income and other payments which become
               due and payable on or after the effective date of this Agreement
               with respect to the securities deposited under this Agreement,
               and credit the account of the applicable Portfolio of the Fund in
               accordance with the schedule attached hereto as Exhibit A, except
               that income earned on portfolio securities held by domestic
               subcustodians other than UMBKC, UMBTC, BONY, and MGT will be
               credited when received.  Income from foreign securities and
               assets held by eligible foreign subcustodians shall be credited
               by Custodian upon receipt of income from the domestic
               subcustodian contracting with the foreign eligible subcustodians.
               If, for any reason, the Fund is credited with income that is not
               subsequently collected, Custodian may reverse that credited
               amount;

          2.   Execute ownership and other certificates and affidavits for all
               federal, state and local tax purposes in connection with the
               collection of bond and note coupons; and

          3.   Take such other action as may be necessary or proper in
               connection with:

               a.   the collection, receipt and deposit of such income and other
                    payments, including but not limited to the presentation for
                    payment of:

                    1.   all coupons and other income items requiring
                         presentation; and

                    2.   all other securities which may mature or be called,
                         redeemed, retired or otherwise become payable and
                         regarding which the Custodian has actual knowledge, or
                         notice of which is contained in publications of the
                         type to which a custodian for investment companies
                         normally subscribes for such purpose; and

                                       12
<PAGE>
 
               b.   the endorsement for collection, in the name of the
                    applicable Portfolio of the Fund, of all checks, drafts or
                    other negotiable instruments.

          Custodian, however, will not be required to institute suit or take
          other extraordinary action to enforce collection except upon receipt
          of instructions and upon being indemnified to its satisfaction against
          the costs and expenses of such suit or other actions.  Custodian will
          receive, claim and collect all stock dividends, rights and other
          similar items and will deal with the same pursuant to instructions.
          Unless prior instructions have been received to the contrary,
          Custodian will, without further instructions, sell any rights held for
          the account of Fund on the last trade date prior to the date of
          expiration of such rights.

     M.   Payment of Dividends and other Distributions
          --------------------------------------------

          On the declaration of any dividend or other distribution on the shares
          of Capital Stock of any Portfolio ("Portfolio Shares") by the Board of
          Directors of Fund, Fund shall deliver to Custodian instructions with
          respect thereto, including a copy of the Resolution of said Board of
          Directors certified by the Secretary or an Assistant Secretary of Fund
          wherein there shall be set forth the record date as of which
          shareholders entitled to receive such dividend or other distribution
          shall be determined, the date of payment of such dividend or
          distribution, and the amount payable per share on such dividend or
          distribution.  Except if the ex-dividend date and the reinvestment
          date of any dividend are the same, in which case funds shall remain in
          the Custody Account, on the date specified in such Resolution for the
          payment of such dividend or other distribution, Custodian will pay out
          of the monies held for the account of the applicable Portfolio of the
          Fund, insofar as the same shall be available for such purposes, and
          wire to the account of the Dividend Disbursing Agent for Fund, such
          amount as may be necessary to pay the amount per share payable in cash
          on Portfolio Shares issued and outstanding on the record date
          established by such Resolution.

                                       13
<PAGE>
 
     N.   Shares of Fund Purchased by Fund
          --------------------------------

          Whenever any Portfolio Shares are repurchased or redeemed by Fund,
          Fund or its agent shall advise Custodian of the aggregate dollar
          amount to be paid for such shares and shall confirm such advice in
          writing.  Upon receipt of such advice, Custodian shall charge such
          aggregate dollar amount to the Account of Portfolio and either deposit
          the same in the account maintained for the purpose of paying for the
          repurchase or redemption of Portfolio Shares or deliver the same in
          accordance with such advice.

          Custodian shall not have any duty or responsibility to determine that
          Fund Shares have been removed from the proper shareholder account or
          accounts or that the proper number of such shares have been canceled
          and removed from the shareholder records.

     O.   Shares of Fund Purchased from Fund
          ----------------------------------

          Whenever Portfolio Shares are purchased from Fund, Fund will deposit
          or cause to be deposited with Custodian the amount received for such
          shares.  Custodian shall not have any duty or responsibility to
          determine that Portfolio Shares purchased from Fund have been added to
          the proper shareholder account or accounts or that the proper number
          of such shares have been added to the shareholder records.

     P.   Proxies and Notices
          -------------------

          Custodian will  promptly  deliver or mail or  have delivered or mailed
          to Fund all proxies properly signed, all notices of  meetings, all
          proxy  statements and other notices, requests or announcements
          affecting  or relating to securities held by Custodian for Fund and
          will,  upon  receipt of instructions, execute and deliver or cause its
          nominee to execute and deliver or mail or have delivered or mailed
          such proxies or other authorizations as may be required.  Except as
          provided by this Agreement or pursuant to instructions hereafter
          received by Custodian, neither it nor its nominee will exercise any
          power inherent in any such securities, including 

                                       14
<PAGE>
 
          any power to vote the same, or execute any proxy, power of attorney,
          or other similar instrument voting any of such securities, or give any
          consent, approval or waiver with respect thereto, or take any other
          similar action.

     Q.   Disbursements
          -------------

          Custodian will pay or cause to be paid insofar as funds are available
          for the purpose, bills, statements and other obligations of Fund
          (including but not limited to obligations in connection with the
          conversion, exchange or surrender of securities owned by Fund,
          interest charges, dividend disbursements, taxes, management fees,
          custodian fees, legal fees, auditors' fees, transfer agents' fees,
          brokerage commissions, compensation to personnel, and other operating
          expenses of Fund) pursuant to instructions of Fund setting forth the
          name of the person to whom payment is to be made, the amount of the
          payment, and the purpose of the payment.

     R.   Daily Statement of Accounts
          ---------------------------

          Custodian will, within a reasonable time, render to Fund as of the
          close of business on each day, a detailed statement of the amounts
          received or paid and of securities received or delivered for the
          account of Fund during said day.  Custodian will, from time to time,
          upon request by Fund, render a detailed statement of the securities
          and monies held for Fund under this Agreement, and Custodian will
          maintain such books and records as are necessary to enable it to do so
          and will permit such persons as are authorized by Fund including
          Fund's independent public accountants, access to such records or
          confirmation of the contents of such records; and if demanded, will
          permit federal and state regulatory agencies to examine the
          securities, books and records.  Upon the written instructions of Fund
          or as demanded by federal or state regulatory agencies, Custodian will
          instruct any subcustodian to give such persons as are authorized by
          Fund including Fund's independent public accountants, access to such
          records or confirmation of the contents of such records; and if
          demanded, to 

                                       15
<PAGE>
 
          permit federal and state regulatory agencies to examine the books,
          records and securities held by subcustodian which relate to Fund. Fund
          will be entitled to receive reports produced by the Custodian's
          portfolio accounting system, including without limitation, those
          listed on Exhibit C hereof.

     S.   Appointment of Subcustodians
          ----------------------------

          1.   Notwithstanding any other provisions of this Agreement, all of or
               any of the monies or securities of Fund may be held in
               Custodian's own custody or in the custody of one or more other
               banks or trust companies selected by Custodian and approved by
               the Fund's Board of Directors.  Any such subcustodian must have
               the qualifications required for custodian under the Investment
               Company Act of 1940, as amended.  The subcustodian may
               participate directly or indirectly in the Depository Trust
               Company, Treasury/Federal Reserve Book Entry System, Participant
               Trust Company or other depository approved by the Fund (as such
               entities are defined at 17 CFR Sec. 270.17f-4(b)).  The
               appointment of UMBKC or any other subcustodian, depository or
               clearing agency used by the Custodian and approved by the Fund
               will not relieve Custodian of any of its obligations hereunder
               except as provided in Section 3.C hereof.  The Custodian will
               comply with Section 17f-4 of the Investment Company Act of 1940,
               as amended, as to depositories and clearing agencies used by
               Custodian and approved the Fund.  The Custodian will not be
               entitled to reimbursement by Fund for any fees or expenses of any
               subcustodian, depository or clearing agency.

          2.   Notwithstanding any other provisions of this Agreement, Fund's
               foreign securities (as defined in Rule 17f-5(c)(1) under the
               Investment Company Act of 1940) and Fund's cash or cash
               equivalents, in amounts reasonably necessary to effect Fund's
               foreign securities transactions, may be held in the custody of
               one or more banks or trust companies acting as 

                                       16
<PAGE>
 
               subcustodians, according to Section 3.S.1; and thereafter,
               pursuant to a written contract or contracts as approved by Fund's
               Board of Directors, may be transferred to an account maintained
               by such subcustodian with an eligible foreign custodian, as
               defined in Rule 17f-5(c)(2), provided that any such arrangement
               involving a foreign custodian shall be in accordance with the
               provisions of Rule 17f-5 under the Investment Company Act of 1940
               as that Rule may be amended from time to time.

     T.   Accounts and Records
          --------------------

          Custodian, with the direction and as interpreted by the Fund, Fund's
          accountants and/or other tax advisors, will prepare and maintain as
          complete, accurate and current all accounts and records required to be
          maintained by Fund under the Internal Revenue Code of 1986 ("Code") as
          amended and under the general Rules and Regulations under the
          Investment Company Act of 1940 ("Rules") as amended, and as agreed
          upon between the parties and will preserve said records in the manner
          and for the periods prescribed in said Code and Rules, or for such
          longer period as is agreed upon by the parties.

          Custodian relies upon Fund to furnish, in writing, accurate and timely
          information to complete Fund's records and perform daily calculation
          of the Fund's net asset value, as provided in Section 3.W. below.

          Custodian shall incur no liability and Fund shall indemnify and hold
          harmless Custodian from and against any liability arising from any
          failure of Fund to furnish such information in a timely and accurate
          manner, even if Fund subsequently provides accurate but untimely
          information.  It shall be the responsibility of Fund to furnish
          Custodian with the declaration, record and payment dates and amounts
          of any dividends or income and any other special actions required
          concerning each of its securities when such information is not readily
          available from generally accepted securities industry services or
          publications.

                                       17
<PAGE>
 
     U.   Accounts and Records Property of Fund
          -------------------------------------

          Custodian acknowledges that all of the accounts and records maintained
          by Custodian pursuant to this Agreement are the property of Fund, and
          will be made available to Fund for inspection or reproduction within a
          reasonable period of time, upon demand.  Custodian will assist Fund's
          independent auditors, or upon approval of Fund, or upon demand, any
          regulatory body having jurisdiction over the Fund or Custodian, in any
          requested review of Fund's accounts and records but shall be
          reimbursed for all expenses and employee time invested in any such
          review outside of routine and normal periodic reviews.  Upon receipt
          from Fund of the necessary information, Custodian will supply
          necessary data for Fund's completion of any necessary tax returns,
          questionnaires, periodic reports to Shareholders and such other
          reports and information requests as Fund and Custodian shall agree
          upon from time to time.

     V.   Adoption of Procedures
          ----------------------

          Custodian and Fund may from time to time adopt procedures as they
          agree upon, and Custodian may conclusively assume that no procedure
          approved by Fund, or directed by Fund, conflicts with or violates any
          requirements of its prospectus, "Articles of Incorporation", Bylaws,
          or any rule or regulation of any regulatory body or governmental
          agency.  Fund will be responsible to notify Custodian of any changes
          in statutes, regulations, rules or policies which might necessitate
          changes in Custodian's responsibilities or procedures.

     W.   Calculation of Net Asset Value
          ------------------------------

          Custodian will calculate Fund's net asset value, in accordance with
          Fund's prospectus, once daily.  Custodian will prepare and maintain a
          daily evaluation of securities for which market quotations are
          available by the use of outside services normally used and contracted
          for this purpose; all other securities will be evaluated in accordance
          with Fund's instructions.  Custodian will have no 

                                       18
<PAGE>
 
          responsibility for the accuracy of the prices quoted by these outside
          services or for the information supplied by Fund or upon instructions.

     X.   Overdrafts
          ----------

          If Custodian shall in its sole discretion advance funds to the account
          of the Fund which results in an overdraft because the monies held by
          Custodian on behalf of the Fund are insufficient to pay the total
          amount payable upon a purchase of securities as specified in Fund's
          instructions or for some other reason, the amount of the overdraft
          shall be payable by the Fund to Custodian upon demand and shall bear
          an interest rate determined by Custodian from the date advanced until
          the date of payment.  Custodian shall have a lien on the assets of the
          Fund in the amount of any outstanding overdraft.

                                       19
<PAGE>
 
4.   INSTRUCTIONS.
     -------------

     A.   The term "instructions", as used herein, means written or facsimile
          instructions or advice to Custodian from two designated
          representatives of Fund. Certified copies of resolutions of the Board
          of Directors of Fund naming two or more designated representatives to
          give instructions in the name and on behalf of Fund, may be received
          and accepted from time to time by Custodian as conclusive evidence of
          the authority of any two designated representatives to act for Fund
          and may be considered to be in full force and effect (and Custodian
          will be fully protected in acting in reliance thereon) until receipt
          by Custodian of notice to the contrary. Unless the resolution
          delegating authority to any person to give instructions specifically
          requires that the approval of anyone else will first have been
          obtained, Custodian will be under no obligation to inquire into the
          right of the person giving such instructions to do so. Notwithstanding
          any of the foregoing provisions of this Section 4. no authorizations
          or instructions received by Custodian from Fund, will be deemed to
          authorize or permit any director, trustee, officer, employee, or agent
          of Fund to withdraw any of the securities or similar investments of
          Fund upon the mere receipt of such authorization or instructions from
          such director, trustee, officer, employee or agent.

          Notwithstanding any other provision of this Agreement, Custodian, upon
          receipt (and acknowledgement if required at the discretion of
          Custodian) of the instructions of any two designated representatives
          of Fund, will undertake to deliver for Fund's account monies,
          (provided such monies are on hand or available) in connection with
          Fund's transactions and to wire transfer such monies to such broker,
          dealer, subcustodian, bank or other agent specified in such
          instructions.

     B.   If oral instructions are permitted pursuant to Section 4.A. hereunder,
          no later than the next business day immediately following such oral
          instruction the Fund will send Custodian written confirmation of such
          oral instruction.  At Custodian's sole 

                                       20
<PAGE>
 
          discretion, Custodian may record on tape, or otherwise, any oral
          instruction whether given in person or via telephone, each such
          recording identifying the parties, the date and the time of the
          beginning and ending of such oral instruction.

5.   LIMITATION OF LIABILITY OF CUSTODIAN.
     -------------------------------------

     A.   Custodian shall hold harmless and indemnify Fund from and against any
          loss or liability arising out of Custodian's failure to comply with
          the terms of this Agreement or arising out of Custodian's negligence
          or bad faith.  Custodian may request and obtain the advice and opinion
          of counsel for Fund, or of its own counsel with respect to questions
          or matters of law, and it shall be without liability to Fund for any
          action taken or omitted by it in good faith, in conformity with such
          advice or opinion.  If Custodian reasonably believes that it could not
          prudently act according to the instructions of the Fund or the Fund's
          counsel, it may in its discretion, with notice to the Fund, not act
          according to such instructions.

     B.   Custodian may rely upon the advice of Fund and upon statements of
          Fund's public accountants and other persons believed by it in good
          faith, to be expert in matters upon which they are consulted, and
          Custodian shall not be liable for any actions taken, in good faith,
          upon such statements.

     C.   If Fund requires Custodian in any capacity to take, with respect to
          any securities, any action which involves the payment of money by it,
          or which in Custodian's opinion might make it or its nominee liable
          for payment of monies or in any other way, Custodian, upon notice to
          Fund given prior to such actions, shall be and be kept indemnified by
          Fund in an amount and form satisfactory to Custodian against any
          liability on account of such action.

     D.   Custodian shall be protected in acting as custodian hereunder upon any
          instructions, advice, notice, request, consent, certificate or other
          instrument or paper reasonably appearing to it to be genuine and to
          have been properly executed and shall, unless otherwise specifically
          provided herein, be entitled to receive as 

                                       21
<PAGE>
 
          conclusive proof of any fact or matter required to be ascertained from
          Fund hereunder, a certificate signed by the Fund's President, or other
          officer specifically authorized for such purpose.

     E.   Without limiting the generality of the foregoing, Custodian shall be
          under no duty or obligation to inquire into, and shall not be liable
          for:

          1.   The validity of the issue of any securities purchased by or for
               Fund, the legality of the purchase thereof or evidence of
               ownership required by Fund to be received by Custodian, or the
               propriety of the decision to purchase or amount paid therefor;

          2.   The legality of the sale of any securities by or for Fund, or the
               propriety of the amount for which the same are sold;

          3.   The legality of the issue or sale of any shares of the Capital
               Stock of Fund, or the sufficiency of the amount to be received
               therefor;

          4.   The legality of the repurchase or redemption of any Fund Shares,
               or the propriety of the amount to be paid therefor; or

          5.   The legality of the declaration of any dividend by Fund, or the
               legality of the issue of any Fund Shares in payment of any stock
               dividend.

     F.   Custodian shall not be liable for, or considered to be Custodian of,
          any money represented by any check, draft, wire transfer, clearing
          house funds, uncollected funds, or instrument for the payment of money
          received by it on behalf of Fund, until Custodian actually receives
          such money, provided only that it shall advise Fund promptly if it
          fails to receive any such money in the ordinary course of business,
          and use its best efforts and cooperate with Fund toward the end that
          such money shall be received.

     G.   Custodian shall not be responsible for loss occasioned by the acts,
          neglects, defaults or insolvency of any broker, bank, trust company,
          or any other person with whom Custodian may deal in the absence of
          negligence, or bad faith on the part of Custodian, except as provided
          in Section 3.S.1 hereof.

                                       22
<PAGE>
 
     H.   Notwithstanding anything herein to the contrary, Custodian may, and
          with respect to any foreign subcustodian appointed under Section
          3.S.2. must, provide Fund for its approval, agreements with banks or
          trust companies which will act as subcustodians for Fund pursuant to
          Section 3.S of this Agreement.

6.   COMPENSATION.  Fund will pay to Custodian such compensation as is stated in
     ------------                                                               
     the Fee Schedule attached hereto as Exhibit B which may be changed from
     time to time as agreed to in writing by Custodian and Fund.  Custodian may
     charge such compensation against monies held by it for the account of Fund.
     Custodian will also be entitled, notwithstanding the provisions of Sections
     5.C. or 5.D. hereof, to charge against any monies held by it for the
     account of Fund the amount of any loss, damage, liability, advance, or
     expense for which it shall be entitled to reimbursement under the
     provisions of this Agreement including fees or expenses due to Custodian
     for other services provided to the Fund by the Custodian.  Custodian will
     not be entitled to reimbursement by Fund for any loss or expenses of any
     subcustodian.

7.   TERMINATION.  Either party to this Agreement may terminate the same by
     -----------                                                           
     notice in writing, delivered or mailed, postage prepaid, to the other party
     hereto and received not less than ninety (90) days prior to the date upon
     which such termination will take effect.  If the Custodian terminates this
     Agreement, the Fund may extend the effective date of the termination ninety
     (90) days by written request to the Custodian thirty (30) days prior to the
     end of the initial ninety (90) days notice period unless the Custodian in
     good faith could not perform the duties hereunder.  Upon termination of
     this Agreement, Fund will pay to Custodian such compensation for its
     reimbursable disbursements, costs and expenses paid or incurred to such
     date and Fund will use its best efforts to obtain a successor custodian.
     Unless the holders of a majority of the outstanding shares of "Capital
     Stock" of Fund vote to have the securities, funds and other properties held
     under this Agreement delivered and paid over to some other person, firm or
     corporation specified in the vote, having not less the Two Million Dollars
     ($2,000,000) aggregate capital, surplus and undivided profits, as shown by
     its last published report, and meeting 

                                       23
<PAGE>
 
     such other qualifications for custodian as set forth in the Bylaws of Fund,
     the Board of Directors of Fund will, forthwith upon giving or receiving
     notice of termination of this Agreement, appoint as successor custodian a
     bank or trust company having such qualifications. Custodian will, upon
     termination of this Agreement, deliver to the successor custodian so
     specified or appointed, at Custodian's office, all securities then held by
     Custodian hereunder, duly endorsed and in form for transfer, all funds and
     other properties of Fund deposited with or held by Custodian hereunder, or
     will co-operate in effecting changes in book-entries at the Depository
     Trust Company or in the Treasury/Federal Reserve Book-Entry System pursuant
     to 31 CFR Sec. 306.118. In the event no such vote has been adopted by the
     stockholders of Fund and no written order designating a successor custodian
     has been delivered to Custodian on or before the date when such termination
     becomes effective, then Custodian will deliver the securities, funds and
     properties of Fund to a bank or trust company at the selection of Custodian
     and meeting the qualifications for custodian, if any, set forth in the
     Bylaws of Fund and having not less that Two Million Dollars ($2,000,000)
     aggregate capital, surplus and undivided profits, as shown by its last
     published report. Upon either such delivery to a successor custodian,
     Custodian will have no further obligations or liabilities under this
     Agreement. Thereafter such bank or trust company will be the successor
     custodian under this Agreement and will be entitled to reasonable
     compensation for its services. In the event that no such successor
     custodian can be found, Fund will submit to its shareholders, before
     permitting delivery of the cash and securities owned by Fund to anyone
     other than a successor custodian, the question of whether Fund will be
     liquidated or function without a custodian. Notwithstanding the foregoing
     requirement as to delivery upon termination of this Agreement, Custodian
     may make any other delivery of the securities, funds and property of Fund
     which is permitted by the Investment Company Act of 1940, Fund's
     Certificate of Incorporation and Bylaws then in effect or apply to a court
     of competent jurisdiction for the appointment of a successor custodian.

                                       24
<PAGE>
 
8.   NOTICES.  Notices, requests, instructions and other writings received by
     -------                                                                 
     Fund at One Bankers Trust Plaza, New York, New York  10006 such other
     address as Fund may have designated to Custodian in writing, will be deemed
     to have been properly given to Fund hereunder; and notices, requests,
     instructions and other writings received by Custodian at its offices at 127
     West 10th Street, Kansas City, Missouri 64105, or to such other address as
     it may have designated to Fund in writing, will be deemed to have been
     properly given to Custodian hereunder.

9.   MISCELLANEOUS.
     ------------- 
     A.   This Agreement is executed and delivered in the State of Missouri and
          shall be governed by the laws of said state.

     B.   All the terms and provisions of this Agreement shall be binding upon,
          inure to the benefit of, and be enforceable by the respective
          successor and assigns of the parties hereto.

     C.   No provisions of the Agreement may be amended or modified, in any
          manner except by a written agreement properly authorized and executed
          by both parties hereto.

     D.   The captions in this Agreement are included for convenience of
          reference only, and in no way define or delimit any of the provisions
          hereof or otherwise affect their construction or effect.

     E.   This  Agreement shall  become effective  at the  close of  business on
          the _____________________ day of ______, 19__.

     F.   This Agreement may be executed simultaneously in two or more
          counterparts, each of which will be deemed an original but all of
          which together will constitute one and the same instrument.

     G.   If any part, term or provision of this Agreement is by the courts held
          to be illegal, in conflict with any law or otherwise invalid, the
          remaining portion or portions shall be considered severable and not be
          affected, and the rights and obligations of 

                                       25
<PAGE>
 
          the parties shall be construed and enforced as if the Agreement did
          not contain the particular part, term or provision held to be illegal
          or invalid.

     H.   Custodian will not release the identity of Fund to an issuer which
          requests such information pursuant to the Shareholder Communications
          Act of 1985 for the specific purpose of direct communications between
          such issuer and Fund unless the Fund directs the Custodian otherwise.

     I.   This Agreement may not be assigned by either party without prior
          written consent of the other party.

     J.   If any provision of the Agreement, either in its present form or as
          amended from time to time, limits, qualifies, or conflicts with the
          Investment Company Act of 1940 and the rules and regulations
          promulgated thereunder, such statutes, rules and regulations shall be
          deemed to control and supersede such provision without nullifying or
          terminating the remainder of the provisions of this Agreement.

                                       26
<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly respective authorized officers.


                         INVESTORS FIDUCIARY TRUST COMPANY


                         By:_______________________________
                            Gerard P. Dipoto, Jr.
                            Senior Vice President

ATTEST:


- -----------------------------------
Cheryl J. Naegler
Assistant Secretary



                         SELIGMAN COMMON STOCK FUND, INC.


                         By:_______________________________________

                         Title:____________________________________


ATTEST:


- ---------------------------------
Secretary

                                       27

<PAGE>
 
                                                                EXHIBIT 99.(B)10

                              SULLIVAN & CROMWELL
                               125 Broad Street
                           New York, New York 10004


Seligman Common Stock Fund, Inc.
One Bankers Trust Plaza
New York, New York 10006

Dear Sirs:

        You have requested our opinion in connection with Post-Effective
Amendment No. 58 to your Registration Statement on Form N-1A (File No. 2-10835)
which you expect to file under the Securities Act of 1933 with respect to shares
of your capital stock, $.50 par value.

        As your counsel, we are familiar with your organization and corporate 
status and the legality of your capital stock.  We are also familiar with the 
Distributing Agreement between you and J. & W. Seligman & Co. Marketing, Inc.

        We advise you that, in our opinion, shares of the capital stock of 
Seligman Common Stock Fund, Inc., when issued for at least the par value thereof
in accordance with such Distributing Agreement and as authorized by the Board of
Directors, will be legally and validly issued, fully paid and nonassessable.

        We  consent to the filing of this opinion with the Securities and 
Exchange Commission as an exhibit to the Post-Effective Amendment referred to 
above. In giving such consent, we do not thereby admit that we come within the 
category of persons whose consent is required under Section 7 of the Securities 
Act of 1933.

                                                Very truly yours,



                                                Sullivan & Cromwell



<PAGE>
 
                                                                EXHIBIT 99.(B)11

Consent of Independent Auditors


Seligman Common Stock Fund, Inc.:

We consent to the use in Post-Effective Amendment No. 75 to Registration 
Statement No.2-10835 of our report dated January 31, 1997, appearing in the 
Annual Report to Shareholders for the year ended December 31, 1996 incorporated 
by reference in the Statement of Additional Information, and to the reference to
us under the caption "Financial Highlights" in the Prospectus, which is also 
part of such Registration Statement.



DELOITTE & TOUCHE LLP
New York, New York
April 25, 1997

<PAGE>
 
                                                                      EXHIBIT 13

                               INVESTMENT LETTER

                       SELIGMAN COMMON STOCK FUND, INC.


Seligman Common Stock Fund, Inc. (the "Fund"), an open-end diversified
management investment company, and the undersigned ("Purchaser"), intending to
be legally bound, hereby agree as follows:

1.   The Fund hereby sells to Purchaser and Purchaser purchases 1 Class B share
     (the "Share") of Capital Stock (par value $.50) of the Fund at a price
     equivalent to the net asset value of one share of the Fund as of the close
     of business on April 19, 1996.  The Fund hereby acknowledges receipt from
     Purchaser of funds in such amount in full payment for the Share.

2.   Purchaser represents and warrants to the Fund that the Shares are being
     acquired for investment and not with a view to distribution thereof, and
     that Purchaser has no present intention to redeem or dispose of the Share.


IN WITNESS WHEREOF, the parties have executed this agreement as of the 19th day
of April, 1996 ("Purchase Date").


                           SELIGMAN COMMON STOCK FUND, INC.



                           By:
                              -------------------------------  
                           Name:  Lawrence P. Vogel
                           Title: Vice President


                           J. & W. SELIGMAN & CO. INCORPORATED



                           By:
                              -------------------------------  
                           Name:  Lawrence P. Vogel
                           Title: Senior Vice President

<PAGE>
 
                                                                   EXHIBIT 13(a)

                               INVESTMENT LETTER

                        SELIGMAN COMMON STOCK FUND, INC.



Seligman Common Stock Fund, Inc. (the "Fund"), an open-end diversified
management investment company, and the undersigned ("Purchaser"), intending to
be legally bound, hereby agree as follows:

1.   The Fund hereby sells to Purchaser and Purchaser purchases 1 Class D share
     (the "Share") of Capital Stock (par value $.50) of the Fund at a price
     equivalent to the net asset value of one share of the Fund as of the close
     of business on April 30, 1993.  The Fund hereby acknowledges receipt from
     Purchaser of funds in such amount in full payment for the Share.

2.   Purchaser represents and warrants to the Fund that the Share is being
     acquired for investment and not with a view to distribution thereof, and
     that Purchaser has no present intention to redeem or dispose of the Share.

IN WITNESS WHEREOF, the parties have executed this agreement as of the   day of
     , 1993 ("Purchase Date").

                              SELIGMAN COMMON STOCK FUND, INC.


                              By:
                                  ------------------------------------
                              Name:
                              Title:

                              J. & W. SELIGMAN & CO. INCORPORATED


                              By:
                                  ------------------------------------
                              Name:
                              Title:

<PAGE>
 
                                                                      EXHIBIT 16
<TABLE>
<CAPTION>
SELIGMAN COMMON STOCK FUND - CLASS A
AVERAGE ANNUAL TOTAL RETURN OF AN ASSUMED INVESTMENT OF                $1,000.00
RETURN COMPUTATION FOR THE            10.00 YEAR PERIOD ENDED          31-Dec-96
LOAD RATE EQUALS           4.75%    MAXIMUM OFFERING PRICE EQUALS         $13.68

             DVD PER                # OF    SHARES     CUMUL
    DATE     SHARE    D/G  NAV      YRS    ACQUIRED   SHARES  VALUE
- -----------  -------- ---  -----   -----   --------  -------  --------
<S>          <C>      <C>  <C>     <C>     <C>       <C>      <C>     
  31-Dec-86                13.03           73.099    73.099    $952.48
  31-Jan-87  0.000000      14.72   0.085    0.000    73.099   1,076.02
  28-Feb-87  0.000000      15.25   0.162    0.000    73.099   1,114.76
  20-Mar-87  0.110000 D    15.67   0.216    0.513    73.612   1,153.50
  31-Mar-87                15.35   0.247    0.000    73.612   1,129.94
  30-Apr-87  0.000000      14.97   0.329    0.000    73.612   1,101.97
  31-May-87  0.000000      14.94   0.414    0.000    73.612   1,099.76
  19-Jun-87  0.110000 D    15.61   0.466    0.519    74.131   1,157.18
  30-Jun-87                15.46   0.496    0.000    74.131   1,146.07
  31-Jul-87  0.000000      15.94   0.581    0.000    74.131   1,181.65
  31-Aug-87  0.000000      16.53   0.666    0.000    74.131   1,225.39
  18-Sep-87  0.110000 D    15.71   0.715    0.519    74.650   1,172.75
  30-Sep-87                15.97   0.748    0.000    74.650   1,192.16
  31-Oct-87  0.000000      12.69   0.833    0.000    74.650     947.31
  30-Nov-87  0.000000      11.85   0.915    0.000    74.650     884.60
  22-Dec-87  0.120000 D    11.02   0.975    0.813    75.463     831.60
  22-Dec-87  1.600000 G    11.02   0.975   10.838    86.301     951.04
  31-Dec-87                11.06   1.000    0.000    86.301     954.49
  31-Jan-88  0.000000      11.43   1.085    0.000    86.301     986.42
  29-Feb-88  0.000000      11.96   1.164    0.000    86.301   1,032.16
  18-Mar-88  0.100000 D    12.06   1.214    0.716    87.017   1,049.43
  31-Mar-88                11.52   1.249    0.000    87.017   1,002.44
  30-Apr-88  0.000000      11.60   1.332    0.000    87.017   1,009.40
  31-May-88  0.000000      11.61   1.416    0.000    87.017   1,010.27
  24-Jun-88  0.100000 D    12.04   1.482    0.723    87.740   1,056.39
  30-Jun-88                12.02   1.499    0.000    87.740   1,054.63
  31-Jul-88  0.000000      11.90   1.584    0.000    87.740   1,044.11
  31-Aug-88  0.000000      11.47   1.668    0.000    87.740   1,006.38
  23-Sep-88  0.100000 D    11.69   1.732    0.751    88.491   1,034.46
  30-Sep-88                11.80   1.751    0.000    88.491   1,044.19
  31-Oct-88  0.000000      11.89   1.836    0.000    88.491   1,052.16
  30-Nov-88  0.000000      11.67   1.918    0.000    88.491   1,032.69
  23-Dec-88  0.120000 D    11.23   1.981    0.946    89.437   1,004.38
  23-Dec-88  0.450000 G    11.23   1.981    3.546    92.983   1,044.20
  31-Dec-88                11.30   2.003    0.000    92.983   1,050.71
  31-Jan-89  0.000000      11.96   2.088    0.000    92.983   1,112.08
  28-Feb-89  0.000000      11.68   2.164    0.000    92.983   1,086.04
  24-Mar-89  0.100000 D    11.68   2.230    0.796    93.779   1,095.34
  31-Mar-89                11.85   2.249    0.000    93.779   1,111.28
  30-Apr-89  0.000000      12.30   2.332    0.000    93.779   1,153.48
  31-May-89  0.000000      12.75   2.416    0.000    93.779   1,195.68
  23-Jun-89  0.110000 D    12.63   2.479    0.817    94.596   1,194.75
  30-Jun-89                12.43   2.499    0.000    94.596   1,175.83
  31-Jul-89  0.000000      13.39   2.584    0.000    94.596   1,266.64
  31-Aug-89  0.000000      13.67   2.668    0.000    94.596   1,293.13
  22-Sep-89  0.110000 D    13.45   2.729    0.774    95.370   1,282.73
  30-Sep-89                13.54   2.751    0.000    95.370   1,291.31
  31-Oct-89  0.000000      13.25   2.836    0.000    95.370   1,263.65
  30-Nov-89  0.000000      13.56   2.918    0.000    95.370   1,293.22
  22-Dec-89  1.590000 G    12.05   2.978   12.584   107.954   1,300.85
  22-Dec-89  0.110000 D    12.05   2.978    0.871   108.825   1,311.34
  31-Dec-89                12.24   3.003    0.000   108.825   1,332.02
  31-Jan-90                11.54   3.088    0.000   108.825   1,255.84
  28-Feb-90                11.83   3.164    0.000   108.825   1,287.40
  23-Mar-90  0.100000 D    11.91   3.227    0.914   109.739   1,306.99
  31-Mar-90                12.02   3.249    0.000   109.739   1,319.06
  30-Apr-90                11.61   3.332    0.000   109.739   1,274.07
  31-May-90                12.81   3.416    0.000   109.739   1,405.76
  29-Jun-90  0.100000 D    12.67   3.496    0.866   110.605   1,401.37
  30-Jun-90                12.67   3.499    0.000   110.605   1,401.37
  31-Jul-90                12.50   3.584    0.000   110.605   1,382.56
  31-Aug-90                11.34   3.668    0.000   110.605   1,254.26
  21-Sep-90  0.000000      10.59   3.726    0.000   110.605   1,171.31
  28-Sep-90  0.100000 D    10.36   3.745    1.068   111.673   1,156.93
  30-Sep-90                10.36   3.751    0.000   111.673   1,156.93
  31-Oct-90                10.29   3.836    0.000   111.673   1,149.12
  30-Nov-90                11.01   3.918    0.000   111.673   1,229.52
  28-Dec-90  0.750000 G    10.55   3.995    7.939   119.612   1,261.91
  28-Dec-90  0.110000 D    10.55   3.995    1.164   120.776   1,274.19
  31-Dec-90                10.60   4.003    0.000   120.776   1,280.23
  31-Jan-91                11.28   4.088    0.000   120.776   1,362.35
  28-Feb-91                12.11   4.164    0.000   120.776   1,462.60
  28-Mar-91  0.080000 D    12.26   4.241    0.788   121.564   1,490.37
  31-Mar-91                12.26   4.249    0.000   121.564   1,490.37
  30-Apr-91                12.28   4.332    0.000   121.564   1,492.81
  31-May-91                12.78   4.416    0.000   121.564   1,553.59
  27-Jun-91  0.100000 D    12.00   4.490    1.013   122.577   1,470.92
  30-Jun-91                11.91   4.499    0.000   122.577   1,459.89
  31-Jul-91                12.47   4.584    0.000   122.577   1,528.54
  31-Aug-91                12.92   4.668    0.000   122.577   1,583.69
  26-Sep-91  0.100000 D    12.70   4.740    0.965   123.542   1,568.98
  30-Sep-91                12.73   4.751    0.000   123.542   1,572.69
  31-Oct-91                13.02   4.836    0.000   123.542   1,608.52
  30-Nov-91                12.47   4.918    0.000   123.542   1,540.57
  26-Dec-91  0.780000 G    12.21   4.989    7.892   131.434   1,604.81
  26-Dec-91  0.120000 D    12.21   4.989    1.214   132.648   1,619.63
  31-Dec-91                12.54   5.003    0.000   132.648   1,663.41
  31-Jan-92                12.78   5.088    0.000   132.648   1,695.24
  29-Feb-92                13.17   5.167    0.000   132.648   1,746.97
  27-Mar-92  0.090000 D    12.71   5.241    0.939   133.587   1,697.89
  31-Mar-92                12.66   5.252    0.000   133.587   1,691.21
  02-Apr-92  0.000000      13.15   5.258    0.000   133.587   1,756.67
  30-Apr-92  0.000000      12.97   5.334    0.000   133.587   1,732.62
  31-May-92  0.000000      13.16   5.419    0.000   133.587   1,758.00
  26-Jun-92  0.100000 D    12.52   5.490    1.067   134.654   1,685.87
  30-Jun-92                12.64   5.501    0.000   134.654   1,702.03
  31-Jul-92  0.000000      13.01   5.586    0.000   134.654   1,751.85
  31-Aug-92  0.000000      12.82   5.671    0.000   134.654   1,726.26
  21-Sep-92  0.000000      13.00   5.729    0.000   134.654   1,750.50
  24-Sep-92  0.100000 D    12.88   5.737    1.045   135.699   1,747.80
  30-Sep-92                12.89   5.753    0.000   135.699   1,749.16
  31-Oct-92  0.000000      13.14   5.838    0.000   135.699   1,783.08
  30-Nov-92  0.000000      13.52   5.921    0.000   135.699   1,834.65
  28-Dec-92  0.700000 G    12.80   5.997    7.421   143.120   1,831.94
  28-Dec-92  0.100000 D    12.80   5.997    1.060   144.180   1,845.50
  31-Dec-92                12.79   6.005    0.000   144.180   1,844.06
  31-Jan-93                12.91   6.090    0.000   144.180   1,861.36
  28-Feb-93  0.000000      13.04   6.167    0.000   144.180   1,880.11
  26-Mar-93  0.080000 D    13.23   6.238    0.872   145.052   1,919.04
  31-Mar-93                13.33   6.252    0.000   145.052   1,933.54
  30-Apr-93  0.000000      13.22   6.334    0.000   145.052   1,917.59
  31-May-93  0.000000      13.55   6.419    0.000   145.052   1,965.45
  25-Jun-93  0.090000 D    13.44   6.488    0.971   146.023   1,962.55
  30-Jun-93                13.56   6.501    0.000   146.023   1,980.07
  31-Jul-93  0.000000      13.50   6.586    0.000   146.023   1,971.31
  31-Aug-93  0.000000      13.98   6.671    0.000   146.023   2,041.40
  23-Sep-93  0.100000 D    13.70   6.734    1.066   147.089   2,015.12
  30-Sep-93  0.000000      13.80   6.753    0.000   147.089   2,029.83
  15-Oct-93  0.000000      14.12   6.795    0.000   147.089   2,076.90
  31-Oct-93  0.000000      14.05   6.838    0.000   147.089   2,066.60
  30-Nov-93  0.000000      14.01   6.921    0.000   147.089   2,060.72
  28-Dec-93  0.820000 G    13.48   6.997    8.948   156.037   2,103.38
  28-Dec-93  0.110000 D    13.48   6.997    1.200   157.237   2,119.55
  31-Dec-93  0.000000      13.47   7.005    0.000   157.237   2,117.98
  31-Jan-94  0.000000      13.79   7.090    0.000   157.237   2,168.30
  28-Feb-94  0.000000      13.44   7.167    0.000   157.237   2,113.27
  25-Mar-94  0.080000 D    13.17   7.236    0.955   158.192   2,083.39
  31-Mar-94  0.000000      12.76   7.252    0.000   158.192   2,018.53
  30-Apr-94                12.95   7.334    0.000   158.192   2,048.59
  31-May-94  0.000000      13.14   7.419    0.000   158.192   2,078.64
  17-Jun-94  0.090000 D    13.10   7.466    1.087   159.279   2,086.55
  30-Jun-94  0.000000      12.74   7.501    0.000   159.279   2,029.21
  31-Jul-94  0.000000      13.17   7.586    0.000   159.279   2,097.70
  31-Aug-94  0.000000      13.60   7.671    0.000   159.279   2,166.19
  23-Sep-94  0.100000 D    13.04   7.734    1.221   160.500   2,092.92
  30-Sep-94  0.000000      13.14   7.753    0.000   160.500   2,108.97
  31-Oct-94  0.000000      13.35   7.838    0.000   160.500   2,142.68
  30-Nov-94                12.79   7.921    0.000   160.500   2,052.80
  14-Dec-94  0.720000 G    12.02   7.959    9.614   170.114   2,044.77
  14-Dec-94  0.100000 D    12.02   7.959    1.335   171.449   2,060.82
  31-Dec-94  0.000000      12.12   8.005    0.000   171.449   2,077.96
  31-Jan-95  0.000000      12.29   8.090    0.000   171.449   2,107.11
  28-Feb-95  0.000000      12.78   8.167    0.000   171.449   2,191.12
  17-Mar-95  0.080000 D    12.86   8.214    1.067   172.516   2,218.56
  31-Mar-95  0.000000      13.07   8.252    0.000   172.516   2,254.78
  30-Apr-95                13.35   8.334    0.000   172.516   2,303.09
  31-May-95  0.000000      13.88   8.419    0.000   172.516   2,394.52
  16-Jun-95  0.090000 D    13.89   8.463    1.118   173.634   2,411.78
  30-Jun-95  0.000000      13.93   8.501    0.000   173.634   2,418.72
  31-Jul-95                14.33   8.586    0.000   173.634   2,488.18
  31-Aug-95                14.33   8.671    0.000   173.634   2,488.18
  22-Sep-95  0.090000 D    14.65   8.732    1.067   174.701   2,559.37
  30-Sep-95  0.000000      14.72   8.753    0.000   174.701   2,571.60
  31-Oct-95                14.35   8.838    0.000   174.701   2,506.96
  30-Nov-95                14.99   8.921    0.000   174.701   2,618.77
  22-Dec-95  0.944000 G    14.04   8.981   11.746   186.447   2,617.72
  22-Dec-95  0.100000 D    14.04   8.981    1.244   187.691   2,635.18
  31-Dec-95  0.000000      14.19   9.005    0.000   187.691   2,663.34
  31-Jan-96                14.52   9.090    0.000   187.691   2,725.27
  29-Feb-96                14.68   9.170    0.000   187.691   2,755.30
  22-Mar-96  0.080000 D    14.89   9.230    1.008   188.699   2,809.73
  31-Mar-96  0.000000      14.83   9.255    0.000   188.699   2,798.41
  30-Apr-96                14.94   9.337    0.000   188.699   2,819.16
  31-May-96                15.20   9.422    0.000   188.699   2,868.22
  21-Jun-96  0.090000 D    14.86   9.479    1.143   189.842   2,821.05
  21-Jun-96  0.292000 G    14.86   9.479    3.708   193.550   2,876.15
  30-Jun-96  0.000000      14.97   9.504    0.000   193.550   2,897.44
  16-Jul-96  0.000000      14.19   9.548    0.000   193.550   2,746.47
  31-Jul-96  0.000000      14.27   9.589    0.000   193.550   2,761.96
  06-Aug-96  0.000000      14.64   9.605    0.000   193.550   2,833.57
  27-Aug-96  0.000000      14.73   9.663    0.000   193.550   2,850.99
  31-Aug-96  0.000000      14.50   9.674    0.000   193.550   2,806.48
  20-Sep-96  0.090000 D    14.89   9.729    1.170   194.720   2,899.38
  30-Sep-96  0.000000      15.00   9.756    0.000   194.720   2,920.80
  31-Oct-96  0.000000      15.41   9.841    0.000   194.720   3,000.64
  15-Nov-96  0.823000 G    15.05   9.882   10.648   205.368   3,090.79
  30-Nov-96  0.000000      15.28   9.923    0.000   205.368   3,138.02
  18-Dec-96  0.080000 D    14.75   9.973    1.114   206.482   3,045.61
  31-Dec-96                14.89  10.008    0.000   206.482   3,074.52
</TABLE> 
                               CALCULATION OF
                               AVERAGE ANNUAL TOTAL RETURN
                               P*(1+T) N = ERV

                               P = INITIAL PAYMENT -              $1,000.00
                               T = AVG. ANNUAL TOTAL RETURN -        11.89%
                               N = NUMBER OF YEARS -                     10
                               ERV = ENDING REDEEMABLE VALUE      $3,074.52

                               TOTAL RETURN FOR PERIOD              207.45%

<PAGE>
 
<TABLE> 
<CAPTION> 
SELIGMAN COMMON STOCK FUND, INC. - CLASS B
AVERAGE ANNUAL TOTAL RETURN OF AN ASSUMED INVESTMENT OF                $1,000.00
                                    0.69 YEAR PERIOD ENDED             31-Dec-96
LOAD RATE EQUALS            0.00%  MAXIMUM OFFERING PRICE -             $14.8000

             DVD PER                  # OF   SHARES       CUMUL
    DATE     SHARE    D/G      NAV    YRS   ACQUIRED     SHARES     VALUE
  ---------  -------- ---    -------  ----- --------     --------  ---------
<S>          <C>      <C>  <C>        <C>   <C>          <C>       <C>  
  22-Apr-96  0.000000        14.8000          67.568       67.568  $1,000.00
  30-Apr-96  0.000000        14.8900  0.022    0.000       67.568   1,006.09
  31-May-96  0.000000        15.1400  0.107    0.000       67.568   1,022.98
  21-Jun-96  0.058000 D      14.8200  0.164    0.264       67.832   1,005.27
  21-Jun-96  0.292000 G      14.8200  0.164    1.331       69.163   1,025.00
  30-Jun-96  0.000000        14.9300  0.189    0.000       69.163   1,032.60
  31-Jul-96  0.000000        14.2200  0.274    0.000       69.163     983.50
  31-Aug-96  0.000000        14.4500  0.359    0.000       69.163     999.41
  20-Sep-96  0.058000        14.8600  0.414    0.270       69.433   1,031.77
  30-Sep-96  0.000000        14.9700  0.441    0.000       69.433   1,039.41
  31-Oct-96  0.000000        15.3700  0.526    0.000       69.433   1,067.19
  15-Nov-96  0.823000 G      15.0000  0.567    3.810       73.243   1,098.65
  30-Nov-96  0.000000        15.2300  0.608    0.000       73.243   1,115.49
  18-Dec-96  0.040000 D      14.7400  0.658    0.199       73.442   1,082.54
  31-Dec-96                  14.8700  0.693    0.000       73.442   1,092.08
                           LESS CDSL                                   50.00
                                                                   ---------
                                                                    1,042.08
                                                                   =========
</TABLE> 
                         CALCULATION OF
                         AVERAGE ANNUAL TOTAL RETURN
                         P*(1+T) N = ERV

                         P = INITIAL PAYMENT -                     $1,000.00
                         T = AVG. ANNUAL TOTAL RETURN -                  N/A
                         N = NUMBER OF YEARS -                         0.693
                         ERV=ENDING REDEEMABLE VALUE               $1,042.08
                                                              
                         TOTAL RETURN (LESS CDSL)                      4.21%

<PAGE>
 
<TABLE>
<CAPTION>
SELIGMAN COMMON STOCK FUND, INC. - CLASS D
AVERAGE ANNUAL TOTAL RETURN OF AN ASSUMED INVESTMENT OF             $1,000.00
RETURN COMPUTATION FOR THE             3.67 YEAR PERIOD ENDED       31-Dec-96
LOAD RATE EQUALS              0.00%  MAXIMUM OFFERING PRICE EQUALS    $13.290

              DVD PER               # OF     SHARES   CUMUL
     DATE     SHARE    D/G   NAV      YRS   ACQUIRED  SHARES      VALUE
   ---------  -------- ---   -----  ------  --------  ------   ----------
<S>           <C>      <C>   <C>    <C>     <C>       <C>      <C>
   03-May-93  0.000000       13.29           75.245     75.245  $1,000.00
   31-May-93  0.000000       13.54   0.077    0.000     75.245   1,018.82
   25-Jun-93  0.070000 D     13.44   0.145    0.392     75.637   1,016.56
   30-Jun-93                 13.56   0.159    0.000     75.637   1,025.64
   31-Jul-93  0.000000       13.49   0.244    0.000     75.637   1,020.34
   31-Aug-93  0.000000       13.96   0.329    0.000     75.637   1,055.89
   23-Sep-93  0.070000 D     13.69   0.392    0.387     76.024   1,040.77
   30-Sep-93                 13.79   0.411    0.000     76.024   1,048.37
   31-Oct-93  0.000000       14.03   0.496    0.000     76.024   1,066.62
   30-Nov-93  0.000000       13.98   0.578    0.000     76.024   1,062.82
   28-Dec-93  0.820000 g     13.48   0.655    4.625     80.649   1,087.15
   28-Dec-93  0.070000 d     13.48   0.655    0.395     81.044   1,092.47
   31-Dec-93  0.000000       13.46   0.663    0.000     81.044   1,090.85
   31-Jan-94  0.000000       13.76   0.748    0.000     81.044   1,115.17
   28-Feb-94  0.000000       13.39   0.825    0.000     81.044   1,085.18
   25-Mar-94  0.040000 D     13.15   0.893    0.247     81.291   1,068.98
   25-Mar-94  0.000000       13.15   0.893    0.000     81.291   1,068.98
   31-Mar-94  0.000000       12.73   0.910    0.000     81.291   1,034.83
   30-Apr-94  0.000000       12.90   0.992    0.000     81.291   1,048.65
   31-May-94  0.000000       13.07   1.077    0.000     81.291   1,062.47
   17-Jun-94  0.040000 D     13.08   1.123    0.249     81.540   1,066.54
   30-Jun-94  0.000000       12.72   1.159    0.000     81.540   1,037.19
   31-Jul-94  0.000000       13.13   1.244    0.000     81.540   1,070.62
   31-Aug-94  0.000000       13.54   1.329    0.000     81.540   1,104.05
   23-Sep-94  0.070000 D     13.01   1.392    0.439     81.979   1,066.55
   30-Sep-94  0.000000       13.11   1.411    0.000     81.979   1,074.74
   31-Oct-94  0.000000       13.31   1.496    0.000     81.979   1,091.14
   30-Nov-94  0.000000       12.74   1.578    0.000     81.979   1,044.41
   14-Dec-94  0.720000 G     11.99   1.616    4.923     86.902   1,041.95
   14-Dec-94  0.080000 D     11.99   1.616    0.547     87.449   1,048.51
   15-Dec-94  0.000000       12.03   1.619    0.000     87.449   1,052.01
   31-Dec-94  0.000000       12.07   1.663    0.000     87.449   1,055.51
   31-Jan-95  0.000000       12.23   1.748    0.000     87.449   1,069.50
   28-Feb-95  0.000000       12.71   1.825    0.000     87.449   1,111.48
   17-Mar-95  0.047000 d     12.82   1.871    0.321     87.770   1,125.21
   31-Mar-95  0.000000       13.02   1.910    0.000     87.770   1,142.77
   30-Apr-95  0.000000       13.30   1.992    0.000     87.770   1,167.34
   31-May-95  0.000000       13.81   2.077    0.000     87.770   1,212.10
   16-Jun-95  0.057000 D     13.85   2.121    0.361     88.131   1,220.61
   19-Jun-95                 13.95   2.129    0.000     88.131   1,229.43
   30-Jun-95  0.000000       13.89   2.159    0.000     88.131   1,224.14
   31-Jul-95  0.000000       14.28   2.244    0.000     88.131   1,258.51
   31-Aug-95  0.000000       14.27   2.329    0.000     88.131   1,257.63
   22-Sep-95  0.057000 D     14.61   2.389    0.344     88.475   1,292.62
   22-Sep-95  0.000000       14.61   2.389    0.000     88.475   1,292.62
   30-Sep-95  0.000000       14.68   2.411    0.000     88.475   1,298.81
   31-Oct-95  0.000000       14.30   2.496    0.000     88.475   1,265.19
   30-Nov-95  0.000000       14.92   2.578    0.000     88.475   1,320.05
   22-Dec-95  0.057000 d     14.01   2.638    0.360     88.835   1,244.58
   22-Dec-95  0.944000 g     14.01   2.638    5.961     94.796   1,328.09
   31-Dec-95  0.000000       14.16   2.663    0.000     94.796   1,342.31
   31-Jan-96  0.000000       14.48   2.748    0.000     94.796   1,372.65
   29-Feb-96  0.000000       14.63   2.827    0.000     94.796   1,386.87
   22-Mar-96  0.000000       14.86   2.888    0.000     94.796   1,408.67
   22-Mar-96  0.057000 d     14.86   2.888    0.364     95.160   1,414.08
   27-Mar-96  0.000000       14.83   2.901    0.000     95.160   1,411.22
   31-Mar-96  0.000000       14.80   2.912    0.000     95.160   1,408.37
   30-Apr-96  0.000000       14.89   2.995    0.000     95.160   1,416.93
   31-May-96  0.000000       15.14   3.079    0.000     95.160   1,440.72
   21-Jun-96  0.058000 d     14.82   3.137    0.372     95.532   1,415.78
   21-Jun-96  0.292000 cg    14.82   3.137    1.875     97.407   1,443.57
   21-Jun-96  0.000000       14.82   3.137    0.000     97.407   1,443.57
   30-Jun-96  0.000000       14.93   3.162    0.000     97.407   1,454.29
   31-Jul-96                 14.22   3.247    0.000     97.407   1,385.13
   31-Aug-96                 14.45   3.332    0.000     97.407   1,407.53
   20-Sep-96  0.058000 D     14.86   3.386    0.380     97.787   1,453.11
   30-Sep-96  0.000000       14.97   3.414    0.000     97.787   1,463.87
   31-Oct-96  0.000000       15.37   3.499    0.000     97.787   1,502.99
   15-Nov-96  0.823000 G     15.00   3.540    5.365    103.152   1,547.28
   30-Nov-96  0.000000       15.23   3.581    0.000    103.152   1,571.00
   18-Dec-96  0.040000 D     14.74   3.630    0.280    103.432   1,524.59
   31-Dec-96                 14.87   3.666    0.000    103.432   1,538.03
</TABLE> 
                                CALCULATION OF
                                AVERAGE ANNUAL TOTAL RETURN
                                P*(1+T) N = ERV

                                P = INITIAL PAYMENT -           $1,000.00
                                T = AVG. ANNUAL TOTAL RETURN -     12.46%
                                N = NUMBER OF YEARS -               3.666
                                ERV = ENDING REDEEMABLE VALUE   $1,538.03
                                                                
                                TOTAL RETURN FOR PERIOD            53.80%

<PAGE>
 
                                                                   EXHIBIT 99.24

                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  20th day of March, 1997.



                                               /s/John R. Galvin          (L.S.)
                                          ------------------------------        
                                                 John R. Galvin
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
her attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in her name and stead, in her capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  20th  day of March, 1997.



                                           /s/Alice S. Ilchman          (L.S.)
                                    -----------------------------------
                                          Alice S. Ilchman
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  20th  day of March, 1997.



                                           /s/Frank A. McPherson       (L.S.)
                                    -----------------------------------
                                            Frank A. McPherson
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this 20th day of March, 1997.



                                              /s/John E. Merow           (L.S.)
                                          ------------------------------        
                                              John E. Merow
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
her attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in her name and stead, in her capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  20th day of March, 1997.



 
                                        
                                            /s/Betsy S. Michel           (L.S.)
                                        ---------------------------          
                                            Betsy S. Michel
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this   1st  day of April, 1997.




                                            /s/William C. Morris        (L.S.)
                                        --------------------------          
                                            William C. Morris
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  31st  day of March, 1997.



                                           /s/James C. Pitney           (L.S.) 
                                        --------------------------           
                                           James C. Pitney
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  31st  day of March, 1997.



                                           /s/James Q. Riordan          (L.S.) 
                                        --------------------------           
                                           James Q. Riordan
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this 1st day of April, 1997.



                                          /s/Ronald T. Schroeder        (L.S.) 
                                        --------------------------            
                                          Ronald T. Schroeder
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  20th  day of April, 1997.



                                           /s/Robert L. Shafer         (L.S.) 
                                        --------------------------             
                                           Robert L. Shafer
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this 20th day of April, 1997.



                                           /s/James N. Whitson        (L.S.)
                                        --------------------------              
                                           James N. Whitson
<PAGE>
 
                               POWER OF ATTORNEY
                               -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned director of SELIGMAN COMMON
STOCK FUND, INC., a Maryland corporation, which proposes to file with the
Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment Company Act of 1940, as amended, hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his attorneys-in-fact and agent, with full power of substitution and
resubstitution, for in his name and stead, in his capacity as such director, to
sign and file such Amendment to Registration Statement or further amendments
thereto, and any and all applications or other documents to be filed with the
Securities and Exchange Commission pertaining thereto, with full power and
authority to do and perform all acts and things requisite and necessary to be
done on the premises.

Executed this  1st  day of April, 1997.



                                             /s/Brian T. Zino        (L.S.)
                                        ---------------------------         
                                             Brian T. Zino


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission