ACACIA RESEARCH CORP
S-3/A, 1998-02-12
INVESTMENT ADVICE
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<PAGE>
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 12, 1998
    
   
                                                      REGISTRATION NO. 333-45397
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
   
                                AMENDMENT NO. 1
                                       TO
                                    FORM S-3
    
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
                          ACACIA RESEARCH CORPORATION
             (Exact name of Registrant as specified in its charter)
 
<TABLE>
<S>                                                     <C>
                      CALIFORNIA                                              95-4405754
           (State or other jurisdiction of                                 (I.R.S. Employer
            incorporation or organization)                              Identification Number)
</TABLE>
 
                            12 SOUTH RAYMOND AVENUE
                           PASADENA, CALIFORNIA 91105
                                 (626) 449-6431
 
              (Address, including zip code, and telephone number,
       including area code, of Registrants' principal executive offices)
                           --------------------------
                 KATHRYN KING-VAN WIE, CHIEF OPERATING OFFICER
                          ACACIA RESEARCH CORPORATION
                            12 SOUTH RAYMOND AVENUE
                           PASADENA, CALIFORNIA 91105
                                 (626) 449-6431
 
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                           --------------------------
                          COPIES OF COMMUNICATIONS TO:
                               D. STEPHEN ANTION
 
                             O'Melveny & Myers LLP
                             400 South Hope Street
                       Los Angeles, California 90071-2899
                                 (213) 669-6000
                           --------------------------
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
   FROM TIME TO TIME AFTER THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT,
 SUBJECT TO MARKET CONDITIONS AND CERTAIN CONTRACTUAL RESTRICTIONS ON TRANSFER.
                           --------------------------
 
    If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box.  / /
 
    If any of the securities being registered on this form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, as amended (the "Securities Act") other than securities offered only in
connection with dividend or interest reinvestment plans, check the following
box.  /X/
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering.  / /
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  / /
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box.  / /
                           --------------------------
                        CALCULATION OF REGISTRATION FEE
 
   
<TABLE>
<CAPTION>
                                                      NUMBER OF
                                                     SECURITIES        PROPOSED MAXIMUM     PROPOSED MAXIMUM
            TITLE OF EACH CLASS OF                OF EACH CLASS TO      OFFERING PRICE     AGGREGATE OFFERING        AMOUNT OF
          SECURITIES TO BE REGISTERED             BE REGISTERED(1)      PER SECURITY(2)         PRICE(2)         REGISTRATION FEE
<S>                                              <C>                  <C>                  <C>                  <C>
Common Stock, no par value per share...........        861,724             $8.625(3)          $7,432,370(3)          $2,193(5)
                                                       23,743             $8.40625(4)          $199,590(4)              $59
</TABLE>
    
 
   
(1) Includes a number of shares of Common Stock initially issuable upon exercise
    of certain warrants and options held by the Selling Securityholders and,
    pursuant to Rule 416 under the Securities Act, an indeterminate number of
    shares of Common Stock as may be issued from time to time upon exercise of
    such warrants or options by reason of adjustment of the number of shares of
    Common Stock to be issued upon such exercises under certain circumstances
    outlined in the Prospectus.
    
 
(2) Estimated solely for the purpose of calculating the registration fee.
 
   
(3) Pursuant to Rule 457(c), the price of the Common Stock is based upon the
    average of the high and low prices of the Common Stock on the Nasdaq
    National Market on January 28, 1998.
    
 
   
(4) Pursuant to Rule 457(c), the price of the Common Stock is based upon the
    average of the high and low prices of the Common Stock on the Nasdaq
    National Market on February 11, 1998.
    
 
   
(5) Previously paid.
    
                           --------------------------
 
   
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT, OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE
ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a), MAY
DETERMINE.
    
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
   
PROSPECTUS
    
 
                          ACACIA RESEARCH CORPORATION
 
   
                               885,467 SHARES OF
                                  COMMON STOCK
    
                               ------------------
 
   
    This Prospectus relates to the sale by the securityholders of Acacia
Research Corporation (the "Company") named herein (the "Selling
Securityholders") of up to an aggregate of 885,467 shares (subject to adjustment
in certain circumstances) of common stock, no par value per share (the "Common
Stock"), of the Company. Of the shares of the Common Stock covered by this
Prospectus, 226,002 shares were issued by the Company to certain of the Selling
Securityholders in a private placement completed by the Company in December 1997
(the "1997 Private Placement") pursuant to an exemption from registration
contained in Regulation D promulgated under Section 4(2) of the Securities Act
of 1933, as amended (the "Securities Act"). An additional 226,002 shares
(subject to adjustment in certain circumstances) of the Common Stock covered by
this Prospectus are issuable upon the exercise of warrants issued to certain of
the Selling Securityholders in the 1997 Private Placement. Another 403,413
shares of Common Stock covered by this Prospectus were issued by the Company to
certain Selling Securityholders in a series of independent, but related
transactions to acquire additional equity ownership in four of the Company's
affiliates--CombiMatrix Corporation, Greenwich Information Technologies LLC,
MerkWerks Corporation, and Soundview Technologies Incorporated. The remaining
30,050 shares (subject to adjustment in certain circumstances) of Common Stock
covered by this Prospectus are issuable upon the exercise of warrants to
purchase shares of Common Stock that have been issued by the Company to certain
of the Selling Securityholders. See "Selling Securityholders" and "Plan of
Distribution."
    
 
    The shares of Common Stock offered by this Prospectus may be sold from time
to time by the Selling Securityholders in privately negotiated transactions, in
brokers' transactions, to market makers or in block placements, at market prices
prevailing at the time of sale or at prices otherwise negotiated. See "Selling
Securityholders" and "Plan of Distribution." The Selling Securityholders, and
intermediaries through whom such securities are sold, may be deemed underwriters
within the meaning of the Securities Act with respect to the securities offered,
and any profits realized or commissions received may be deemed underwriting
compensation. The Company has agreed to indemnify the Selling Securityholders
against certain liabilities, including liabilities under the Securities Act.
 
    The Company will not receive any of the proceeds from the sale of the shares
of Common Stock being sold by the Selling Securityholders pursuant to this
Prospectus (although the Company will receive proceeds from the exercise of any
warrants by the Selling Securityholders). See "Selling Securityholders." The
Company has agreed to bear the expenses incurred in connection with the
registration of the shares offered by this Prospectus. The Selling
Securityholders will pay or assume brokerage commissions or similar charges
incurred in the sale of the shares offered by this Prospectus.
 
   
    The Company's Common Stock is traded on the Nasdaq National Market under the
symbol "ACRI." The closing sale price of the Common Stock on February 11, 1998,
as reported by Nasdaq, was $8.8125 per share.
    
 
   
    THE SECURITIES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK. SEE "RISK
FACTORS" BEGINNING ON PAGE 8.
    
 
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.
<PAGE>
               THE DATE OF THIS PROSPECTUS IS            , 1998.
<PAGE>
                             AVAILABLE INFORMATION
 
   
    The Company has filed with the Securities and Exchange Commission (the
"Commission"), a Registration Statement on Form S-3 under the Securities Act,
with respect to the securities offered hereby. This Prospectus does not contain
all of the information set forth in such Registration Statement and the exhibits
thereto. For further information with respect to the Company, reference is
hereby made to the Registration Statement and the exhibits thereto, which may be
inspected without charge at the Public Reference Facilities maintained at the
principal office of the Commission at 450 Fifth Street, N.W., Room 1024,
Washington D.C. 20549 and at the Commission's regional offices at 7 World Trade
Center, New York, New York 10048 and Northwestern Atrium Center, 500 West
Madison Street, Suite 1400, Chicago, Illinois 60661. Copies of such materials
may be obtained upon written request from the Public Reference Section of the
Commission, 450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed rates.
Electronic registration statements made through the Electronic Data Gathering,
Analysis and Retrieval System are publicly available through the Commission's
Web site (http://www.sec.gov). Statements contained in the Prospectus as to the
contents of any contract or other document referred to herein are not
necessarily complete and in each instance reference is made to the copy of such
contract or other document filed (or incorporated by reference) as an exhibit to
the Registration Statement, each such statement being qualified in all respects
by such reference.
    
 
    The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and, in accordance
therewith, files reports and other information with the Commission. Such reports
and other information filed by the Company may be inspected and copied at the
public reference facilities maintained by the Commission at the addresses shown
above. Copies of such material can be obtained from the Public Reference Section
of the Commission at the address shown above at prescribed rates or through the
Commission's Web site. Reports and other information concerning the Company may
also be inspected at the offices of the National Association of Securities
Dealers, Inc., 1735 K Street, N.W., Washington, D.C. 20006.
 
    The Company's Common Stock is traded on the Nasdaq National Market under the
symbol "ACRI." Certain information, reports and proxy statements of the Company
are also available for inspection at the offices of the Nasdaq National Market
Reports Section, 1735 K Street, Washington, D.C. 20006.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
   
    The following documents, which have been filed by the Company with the
Commission, as noted below, are incorporated by reference into this
Prospectus:(a) Annual Report on Form 10-K for the fiscal year ended December 31,
1996; (b) Amendment to Annual Report on Form 10-K/A for the fiscal year ended
December 31, 1996; (c) Amendment No. 2 to Annual Report on Form 10-K/A for the
fiscal year ended December 31, 1996; (d) Quarterly Report on Form 10-Q for the
quarter ended March 31, 1997; (e) Amendment to Quarterly Report on Form 10-Q/A
for the quarter ended March 31, 1997; (f) Amendment No. 2 to Quarterly Report on
Form 10-Q/A for the quarter ended March 31, 1997; (g) Quarterly Report on Form
10-Q for the quarter ended June 30, 1997; (h) Quarterly Report on Form 10-Q for
the quarter ended September 30, 1997; (i) Current Report on Form 8-K, event date
April 29, 1997; (j) Current Report on Form 8-K, event date July 6, 1997; (k)
Amendment to Current Report on Form 8-K/A, event date July 6, 1997; (l)
Amendment No. 2 to Current Report on Form 8-K/A, event date July 6, 1997; (m)
Current Report on Form 8-K, event date January 27, 1998; (n) the description of
the Common Stock contained in the Company's Registration Statement on Form 8-A
filed with the Commission on or about May 11, 1995; and (o) Amendment No. 1 to
Form 8-A on Form 8-A/A filed June 5, 1995.
    
 
    All documents subsequently filed by the Company pursuant to Sections 13(a),
13(c), 14 or 15(d) of the Exchange Act, prior to the termination of the offering
of the securities covered by this Prospectus, shall be deemed to be incorporated
by reference herein and to be a part hereof from the date of filing such
 
                                       2
<PAGE>
documents. Any statement contained herein or in any document incorporated or
deemed to be incorporated by reference herein shall be deemed to be modified or
superseded for the purposes of this Prospectus to the extent that a statement
contained herein or in any other subsequently filed document which also is or is
deemed to be incorporated by reference herein modifies or supersedes such
statement. Any such statement so modified or superseded shall not be deemed to
constitute a part of this Prospectus, except as so modified or superseded. The
Company hereby undertakes to provide without charge to each person, including
any beneficial owner, to whom a copy of this Prospectus has been delivered, upon
the written or oral request of such person, a copy of any or all of the
documents referred to in "Incorporation of Certain Information by Reference"
which have been or may be incorporated in this Prospectus by reference, other
than exhibits to such documents. Requests for such copies should be directed to
the Secretary at Acacia Research Corporation, 12 South Raymond Avenue, Pasadena,
California 91105.
 
                                       3
<PAGE>
                               PROSPECTUS SUMMARY
 
    THE FOLLOWING SUMMARY IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO, AND
SHOULD BE READ IN CONJUNCTION WITH, THE MORE DETAILED INFORMATION APPEARING
ELSEWHERE IN THIS PROSPECTUS OR INCORPORATED HEREIN. INVESTORS SHOULD ALSO
CAREFULLY CONSIDER THE INFORMATION SET FORTH UNDER THE HEADING "RISK FACTORS."
 
                                  THE COMPANY
 
    Acacia Research Corporation, a California corporation (the "Company"), is a
capital management company that provides investment advisory services, and also
provides management services to and makes direct investments in emerging
businesses. The Company's operations are comprised of two lines of business: (i)
investment advisor to domestic and offshore private investment funds; and (ii)
investing in and developing start-up business ventures. The Company is
diversified and each business segment is operated independently. See "Risk
Factors--No Assurance of Success."
 
    As a registered investment advisor, the Company currently manages two
domestic private investment partnerships whose limited partners are required to
be "accredited investors," under Regulation D promulgated under the Securities
Act. The Company is also the investment advisor to two offshore investment
corporations. Client funds are invested primarily in mid-cap to large-cap U.S.
equities. The Company may manage additional private investment partnerships and
offshore investment funds in the future. See "Risk Factors--Risks Associated
with the Money Management Business; Profitability Uncertain."
 
    The Company also participates in the formation of emerging or start-up
companies in various business fields by arranging for and contributing capital
and providing management assistance. Potential ventures are evaluated based on
the ability of the business to become viable and reach a significant milestone
with the Company's initial investment. See "Risk Factors--Risks Associated with
the Emerging Companies."
 
   
    The Company has significant economic interests in five companies that it has
formed and takes an active role in each company's growth and advancement. The
Company holds majority interests in the following companies: (i) 66.7 percent of
the outstanding common stock of Soundview Technologies Incorporated, a Delaware
corporation ("Soundview Technologies"); (ii) 89.6 percent of the outstanding
common stock of MerkWerks Corporation, a California corporation ("MerkWerks");
and (iii) 52.7 percent of the outstanding common stock of CombiMatrix
Corporation, a California corporation ("CombiMatrix"). The Company holds
minority interests in the following companies: (i) a 33.33 percent membership
interest in Greenwich Information Technologies LLC, a Delaware limited liability
company ("Greenwich Information Technologies"); and (ii) 18.4 percent of the
outstanding common stock of Whitewing Labs, Inc., a Delaware corporation
("Whitewing") (with voting control over 27.3 percent of the common stock in
connection with certain loans made by the Company secured by common stock of
Whitewing). Soundview Technologies, Greenwich Information Technologies,
MerkWerks, CombiMatrix, and Whitewing are collective referred to hereinafter as
the "Affiliates." See "Risk Factors" for risks associated with each individual
Affiliate.
    
 
    Soundview Technologies was formed in 1996 and owns intellectual property
related to the telecommunications field, which includes audio and video blanking
systems, also known as V-chip technology. Soundview Technologies has developed a
V-chip retrofit device, the V Chip Converter-TM-, for use in televisions already
in existence that will be "deaf" to V-chip signals. Soundview Technologies has
begun to pursue business opportunities with television manufacturers, chip
manufacturers, and television accessory companies about efficient and
cost-effective methods of commercializing its technology. Soundview Technologies
has incurred substantial losses and has not had any revenues to date.
 
    Greenwich Information Technologies was formed in 1996 and is the exclusive
marketing and licensing agent for several patents relating to video-on-demand
and audio-on-demand technology. To date, Greenwich Information Technologies has
incurred substantial losses and has not had any revenues.
 
                                       4
<PAGE>
    MerkWerks was formed in 1995 and is currently developing a software utility
product for use with CD-Recorder, or CD-R, computer drives. The initial version
of the product, CD WonderWriter-TM-, will be for the Macintosh platform.
MerkWerks anticipates adapting this software for Microsoft-Registered Trademark-
Windows-TM- platform. To date, MerkWerks has incurred substantial losses and has
not had any revenues.
 
    CombiMatrix was formed in 1995 and is engaged in a highly specialized and
focused research effort to create products which would be used to streamline the
drug-discovery process. CombiMatrix is in a developmental stage, has incurred
substantial losses and has not generated any revenues to date.
 
    Whitewing was formed in 1993 and develops and markets a line of nutritional
supplement products. Whitewing conducted an initial public offering of its
common stock in February 1996. Whitewing stock and warrants trade on the Nasdaq
Small Cap Market under the symbols "WWLI" and "WWLI-W," respectively.
 
    Development of emerging businesses is subject to all of the problems,
expenses, delays and risks inherent in the establishment of a new business
enterprise, many of which are beyond the Company's ability to control, including
uncertain market conditions, product acceptance, cost and availability of
capital, and the absence of an operating history. Moreover, the Company expects
to encounter competition in the area of business opportunities from other
entities having similar business objectives, such as venture capital funds. Many
of these potential competitors may possess greater financial, technical, human
and other resources than the Company. Accordingly, there can be no assurance
that the Company's plan of operations will be successful or that the Company
will be able to achieve or maintain profitable operations. See "Risks
Factors--No Assurance of Success" and "Risks Associated with the Emerging
Companies."
 
    The Company has never paid any cash dividends on its Common Stock and does
not anticipate that it will pay dividends in the foreseeable future. Instead,
the Company intends to apply any earnings to the development and expansion of
its business.
 
    The Company was incorporated in the State of California on January 25, 1993,
and conducted its initial public offering on June 15, 1995. The Company's Common
Stock trades on the Nasdaq National Market System ("Nasdaq") under the symbol
"ACRI."
 
    The Company maintains its executive offices at 12 South Raymond Avenue,
Pasadena, California 91105 and its telephone number is (626) 449-6431.
 
                                       5
<PAGE>
                              RECENT DEVELOPMENTS
 
    In May 1997, MerkWerks announced the completion of an alpha version of its
initial software product, CD-WonderWriter-TM-. MerkWerks has not yet completed
the beta version of such product.
 
   
    In June 1997, the Company sold 290,200 units at a purchase price of $5.00
per unit to 37 accredited investors (the "June Private Placement"). The
Company's sale of these units was exempt from registration, as a private
placement, under Section 4(2) of the Securities Act and Regulation D promulgated
thereunder. Each unit consisted of one Common Stock purchase warrant and one
share of the Company's Common Stock. Each Common Stock purchase warrant entitles
its holder to purchase one share of the Company's Common Stock at an exercise
price of $7.50 per share, subject to adjustment, and expires on June 8, 2000.
Finders involved in this transaction received finders fees at a rate of $0.50
per unit placed and one finder warrant per ten units placed. Each finder warrant
may be exercised prior to June 8, 2000 for one share of the Company's Common
Stock at an exercise price of $5.50 per share, subject to adjustment. The
Company has the right to redeem all of the warrants issued in the 1997 Private
Placement on 30 days prior written notice at a redemption price of $0.01 per
warrant if the closing bid price of the Company's Common Stock averages $10.00
or above for 20 consecutive trading days after the Common Stock reaches a
closing bid price of at least $10.00 on the Nasdaq National Market. If the
Company elects to exercise its redemption right, the holder of the warrant may
either exercise the warrant, in whole or in part, or tender the warrant to the
Company for redemption, in whole or in part. Within five business days after the
end of the 30-day period, the Company will mail a check for the redemption price
to the holder of the warrant should the warrant remain outstanding, in whole or
in part, as of the end of the 30-day period, whether or not the holder has
surrendered the warrant for redemption. The warrant may not be exercised after
the end of any such 30-day period.
    
 
   
    On July 6, 1997, the Company purchased from H. Lee Browne and David Schmidt
a total of 2,625,000 shares (the "Soundview Shares") of common stock, $.001 par
value per share, of Soundview Technologies, pursuant to the terms of a Common
Stock Purchase Agreement among the Company and each of Messrs. Browne and
Schmidt dated July 6, 1997. The Soundview Shares represent 35% of the
outstanding capital stock of Soundview Technologies. As a result of the
transaction, the Company held approximately 51% of the outstanding common stock
of Soundview Technologies.
    
 
    The purchase price for the Soundview Shares consisted of a total of 400,000
shares of Common Stock of the Company, $500,000 in cash and the issuance of
non-recourse promissory notes to each of Messrs. Browne and Schmidt in the
aggregate principal amount of $900,000 (the "Notes"). A portion of the proceeds
of the June Private Placement was used to fund the cash component of the
transaction. The Notes were paid in full in December 1997 using a portion of the
proceeds of the 1997 Private Placement.
 
    Pursuant to the Common Stock Purchase Agreement, the Company and each of
Messrs. Browne and Schmidt entered into an Amended and Restated Stockholders'
Agreement to provide for elections of directors and other matters relating to
Soundview. In addition, as part of the transaction, Soundview entered into five
year employment agreements with each of Messrs. Browne and Schmidt.
 
    In December 1997, the Company sold 226,002 units at a purchase price of
$7.50 per unit to 51 accredited investors (the "1997 Private Placement"). The
Company's sale of these units was exempt from registration, as a private
placement, under Section 4(2) of the Securities Act of 1933 and Regulation D
promulgated thereunder. Each unit consisted of one Common Stock Purchase Warrant
and one share of the Company's Common Stock. Each Common Stock Purchase Warrant
entitles its holder to purchase one share of the Company's Common Stock at an
exercise price of $10.00 per share, subject to adjustment, and expires on
November 30, 2000. Finders involved in this transaction received finders fees at
a rate of $0.50 per unit placed and one finder warrant per ten units placed.
Each finder warrant may be exercised prior to November 30, 2000 for one share of
the Company's Common Stock at an exercise price of $8.25 per share, subject to
adjustment. The Company has the right to redeem all of the warrants issued in
the 1997 Private
 
                                       6
<PAGE>
Placement on 30 days prior written notice at a redemption price of $0.01 per
warrant if the closing bid price of the Company's Common Stock averages $15.00
or above for 20 consecutive trading days after the Common Stock reaches a
closing bid price of at least $15.00 on the Nasdaq National Market System. If
the Company elects to exercise its redemption right, the holder of the warrant
may either exercise the warrant, in whole or in part, or tender the warrant to
the Company for redemption, in whole or in part. Within five business days after
the end of the 30-day period, the Company will mail a check for the redemption
price to the holder of the warrant should the warrant remain outstanding, in
whole or in part, as of the end of the 30-day period, whether or not the holder
has surrendered the warrant for redemption. The warrant may not be exercised
after the end of any such 30-day period.
 
   
    In January 1998, the Company completed a series of independent, but related
transactions with certain Selling Securityholders, which resulted in the
acquisition of additional equity ownership in four of the Affiliates by the
Company in exchange for issuances of shares of Common Stock of the Company. A
total of 44 transactions were completed. The aggregate number of shares (or
percentage of membership interests in the case of Greenwich Information
Technologies) acquired and the number of shares of Common Stock issued by the
Company are set forth below:
    
 
   
<TABLE>
<CAPTION>
                                                                  NO. OF
                                                                 AFFILIATE     NO. OF COMPANY
                                                              SHARES ACQUIRED   SHARES ISSUED
                                                              ---------------  ---------------
<S>                                                           <C>              <C>
CombiMatrix.................................................        100,000          22,085
Greenwich Information Technologies..........................           3.31%         51,017
MerkWerks...................................................        401,359          85,975
Soundview Technologies......................................      1,144,000         244,336
</TABLE>
    
 
                           FORWARD-LOOKING STATEMENTS
 
    This Prospectus contains forward-looking statements within the meaning of
the "safe harbor" provisions of the Private Securities Litigation Reform Act of
1995. Reference is made in particular to the description of the Company's plans
and objectives for future operations, assumptions underlying such plans and
objectives and other forward-looking statements included in this Prospectus.
Such statements may be identified by the use of forward-looking terminology such
as "may," "will," "expect," "believe," "estimate," "anticipate," "intend,"
"continue," or similar terms, variations of such terms or the negative of such
terms. Such statements are based on management's current expectations and are
subject to a number of factors and uncertainties which could cause actual
results to differ materially from those described in the forward-looking
statements. The Company expressly disclaims any obligation or undertaking to
release publicly any updates or revisions to any forward-looking statements
contained herein to reflect any change in the Company's expectations with regard
thereto or any change in events, conditions or circumstances on which any such
statement is based. Factors which could cause such results to differ materially
from those described in the forward-looking statements include those set forth
below.
 
                                       7
<PAGE>
                                  RISK FACTORS
 
    AN INVESTMENT IN THE SHARES OF COMMON STOCK OFFERED HEREBY IS SPECULATIVE,
INVOLVES A HIGH DEGREE OF RISK AND SHOULD ONLY BE MADE BY INVESTORS WHO CAN
AFFORD TO LOSE THEIR ENTIRE INVESTMENT. THIS PROSPECTUS CONTAINS, IN ADDITION TO
HISTORICAL INFORMATION, FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS AND
UNCERTAINTIES. THE COMPANY'S ACTUAL RESULTS COULD DIFFER MATERIALLY. (SEE
"FORWARD-LOOKING STATEMENTS.") FACTORS THAT COULD CAUSE OR CONTRIBUTE TO SUCH
DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED BELOW, AS WELL AS
THOSE DISCUSSED ELSEWHERE IN THIS PROSPECTUS OR INCORPORATED HEREIN BY
REFERENCE. PROSPECTIVE PURCHASERS, PRIOR TO MAKING AN INVESTMENT, SHOULD
CAREFULLY CONSIDER THE FOLLOWING RISK FACTORS, AS WELL AS THE OTHER INFORMATION
SET FORTH IN THIS PROSPECTUS, THE EXHIBITS HERETO AND THE DOCUMENTS INCORPORATED
BY REFERENCE HEREIN.
 
NO ASSURANCE OF SUCCESS
 
    The Company's operations are comprised of two lines of business: (i)
management of private investment funds; and (ii) investing in start-up business
ventures. The Company's business operations are subject to numerous risks
associated with managing investment funds and establishing new business
ventures. Continued implementation of the plan of operations of the Company and
each of the Company's new business ventures will be subject to all of the
problems, expenses and uncertainties inherent in the establishment of new
business enterprises, many of which are subject to outside influences over which
the Company has no control, including technological advances and product
obsolescence, uncertain market acceptance, increased levels of competition,
increases in operating costs including costs of supplies, personnel, and
equipment, the availability and cost of capital, reduced margins caused by
competitive pressures and changes in general economic conditions and
governmental regulation imposed under federal, state or local laws. There can be
no assurance that the Company's new business ventures will be able to market any
product on a commercial scale, that these new business ventures will ever
achieve or maintain profitable operations or that they, or the Company, will be
able to remain in business.
 
   
SIGNIFICANT LIKELIHOOD OF LOSSES FOR FISCAL 1997
    
 
   
    The Company has a significant likelihood of incurring a net loss for its
most recent fiscal year ended on December 31, 1997. It its last quarterly report
on Form 10-Q filed with the Commission for the nine months ending September 30,
1997, the Company reported an unaudited net loss of $2,050,553 or $0.89 per
share. Although the Company has not finalized its operating results for its most
recent fiscal year as of the date of this Prospectus, the Company believes it
will report a net loss for the fiscal year.
    
 
RISKS ASSOCIATED WITH THE MONEY MANAGEMENT BUSINESS; PROFITABILITY UNCERTAIN
 
    Although management of the Company has had extensive experience in the
investment industry, the Company itself is a recently formed business entity and
has a short history of operations and only limited revenues. The Company
currently manages two domestic partnership funds and two offshore investment
funds. The Company invests a portion of its own funds in the domestic
partnership funds as a general partner. The Company does not invest Company
funds in the offshore investment funds. From its inception through September 30,
1997, the Company has received approximately $419,000 in aggregate performance
and management fees from managing the four investment funds. The Company is
attempting to increase the assets invested in the various funds it manages.
There can be no assurance as to the level of additional capital that the Company
will be able to raise for its investment funds.
 
    The Company has formulated its plan of operations based on certain
assumptions regarding the potential monies that will be invested in its funds
under management and the anticipated performance of, and profits that can be
realized by, these funds. Although these assumptions are based on the best
estimates of management, there can be no assurance that these assessments will
prove to be correct. Any future success of the Company will depend upon many
factors, including factors which may be beyond the control of the Company or
which cannot be predicted at this time. These factors include the amount of
assets under management in the Company's investment funds, the performance of
those funds, the overall
 
                                       8
<PAGE>
performance of the equity markets in the United States, the success of the
Company's stock selecting strategy and other factors. The Company's income from
managing the investment funds is comprised of fixed management fees, as well as
performance fees which are based on the performance of each individual fund, as
the Company receives a percentage of the profit earned by each fund.
 
POTENTIAL FLUCTUATIONS IN THE FUTURE RESULTS OF OPERATION OF THE COMPANY
 
    The Company's operating results may vary significantly from quarter to
quarter due to a variety of factors including the amount of money invested in
the private investment funds managed by the Company, the performance of such
investment funds, the results of operations of the Affiliates, the nature and
timing of investments in new businesses by the Company and the timing of the
sales of securities of the Affiliates.
 
    The Company also expects to incur significant start-up expenses in pursuing
and developing new business ventures. To date, the Company has lacked a
consistent source of recurring revenue and most of its revenues have come from
sales of securities of the Affiliates.
 
POTENTIAL FLUCTUATIONS IN FUTURE RESULTS OF OPERATIONS OF THE AFFILIATES
 
    To date, Whitewing has experienced substantial operating losses and its
operating results have varied significantly from quarter to quarter due to a
variety of factors. For further information regarding the nature of and the
fluctuations in Whitewing's operating results, potential investors are directed
to review Whitewing's filings under the Exchange Act, available from the
Commission.
 
    CombiMatrix, MerkWerks, Greenwich Information Technologies and Soundview
Technologies have generated no revenues to date. The Company anticipates that
any results of operations of these Affiliates are likely to vary significantly
as a result of a number of factors, including the timing of new product
introductions by each of these Affiliates, the novelty of the technology owned
by these Affiliates, the strength of each of these Affiliates' intellectual
property rights, each Affiliates ability to exploit its technology, the volume
and timing of orders received, product line maturation, the impact of price
competition, and each Affiliate's ability to access distribution channels. Many
of these factors are beyond the control of the Affiliates. There can be no
assurance that any Affiliate will experience growth in the future or be
profitable on an operating basis in any future period.
 
RISKS ASSOCIATED WITH THE EMERGING COMPANIES
 
    Involvement in emerging companies is marked by a high degree of risk,
including difficulties in selecting ventures with viable business plans and
acceptable likelihoods of success and future profitability. There is a high
probability of loss associated with investments in start-ups. Identifying and
developing each new business opportunity also requires the Company to dedicate
significant amounts of financial resources, management attention and personnel,
with no assurance in any individual case that these expenditures will prove
fruitful.
 
    The Company generally invests in start-up ventures with no operating
histories, unproven technologies and products and, in some cases, the need for
identification and implementation of experienced management. Because of the
uncertainties and risks associated with such start-up ventures, investors in the
Company should expect substantial losses associated with failed ventures. In
addition, markets for venture capital in the United States are increasingly
competitive. As a result, the Company faces potential losses of business
opportunities and possible deterioration of the terms of available financings
and equity investments in start-up ventures. Furthermore, the Company may lack
financial resources to fully fund additional ventures in which it could
participate and the Company as well as its Affiliates may be dependent upon
external financing to provide sufficient capital.
 
                                       9
<PAGE>
UNCERTAINTY OF EMERGING COMPANIES; LACK OF MARKET ACCEPTANCE OF PRODUCTS
 
    COMBIMATRIX. CombiMatrix was incorporated in October 1995 and began
operations in April 1996. CombiMatrix is developing technologies involving
combinatorial chemistry, which could represent significant improvements over
existing technologies in the speed and cost-effectiveness of drug discovery.
CombiMatrix is a development stage company without any current products or
revenues. Its current activities relate almost exclusively to research and
development.
 
    The Company's investment in CombiMatrix is subject to the risks associated
with new technologies, including the viability of the technology, unknown market
acceptance, difficulties in obtaining financing, the strength of its
intellectual property protection, increasing competition, and the ability to
convert technology into revenues. In addition, because the technologies critical
to the success of this industry are in their infancy, no assurances can be given
that CombiMatrix will be able to successfully implement its technologies. In the
event its technologies prove to be successful, CombiMatrix intends to pursue
collaborations with pharmaceutical companies, which may include the licensing of
CombiMatrix's screening libraries and possibly the licensing of internally
developed chemical compounds. No assurances can be given that CombiMatrix, even
if successful in developing its technologies, would be able to successful
implement the collaborative efforts with pharmaceutical companies.
 
    CombiMatrix intends to vigorously protect its intellectual property rights.
There can be no assurance, however, that CombiMatrix's pending patent
applications will issue or that a third party will not violate, or attempt to
invalidate, CombiMatrix's intellectual property rights, possibly forcing
CombiMatrix to expend substantial legal fees. Successful challenges to certain
of CombiMatrix's patents, if issued, would materially adversely affect
CombiMatrix's business, operating results, financial condition and prospects.
 
    There can be no assurance that certain aspects of CombiMatrix's technology
will not be reverse-engineered by third parties without violating CombiMatrix's
proprietary rights. CombiMatrix's existing protections also may not preclude
competitors from developing products with features and prices similar to or
better than those of CombiMatrix.
 
    GREENWICH INFORMATION TECHNOLOGIES. Greenwich Information Technologies was
formed in June 1996 and is the exclusive marketing and licensing agent for a
number of domestic and international patents and other intellectual property
pertaining to information-on-demand systems. Although Greenwich Information
Technologies believes that it has marketing and licensing rights to enforceable
patents, no assurances can be given that other companies will not challenge the
underlying patents to these rights or develop competing technologies that do not
infringe such patents. Furthermore, whether or not competing products emerge, it
is uncertain whether and to what extent Greenwich Information Technologies will
be able to profitably market and license its rights to the information-on-demand
technology.
 
    SOUNDVIEW TECHNOLOGIES. Soundview Technologies was formed in March 1996 to
commercialize patent rights of a method of video and audio blanking technology,
also known as V-chip technology, that screens objectionable television
programming and blocks it from the viewer. Although Soundview Technologies
believes that it owns an enforceable patent on its technology, no assurances can
be given that other companies will not challenge Soundview Technologies' patent
rights or develop competing technologies that do not infringe Soundview
Technologies' patent. Additionally, whether or not competing products emerge, it
is uncertain whether and to what extent Soundview Technologies will be able to
profitably exploit its technology.
 
    MERKWERKS. MerkWerks was formed in September 1995 as a software development
company, whose first product is expected to be software for use with
CD-recordable disk drives for Macintosh platforms. MerkWerks is in the
developmental stage and, to date, has not completed the development of any
products or generated any revenues. No assurances can be given that MerkWerks
will ever be able to successfully market its products or that a market for such
products will develop.
 
                                       10
<PAGE>
    The success of MerkWerks' software depends on its acceptance by original
equipment manufacturers (OEMs) that produce CD-recordable disk drives. MerkWerks
strategy is to convince these OEMs of the utility of MerkWerks' software so that
the OEMs will install such software in the CD-recordable disk drives prior to
their sale to the end-user, which will generate license fees for MerkWerks and
generate market acceptance of MerkWerks' platform. No assurances can be given
that MerkWerks' software will gain the acceptance of OEMs or ever be
incorporated into CD-recordable disk drives.
 
    MerkWerks' initial software release is expected to be designed for use with
the Macintosh platform. In addition, MerkWerks anticipates adapting its software
to the Windows platform. However, it is uncertain whether MerkWerks will be
successful in adapting its software to the Windows platform, and, if successful,
whether a viable market will develop for this product.
 
UNCERTAIN REVENUES OF AFFILIATES
 
    CombiMatrix, MerkWerks, Greenwich Information Technologies and Soundview
Technologies have generated no revenues to date and have had substantial losses.
Although each of these companies is developing products for marketing and
commercial sale, either through direct sales or licensing, no assurances can be
given that any of these companies will ever generate meaningful revenues or will
ever be profitable.
 
AFFILIATES' NEED FOR ADDITIONAL CAPITAL; SUBSEQUENT FINANCINGS
 
    To date, the Affiliates have primarily relied upon the sale of equity
securities, including sales to the Company, to generate the funds needed to
finance the implementation of their plans of operations. The Affiliates may be
required to obtain additional financing through bank borrowings, debt or equity
financings or otherwise, or curtail such activities. No assurance can be given
that the Affiliates will continue to be able to obtain financing or will obtain
financing on favorable terms.
 
LACK OF MANAGEMENT; NEED FOR MARKETING AND SALES PERSONNEL
 
    CombiMatrix, MerkWerks, Greenwich Information Technologies and Soundview
Technologies have generated no revenues to date. There can be no assurance these
companies will be able to meet their anticipated working capital needs for
developing their products. Failure to properly develop these products will
prevent these companies from generating meaningful product sales. Further
success in developing commercially viable products will create the need for
these companies to expand their management personnel. Some of these companies
will require the Company's assistance in identifying and implementing
experienced management teams and no assurances can be given that these companies
will be successful in assembling qualified and effective management teams.
 
    Additionally, unlike Greenwich Information Technologies and Soundview
Technologies, which intend to license their respective technologies to third
parties for commercial exploitation, CombiMatrix and MerkWerks currently intend
to develop, manufacture, market and sell their respective products directly to
customers. Because CombiMatrix and MerkWerks have not completed the research and
development of their products, they have not hired marketing and sales personnel
or finalized strategic marketing plans. There can be no assurance that
CombiMatrix and MerkWerks will be able to attract and retain qualified marketing
and sales personnel or that any marketing efforts undertaken by the companies
will be successful.
 
DEPENDENCE ON KEY PERSONNEL; NEED TO RETAIN PERSONNEL
 
    The Company's success will depend on its ability to attract, retain and
motivate the qualified personnel that will be essential to the Company's current
plans and future development. The competition for such personnel is intense and
there can be no assurance that the Company will be successful in
 
                                       11
<PAGE>
retaining its existing key employees or in attracting and retaining the required
additional personnel. In particular, the success of the Company and each
Affiliate will also be greatly determined by the retention, motivation and
success of the individuals discussed in the following paragraphs regarding the
Company and its Affiliates:
 
    THE COMPANY. The Company's success will depend to a significant extent upon
the continued services of Paul R. Ryan, the Company's President and Chief
Executive Officer, who also serves as a co-general partner of the two domestic
private investment partnerships and as portfolio manager for the two offshore
investment funds. The Company does not maintain key person life insurance
coverage with respect to Mr. Ryan.
 
    COMBIMATRIX. CombiMatrix's success will depend to a significant extent upon
the continued services of, CombiMatrix's Vice President-Research and
Development. The Company maintains key person life insurance coverage with
respect to this individual in the amount of $1,000,000.
 
    GREENWICH INFORMATION TECHNOLOGIES. Greenwich Information Technologies'
success will depend to a significant extent upon the continued services of H.
Lee Browne, Greenwich Information Technologies' President and Chief Executive
Officer. Neither Greenwich Information Technologies nor the Company maintains
key person life insurance coverage with respect to Mr. Browne.
 
    SOUNDVIEW TECHNOLOGIES. Soundview Technologies' success will depend to a
significant extent upon the continued services of H. Lee Browne, Soundview
Technologies' President and Chief Executive Officer, and David Schmidt,
Soundview Technologies' Vice President and Director of Technology. Neither
Soundview Technologies nor the Company maintains key person life insurance
coverage with respect to Mr. Browne or Mr. Schmidt.
 
    MERKWERKS. MerkWerks' success will depend to a significant extent upon the
continued service of James Merkle, Jr., MerkWerks' President. The Company
currently maintains key person life insurance coverage with respect to Mr.
Merkle in the amount of $1,000,000.
 
COMPETITION FACING THE COMPANY'S MONEY MANAGEMENT BUSINESS
 
    Competition in the investment markets and among providers of investment
management services is intense. Some of these competing providers have greater
financial, marketing and other resources, as well as greater research
capabilities than the Company. The Company believes that its products and
services are differentiated from those of its competitors and well-suited for
the investment marketplace. However, there can be no assurance that the Company
will prove successful in its efforts to attract the desired amount of funds for
investment in the funds managed by the Company.
 
COMPETITION FACING THE AFFILIATES
 
    WHITEWING. The markets for Whitewing's products are intensely competitive.
The nutritional supplements market is characterized by frequent product
introductions, short product life cycles, rapid price declines and eroding
profit margins and evolving customer preferences. In each of its product lines,
Whitewing competes and is expected in the future to compete with a large number
of companies with significantly greater financial and other resources. Many of
Whitewing's current and potential competitors have significantly greater name
recognition, research capabilities and financial and technical resources than
Whitewing, and many have longstanding positions and established brand names in
their markets.
 
    COMBIMATRIX. The pharmaceutical and biotechnology industries are subject to
intense competition and rapid and significant technological change. Many
organizations are actively attempting to identify and optimize compounds and
build libraries for potential pharmaceutical development. CombiMatrix will
compete directly with the research departments of pharmaceutical companies,
biotechnology companies, other combinatorial chemistry companies, and research
and academic institutions. Many of these competitors have greater financial and
other resources, and more experience in research and development, than
 
                                       12
<PAGE>
CombiMatrix. Historically, pharmaceutical companies have maintained close
control over their research activities, including the synthesis, screening, and
optimization of chemical compounds. Many of these companies, which represent the
greatest potential market for CombiMatrix's services and compounds, are
developing combinatorial chemistry and other methodologies to improve
productivity. In addition, these companies may already have large collections of
compounds previously synthesized or ordered from chemical supply catalogs or
other sources against which they may screen new targets. Other sources of
compounds include compounds extracted from natural products, such as plants and
microorganisms, and compounds created using rational drug design. Academic
institutions, governmental agencies and other research organizations are also
conducting research in areas in which CombiMatrix is working, either on their
own or through collaborative efforts.
 
    CombiMatrix anticipates that it will face increased competition in the
future as new companies enter the market and advanced technologies become
available. CombiMatrix's processes may be rendered obsolete or uneconomical by
technological advances or entirely different approaches developed by one or more
of CombiMatrix's competitors. The existing approaches of CombiMatrix's
competitors or new approaches or technology developed by CombiMatrix's
competitors may be more effective than those developed by CombiMatrix.
 
    GREENWICH INFORMATION TECHNOLOGIES. Although Greenwich Information
Technologies believes that it has marketing and licensing rights to enforceable
patents and other intellectual property relating to video and audio on demand,
no assurances can be given that other companies will not develop competing
technologies that offer better or less expensive alternatives to those offered
by Greenwich Information Technologies. In the event a competing technology
emerges, Greenwich Information Technologies would expect substantial
competition. Potential competitors could have significantly greater research
capabilities and financial and technical resources than Greenwich Information
Technologies, and some could have established brand names in the market for such
products.
 
    SOUNDVIEW TECHNOLOGIES. Soundview Technologies believes that its V-chip
technology is protected by enforceable patent rights. However, no assurances can
be given that other companies will not develop competing technologies that offer
better or less expensive alternatives to those offered by Soundview
Technologies. Many potential competitors could have significantly greater
research capabilities and financial and technical resources than Soundview
Technologies, and some could have established brand names in the market for
television products.
 
    MERKWERKS. There are currently at least 25 CD-recordable disk drive software
packages on the market. MerkWerks' first product is not yet complete or ready
for sale. Thus, the acceptance of MerkWerks' software in the market is unproven
and speculative. The markets for software products are intensely competitive and
are characterized by rapid changes in technological standards. MerkWerks faces
competition from large companies with substantial technical, marketing and
financial resources, allowing them to aggressively develop, enhance and market
competing products. These advantages may allow competitors to dominate
distribution channels and to respond more quickly than MerkWerks to emerging
technologies or to changing customer requirements. Numerous actions by these
competitors, including price reductions and product giveaways, increased
promotion, the introduction of enhanced products and product bundling could have
a material adverse effect on MerkWerks ability to develop and market its
software products and on MerkWerks business, financial condition and operating
results.
 
PROPRIETARY TECHNOLOGY
 
    The success of the business of CombiMatrix, Greenwich Information
Technologies, Soundview Technologies, and MerkWerks relies, to varying degrees,
on proprietary technology and the protection and exclusivity thereof.
CombiMatrix, Greenwich Information Technologies, and Soundview Technologies will
depend largely on the protection of enforceable patent rights. CombiMatrix
currently has an application on file with the United States Patent and Trademark
Office seeking a patent on its core technology, while Greenwich Information
Technologies and Soundview Technologies have patent or rights to patents that
 
                                       13
<PAGE>
have been issued as well as have additional patents pending. MerkWerks intends
to rely on a combination of statutory and common law, copyright, trademark and
trade secret law, and licensing agreements to protect its software product. No
assurances can be given that pending patent applications will issue, third
parties will not violate, or attempt to invalidate the Affiliates' intellectual
property rights, or certain aspects of the Affiliates' intellectual property
will not be reversed-engineered by third parties without violating the
Affiliates' proprietary rights.
 
    In addition to the protection that may be afforded by patents and the
various laws protecting proprietary rights, the Affiliates enter into
confidentiality agreements with certain third parties and to generally limits
access to information relating to their intellectual property. Despite these
precautions, third parties may be able to gain access to and use their
intellectual property to develop similar competing technologies and/or products.
Any substantial unauthorized use of the Affiliates patent and other proprietary
rights, could materially and adversely affect the business and operational
results of the Affiliates.
 
NEW PRODUCTS AND TECHNOLOGICAL CHANGES AFFECTING THE AFFILIATES
 
    The markets for each Affiliate's products are also marked by extensive
competition, rapidly changing technology, frequent product improvements, and
evolving industry standards. The success of each Affiliate will depend on its
ability to develop and market new products or enhance existing ones to meet the
evolving needs of the market for such products. There can be no assurance that
the Affiliates' existing or future products will be successful or profitable. In
addition, there can be no assurance that products or technologies developed by
others will not render the Affiliates' products noncompetitive or obsolete.
There can be no assurance that the Company's capital requirement will not
increase or that the Company will have sufficient revenues, if any, after such
time to fund its basic operating requirements or to continue funding new
business ventures.
 
LIMITED OPERATING HISTORY
 
    The Company commenced operations in 1993 and, accordingly, has a limited
operating history. The Company's prospects must be considered in light of the
risks, expenses, and difficulties frequently encountered by companies with such
limited operating histories. Since the Company has a limited operating history,
there can be no assurance that its operations will be profitable or that it will
generate sufficient revenues to meet its expenditures and support its
activities.
 
NEED FOR ADDITIONAL CAPITAL; SUBSEQUENT FINANCINGS
 
    To date, the Company has relied upon the sale of equity securities to
generate the funds needed to finance the implementation of its plan of
operations. The Company has in the past also relied on gains from the sale of
investment securities, including those of Whitewing, CombiMatrix, Soundview
Technologies, and MerkWerks, as well as equity interests in Greenwich
Information Technologies as additional sources of revenue. There can be no
assurance that the Company's capital requirements will not increase or that the
Company will have sufficient revenues, if any, after such time to fund its basic
operating requirements or to continue funding new business ventures. The Company
may be required to obtain additional financing through bank borrowings, debt or
equity financings or otherwise. No assurance can be given that such financing
may be obtained on terms favorable to the Company.
 
MINORITY POSITIONS IN CERTAIN AFFILIATES
 
    WHITEWING. The Company currently owns 532,459 shares of the common stock of
Whitewing, representing 18.4% of the outstanding shares and has voting control
over 789,709 shares of common stock of Whitewing, representing 27.3% of the
outstanding shares. R. Bruce Stewart, the Company's Chief Financial Officer, is
Chairman of the Board of Directors of Whitewing and Paul Ryan, the Company's
President and Chief Executive Officer, is also a member of the Board of
Directors of Whitewing,
 
                                       14
<PAGE>
representing half of Whitewing's Board of Directors. This minority position and
board representation results in the Company having influence at Whitewing, but
not the ability to control the decision-making at Whitewing.
 
    GREENWICH INFORMATION TECHNOLOGIES. The Company currently maintains a
membership interest of 33.33% in Greenwich Information Technologies. Although a
senior member of Greenwich Information Technologies, the Company does not hold a
majority of the board of three senior members. Similarly, the Company has no
control over the day to day operations of Greenwich Information Technologies,
which are directed by the chief executive officer, H. Lee Browne. This minority
position results in the inability of the Company to control or direct the
decision-making of Greenwich Information Technologies in any meaningful way.
 
MANAGEMENT AND PERFORMANCE FEES
 
    The level of management and performance fee revenue received by the Company
will depend upon the amount of money invested in the funds managed by the
Company, which in turn will depend to a large extent upon the performance of the
funds managed by the Company. There can be no assurance that the Company will
prove successful in raising any additional capital for the investment funds
managed by the Company.
 
INVESTMENT IN THE PARTNERSHIP
 
    As of September 30, 1997, the Company's had $553,941 invested in the two
domestic private partnership funds it manages, and may invest additional amounts
to acquire or increase its interests in these or other funds. To the extent that
the Company's funds are so committed, they will be subject to all of the risks
to be encountered by all investors in such funds as a result of the investment
strategy adopted for the funds by the Company as a general partner, including
the risks associated with short sales, hedging, option trading, trading on
margin and other leverage transactions. The investment strategy adopted by the
domestic funds managed by the Company, and any other funds it subsequently
invests, could result in substantial losses, and these losses could have a
material adverse impact on the operational results of the Company. Conversely,
if any partnership funds in which Company funds are invested prove to be
profitable, the partners thereof, including the Company, will be credited with
partnership net income. The Company will thereby incur income tax liability,
even if it receives little or no cash distributions from such funds. Since the
stated intention of the funds managed by the Company is to reinvest
substantially all income and gain allocable to the partners thereof, the Company
does not anticipate receiving distributions of cash from the funds to the
partners, including the Company, that could be used to pay any income tax on
partnership profits.
 
    It is the present intention of the Company to limit its investment in
certain designated assets, including investments in domestic partnership funds,
to an amount not exceeding forty-five percent in the aggregate, of the Company's
total assets, to avoid characterization of the Company as an investment company
that would be subject to regulation under the Investment Company Act of 1940.
 
                                USE OF PROCEEDS
 
    The Company will not receive any proceeds from the sale of the shares of
Common Stock offered by the Selling Securityholders pursuant to this Prospectus.
The Company will receive proceeds upon the exercise of warrants to purchase
shares of Common Stock held by certain of the Selling Securityholders. See
"Selling Securityholders."
 
                                       15
<PAGE>
                            SELLING SECURITYHOLDERS
 
   
    The shares of Common Stock offered pursuant to this Prospectus have been or
will be issued to the Selling Securityholders (or their assignees) directly by
the Company. An aggregate of 226,002 of the shares of Common Stock offered
pursuant to this Prospectus were issued by the Company to certain of the Selling
Securityholders in the 1997 Private Placement. An additional 226,002 of the
shares of Common Stock offered pursuant to this Prospectus (subject to
adjustment under certain circumstances) represent shares issuable to certain of
the Selling Securityholders upon exercise of the warrants issued in the 1997
Private Placement (the "1997 Warrants"). The 1997 Warrants may be redeemed by
the Company under certain circumstances. Another 403,413 shares of Common Stock
were issued by the Company to certain Selling Securityholders in a series of
independent, but related transactions to acquire additional equity ownership in
four of the Affiliates. See "Recent Developments." The remaining 30,050 shares
of Common Stock offered pursuant to this Prospectus (subject to adjustment)
represent shares issuable upon the exercise of certain options and other
warrants held by certain of the Selling Securityholders. The Company will not
receive any of the proceeds from sales of the shares of Common Stock offered
pursuant to this Prospectus, although the Company will receive the exercise
prices to be paid by the Selling Securityholders upon exercise of the 1997
Warrants and the options and other warrants held by such Selling Securityholders
and referenced in the footnotes to the table below. Such funds, when received by
the Company, will be used for general corporate purposes.
    
 
    The following table sets forth certain information with respect to the
beneficial ownership of shares of the Company's Common Stock by the Selling
Securityholders as of January 30, 1998 and the number of shares which may be
offered pursuant to this Prospectus for the account of each of the Selling
Securityholders or their transferees from time to time. Except as described in
the footnotes to the table, to the best of the Company's knowledge, none of the
Selling Securityholders has had any position, office or other material
relationship with the Company or any of its affiliates.
 
   
<TABLE>
<CAPTION>
                                        NUMBER OF SHARES                       NUMBER OF SHARES
                                          BENEFICIALLY       MAXIMUM NUMBER      BENEFICIALLY      PERCENT OF CLASS
                                              OWNED         OF SHARES WHICH          OWNED        BENEFICIALLY OWNED
                                            PRIOR TO         MAY BE SOLD IN        AFTER THE           AFTER THE
SELLING SECURITYHOLDERS                    OFFERING(1)      THIS OFFERING(1)      OFFERING(2)         OFFERING(2)
- --------------------------------------  -----------------  ------------------  -----------------  -------------------
<S>                                     <C>                <C>                 <C>                <C>
All Points Management Trust (3).......    124,907(4)          56,282              68,625(4)                1.68%
Bruce Barber..........................        187(5)             187(5)                0                      0
Ileana C. Basil.......................      6,400              3,400               3,000                      *
Douglas Benson........................     75,654             75,654                   0                      0
William D. Blake......................     10,000             10,000                   0                      0
Barry Booth...........................        187(6)             187(6)                0                      0
Gary W. & Patricia M. Boyett..........     40,700(7)          20,000              20,700(7)                   *
Steven Bronson........................      4,300(8)           4,300(8)                0                      0
Carolyn F. & Robert S. Burgess, JT....     14,000             14,000                   0                      0
Eugene A. Cafiero.....................     20,800              6,800              14,000                      *
Roy & Donna V. Caponi.................      6,700              6,600                 100                      *
Rene Carrel...........................      2,209              2,209                   0                      0
James Cassel..........................      2,619(9)           2,619(9)                0                      0
Phillip J. Chelsvig...................     18,000(10)          8,000              10,000(10)                  *
M. Robert & Phyllis Ching (11)(12)....    460,838(12)(13)    129,824(12)         331,014(12)(13)           7.98%
Philip & Beverly Ching................     10,676             10,676                   0                      0
Victor & Beverly Ching................      1,068              1,068                   0                      0
Tim & Francis Lorraine Christy........      4,000              4,000                   0                      0
C. Perry Chu..........................      1,068              1,068                   0                      0
Irene Davenport Trust.................     20,000             20,000                   0                      0
</TABLE>
    
 
                                       16
<PAGE>
   
<TABLE>
<CAPTION>
                                        NUMBER OF SHARES                       NUMBER OF SHARES
                                          BENEFICIALLY       MAXIMUM NUMBER      BENEFICIALLY      PERCENT OF CLASS
                                              OWNED         OF SHARES WHICH          OWNED        BENEFICIALLY OWNED
                                            PRIOR TO         MAY BE SOLD IN        AFTER THE           AFTER THE
SELLING SECURITYHOLDERS                    OFFERING(1)      THIS OFFERING(1)      OFFERING(2)         OFFERING(2)
- --------------------------------------  -----------------  ------------------  -----------------  -------------------
<S>                                     <C>                <C>                 <C>                <C>
Diamond Marketing (14)................        870(14)            870(14)               0
John D. Drake.........................    192,360(15)         52,360             140,000(15)               3.44
John F. Eades.........................      3,400              3,400                   0                      0
Eric Elliot...........................      1,037(16)          1,037(16)               0                      0
Gerald E. Finnell & Katherine E.
  Finnell Living Trust................     17,800(17)          6,800              11,000(17)                  *
Fred F. Finocchiaro (18)..............     60,500(19)(20)     14,000(20)          46,500(19)               1.14%
First Associated Securities (21)......      2,750(21)          2,750(21)               0                      0
First Global Securities (22)(23)......     10,060(22)(23)      6,060(23)           4,000(22)                  *
Forbank & Co..........................     30,626             30,626                   0                      0
Gary Freeman (24).....................     97,937(24)(25)     22,937(24)          75,000(24)(25)           1.84%
Arthur R. & Judith E. Giese Revocable
  Trust...............................      8,000              8,000                   0                      0
Global Benchmarks Arbitrage Fund,
  L.P.................................     26,000             26,000                   0                      0
Dean Hall.............................      4,000              4,000                   0                      0
Harry E. Judson Living Trust..........      2,600              2,600                   0                      0
Kevin Kennelly........................     55,000             55,000                   0                      0
Norio D. Kotani.......................     14,000              4,000              10,000                      *
David C. Kuplec.......................     16,800              6,800              10,000                      *
David Lackey (26)(28).................    110,895(27)          6,625(28)         104,270(27)               2.56%
Calvin Layland Pension & Profit
  Plan................................      9,338(29)          5,338               4,000(29)                  *
Calvin Layland........................     20,968(30)          8,968              12,000(30)                  *
Laredo Trading Co.....................        990                990                   0                      0
Daniel & Shelly S. Lodes..............     11,384             11,384                   0                      0
Scott & Joan Lovely...................      3,099              3,099                   0                      0
Gary A. Ludi..........................      5,000              4,000               1,000                      *
William J. Mallory....................      6,800              6,800                   0                      0
Meespierson (Isle of Man) Nominees
  Ltd.................................      6,800              6,800                   0                      0
James A. Merkle (31)..................     17,560             10,000               7,560                      *
Neil Montagino........................      6,800              6,800                   0                      0
William M. Moon.......................      9,075              9,075                   0                      0
Dominic Mortellaro....................     15,000(32)          4,000              11,000(32)                  *
David W. Moyer........................     46,500             20,000              26,500                      *
Shan A. Nathan........................      4,400              3,400               1,000                      *
Northlea Partners Ltd.................     26,000(33)          4,000              22,000(33)                  *
Douglas B. Odell......................      8,300              6,800               1,500                      *
Edward D. Pollock.....................     23,850(34)          6,800              17,050(34)                  *
Roger L. Porter.......................      7,380              3,400               3,980                      *
Rhoda I. Rich.........................      4,000              4,000                   0                      0
Joseph P. Richardson..................     16,000              8,000               8,000                      *
Gilbert E. Rivera.....................     18,000(35)          6,000              12,000(35)                  *
Jose Robles...........................     24,000             20,000               4,000                      *
Alan Rosen............................      6,800              6,800                   0                      0
Paul R. Ryan (36).....................    161,000(37)          3,000             158,000(37)               3.77%
Scott Salpeter........................         85(38)             85(38)               0                      0
</TABLE>
    
 
   
                                       17
    
<PAGE>
   
<TABLE>
<CAPTION>
                                        NUMBER OF SHARES                       NUMBER OF SHARES
                                          BENEFICIALLY       MAXIMUM NUMBER      BENEFICIALLY      PERCENT OF CLASS
                                              OWNED         OF SHARES WHICH          OWNED        BENEFICIALLY OWNED
                                            PRIOR TO         MAY BE SOLD IN        AFTER THE           AFTER THE
SELLING SECURITYHOLDERS                    OFFERING(1)      THIS OFFERING(1)      OFFERING(2)         OFFERING(2)
- --------------------------------------  -----------------  ------------------  -----------------  -------------------
<S>                                     <C>                <C>                 <C>                <C>
John Saunders.........................      3,400              3,400                   0                      0
William D. Sears......................      4,000              4,000                   0                      0
Sigler & Co...........................     14,852             14,852                   0                      0
Fred Jr. & Patricia Fittro Sohegian...      4,000              4,000                   0                      0
Barry Steiner.........................         85(39)             85(39)               0                      0
Stewart, Thomas (40)(41)..............      6,850(41)            800(42)           6,050(41)                  *
Wendell L. Strahan....................     41,800              6,800              35,000                      *
Gary's Market Profit Sharing Plan.....      6,000              3,000               3,000                      *
Gary L. & Barbara I. Thomas...........      4,500              4,000                 500                      *
Trendsgroup Financial (43)............      7,570(43)          7,570(43)               0                      0
Joseph and Diane Tsai (44)............      1,282(44)          1,282(44)               0                      0
Donald J. Waechter....................      5,300              3,400               1,900                      *
David Walters.........................      6,950              3,400               3,550                      *
Michael W. Wells......................     16,000             16,000                   0                      0
James A. & Betty A. Wenker Trust......      6,600              6,600                   0                      0
Daniel Zuckerman......................      6,000              6,000                   0                      0
                                                             -------
  Total:..............................                       885,467 Shares
</TABLE>
    
 
- ------------------------
 
*   Less than one percent of class.
 
(1) Assumes exercise of all 1997 Warrants and all options and other warrants
    beneficially owned by the Selling Securityholder at the exercise price and
    for the maximum number of shares permitted as of the date of this
    Prospectus. Share figures include shares of Common Stock issued in the 1997
    Private Placement and underlying the 1997 Warrants as follows:
 
   
<TABLE>
<CAPTION>
                                                              Shares of Common
                                                            Stock Issued in 1997    Shares Underlying
Selling Securityholders                                       Private Placement         Warrants
- ----------------------------------------------------------  ---------------------  -------------------
<S>                                                         <C>                    <C>
All Points Management Trust...............................                0                     0
Bruce Barber..............................................                0                     0
Ileana C. Basil...........................................            1,700                 1,700
Douglas Benson............................................                0                     0
William D. Blake..........................................            5,000                 5,000
Barry Booth...............................................                0                     0
Gary W. & Patricia M. Boyett..............................           10,000                10,000
Steven Bronson............................................                0                     0
Carolyn F. & Robert S. Burgess, JT........................            7,000                 7,000
Eugene A. Cafiero.........................................            3,400                 3,400
Roy & Donna V. Caponi.....................................            3,300                 3,300
Rene Carrel...............................................                0                     0
James Cassel..............................................                0                     0
Phillip J. Chelsvig.......................................            4,000                 4,000
M. Robert & Phyllis Ching.................................           15,000                15,000
Philip & Beverly Ching....................................                0                     0
Victor Ching..............................................                0                     0
Tim & Francis Lorraine Christy............................            2,000                 2,000
C. Perry Chu..............................................                0                     0
Irene Davenport Trust.....................................           10,000                10,000
Diamond Marketing.........................................                0                     0
John D. Drake.............................................                0                     0
</TABLE>
    
 
                                       18
<PAGE>
   
<TABLE>
<CAPTION>
                                                              Shares of Common
                                                            Stock Issued in 1997    Shares Underlying
Selling Securityholders                                       Private Placement         Warrants
- ----------------------------------------------------------  ---------------------  -------------------
<S>                                                         <C>                    <C>
John F. Eades.............................................            1,700                 1,700
Eric Elliot...............................................                0                     0
Gerald E. Finnell & Katherin E. Finnell Living Trust......            3,400                 3,400
Fred F. Finocchiaro.......................................            6,000                 6,000
First Associates Securities...............................                0                     0
First Global Securities...................................                0                     0
Forbank...................................................                0                     0
Gary Freeman..............................................                0                     0
Arthur R. & Judith E. Giese Revocable Trust...............            4,000                 4,000
Global Benchmarks Arbitrage Fund, L.P.....................           13,000                13,000
Dean Hall.................................................            2,000                 2,000
Harry E. Judson Living Trust..............................            1,300                 1,300
Kevin Kennelly............................................           27,500                27,500
Norio D. Kotani...........................................            2,000                 2,000
David C. Kuplec...........................................            3,400                 3,400
David Lackey..............................................                0                     0
Laredo Trading............................................                0                     0
Calvin Layland Pension & Profit Plan......................                0                     0
Calvin Layland............................................                0                     0
Daniel & Shelly S. Lodes..................................            4,702                 4,702
Scott & Joan Lovely.......................................                0                     0
Gary A. Ludi..............................................            2,000                 2,000
William J. Mallory........................................            3,400                 3,400
Meespierson (Isle of Man) Nominees Ltd....................            3,400                 3,400
James A. Merkle...........................................            5,000                 5,000
Neil Montagino............................................            3,400                 3,400
William M. Moon...........................................                0                     0
Dominic Mortellaro........................................            2,000                 2,000
David W. Moyer............................................           10,000                10,000
Shan A. Nathan............................................            1,700                 1,700
Northlea Partners Ltd.....................................            2,000                 2,000
Douglas B. Odell..........................................            3,400                 3,400
Edward D. Pollock.........................................            3,400                 3,400
Roger L. Porter...........................................            1,700                 1,700
Rhoda I. Rich.............................................            2,000                 2,000
Joseph P. Richardson......................................            4,000                 4,000
Gilbert E. Rivera.........................................            3,000                 3,000
Jose Robles...............................................           10,000                10,000
Alan Rosen................................................            3,400                 3,400
Paul R. Ryan..............................................            1,500                 1,500
Scott Salpeter............................................                0                     0
John Saunders.............................................            1,700                 1,700
William D. Sears..........................................            2,000                 2,000
Sigler & Co...............................................                0                     0
Fred Jr. & Patricia Fittro Sohegian.......................            2,000                 2,000
Barry Steiner.............................................                0                     0
Stewart, Thomas...........................................                0                     0
Wendell L. Strahan........................................            3,400                 3,400
Gary's Market Profit Sharing Plan.........................            1,500                 1,500
Gary L. & Barbara I. Thomas...............................            2,000                 2,000
Trendsgroup Financial.....................................                0                     0
Joseph and Diane Tsai.....................................                0                     0
Dierdre Tsai..............................................                0                     0
Jared Tsai................................................                0                     0
Donald J. Waechter........................................            1,700                 1,700
David Walters.............................................            1,700                 1,700
Michael W. Wells..........................................            8,000                 8,000
James A. & Betty A. Wenker Trust..........................            3,300                 3,300
</TABLE>
    
 
   
                                       19
    
<PAGE>
<TABLE>
<CAPTION>
                                                              Shares of Common
                                                            Stock Issued in 1997    Shares Underlying
Selling Securityholders                                       Private Placement         Warrants
- ----------------------------------------------------------  ---------------------  -------------------
<S>                                                         <C>                    <C>
Daniel Zuckerman..........................................            3,000                 3,000
</TABLE>
 
   
 (2) Assumes the each Selling Securityholder will sell all of the shares of
     Common Stock offered pursuant to this Prospectus, but not any other shares
     of Common Stock beneficially owned by such Securityholder.
    
 
   
 (3) All Points Management Trust provides consulting services to the Company.
    
 
   
 (4) Includes 2,225 shares which are subject to options exercisable at a price
     of $4.40 per share, expiring August 31, 1999.
    
 
   
 (5) Includes warrants to purchase 187 shares at a price of $6.75 per share,
     expiring November 28, 2001.
    
 
   
 (6) Includes warrants to purchase 187 shares at a price of $6.75 per share,
     expiring November 28, 2001.
    
 
   
 (7) Includes warrants to purchase 10,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
 (8) Includes warrants to purchase 4,300 shares at a price of $6.75 per share,
     expiring November 28, 2001.
    
 
   
 (9) Includes warrants to purchase 2,619 shares at a price of $6.75 per share,
     expiring November 28, 2001.
    
 
   
(10) Includes warrants to purchase 5,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(11) Dr. Ching has provided consulting services to the Company.
    
 
   
(12) Includes shares beneficially owned by Dr. Ching issued in the names of M.
     Robert & Phyllis Ching, M. Robert & Phyllis Ching Living Trust, Phyllis
     Ching, M. Robert Ching MD, Inc. Money Purchase Plan, M. Robert Ching MD
     Inc. Defined Benefit Plan, Phyllis and Bradley Ching, Phyllis and Brent
     Ching, and Phyllis and Brian Ching.
    
 
   
(13) Includes shares which are subject to options as follows: (a) 20,000 shares,
     at an exercise price of $1.50 per share, expiring March 21, 1999; (b)
     30,000 shares, at an exercise price of $2.50 per share, expiring August 31,
     1999; (c) 5,000 shares, at an exercise price of $5.25 per share, expiring
     October 13, 2000; (d) 5,000 shares at an exercise price of $5.25 per share,
     expiring October 13, 2000; (e) 1,775 shares at an exercise price of $5.50
     per share, expiring January 29, 2001; and (f) 3,750 shares, at an exercise
     price of $7.00 per share, expiring August 8, 2001. Also includes warrants
     to purchase 40,000 shares at a price of $7.50 per share, expiring June 8,
     2000, issued as part of units purchased in the June Private Placement.
    
 
   
(14) Includes warrants to purchase 870 shares at a price of $8.25 per share,
     expiring November 30, 2000. These warrants were issued as "finders
     warrants" in connection with the 1997 Private Placement. See "Recent
     Developments."
    
 
   
(15) Includes warrants to purchase 20,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(16) Includes warrants to purchase 1,037 shares at a price of $6.75 per share,
     expiring November 28, 2001.
    
 
   
(17) Includes warrants to purchase 5,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(18) Mr. Finocchiaro is a principal in the accounting firm of Finocchiaro & Co.,
     which served as independent auditors of the Company until April 1997.
    
 
                                       20
<PAGE>
   
(19) Includes warrants to purchase 5,500 shares at a price of $5.50 per share,
     expiring on June 8, 2000, issued as "finders warrants" in connection with
     the June Private Placement and warrants to purchase 20,500 shares at a
     price of $7.50 per share, expiring June 8, 2000, issued as part of units
     purchased in the June Private Placement.
    
 
   
(20) Includes warrants to purchase 2,000 shares at a price per share of $8.25
     per share, expiring November 30, 2000. These warrants were issued as
     "finders warrants." See "Recent Developments."
    
 
   
(21) First Associated Securities acted as a finder in connection with the 1997
     Private Placement and, in such capacity, received "finders warrants" to
     purchase the 2,750 shares reflected in the table at a price of $8.25 per
     share. These warrants expire on November 30, 2000. See "Recent
     Developments."
    
 
   
(22) First Global Securities acted as a finder in connection with the June
     Private Placement and, in such capacity, received "finders warrants" to
     purchase the 4,000 shares at a price of $5.50 per share. These warrants
     expire on June 8, 2000.
    
 
   
(23) First Global Securities acted as a finder in connection with the 1997
     Private Placement and, in such capacity, received "finders warrants" to
     purchase the 6,060 shares reflected in the table at a price of $8.25 per
     share. These warrants expire on November 30, 2000. See "Recent
     Developments."
    
 
   
(24) Includes shares beneficially owned by Mr. Freeman issued in the names of
     Bernard Freeman Trust, Heidi Freeman, and Benjamin Freeman.
    
 
   
(25) Includes shares which are subject to options as follows: (a) 2,000 shares,
     exercisable at a price of $2.50 per share, expiring March 29, 1999, in the
     name of Benjamin Freeman; (b) 4,000 shares, exercisable at a price of $2.50
     per share, expiring March 29, 1999, in the name of Gordon Freeman; (c)
     2,000 shares, exercisable at a price of $2.50 per share, expiring March 29,
     1999, in the name of Heidi Freeman; and (d) 4,000 shares, exercisable at a
     price of $2.50 per share, expiring March 29, 1999, in the name of Marc
     Freeman.
    
 
   
(26) Mr. Lackey provides consulting services to the Company. Mr. Lackey also
     acted as a finder in connection with the June Private Placement and the
     1997 Private Placement. See "Recent Developments."
    
 
   
(27) Mr. Lackey acted as a finder in connection with the June Private Placement
     and, in such capacity, received "finders warrants" to purchase the 4,000
     shares at a price of $5.50 per share. These warrants expire on June 8,
     2000.
    
 
   
(28) Mr. Lackey acted as a finder in connection with the 1997 Private Placement
     and, in such capacity, received "finders warrants" to purchase the 1,500
     shares reflected in the table at a price of $8.25 per share. These warrants
     expire on November 30, 2000. See "Recent Developments."
    
 
   
(29) Includes warrants to purchase 2,000 shares at a price at $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(30) Includes warrants to purchase 2,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(31) James A. Merkle is the father of James A. Merkle, Jr., president of
     MerkWerks Corporation.
    
 
   
(32) Includes warrants to purchase 5,000 shares at a price at $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(33) Includes warrants to purchase 10,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(34) Includes warrants to purchase 5,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
                                       21
<PAGE>
   
(35) Includes warrants to purchase 5,000 shares at a price of $7.50 per share,
     expiring June 8, 2000. These warrants were issued as part of units
     purchased in the June Private Placement.
    
 
   
(36) Mr. Ryan is a director and serves as the President and Chief Executive
     Officer of the Company. Mr. Ryan is also a party to an agreement with the
     Company pursuant to which the Company and Mr. Ryan have agreed to act as
     the general partners of certain private investment funds and co-managers to
     other investment funds. Under this agreement, the Company is entitled to
     receive 75 percent, and Mr. Ryan is entitled to receive 25 percent, of the
     performance and management fees earned in respect of the investment
     advisory services provided to co-managed investment funds, less certain
     expenses shared with other parties. Pursuant to this agreement, Mr. Ryan
     earned approximately $14,000 during fiscal year 1996.
    
 
   
(37) Includes 100,000 shares which are subject to warrants, exercisable at a
     price of $2.00 per share, expiring January 1, 2000 and warrants to purchase
     2,000 shares at a price of $7.50 per share, expiring June 8, 2000, that
     were issued as part of units purchased in the June Private Placement. Also
     includes 50,000 shares which are subject to options, exercisable at a price
     of $6.10 per share, expiring March 10, 2001.
    
 
   
(38) Includes warrants to purchase 85 shares at a price of $6.75 per share,
     expiring November 28, 2001.
    
 
   
(39) Includes warrants to purchase 85 shares at a price of $6.75 per share,
     expiring November 28, 2001.
    
 
   
(40) Thomas Stewart acted as a finder in connection with the June Private
     Placement and 1997 Private Placement. See "Recent Developments." Thomas
     Stewart is the son of R. Bruce Stewart, Chairman and Chief Financial
     Officer of the Company.
    
 
   
(41) Includes "finder warrants" to purchase 2,050 shares at a price of $5.50 per
     share which were issued in connection with the June Private Placement and
     expire on June 8, 2000.
    
 
   
(42) Includes "finder warrants" to purchase 800 shares at a price of $8.25 per
     share, issued in connection with the 1997 Private Placement. See "Recent
     Developments."
    
 
   
(43) Trendsgroup Financial acted as a finder in connection with the 1997 Private
     Placement and, in such capacity, received "finders warrants" to purchase
     the 7,570 shares reflected in the table at a price of $8.25 per share.
     These warrants expire on November 30, 2000. See "Recent Developments."
    
 
   
(44) Includes shares issued in the names of Mr. & Mrs. Tsai's children.
    
 
                                       22
<PAGE>
                              PLAN OF DISTRIBUTION
 
   
    The shares of Common Stock offered hereby may be sold by the Selling
Securityholders or by their respective pledgees, donees, transferees or other
successors in interest. Such sales may be made at fixed prices that may be
changed, at market prices prevailing at the time of sale, at prices related to
such prevailing market prices, or at negotiated prices. The shares may be sold
by one or more of the following: (a) one or more block trades in which a broker
or dealer so engaged will attempt to sell all or a portion of the shares held by
the Selling Securityholders as agent but may position and resell a portion of
the block as principal to facilitate the transaction; (b) purchase by a broker
or dealer as principal and resale by such broker or dealer as principal and
resale by such broker or dealer for its account pursuant to this Prospectus; (c)
ordinary brokerage transactions and transactions in which the broker solicits
purchasers; and (d) privately negotiated transactions between the Selling
Securityholders and purchasers without a broker-dealer. The Selling
Securityholders may effect such transactions by selling shares to or through
broker-dealers, and such broker-dealers will receive compensation in negotiated
amounts in the form of discounts, concessions, commissions or fees from the
Selling Securityholders and/or the purchasers of the shares for whom such
broker-dealers may act as agent or to whom they sell as principal, or both
(which compensation to a particular broker-dealer might be in excess of
customary commissions). Such brokers or dealers or other participating brokers
or dealers and the Selling Securityholders may be deemed to be "underwriters"
within the meaning of the Securities Act, in connection with such sales. Except
for customary selling commissions in ordinary brokerage transactions, any such
underwriter or agent will be identified, and any compensation paid to such
persons will be described, in a Prospectus Supplement. In addition, any
securities covered by this Prospectus that qualify for sale pursuant to Rule 144
might be sold under Rule 144 rather than pursuant to this Prospectus.
    
 
                                 LEGAL MATTERS
 
    The validity of the shares of Common Stock intended to be sold pursuant to
this Prospectus will be passed upon for the Company by O'Melveny & Myers LLP.
 
                                    EXPERTS
 
    The financial statements incorporated in this Prospectus by reference to the
Annual Report on Form 10-K for the year ended December 31, 1996 have been so
included in reliance on the report of Finocchiaro & Co., independent
accountants, given on the authority of said firm as experts in auditing and
accounting. Fred F. Finocchiaro, a principal of Finocchiaro & Co., beneficially
owns 26,500 shares of the Company's Common Stock and warrants to purchase 6,000
shares of Common Stock at $10.00 per share, 2,000 shares of Common Stock at
$8.25 per share, 20,500 shares of Common Stock at $7.50 per share, and 5,500
shares of Common Stock at $5.50 per share. Certain warrants exercisable at $8.25
per share and $5.50 per share were issued as "finders warrants." The shares and
warrants beneficially owned by Mr. Finocchiaro were issued in connection with
the June Private Placement and the 1997 Private Placement. See "Recent
Developments." Mr. Finocchiaro is one of the Selling Securityholders named in
this Prospectus.
 
                                       23
<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
    NO DEALER, SALESPERSON OR OTHER INDIVIDUAL HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED OR
INCORPORATED BY REFERENCE IN THIS PROSPECTUS IN CONNECTION WITH THE OFFER
CONTAINED HEREIN AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST
NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY OR THE SELLING
SECURITYHOLDERS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A
SOLICITATION OF ANY OFFER TO BUY ANY SECURITIES IN ANY JURISDICTION IN WHICH
SUCH OFFER OR SOLICITATION WOULD BE UNLAWFUL. NEITHER THE DELIVERY OF THIS
PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL UNDER ANY CIRCUMSTANCES CREATE ANY
IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE COMPANY SINCE
THE DATE HEREOF.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Available Information.....................................................    2
 
Incorporation of Certain Documents by Reference...........................    2
 
The Company...............................................................    4
 
Recent Developments.......................................................    6
 
Forward-Looking Statements................................................    7
 
Risk Factors..............................................................    8
 
Use of Proceeds...........................................................   15
 
Selling Securityholders...................................................   16
 
Plan of Distribution......................................................   23
 
Legal Matters.............................................................   23
 
Experts...................................................................   23
</TABLE>
 
                                ACACIA RESEARCH
                                  CORPORATION
 
   
                               885,467 SHARES OF
    
 
                                  COMMON STOCK
 
                             ---------------------
 
                                   PROSPECTUS
 
                             ---------------------
 
                                          , 1998
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                                    PART II
                   INFORMATION NOT REQUIRED IN THE PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
    The expenses in connection with the registration and sale of the Selling
Securityholder Securities are as follows:
 
   
<TABLE>
<S>                                                                  <C>
SEC registration fee...............................................  $   2,252
Printing and engraving.............................................      2,000
Accounting fees and expenses.......................................      1,000
Legal fees and expenses............................................     10,000
Miscellaneous expenses.............................................      5,000
                                                                     ---------
    Total..........................................................  $  20,252
                                                                     ---------
                                                                     ---------
</TABLE>
    
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
   
    The Bylaws of the Company, as amended to date, requires the Company to
indemnify its officers and directors to the fullest extent permitted by Section
317 of the California Corporations Code and applicable law. Section 317 provides
for the indemnification of officers, directors and other corporate agents in
terms sufficiently broad to indemnify such persons, under certain circumstances,
for liabilities (including reimbursement of expenses incurred) arising under the
Securities Act.
    
 
ITEM 16. EXHIBITS
 
   
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER                                                DESCRIPTION
- -----------  --------------------------------------------------------------------------------------------------
<C>          <S>
       4.1   Form of Common Stock Warrant Agreement issued as part of the 1997 Private Placement
 
       4.2   Form of Specimen Certificate of Company's Common Stock(1)
 
       5.1   Opinion of Counsel regarding legality of securities being registered
 
      10.1   Form of Common Stock Purchase Agreement(2)
 
      23.1   Consent of Independent Auditors
 
      23.2   Consent of Counsel (included in Exhibit 5.1)
 
      24.1   Powers of Attorney(3)
</TABLE>
    
 
- ------------------------
 
   
(1) Previously filed as an exhibit to the Company's Registration Statement on
    Form SB-2, File No. SB2-33-87368-L.A., and incorporated by reference.
    
 
   
(2) Incorporated by reference from the Company's current report on Form 8-K,
    event date January 27, 1998.
    
 
   
(3) Previously filed as an exhibit to the Company's initial Registration
    Statement on Form S-3 filed with the Commission on February 2, 1998. (File
    No. 333-45397).
    
 
                                      II-1
<PAGE>
ITEM 17. UNDERTAKINGS
 
    The undersigned registrant hereby undertakes:
 
    (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:
 
        (i) To include any prospectus required by Section 10(a)(3) of the
    Securities Act.
 
        (ii) To reflect in the prospectus any facts or events arising after the
    effective date of the registration statement (or the most recent
    post-effective amendment thereof) which, individually or in the aggregate,
    represent a fundamental change in the information set forth in the
    registration statement. Notwithstanding the foregoing, any increase or
    decrease in volume of securities offered (if the total dollar value of
    securities offered would not exceed that which was registered) and any
    deviation from the low or high and of the estimated maximum offering range
    may be reflected in the form of prospectus filed with the Commission
    pursuant to Rule 424(b) if, in the aggregate, the changes in volume and
    price represent no more than 20 percent change in the maximum aggregate
    offering price set forth in the "Calculation of Registration Fee" table in
    the effective registration statement.
 
       (iii) To include any material information with respect to the plan of
    distribution not previously disclosed in the registration statement or any
    material change to such information in the registration statement.
 
   
PROVIDED, HOWEVER, that paragraphs (1)(i) and (1)(ii) above do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the registrant pursuant to
Section 13 or Section 15(d) of the Exchange Act that are incorporated by
reference in the Registration Statement.
    
 
    (2) That, for the purpose of determining any liability under the Securities
Act, each such post-effective amendment shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial BONA FIDE offering
thereof.
 
    (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.
 
    (4) That, for purposes of determining any liability under the Securities
Act, each filing of the registrant's annual report pursuant to Section 13(a) or
15(d) of the Exchange Act (and, where applicable, each filing of an employee
benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that
is incorporated by reference in the registration statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial BONA
FIDE offering thereof.
 
    (5) That, for purposes of determining any liability under the Securities
Act, the information omitted from the form of prospectus filed as part of this
registration statement in reliance upon Rule 430A and contained in a form of
prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this registration
statement as of the time it was declared effective.
 
    (6) That, for the purpose of determining any liability under the Securities
Act, each post-effective amendment that contains a form of prospectus shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial BONA FIDE offering thereof.
 
    (7) Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
registrant pursuant to the provisions described in Item 6
 
                                      II-2
<PAGE>
   
above, or otherwise, the registrant has been advised that in the opinion of the
Commission such indemnification is against public policy as expressed in the
Securities 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 Securities
Act and will be governed by the final adjudication of such issue.
    
 
                                      II-3
<PAGE>
                                   SIGNATURES
 
   
    Pursuant to the requirements of the Securities Act, the registrant certifies
that it has reasonable grounds to believe that it meets all the requirements for
filing on Form S-3 and has duly caused this Amendment No. 1 to the Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Pasadena, State of California, on February 12, 1998.
    
 
<TABLE>
<S>                             <C>  <C>
                                ACACIA RESEARCH CORPORATION
 
                                By                /s/ PAUL R. RYAN
                                     -----------------------------------------
                                                    Paul R. Ryan
                                       PRESIDENT AND CHIEF EXECUTIVE OFFICER
</TABLE>
 
   
    Pursuant to the requirements of the Securities Act, this registration
statement has been signed by the following persons in the capacities and on the
dates indicated.
    
 
   
<TABLE>
<CAPTION>
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
 
<C>                             <S>                         <C>
                                President, Chief Executive
       /s/ PAUL R. RYAN           Officer and Director
- ------------------------------    (Principal Executive       February 12, 1998
         Paul R. Ryan             Officer)
 
                                Chief Financial Officer
              *                   and Chairman of the
- ------------------------------    Board (Principal           February 12, 1998
       R. Bruce Stewart           Financial and Accounting
                                  Officer)
 
              *
- ------------------------------  Director                     February 12, 1998
      Brooke P. Anderson
 
              *
- ------------------------------  Director                     February 12, 1998
       Fred A. de Boom
 
              *
- ------------------------------  Director                     February 12, 1998
      Edward W. Frykman
</TABLE>
    
 
   
*By:      /s/ PAUL R. RYAN
      -------------------------
            Paul R. Ryan,
          ATTORNEY-IN-FACT
    
 
                                      II-4
<PAGE>
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER                                                DESCRIPTION
- -----------  --------------------------------------------------------------------------------------------------
<C>          <S>
       4.1   Form of Common Stock Warrant Agreement issued as part of the 1997 Private Placement
 
       4.2   Form of Specimen Certificate of Company's Common Stock(1)
 
       5.1   Opinion of Counsel regarding legality of securities being registered
 
      10.1   Form of Common Stock Purchase Agreement(2)
 
      23.1   Consent of Independent Auditors
 
      23.2   Consent of Counsel (included in Exhibit 5.1)
 
      24.1   Powers of Attorney(3)
</TABLE>
    
 
- ------------------------
 
   
(1) Previously filed as an exhibit to the Company's Registration Statement on
    Form SB-2, File No. SB2-33-87368-L.A., and incorporated by reference.
    
 
   
(2) Incorporated by reference from the Company's current report on Form 8-K,
    event date January 27, 1998.
    
 
   
(3) Previously filed as an exhibit to the Company's initial Registration
    Statement on Form S-3 filed with the Commission on February 2, 1998. (File
    No. 333-45397).
    

<PAGE>
                                                                     EXHIBIT 4.1
 
                     FORM OF COMMON STOCK PURCHASE WARRANT
 
    THIS SECURITY AND ANY SHARES ISSUED UPON EXERCISE OF THIS SECURITY HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), OR
APPLICABLE STATE SECURITIES LAWS AND MAY NOT BE TRANSFERRED OR OTHERWISE
DISPOSED OF UNLESS THE APPLICABLE SECURITY HAS BEEN REGISTERED UNDER THE ACT AND
SUCH LAWS OR (1) REGISTRATION UNDER SUCH LAWS IS NOT REQUIRED AND (2) AN OPINION
OF COUNSEL SATISFACTORY TO THE COMPANY IS FURNISHED TO THE COMPANY TO THE EFFECT
THAT REGISTRATION UNDER THE ACT AND THE APPLICABLE STATE SECURITIES LAWS IS NOT
REQUIRED.
 
ACACIA RESEARCH CORPORATION
 
                        WARRANT TO PURCHASE COMMON STOCK
 
    This certifies that, for value received,                     ("the Holder")
is entitled to subscribe for and purchase up to [   ] shares (subject to
adjustment from time to time pursuant to the provisions of Section 5 hereof) of
fully paid and nonassessable Common Stock of Acacia Research Corporation, a
California corporation (the "Company"), at the price specified in Section 2
hereof, as such price may be adjusted from time to time pursuant to Section 5
hereof (the "Warrant Price"), subject to the provisions and upon the terms and
conditions hereinafter set forth.
 
    As used herein, the term "Common Stock" shall mean the Company's presently
authorized Common Stock, no par value, and any stock into or for which such
Common Stock may hereafter be converted or exchanged.
 
    This Warrant is issued pursuant to that certain Subscription Agreement
between the Holder and the Company dated December 1, 1997.
 
    1.  TERM OF WARRANT; CALLABILITY BY COMPANY.
 
    The purchase right represented by this Warrant is exercisable, in whole or
in part, at any time during a period beginning on the date hereof and ending
November 30, 2000. However, during the three-year period, the Company will have
the right to redeem all of the Warrants on 30 days prior written notice at a
redemption price of $0.01 per Warrant if the closing bid price of the Company's
Common Stock averages $15.00 or above for 20 consecutive trading days after the
Common Stock reaches a closing bid price of at least $15.00 on the Nasdaq
National Market System. If the Company elects to exercise its redemption right,
the Holder of this Warrant may either exercise the Warrant, in whole or in part,
or tender the Warrant to the Company for redemption, in whole or in part. Within
five business days after the end of the 30-day period, the Company will mail a
check for the redemption price to the Holder of this Warrant should this Warrant
remain outstanding in whole or in part as of the end of the 30-day period,
whether or not the Holder has surrendered this Warrant for redemption. This
Warrant may not be exercised after the end of such 30-day period.
 
    2.  WARRANT PRICE.
 
    The Warrant Price is $10.00 per share, subject to adjustment from time to
time pursuant to the provisions of Section 5 hereof.
 
    3.  METHOD OF EXERCISE; PAYMENT; ISSUANCE OF NEW WARRANT.
 
    Subject to Section 1 hereof, the purchase right represented by this Warrant
may be exercised by the Holder, in whole or in part, by the surrender of this
Warrant (with the notice of exercise form attached
 
                                       1
<PAGE>
hereto as EXHIBIT 1 duly executed) at the principal office of the Company and by
the payment to the Company, by cashier's check or wire transfer, of an amount
equal to the then applicable Warrant Price per share multiplied by the number of
shares then being purchased. The Company agrees that the shares so purchased
shall be deemed to be issued to the Holder as the record owner of such shares as
of the close of business on the date on which this Warrant shall have been
surrendered and payment made for such shares as aforesaid. In the event of any
exercise of the rights represented by this Warrant, certificates for the shares
of stock so purchased shall be delivered to the Holder within 15 days thereafter
and, unless this Warrant has been fully exercised or expired, a new Warrant
representing the portion of the shares, if any, with respect to which this
Warrant shall not then have been exercised, shall also be issued to the Holder
within such 15 day period.
 
    4.  STOCK FULLY PAID; RESERVATION OF SHARES.
 
    All Common Stock which may be issued upon the exercise of the rights
represented by this Warrant will, upon issuance, be fully paid and
nonassessable, and free from all taxes, liens and charges with respect to the
issue thereof. During the period within which the rights represented by this
Warrant may be exercised, the Company will at all times have authorized, and
reserved for the purpose of the issuance upon exercise of the purchase rights
evidenced by this Warrant, a sufficient number of shares of its Common Stock to
provide for the exercise of the rights represented by this Warrant.
 
    5.  ADJUSTMENT OF PURCHASE PRICE AND NUMBER OF SHARES.
 
    The kind of securities purchasable upon the exercise of this Warrant, the
Warrant Price and the number of shares purchasable upon exercise of this Warrant
shall be subject to adjustment from time to time upon the occurrence of the
following events:
 
        (a) RECLASSIFICATION, CONSOLIDATION OR MERGER.  In case of any
    reclassification or change of outstanding securities of the class issuable
    upon exercise of this Warrant (other than a change in par value, or from par
    value to no par value, or from no par value to par value, or as a result of
    a subdivision or combination), or in case of any consolidation or merger of
    the Company with or into another corporation, other than a merger with
    another corporation in which the Company is a continuing corporation and
    which does not result in any reclassification or change of outstanding
    securities issuable upon exercise of this Warrant, the Company, or such
    successor, as the case may be, shall execute a new Warrant, providing that
    the Holder of this Warrant shall have the right to exercise such new Warrant
    and procure upon such exercise, in lieu of each share of Common Stock
    theretofore issuable upon exercise of this Warrant, the kind and amount of
    shares of stock, other securities, money and property receivable upon such
    reclassification, change, consolidation, or merger by a Holder of one share
    of Common Stock. Such new Warrant shall provide for adjustments which shall
    be as nearly equivalent as may be practicable to the adjustments provided
    for in this Section 5. The provisions of this subparagraph (a) shall
    similarly apply to successive reclassification, changes, consolidations and
    mergers.
 
        (b) SUBDIVISION OR COMBINATION OF SHARES.  If the Company at any time
    while this Warrant remains outstanding and unexpired shall subdivide or
    combine its Common Stock, or distribute dividends on its Common Stock
    payable in Common Stock, the Warrant Price shall be proportionately
    decreased in the case of a subdivision or increased in the case of a
    combination or dividend.
 
        (c) ADJUSTMENT OF NUMBER OF SHARES.  Upon each adjustment in the Warrant
    Price pursuant to any of subparagraphs (a)-(c) of this Section 5, the number
    of shares of Common Stock purchasable hereunder shall be adjusted, to the
    nearest whole share, to the product obtained by multiplying the number of
    shares purchasable immediately prior to such adjustment in the Warrant Price
    by a fraction, the numerator of which shall be the Warrant Price immediately
    prior to such adjustment and the denominator of which shall be the Warrant
    Price immediately thereafter.
 
                                       2
<PAGE>
    6.  NOTICE OF ADJUSTMENTS.
 
    Whenever any Warrant Price shall be adjusted pursuant to Section 5 hereof,
the Company shall prepare a certificate signed by its chief financial officer
setting forth, in reasonable detail, the event requiring the adjustment, the
amount of the adjustment, the method by which such adjustment was calculated,
the Warrant Price after giving effect to such adjustment and the number of
shares then purchasable upon exercise of this Warrant, and shall cause copies of
such certificate to be mailed (by first class mail, postage prepaid) to the
Holder of this Warrant at the address specified in Section 10(c) hereof, or at
such other address as may be provided to the Company in writing by the Holder of
this Warrant.
 
    7.  FRACTIONAL SHARES.
 
    No fractional shares of Common Stock will be issued in conjunction with any
exercise hereunder, but in lieu of such fractional shares the Company shall make
a cash payment therefore on the basis of the Warrant Price then in effect.
 
    8.  COMPLIANCE WITH SECURITIES ACT.
 
    The Holder of this Warrant, by acceptance hereof, agrees that this Warrant
and the shares of Common Stock to be issued on exercise hereof are being
acquired for investment and that it will not offer, sell or otherwise dispose of
this Warrant or any shares of Common Stock to be issued upon exercise hereof
except under circumstances which will not result in a violation of the
Securities Act of 1933, as amended (the "Act"). This Warrant and all shares of
Common Stock issued upon exercise of this Warrant (unless registered under the
Act) shall be stamped and imprinted with a legend substantially in the following
form:
 
       "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
       1933, AS AMENDED (THE "ACT"), OR APPLICABLE STATE SECURITIES LAWS
       AND MAY NOT BE TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS IT HAS
       BEEN REGISTERED UNDER THE ACT AND SUCH LAWS OR (1) REGISTRATION
       UNDER SUCH LAWS IS NOT REQUIRED AND (2) AN OPINION OF COUNSEL
       SATISFACTORY TO THE COMPANY IS FURNISHED TO THE COMPANY TO THE
       EFFECT THAT REGISTRATION UNDER THE ACT AND THE APPLICABLE STATE
       SECURITIES LAWS IS NOT REQUIRED.".
 
    9.  TRANSFER AND EXCHANGE OF WARRANT.
 
    This Warrant is not transferrable or exchangeable without the consent of the
Company.
 
    10.  MISCELLANEOUS.
 
        (a) NO RIGHTS AS SHAREHOLDER.  The Holder of this Warrant shall not be
    entitled to vote or receive dividends or be deemed the Holder of Common
    Stock or any other securities of the Company which may at any time be
    issuable on the exercise hereof for any purpose, nor shall anything
    contained herein be construed to confer upon the Holder of this Warrant, as
    such, any of the rights of a shareholder of the Company or any right to vote
    for the election of directors or upon any matter submitted to shareholders
    at any meeting thereof, or to give or withhold consent to any corporate
    action (whether upon any recapitalization, issuance of stock,
    reclassification of stock, change of par value or change of stock to no par
    value, consolidation, merger, conveyance or otherwise) or to receive notice
    of meetings, or to receive dividends or subscription rights or otherwise
    until the Warrant shall have been exercised and the shares purchasable upon
    the exercise hereof shall have become deliverable, as provided herein.
 
        (b) REPLACEMENT.  On receipt of evidence reasonably satisfactory to the
    Company of the loss, theft, destruction or mutilation of this Warrant and,
    in the case of loss, theft or destruction, on delivery of an indemnity
    agreement, or bond reasonably satisfactory in form and amount to the
 
                                       3
<PAGE>
    Company or, in the case of mutilation, on surrender and cancellation of this
    Warrant, the Company, at its expense, will execute and deliver, in lieu of
    this Warrant, a new Warrant of like tenor.
 
        (c) NOTICE.  Any notice given to either party under this Warrant shall
    be in writing, and any notice hereunder shall be deemed to have been given
    upon the earlier of delivery thereof by hand delivery, by courier, or by
    standard form of telecommunication or three (3) business days after the
    mailing thereof in the U.S. mail if sent registered mail with postage
    prepaid, addressed to the Company at its principal executive offices and to
    the Holder at its address set forth in the Company's books and records or at
    such other address as the Holder may have provided to the Company in
    writing.
 
        (d) GOVERNING LAW.  This Warrant shall be governed by and construed
    under the laws of the State of California.
 
    This Warrant is executed as of this 1st day of December, 1997.
 
<TABLE>
<S>                             <C>  <C>
                                ACACIA RESEARCH CORPORATION
 
                                By:
                                     -----------------------------------------
                                Name:
                                Title:
</TABLE>
 
                                       4
<PAGE>
                                                                       EXHIBIT 1
 
                               NOTICE OF EXERCISE
 
TO: ACACIA RESEARCH CORPORATION
 
    1.  The undersigned hereby elects to purchase        shares of Common Stock
of Acacia Research Corporation pursuant to the terms of the attached Warrant,
and tenders herewith payment of the purchase price of such shares in full.
 
    2.  Please issue a certificate or certificates representing said shares of
Common Stock in the name of the Holder at the address specified below:
 
<TABLE>
<S>                             <C>
- ------------------------------
            (Name)
 
- ------------------------------
 
- ------------------------------
          (Address)
</TABLE>
 
    3.  The undersigned represents that the aforesaid shares of Common Stock are
being acquired for the account of the undersigned for investment and not with a
view to, or for resale in connection with, the distribution thereof and that the
undersigned has no present intention of distributing or reselling such shares.
 
<TABLE>
<S>                             <C>
[NAME OF HOLDER]
- ------------------------------
 
- ------------------------------
Signature
</TABLE>
 
                                       5

<PAGE>

                        [LETTERHEAD OF O'MELVENY & MYERS LLP]

                                     February
                                     12th
                                     1998

Writer's Direct Dial Number                                   Our File Number
(213)669-6000                                                     003,863-999


Acacia Research Corporation
12 South Raymond Avenue
Pasadena, California 91105

               Re:  REGISTRATION STATEMENT ON FORM S-3
                    ----------------------------------

Ladies and Gentlemen:

               At your request, we have examined Amendment No. 1 to the 
Registration Statement on Form S-3 (File No. 333-45397) (the "Registration 
Statement") to be filed by you with the Securities and Exchange Commission on 
February 13, 1998 in connection with the registration under the Securities 
Act of 1933, as amended, of 885,467 shares of your Common Stock, $0.01 par 
value (the "Shares").

               We are familiar with the proceedings heretofore taken, and 
with the additional proceedings proposed to be taken, by you in connection 
with the authorization and proposed issuance and sale of the Shares.

               It is our opinion that, subject to said proceedings being duly 
taken and completed by you prior to the issuance and sale of the Shares, upon 
the issuance and sale thereof in the manner referred to in the Registration 
Statement, the Shares will be legally and validly issued, fully paid and 
nonassessable.

               We consent to the use of this opinion as an exhibit to the 
Registration Statement.

                                   Respectfully submitted,


                                   /s/ O'Melveny & Myers LLP
                                   -------------------------
                                     O'Melveny & Myers LLP

<PAGE>
                                                                    EXHIBIT 23.1
 
                         INDEPENDENT AUDITORS' CONSENT
 
    We consent to the incorporation by reference in this Registration Statement
of Acacia Research Corporation on Form S-3 of our report dated July 31, 1997
incorporated by reference into the Annual Report on Form 10-K/A of Acacia
Research Corporation for the fiscal year ended December 31, 1996 and to the
reference to us under the heading "Experts" in the Prospectus, which is part of
this Registration Statement.
 
/s/ Finocchiaro & Co.
 
Finocchiaro & Co.
 
   
Pasadena, California
February 12, 1998
    
 
                                       1


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