WELCH & FORBES INC
13F-HR, 1999-05-04
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<PAGE>
 
                                    FORM 13F

                INFORMATION REQUIRED OF INSTITUTIONAL INVESTMENT
              MANAGERS PURSUANT TO SECTION 13(f) OF THE SECURITIES
                    EXCHANGE ACT OF 1934 AND RULES THEREUNDER

                       Securities and Exchange Commission
                             Washington, D.C. 20549

                 Report for the Calendar Quarter Ended 3/31/99 
                                                       -------

                         If amended report check here: [_]

Name of Institutional Manager:

      Welch & Forbes, Inc.
- --------------------------------------------------------------------------------

Business Address:

Street  45 School Street       City  Boston     State    MA      Zip  02108     
        ---------------------        ---------           -----        ----------

Name, Phone No. and Title of Person Duly Authorized to Submit Report:

    V. William Efthim, (617) 523-1635, Vice President      
- --------------------------------------------------------------------------------

         The institutional investment manager submitting this Form and its
attachments and the person by whom it is signed represent hereby that all the
information contained therein is true, correct and complete. It is understood
that all the required items, statements and schedules are considered integral
parts of this Form and that the submission of any amendment represents that all
unamended items, statements and schedules remain true, correct and complete as
previously submitted.

         Pursuant to the requirements of Securities Exchange Act of 1934, the
undersigned institutional investment manager has caused this report to be signed
on his behalf in the City of Boston and State of Massachusetts on the 21st day
of April     , 1999.


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


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

Name and 13F file numbers of all Institutional Investment Managers with respect
to which this schedule is filed (other than the one filing this report).

<PAGE>
 
<TABLE> 

<S>                                                <C>                                                        <C>   
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      1     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY:      (2) WELCH AND FORBES                                                                                         

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>    
         COMMON                                                                                                                     
         ------                                                                                                                     

A T & T CORP                   001957109            411,992.15          5162  X                        0              0       5162  
                                                  5,063,812.40         63446       X                   0              0      63446  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  5,475,804.55         68608                           0              0      68608  

A T & T CORP-LIBERTY MEDIA     001957208          2,422,768.71         46069       X                   0              0      46069  
GROUP A                                                                                                                             

ABBOTT LABS                    002824100         13,423,952.54        286760  X                        0              0     286760  
                                                 50,647,614.13       1081925       X                   0              0    1081925  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 64,071,566.67       1368685                           0              0    1368685  

AETNA INC                      008117103            785,595.00          9465       X                   0              0       9465  

AFLAC INC                      001055102            287,865.51          5288  X                        0              0       5288  

AIR PRODS & CHEMS INC          009158106             99,325.00          2900  X                        0              0       2900  
                                                  6,961,586.50        203258       X                   0              0     203258  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,060,911.50        206158                           0              0     206158  

AIRTOUCH COMMUNICATIONS        00949T100            411,139.38          4255  X                        0              0       4255  
                                                  6,926,176.64         71681       X                   0              0      71681  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,337,316.02         75936                           0              0      75936  

ALBERTSONS INC                 013104104             21,775.00           400  X                        0              0        400  
                                                    348,835.50          6408       X                   0              0       6408  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    370,610.50          6808                           0              0       6808  

ALCOA INC.                     013817101            300,668.75          7300       X                   0              0       7300  

ALLEGIANCE TELECOM INC         01747T102             31,250.00          1250  X                        0              0       1250  
                                                    415,000.00         16600       X                   0              0      16600  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    446,250.00         17850                           0              0      17850  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 88,559,357.21       1812167                           0              0    1812167  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                 <C>                                                        <C>  
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      2     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

ALLSTATE CORP                  020002101              5,559.38           150  X                        0              0        150  
                                                  2,818,417.89         76045       X                   0              0      76045  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,823,977.27         76195                           0              0      76195  

ALLTEL CORP                    020039103            198,103.00          3176  X                        0              0       3176  
                                                 11,104,434.13        178027       X                   0              0     178027  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 11,302,537.13        181203                           0              0     181203  

ALZA CORP DEL                  022615108             59,287.50          1550  X                        0              0       1550  
                                                  2,574,225.00         67300       X                   0              0      67300  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,633,512.50         68850                           0              0      68850  

AMAZON.COM                     023135106            292,717.90          1700       X                   0              0       1700  

AMERICA ONLINE INC             02364J104            156,555.00          1065  X                        0              0       1065  
                                                  4,116,000.00         28000       X                   0              0      28000  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,272,555.00         29065                           0              0      29065  

AMERICAN ELEC PWR INC          025537101            259,834.07          6547       X                   0              0       6547  

AMERICAN EXPRESS CO            025816109            536,940.00          4560  X                        0              0       4560  
                                                  6,081,552.00         51648       X                   0              0      51648  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,618,492.00         56208                           0              0      56208  

AMERICAN GENERAL CORP          026351106            172,795.50          2451  X                        0              0       2451  
                                                 18,468,039.00        261958       X                   0              0     261958  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 18,640,834.50        264409                           0              0     264409  

AMERICAN HOME PRODS CORP       026609107          1,047,262.50         16050  X                        0              0      16050  
                                                 47,326,477.50        725310       X                   0              0     725310  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 48,373,740.00        741360                           0              0     741360  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 95,218,200.37       1425537                           0              0    1425537  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                        <C>   
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      3     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

AMERICAN INTL GROUP            026874107          3,675,081.91         30467  X                        0              0      30467  
                                                 90,915,183.56        753701       X                   0              0     753701  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 94,590,265.47        784168                           0              0     784168  

AMERICAN WTR WKS INC           030411102            466,000.00         16000       X                   0              0      16000  

AMERITECH CORP NEW             030954101            107,182.50          1860  X                        0              0       1860  
                                                  2,475,454.76         42958       X                   0              0      42958  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,582,637.26         44818                           0              0      44818  

AMGEN INC                      031162100            186,438.75          2490  X                        0              0       2490  
                                                  7,690,860.50        102716       X                   0              0     102716  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,877,299.25        105206                           0              0     105206  

AMP INC                        031897101          3,569,680.50         66723       X                   0              0      66723  

ANADARKO PETE CORP             032511107            461,531.50         12226       X                   0              0      12226  

ANALOG DEVICES INC             032654105             55,037.50          1850  X                        0              0       1850  
                                                    959,735.00         32260       X                   0              0      32260  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,014,772.50         34110                           0              0      34110  

ANHEUSER BUSCH COS INC         035229103         11,289,337.50        148300       X                   0              0     148300  

ANIKA THERAPEUTICS INC         035255108            217,539.00         41436       X                   0              0      41436  

APPLIED MATLS INC              038222105            129,542.70          2100  X                        0              0       2100  
                                                  2,378,774.09         38562       X                   0              0      38562  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,508,316.79         40662                           0              0      40662  

AQUAFUTURE                     0383799A3            933,975.00          1575       X                   0              0       1575  

ARGUS SOFTWARE                 0402769C3              9,600.00          8000  X                        0              0       8000  
                                                    903,000.00        752500       X                   0              0     752500  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                126,423,954.77       2055724                           0              0    2055724  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                         <C>  
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      4     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    912,600.00        760500                           0              0     760500  

ARGUSS HLDGS INC               040282105            666,540.88         41498       X                   0              0      41498  

ATLANTIC RICHFIELD CO          048825103             29,250.00           400  X                        0              0        400  
                                                  5,489,347.50         75068       X                   0              0      75068  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  5,518,597.50         75468                           0              0      75468  

AU BON PAIN INC A              050103100              7,875.00          1500  X                        0              0       1500  
                                                    107,257.50         20430       X                   0              0      20430  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    115,132.50         21930                           0              0      21930  

AU BON PAIN INC B              050990100             21,216.44          4297  X                        0              0       4297  
                                                    699,115.46        141593       X                   0              0     141593  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    720,331.90        145890                           0              0     145890  

AUTOMATIC DATA PROCESSING      053015103            777,353.50         18788  X                        0              0      18788  
                                                  5,677,312.00        137216       X                   0              0     137216  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,454,665.50        156004                           0              0     156004  

AVALONBAY COMMUNITIES INC      053484101            212,510.63          6667  X                        0              0       6667  

AVANDEL HEALTHCARE INC         9899479J7            750,000.00        750000       X                   0              0     750000  

AVERY DENNISON CORP            053611109            580,750.00         10100       X                   0              0      10100  

AVERY DEWING CORP              0536229A6            654,385.68          1083       X                   0              0       1083  

AVIRON                         053762100             12,150.00           600  X                        0              0        600  
                                                    233,401.50         11526       X                   0              0      11526  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    245,551.50         12126                           0              0      12126  

BANK NEW YORK INC              064057102            502,514.06         13983  X                        0              0      13983  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 16,420,980.15       1234749                           0              0    1234749  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                         <C>       
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      5     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                                  1,814,843.75         50500       X                   0              0      50500  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,317,357.81         64483                           0              0      64483  

BANK ONE CORPORATION           06423A103            120,421.70          2187  X                        0              0       2187  
                                                 16,619,294.18        301826       X                   0              0     301826  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 16,739,715.88        304013                           0              0     304013  

BANKAMERICA CORP- NEW          06605F102            233,698.13          3309  X                        0              0       3309  
                                                  6,511,625.00         92200       X                   0              0      92200  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,745,323.13         95509                           0              0      95509  

BANKBOSTON CORP                06605R106             13,860.00           320  X                        0              0        320  
                                                  1,930,611.40         44574       X                   0              0      44574  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,944,471.40         44894                           0              0      44894  

BANKERS TRUST N Y CORP         066365107            250,894.75          2843       X                   0              0       2843  

BANYAN SYS INC                 066908104          4,733,552.67        388410       X                   0              0     388410  

BAXTER INTL INC                071813109          1,177,968.00         17848       X                   0              0      17848  

BEACON CAP PARTNERS INC        073561102          1,320,000.00         66000       X                   0              0      66000  

BECTON DICKINSON & CO          075887109            237,537.50          6200  X                        0              0       6200  
                                                    298,837.50          7800       X                   0              0       7800  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    536,375.00         14000                           0              0      14000  

BELL ATLANTIC CORP             077853109            523,284.25         10124  X                        0              0      10124  
                                                  1,862,610.80         36036       X                   0              0      36036  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,385,895.05         46160                           0              0      46160  

BELLSOUTH CORP                 079860102            154,320.75          3852  X                        0              0       3852  
                                                 31,359,683.09        782769       X                   0              0     782769  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 69,163,043.47       1816798                           0              0    1816798  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      6     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 31,514,003.84        786621                           0              0     786621  

BELO A H CORP DEL              080555105          1,277,938.00         70024       X                   0              0      70024  

BERKSHIRE HATHAWAY INC B       084670207            883,976.00           376  X                        0              0        376  
                                                 34,256,421.00         14571       X                   0              0      14571  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 35,140,397.00         14947                           0              0      14947  

BERKSHIRE HATHAWAY INC CL A    084670108            285,600.00             4  X                        0              0          4  
CONV                                                                                                                                

BESTFOODS                      08658U101          1,538,874.00         32742       X                   0              0      32742  

BIOGEN INC                     090597105            891,633.60          7800       X                   0              0       7800  

BLACK & DECKER CORP            091797100          1,282,158.51         23128       X                   0              0      23128  

BLACK BOX CORP DEL             091826107             99,200.00          3200  X                        0              0       3200  
                                                    334,800.00         10800       X                   0              0      10800  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    434,000.00         14000                           0              0      14000  

BLUE DIAMOND OIL CORP          095599908            134,400.00         22400       X                   0              0      22400  

BOSTON PRIVATE FINANCIAL       101119105            110,625.00         15000       X                   0              0      15000  
HOLDINGS INC                                                                                                                        

BOSTON SCIENTIFIC CORP         101137107            485,062.50         11940  X                        0              0      11940  
                                                  1,482,812.50         36500       X                   0              0      36500  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,967,875.00         48440                           0              0      48440  

BRISTOL MYERS SQUIBB CO        110122108          3,113,268.75         48550  X                        0              0      48550  
                                                 33,377,960.25        520514       X                   0              0     520514  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 36,491,229.00        569064                           0              0     569064  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 79,554,730.11        817549                           0              0     817549  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      7     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

BROKEN HILL PROPRIETARY LTD    112169602            260,975.25         15129       X                   0              0      15129  
ADR                                                                                                                                 

BROOKLINE BANCCORP INC         113739106            153,744.50         13516       X                   0              0      13516  

BURLINGTN NORTHN SANTA FE      12189T104            917,245.38         27901       X                   0              0      27901  

BURLINGTON RESOURCES INC       122014103            503,731.70         12613       X                   0              0      12613  

CABLESOFT CORP                 1269109D2                175.72          4393  X                        0              0       4393  
                                                     12,709.80        317745       X                   0              0     317745  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                     12,885.52        322138                           0              0     322138  

CABOT CORP                     127055101          1,049,070.00         49368       X                   0              0      49368  

CABOT INDUSTRIAL TRUST         127072106             33,031.25          1750  X                        0              0       1750  
                                                  8,690,050.00        460400       X                   0              0     460400  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  8,723,081.25        462150                           0              0     462150  

CAIRNSTONE INC                 1277669C9                  0.00        200000       X                   0              0     200000  

CAMPBELL SOUP CO               134429109             71,203.13          1750  X                        0              0       1750  
                                                 10,419,661.90        256090       X                   0              0     256090  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 10,490,865.03        257840                           0              0     257840  

CAPITAL ONE FINL CORP          14040H105          1,223,100.00          8100       X                   0              0       8100  

CARDINAL HEALTH INC            14149Y108            248,820.00          3770  X                        0              0       3770  
                                                    876,216.00         13276       X                   0              0      13276  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,125,036.00         17046                           0              0      17046  

CAROLINA PWR & LT CO           144141108             98,312.50          2600  X                        0              0       2600  
                                                  3,958,968.77        104700       X                   0              0     104700  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 28,517,015.90       1493101                           0              0    1493101  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      8     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,057,281.27        107300                           0              0     107300  

CATERPILLAR INC                149123101            145,070.63          3158  X                        0              0       3158  
                                                    334,425.00          7280       X                   0              0       7280  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    479,495.63         10438                           0              0      10438  

CBS CORP                       12490K107            102,031.25          2500  X                        0              0       2500  
                                                    285,687.50          7000       X                   0              0       7000  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    387,718.75          9500                           0              0       9500  

CENTAUR INC                    151327996            111,639.00         74426       X                   0              0      74426  

CHAMPION ENTERPRISES INC       158496109            202,468.75         10450  X                        0              0      10450  
                                                  2,961,468.75        152850       X                   0              0     152850  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,163,937.50        163300                           0              0     163300  

CHASE GEN CORP                 161555107                  0.00         19129       X                   0              0      19129  

CHASE MANHATTAN CORP NEW       16161A108            256,819.50          3156       X                   0              0       3156  

CHEVRON CORP                   166751107            330,150.00          3720  X                        0              0       3720  
                                                  6,410,856.25         72235       X                   0              0      72235  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,741,006.25         75955                           0              0      75955  

CHUBB CORP                     171232101          1,789,904.25         30564       X                   0              0      30564  

CIGNA CORP                     125509109             73,419.76           876  X                        0              0        876  
                                                  3,187,473.18         38031       X                   0              0      38031  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,260,892.94         38907                           0              0      38907  

CINTAS CORP                    172908105          1,594,496.27         24390  X                        0              0      24390  
                                                 39,737,278.53        607836       X                   0              0     607836  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 57,523,188.62       1057601                           0              0    1057601  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE      9     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 41,331,774.80        632226                           0              0     632226  

CISCO SYSTEMS INC              17275R102          2,041,578.30         18634  X                        0              0      18634  
                                                 17,393,953.55        158759       X                   0              0     158759  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 19,435,531.85        177393                           0              0     177393  

CITIGROUP INC.                 172967101            663,852.88         10393  X                        0              0      10393  
                                                  2,052,431.51         32132       X                   0              0      32132  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,716,284.39         42525                           0              0      42525  

CLOSURE MED CORP               189093107            106,780.00          2810  X                        0              0       2810  
                                                    824,600.00         21700       X                   0              0      21700  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    931,380.00         24510                           0              0      24510  

CMGI INC                       125750109          3,633,780.70         19850       X                   0              0      19850  

COCA COLA CO                   191216100            342,349.75          5578  X                        0              0       5578  
                                                 19,999,105.19        325851       X                   0              0     325851  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 20,341,454.94        331429                           0              0     331429  

COGNEX CORP                    192422103            207,261.25          8750  X                        0              0       8750  
                                                 12,708,312.37        536510       X                   0              0     536510  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 12,915,573.62        545260                           0              0     545260  

COLGATE PALMOLIVE CO           194162103            204,240.00          2220  X                        0              0       2220  
                                                  7,740,696.00         84138       X                   0              0      84138  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,944,936.00         86358                           0              0      86358  

COMERICA INC                   200340107            279,220.50          4472       X                   0              0       4472  

COMPAQ COMPUTER CORP           204493100            246,275.25          7772  X                        0              0       7772  
                                                    513,337.50         16200       X                   0              0      16200  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 68,957,774.75       1255769                           0              0    1255769  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     10     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    759,612.75         23972                           0              0      23972  

COMPUTER SCIENCES CORP         205363104            751,101.88         13610       X                   0              0      13610  

CONAGRA INC                    205887102            260,913.75         10182       X                   0              0      10182  

CONCORD EFS INC                206197105            158,205.88          5740  X                        0              0       5740  
                                                    286,093.56         10380       X                   0              0      10380  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    444,299.44         16120                           0              0      16120  

CONSOLIDATED STORES CORP       210149100            512,766.25         16916       X                   0              0      16916  

CORNING INC                    219350105             54,000.00           900  X                        0              0        900  
                                                  5,070,361.68         84506       X                   0              0      84506  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  5,124,361.68         85406                           0              0      85406  

CORP FOR LASER OPTICS RES      2200359A9             12,501.00          6945  X                        0              0       6945  
                                                    137,500.20         76389       X                   0              0      76389  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    150,001.20         83334                           0              0      83334  

COX COMMUNICATIONS INC A       224044107            186,113.13          2461  X                        0              0       2461  
                                                  1,195,706.88         15811       X                   0              0      15811  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,381,820.01         18272                           0              0      18272  

CSX CORP                       126408103            155,750.00          4000  X                        0              0       4000  
                                                    200,138.76          5140       X                   0              0       5140  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    355,888.76          9140                           0              0       9140  

CVS CORP                       126650100            285,000.00          6000       X                   0              0       6000  

DAYTON HUDSON CORP             239753106            333,791.25          5010       X                   0              0       5010  

DEVRY INC DEL                  251893103            327,700.00         11300       X                   0              0      11300  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                  9,927,644.22        275290                           0              0     275290  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                        <C>        
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     11     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                          <C>             <C>               <C>           <C>   <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

DIGITRACE CARE SYS             2538979A2             60,000.00         20000       X                   0              0      20000  

DII GROUP INC                  232949107              1,755.00            60  X                        0              0         60  
                                                  2,590,409.25         88561       X                   0              0      88561  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,592,164.25         88621                           0              0      88621  

DISNEY WALT CO                 254687106            130,476.00          4192  X                        0              0       4192  
                                                  3,580,526.64        115037       X                   0              0     115037  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,711,002.64        119229                           0              0     119229  

DOVER CORP                     260003108            101,912.50          3100  X                        0              0       3100  
                                                 25,773,934.26        783998       X                   0              0     783998  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 25,875,846.76        787098                           0              0     787098  

DOW CHEM CO                    260543103          4,283,270.24         45964       X                   0              0      45964  

DOW JONES & CO INC             260561105            589,843.75         12500       X                   0              0      12500  

DPL INC                        233293109             15,460.50           937  X                        0              0        937  
                                                    421,987.50         25575       X                   0              0      25575  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    437,448.00         26512                           0              0      26512  

DU PONT E I DE NEMOURS         263534109            810,204.13         13954  X                        0              0      13954  
                                                 20,855,287.53        359187       X                   0              0     359187  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 21,665,491.66        373141                           0              0     373141  

DUKE ENERGY CORP               264399106             70,160.01          1280  X                        0              0       1280  
                                                    336,877.64          6146       X                   0              0       6146  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    407,037.65          7426                           0              0       7426  

DUN & BRADSTREET CORP          26483B106            736,155.01         20664       X                   0              0      20664  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 60,358,259.96       1501155                           0              0    1501155  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                              <C>                                                          <C>   
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     12     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>   
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

E M C CORP MASS                268648102          2,606,100.00         20400  X                        0              0      20400  
                                                 20,756,820.00        162480       X                   0              0     162480  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 23,362,920.00        182880                           0              0     182880  

E TOWN                         269242103            303,795.00          7536       X                   0              0       7536  

E-TRAVEL SYSTEMS               2691999A5             24,128.00         92800       X                   0              0      92800  

EASTMAN KODAK CO               277461109             16,671.38           261  X                        0              0        261  
                                                    585,989.26          9174       X                   0              0       9174  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    602,660.64          9435                           0              0       9435  

EDO CORP                       281347104            182,000.00         28000       X                   0              0      28000  

EDUCATION PARTNERS LP III      2813909B2             15,385.00          1000  X                        0              0       1000  
                                                    251,775.53         16365       X                   0              0      16365  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    267,160.53         17365                           0              0      17365  

ELAN PLC ADR                   284131208             11,508.75           165  X                        0              0        165  
                                                  5,453,892.00         78192       X                   0              0      78192  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  5,465,400.75         78357                           0              0      78357  

EMERSON ELEC CO                291011104            263,099.38          4970  X                        0              0       4970  
                                                  9,223,459.53        174233       X                   0              0     174233  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  9,486,558.91        179203                           0              0     179203  

EMPOWER                        2921999A6            200,000.00        100000       X                   0              0     100000  

ENERGY RESH CORP N Y           29271E100            323,000.00         38000       X                   0              0      38000  

ENERGYNORTH INC                292925104            493,817.50         17957       X                   0              0      17957  

ENRON CORP                     293561106             35,980.00           560  X                        0              0        560  
                                                    280,258.50          4362       X                   0              0       4362  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 41,027,679.83        756455                           0              0     756455  

</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                        <C>        
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     13     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>           <C>   <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    316,238.50          4922                           0              0       4922  

EPICON INC                     2942559C0                  0.00        108350       X                   0              0     108350  

EQUIFAX INC                    294429105            152,968.75          4450  X                        0              0       4450  
                                                    391,875.00         11400       X                   0              0      11400  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    544,843.75         15850                           0              0      15850  

EQUITY OFFICE PPTYS TR         294741103            135,578.63          5343  X                        0              0       5343  
                                                  5,755,430.69        226815       X                   0              0     226815  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  5,891,009.32        232158                           0              0     232158  

EXXON CORP                     302290101         12,570,921.08        178153  X                        0              0     178153  
                                                132,041,913.12       1871276       X                   0              0    1871276  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                144,612,834.20       2049429                           0              0    2049429  

FEDERAL NATL MTG ASSN          313586109            405,112.50          5850  X                        0              0       5850  
                                                  2,262,120.50         32666       X                   0              0      32666  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,667,233.00         38516                           0              0      38516  

FIDUCIARY CO INC               316476902            270,375.00          1250       X                   0              0       1250  

FIRST DATA CORP                319963104            427,500.00         10000  X                        0              0      10000  

FIRST UNION CORP               337358105              8,015.63           150  X                        0              0        150  
                                                    789,539.08         14775       X                   0              0      14775  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    797,554.71         14925                           0              0      14925  

FIRSTAR CORP NEW WIS           33763V109          5,140,343.00         57434       X                   0              0      57434  

FLEET FINL GROUP INC NEW       338915101             79,012.50          2100  X                        0              0       2100  
                                                  8,725,764.25        231914       X                   0              0     231914  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                169,156,469.73       2761926                           0              0    2761926  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                              <C>                                                          <C>   
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     14     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                           <C>           <C>               <C>             <C>  <C> <C>  <C>               <C>        <C>     
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  8,804,776.75        234014                           0              0     234014  

FOCUS ENHANCEMENT              344159108              2,426.13          1493  X                        0              0       1493  
                                                     95,948.18         59045       X                   0              0      59045  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                     98,374.31         60538                           0              0      60538  

FPL GROUP INC                  302571104             53,250.00          1000  X                        0              0       1000  
                                                    751,304.25         14109       X                   0              0      14109  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    804,554.25         15109                           0              0      15109  

GAMEWRIGHT INC                 364625996              6,250.00          6250  X                        0              0       6250  
                                                    156,150.00        156150       X                   0              0     156150  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    162,400.00        162400                           0              0     162400  

GANNETT INC                    364730101            602,973.00          9571       X                   0              0       9571  

GELTEX PHARMACEUTICALS         368538104              7,734.10           550  X                        0              0        550  
                                                    675,679.10         48050       X                   0              0      48050  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    683,413.20         48600                           0              0      48600  

GENERAL ELEC CO                369604103          7,749,170.64         70049  X                        0              0      70049  
                                                206,933,244.50       1870583       X                   0              0    1870583  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                214,682,415.14       1940632                           0              0    1940632  

GENERAL MLS INC                370334104            181,350.00          2400  X                        0              0       2400  
                                                  6,927,721.14         91682       X                   0              0      91682  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,109,071.14         94082                           0              0      94082  

GENERAL MTRS CORP              370442105             43,500.00           500  X                        0              0        500  
                                                    345,564.00          3972       X                   0              0       3972  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                224,532,265.04       2335404                           0              0    2335404  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                       <C>    
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     15     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>    
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    389,064.00          4472                           0              0       4472  

GENERAL ORTHOPEDICS            3719909F1             10,840.20         18067       X                   0              0      18067  

GENRAD INC                     372447102          2,037,340.00        141728       X                   0              0     141728  

GENZYME CORP                   372917104            478,041.89          9478  X                        0              0       9478  
                                                 13,812,122.02        273849       X                   0              0     273849  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 14,290,163.91        283327                           0              0     283327  

GENZYME CORP TISSUE REPAIR     372917401              5,863.23          2536  X                        0              0       2536  
                                                    246,912.36        106796       X                   0              0     106796  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    252,775.59        109332                           0              0     109332  

GEOPETRO COMPANY               373160993            151,000.00        302000       X                   0              0     302000  

GEORGIA PAC CORP               373298108              7,425.00           100  X                        0              0        100  
                                                    465,473.25          6269       X                   0              0       6269  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    472,898.25          6369                           0              0       6369  

GILLETTE CO                    375766102          2,063,551.13         34718  X                        0              0      34718  
                                                 44,673,700.94        751608       X                   0              0     751608  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 46,737,252.07        786326                           0              0     786326  

GREAT LAKES CHEM CORP          390568103            117,600.00          3200  X                        0              0       3200  
                                                  1,296,429.75         35277       X                   0              0      35277  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,414,029.75         38477                           0              0      38477  

GREEN POWER ASIA LTD           393400999                  0.00        620375       X                   0              0     620375  

GSI LUMONICS                   36229U102            405,094.50         87588       X                   0              0      87588  

GTE CORP                       362320103            781,660.00         12920  X                        0              0      12920  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 66,553,054.27       2406509                           0              0    2406509  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                        <C>        
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     16     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>   
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                                 14,899,304.87        246270       X                   0              0     246270  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 15,680,964.87        259190                           0              0     259190  

HALLIBURTON CO                 406216101             38,500.00          1000  X                        0              0       1000  
                                                    528,220.00         13720       X                   0              0      13720  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    566,720.00         14720                           0              0      14720  

HANNAFORD BROS CO              410550107            340,781.25          7500       X                   0              0       7500  

HARTFORD FINL SVCS GROUP       416515104            742,312.13         13066       X                   0              0      13066  

HEINZ H J CO                   423074103             66,325.00          1400  X                        0              0       1400  
                                                    797,984.50         16844       X                   0              0      16844  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    864,309.50         18244                           0              0      18244  

HELENA SILVER MINES INC        423209105                 11.11         11110       X                   0              0      11110  

HELIX TECHNOLOGY CORP          423319102            242,925.00         15800       X                   0              0      15800  

HEMAGEN DIAGNOSTICS INC        423501105             99,000.00         88000       X                   0              0      88000  

HEWLETT PACKARD CO             428236103          1,270,806.26         18740  X                        0              0      18740  
                                                 36,011,692.58        531048       X                   0              0     531048  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 37,282,498.84        549788                           0              0     549788  

HOME DEPOT INC                 437076102          2,194,312.50         35250  X                        0              0      35250  
                                                 46,357,824.00        744704       X                   0              0     744704  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 48,552,136.50        779954                           0              0     779954  

HOUGHTON MIFFLIN CO            441560109          2,765,625.00         59000       X                   0              0      59000  

HSB GROUP INC                  40428N109             44,550.00          1200  X                        0              0       1200  
                                                    404,217.00         10888       X                   0              0      10888  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                106,804,391.20       1815540                           0              0    1815540  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                        <C>   
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     17     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>      
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    448,767.00         12088                           0              0      12088  

HUBBELL INC B                  443510201             69,360.00          1734  X                        0              0       1734  
                                                  7,430,880.00        185772       X                   0              0     185772  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,500,240.00        187506                           0              0     187506  

I2 TECHNOLOGIES INC            465754109            332,425.00         12500       X                   0              0      12500  

IBM CORP                       459200101          3,084,327.25         17401  X                        0              0      17401  
                                                 43,700,278.50        246546       X                   0              0     246546  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 46,784,605.75        263947                           0              0     263947  

IDEXX LABORATORIES INC         45168D104            245,186.69         10243       X                   0              0      10243  

ILLINOIS GAS CO                4520459A7          1,200,000.00           600       X                   0              0        600  

ILLINOIS TOOL WKS INC          452308109            210,993.75          3410  X                        0              0       3410  
                                                    441,354.38          7133       X                   0              0       7133  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    652,348.13         10543                           0              0      10543  

IMS HEALTH INCORPORATED        449934108            966,620.63         29181  X                        0              0      29181  
                                                 13,339,835.01        402712       X                   0              0     402712  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 14,306,455.64        431893                           0              0     431893  

INFORMATION MAPPING INC        4567099A4                  0.00         28667       X                   0              0      28667  

INTEL CORP                     458140100          4,016,786.25         33790  X                        0              0      33790  
                                                 61,184,249.27        514694       X                   0              0     514694  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 65,201,035.52        548484                           0              0     548484  

INTERNATIONAL PAPER C0         460146103          1,278,196.88         30298       X                   0              0      30298  

INTERPUBLIC GROUP COS          460690100            735,140.00          9440  X                        0              0       9440  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                138,235,633.61       1534121                           0              0    1534121  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                 <C>                                                       <C>       
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     18     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                                 27,517,131.31        353350       X                   0              0     353350  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 28,252,271.31        362790                           0              0     362790  

INTERSTATE ENERGY CORP         460845100              5,325.00           200  X                        0              0        200  
                                                  3,039,989.25        114178       X                   0              0     114178  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,045,314.25        114378                           0              0     114378  

INTL FLAVORS & FRAGRANCES      459506101            239,460.94          6375       X                   0              0       6375  

INVESTORS FINL SVCS            461915100          1,471,770.00         51192       X                   0              0      51192  

IPALCO ENTERPRISES INC         462613100            224,552.25         10236       X                   0              0      10236  

JEFFERSON PILOT CORP           475070108            734,410.00         10840       X                   0              0      10840  

JML CORP                       4662189D8            211,541.00          1000       X                   0              0       1000  

JOHNSON & JOHNSON              478160104          1,178,100.00         12600  X                        0              0      12600  
                                                 25,507,080.50        272803       X                   0              0     272803  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 26,685,180.50        285403                           0              0     285403  

JOHNSON CTLS INC               478366107            292,663.50          4692       X                   0              0       4692  

K MART CORP                    482584109            229,490.63         13650       X                   0              0      13650  

KEYCORP NEW                    493267108            205,033.75          6764       X                   0              0       6764  

KIMBERLY CLARK CORP            494368103          6,716,810.75        140116       X                   0              0     140116  

KINNEY OIL CO                  496625997                  0.00         14952       X                   0              0      14952  

LEADVILLE CORP                 5217119A1            136,308.75        181745       X                   0              0     181745  

LILLY ELI & CO                 532457108            510,947.50          6020  X                        0              0       6020  
                                                 14,334,878.25        168894       X                   0              0     168894  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 82,555,493.38       1369607                           0              0    1369607  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                               <C>                                                         <C>   
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     19     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>   
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 14,845,825.75        174914                           0              0     174914  

LINCOLN NATL CORP IND          534187109            395,500.00          4000       X                   0              0       4000  

LINEAR TECHNOLOGY CORP         535678106          1,173,368.75         22895  X                        0              0      22895  
                                                 28,601,087.50        558070       X                   0              0     558070  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 29,774,456.25        580965                           0              0     580965  

LUCENT TECHNOLOGIES INC        549463107          2,705,940.00         25055  X                        0              0      25055  
                                                 25,624,512.00        237264       X                   0              0     237264  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 28,330,452.00        262319                           0              0     262319  

M & T BANK CORP                55261F104            668,205.00          1395  X                        0              0       1395  

M C I WORLDCOM INC             55268B106            252,136.01          2847  X                        0              0       2847  
                                                  1,863,875.85         21046       X                   0              0      21046  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,116,011.86         23893                           0              0      23893  

MACDERMID INC                  554273102            553,181.25         16300       X                   0              0      16300  

MARSH & MCLENNAN COS           571748102             26,061.75           351  X                        0              0        351  
                                                    587,466.00          7912       X                   0              0       7912  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    613,527.75          8263                           0              0       8263  

MASCO CORP                     574599106            225,830.50          7994  X                        0              0       7994  
                                                 23,157,542.00        819736       X                   0              0     819736  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 23,383,372.50        827730                           0              0     827730  

MATRITECH INC                  576818108            143,391.60         91800       X                   0              0      91800  

MAXIM INTERGRATED PRODUCTS INC 57772K101            589,529.50         10892  X                        0              0      10892  

MAY DEPT STORES CO             577778103             39,594.50          1012  X                        0              0       1012  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 86,607,222.21       1828569                           0              0    1828569  
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                <C>                                                        <C>        
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     20     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

<CAPTION> 
 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                                    349,816.63          8941       X                   0              0       8941  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    389,411.13          9953                           0              0       9953  

MAYTAG CORP                    578592107            241,500.00          4000       X                   0              0       4000  

MBIA INC                       55262C100            235,190.00          4055  X                        0              0       4055  
                                                 24,054,398.00        414731       X                   0              0     414731  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 24,289,588.00        418786                           0              0     418786  

MBNA CORP                      55262L100            264,535.00         11080  X                        0              0      11080  
                                                     57,371.63          2403       X                   0              0       2403  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    321,906.63         13483                           0              0      13483  

MCDONALDS CORP                 580135101            486,429.69         10735  X                        0              0      10735  
                                                  3,456,029.69         76271       X                   0              0      76271  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,942,459.38         87006                           0              0      87006  

MCGRAW HILL COS INC            580645109            427,280.00          7840       X                   0              0       7840  

MEDIA ONE GROUP INC            58440J104              9,135.00           144  X                        0              0        144  
                                                  3,100,254.07         48871       X                   0              0      48871  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,109,389.07         49015                           0              0      49015  

MEDTRONIC INC                  585055106            961,687.50         13380  X                        0              0      13380  
                                                  3,581,531.25         49830       X                   0              0      49830  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,543,218.75         63210                           0              0      63210  

MELLON BK CORP                 585509102            802,275.00         11400       X                   0              0      11400  

MERCK & CO INC                 589331107         81,283,287.00       1014456  X                        0              0    1014456  
                                                231,583,685.00       2890280       X                   0              0    2890280  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                350,894,405.46       4568417                           0              0    4568417  
</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     21     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         


                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         COMMON (cont.)                                                                                                             
         --------------                                                                                                             
<S>                            <C>           <C>               <C>            <C>  <C>      <C>               <C>        <C>   
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                312,866,972.00       3904736                           0              0    3904736  

META GROUP INC                 591002100            142,680.00          9280  X                        0              0       9280  
                                                  4,342,668.77        282450       X                   0              0     282450  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,485,348.77        291730                           0              0     291730  

MGI PPTYS                      552885105            176,568.75          6450  X                        0              0       6450  
                                                 11,263,060.51        411436       X                   0              0     411436  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 11,439,629.26        417886                           0              0     417886  

MICROSOFT CORP                 594918104          4,868,250.75         54318  X                        0              0      54318  
                                                 74,159,130.75        827438       X                   0              0     827438  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 79,027,381.50        881756                           0              0     881756  

MIDAMERICAN ENERGY HOLDINGS    59562V107            249,200.00          8900       X                   0              0       8900  
COMPANY                                                                                                                             

MILLIPORE CORP                 601073109          5,666,866.08        234896       X                   0              0     234896  

MINNESOTA MNG & MFG CO         604059105             14,503.75           205  X                        0              0        205  
                                                 22,052,916.50        311702       X                   0              0     311702  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 22,067,420.25        311907                           0              0     311907  

MOBIL CORP                     607059102          1,311,552.00         14904  X                        0              0      14904  
                                                 16,526,048.00        187796       X                   0              0     187796  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 17,837,600.00        202700                           0              0     202700  

MONSANTO CO                    611662107             30,318.75           660  X                        0              0        660  
                                                  5,088,956.30        110780       X                   0              0     110780  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  5,119,275.05        111440                           0              0     111440  

MORGAN J P & CO INC            616880100             80,193.75           650  X                        0              0        650  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                145,972,914.66       2461865                           0              0    2461865  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     22     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         COMMON (cont.)                                                                                                             
         --------------                                                                                                             
<S>                            <C>           <C>               <C>            <C>      <C>  <C>               <C>        <C>   
                                                  4,221,769.13         34219       X                   0              0      34219  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,301,962.88         34869                           0              0      34869  

MORGAN STANLEY DEAN WITTER     617446448            218,263.51          2184       X                   0              0       2184  

MOTOROLA INC                   620076109            161,150.00          2200  X                        0              0       2200  
                                                  9,289,198.75        126815       X                   0              0     126815  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  9,450,348.75        129015                           0              0     129015  

MYLAN LABS INC                 628530107            767,756.13         27982       X                   0              0      27982  

NALCO CHEM CO                  629853102            217,812.50          8200       X                   0              0       8200  

NATIONAL CITY CORP             635405103              6,637.50           100  X                        0              0        100  

                                                    451,084.50          6796       X                   0              0       6796  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    457,722.00          6896                           0              0       6896  

NETWORK APPLIANCE INC          64120L104            465,750.00          9200       X                   0              0       9200  

NEW ENGLAND BUSINESS SVC       643872104          1,234,078.89         43018       X                   0              0      43018  

NEWELL RUBBERMAID INC.         651229106            218,500.00          4600  X                        0              0       4600  
                                                    134,757.50          2837       X                   0              0       2837  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    353,257.50          7437                           0              0       7437  

NORDSTROM INC                  655664100          1,338,411.00         32744       X                   0              0      32744  

NORFOLK SOUTHERN CORP          655844108             79,125.00          3000  X                        0              0       3000  
                                                    286,828.13         10875       X                   0              0      10875  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    365,953.13         13875                           0              0      13875  

NORTHERN STS PWR MINN          665772109            204,792.01          8832       X                   0              0       8832  

NORTHERN TR CORP               665859104             31,084.20           350  X                        0              0        350  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 19,326,998.75        323952                           0              0     323952  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     23     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

<S>                            <C>           <C>               <C>            <C>  <C>      <C>               <C>        <C>        
                                                  2,522,260.80         28400       X                   0              0      28400  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,553,345.00         28750                           0              0      28750  

NOVARTIS AG SPONSORED ADR      66987V109            202,767.50          2500       X                   0              0       2500  

NOVELL INC                     670006105            243,256.05          9658       X                   0              0       9658  

NOVEN PHARMACEUTICALS          670009109            477,646.89        103275       X                   0              0     103275  

O REILLY AUTOMOTIVE INC        686091109            256,641.25          5735  X                        0              0       5735  
                                                  1,109,352.50         24790       X                   0              0      24790  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,365,993.75         30525                           0              0      30525  

OBJECT DESIGN INC              674416102             89,175.00         17400  X                        0              0      17400  
                                                  3,893,975.00        759800       X                   0              0     759800  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,983,150.00        777200                           0              0     777200  

OCEAN NATL CORP                674856109            315,210.00          3318       X                   0              0       3318  

ONE VALLEY BANCORP INC         682419106            882,128.28         25294       X                   0              0      25294  

OVERSEAS PARTNERS LTD          690350921          5,155,701.76        259864       X                   0              0     259864  

PARAMETRIC TECHNOLOGY CRP      699173100            276,500.00         14000  X                        0              0      14000  
                                                  3,152,100.00        159600       X                   0              0     159600  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,428,600.00        173600                           0              0     173600  

PAYCHEX INC                    704326107          1,982,771.74         41798  X                        0              0      41798  
                                                 49,509,380.49       1043687       X                   0              0    1043687  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 51,492,152.23       1085485                           0              0    1085485  

PENNEY J C CO INC              708160106            286,092.00          7064       X                   0              0       7064  

PEOPLES HERITAGE FINL GRP      711147108            249,840.00         13880       X                   0              0      13880  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 70,604,799.26       2520063                           0              0    2520063  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     24     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         


                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

<S>                            <C>           <C>               <C>            <C>  <C>      <C>               <C>        <C>  
PEPSICO INC                    713448108            672,065.63         17150  X                        0              0      17150  
                                                  3,692,403.07         94224       X                   0              0      94224  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,364,468.70        111374                           0              0     111374  

PERITUS SOFTWARE SVCS INC      714006103                438.00          2000  X                        0              0       2000  
                                                      7,970.94         36397       X                   0              0      36397  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                      8,408.94         38397                           0              0      38397  

PFIZER INC                     717081103          5,856,915.00         42212  X                        0              0      42212  
                                                 61,218,858.75        441217       X                   0              0     441217  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 67,075,773.75        483429                           0              0     483429  

PHARMACIA & UPJOHN INC         716941109            417,912.50          6700       X                   0              0       6700  

PHILIP MORRIS COS INC          718154107             28,853.75           820  X                        0              0        820  
                                                  1,605,992.68         45641       X                   0              0      45641  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,634,846.43         46461                           0              0      46461  

PHILLIPS PETE CO               718507106            434,794.50          9202       X                   0              0       9202  

PHOTOSCAPE ASSOCIATES          7193469A8                  0.00         10000       X                   0              0      10000  

PIONEER HI BRED INTL INC       723686101          1,091,125.00         29000       X                   0              0      29000  

PITNEY BOWES INC               724479100             31,875.00           500  X                        0              0        500  
                                                  6,157,357.50         96586       X                   0              0      96586  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,189,232.50         97086                           0              0      97086  

PMC COML TR                    693434102            121,600.00          7600  X                        0              0       7600  
                                                  1,528,800.00         95550       X                   0              0      95550  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,650,400.00        103150                           0              0     103150  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 82,866,962.32        934799                           0              0     934799  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     25     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         COMMON (cont.)                                                                                                             
         --------------                                                                                                             
<S>                            <C>           <C>               <C>            <C>  <C>      <C>               <C>        <C>     
PNC BK CORP                    693475105          1,271,381.13         22882       X                   0              0      22882  

POINT THERAPEUTICS             9899469P5            125,000.00         12500       X                   0              0      12500  

POLARIS VENTURE PARTNERS       731111910            162,641.00        162641       X                   0              0     162641  

POLICY MGMT SYS CORP           731108106          1,138,974.39         37191       X                   0              0      37191  

POLYMEDICA CORPORATION         731738100            195,000.00         26000       X                   0              0      26000  

POTOMAC ELEC PWR CO            737679100            482,300.00         20800       X                   0              0      20800  

PPG INDS INC                   693506107            215,250.00          4200       X                   0              0       4200  

PRIAM CORP                     741400105                  0.00         26550  X                        0              0      26550  

PROCTER & GAMBLE CO            742718109          8,115,982.69         82869  X                        0              0      82869  

                                                108,717,382.87       1110069       X                   0              0    1110069  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                116,833,365.56       1192938                           0              0    1192938  

PROGRESSIVE CORP OHIO          743315103              6,457.50            45  X                        0              0         45  
                                                  6,864,466.00         47836       X                   0              0      47836  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,870,923.50         47881                           0              0      47881  

PROVIDIAN FINL CORP            74406A102          2,782,560.00         25296       X                   0              0      25296  

PUMA TECHNOLOGY INC            745887109            109,500.00         29200  X                        0              0      29200  
                                                  6,478,095.00       1727492       X                   0              0    1727492  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,587,595.00       1756692                           0              0    1756692  

QUESTECH CORPORATION           4580999F7            164,250.00         36500       X                   0              0      36500  

QUINTILES TRANSNATIONAL        748767100            906,000.00         24000       X                   0              0      24000  

QWEST COMMUNICATIONS INTL INC  749121109            169,637.18          2353  X                        0              0       2353  
                                                  9,272,585.98        128618       X                   0              0     128618  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                147,177,463.74       3527042                           0              0    3527042  
</TABLE> 

<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     26     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  9,442,223.16        130971                           0              0     130971  

R & B FALCON CORP              74912E101            127,650.00         14800  X                        0              0      14800  
                                                    562,746.75         65246       X                   0              0      65246  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    690,396.75         80046                           0              0      80046  

RAPID COMMUNICATION L P        753388990             50,000.00         50000       X                   0              0      50000  

RAVINE BEECH CO INC            753865997          3,933,769.64         12887       X                   0              0      12887  

RAYTHEON CO B                  755111408            140,700.00          2400  X                        0              0       2400  
                                                 10,808,105.00        184360       X                   0              0     184360  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 10,948,805.00        186760                           0              0     186760  

REED & BARTON CORP             758140909         15,798,086.61          9402  X                        0              0       9402  
                                                    969,527.33           577       X                   0              0        577  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 16,767,613.94          9979                           0              0       9979  

RELIANT ENERGY INC             75952J108            256,246.51          9832       X                   0              0       9832  

RELIASTAR FINL CORP            75952U103            127,875.00          3000  X                        0              0       3000  
                                                  4,697,275.00        110200       X                   0              0     110200  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,825,150.00        113200                           0              0     113200  

ROCHDALE CORP                  7713159A8            240,125.00         21250       X                   0              0      21250  

SAFECO CORP                    786429100            214,316.10          5300       X                   0              0       5300  

SALEM OIL & GREASE             794438903            455,566.20           740       X                   0              0        740  

SAP AKTIENGESELLSCHAFT ADR     803054204          1,052,500.00         40000       X                   0              0      40000  

SAPIENT CORP                   803062108            413,975.00          5800       X                   0              0       5800  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 39,848,464.14        535794                           0              0     535794  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     27     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

SARA LEE CORP                  803111103            113,850.00          4600  X                        0              0       4600  
                                                  2,651,467.50        107130       X                   0              0     107130  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,765,317.50        111730                           0              0     111730  

SBC COMMUNICATIONS INC         78387G103          1,271,420.01         26944  X                        0              0      26944  
                                                  3,645,328.87         77252       X                   0              0      77252  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,916,748.88        104196                           0              0     104196  

SCHERING PLOUGH CORP           806605101          1,668,550.00         30200  X                        0              0      30200  
                                                 18,829,255.25        340801       X                   0              0     340801  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 20,497,805.25        371001                           0              0     371001  

SCHLUMBERGER LTD               806857108            244,361.25          4060  X                        0              0       4060  
                                                  8,065,185.27        134001       X                   0              0     134001  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  8,309,546.52        138061                           0              0     138061  

SEALED AIR CORP NEW            81211K100            368,906.25          7500  X                        0              0       7500  
                                                 13,178,118.26        267916       X                   0              0     267916  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 13,547,024.51        275416                           0              0     275416  

SEARS ROEBUCK & CO             812387108              3,389.06            75  X                        0              0         75  
                                                  1,241,978.46         27485       X                   0              0      27485  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,245,367.52         27560                           0              0      27560  

SHERWIN WILLIAMS CO            824348106            782,662.50         27828  X                        0              0      27828  
                                                 17,999,465.64        639981       X                   0              0     639981  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 18,782,128.14        667809                           0              0     667809  

SKLAR CORP                     8306299A1                  0.00         10000       X                   0              0      10000  

SOLUTIA INC                    834376105                695.00            40  X                        0              0         40  
                                                    218,577.50         12580       X                   0              0      12580  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 70,283,210.82       1718393                           0              0    1718393  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     28     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    219,272.50         12620                           0              0      12620  

SONAMED CORP                   8354099C9          1,952,000.00        488000       X                   0              0     488000  

SONAT INC                      835415100              6,000.00           200  X                        0              0        200  
                                                  1,746,000.00         58200       X                   0              0      58200  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,752,000.00         58400                           0              0      58400  

SPRINT CORP FON GROUP          852061100         91,658,268.16        934097  X                        0              0     934097  
                                                 11,012,470.71        112229       X                   0              0     112229  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                102,670,738.87       1046326                           0              0    1046326  

SPRINT CORP PCS SER 1          852061506         20,693,848.89        466998  X                        0              0     466998  
                                                  2,287,632.91         51625       X                   0              0      51625  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 22,981,481.80        518623                           0              0     518623  

ST PAUL COS INC                792860108            810,482.75         26092       X                   0              0      26092  

STAPLES INC                    855030102          1,302,507.51         39620  X                        0              0      39620  
                                                 17,454,028.13        530921       X                   0              0     530921  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 18,756,535.64        570541                           0              0     570541  

STATE STREET CORP              857477103          1,176,175.00         14300  X                        0              0      14300  
                                                 45,542,154.00        553704       X                   0              0     553704  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 46,718,329.00        568004                           0              0     568004  

STRYKER CORP                   863667101            453,937.50          9000  X                        0              0       9000  
                                                    438,806.25          8700       X                   0              0       8700  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    892,743.75         17700                           0              0      17700  

SUMMIT BANCORP                 866005101             87,750.00          2250  X                        0              0       2250  
                                                  6,033,300.00        154700       X                   0              0     154700  
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                202,655,361.81       3450636                           0              0    3450636  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     29     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,121,050.00        156950                           0              0     156950  

SUN MICROSYSTEMS INC           866810104            487,741.80          3900       X                   0              0       3900  

SUNTRUST BKS INC               867914103            385,701.00          6196  X                        0              0       6196  
                                                 19,568,225.25        314349       X                   0              0     314349  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 19,953,926.25        320545                           0              0     320545  

SYSCO CORP                     871829107            473,625.00         18000  X                        0              0      18000  
                                                  2,778,915.76        105612       X                   0              0     105612  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,252,540.76        123612                           0              0     123612  

SYSTEMSOFT CORP                871926101                981.40         14020       X                   0              0      14020  

TECO ENERGY INC                872375100          1,319,878.90         66409       X                   0              0      66409  

TEKTRONIX INC                  879131100             12,625.00           500  X                        0              0        500  
                                                  3,494,726.25        138405       X                   0              0     138405  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  3,507,351.25        138905                           0              0     138905  

TELEFONICA DE ESPANA S A ADR   879382208            255,500.00          2000       X                   0              0       2000  

TEMPLE INLAND INC              879868107            462,969.50          7378       X                   0              0       7378  

TERADYNE INC                   880770102          1,720,683.00         31536       X                   0              0      31536  

TEXACO INC                     881694103            121,728.75          2145  X                        0              0       2145  
                                                  6,432,726.00        113352       X                   0              0     113352  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,554,454.75        115497                           0              0     115497  

TEXAS INSTRS INC               882508104            729,487.50          7350  X                        0              0       7350  
                                                  3,873,231.25         39025       X                   0              0      39025  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 42,118,746.36        870177                           0              0     870177  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     30     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,602,718.75         46375                           0              0      46375  

THOMAS & BETTS CORP            884315102            225,375.00          6000       X                   0              0       6000  

TIME WARNER INC                887315109            495,687.50          7000  X                        0              0       7000  
                                                  6,610,488.51         93352       X                   0              0      93352  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,106,176.01        100352                           0              0     100352  

TIMES MIRROR CO NEW A          887364107            188,625.63          3485  X                        0              0       3485  
                                                    859,126.14         15873       X                   0              0      15873  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,047,751.77         19358                           0              0      19358  

TRANSFUSION TECHNOLOGIES       893650994            151,200.00         16800       X                   0              0      16800  

TRIBUNE CO                     896047107             65,437.50          1000  X                        0              0       1000  
                                                 68,477,988.00       1046464       X                   0              0    1046464  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 68,543,425.50       1047464                           0              0    1047464  

TRW INC                        872649108            797,615.00         17530  X                        0              0      17530  
                                                  4,735,367.00        104074       X                   0              0     104074  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  5,532,982.00        121604                           0              0     121604  

TYCO INTL LTD NEW              902124106         77,101,976.00       1074592       X                   0              0    1074592  

U S WEST INC NEW               91273H101              8,094.19           147  X                        0              0        147  
                                                    428,661.56          7785       X                   0              0       7785  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    436,755.75          7932                           0              0       7932  

UNION CAMP CORP                905530101             26,850.00           400  X                        0              0        400  
                                                    318,843.75          4750       X                   0              0       4750  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    345,693.75          5150                           0              0       5150  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                160,491,335.78       2399252                           0              0    2399252  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     31     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

UNION PAC CORP                 907818108             42,750.00           800  X                        0              0        800  
                                                  1,327,280.64         24838       X                   0              0      24838  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,370,030.64         25638                           0              0      25638  

UNITED PARCEL SVC AMER         911308104             24,940.00           580  X                        0              0        580  
                                                 42,204,543.00        981501       X                   0              0     981501  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 42,229,483.00        982081                           0              0     982081  

UNITED TECHNOLOGIES CORP       913017109          1,793,192.51         13240  X                        0              0      13240  
                                                 31,435,179.32        232101       X                   0              0     232101  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                 33,228,371.83        245341                           0              0     245341  

UNOCAL CORP                    915289102            379,075.00         10280       X                   0              0      10280  

US BANCORP DEL                 902973106            374,755.63         11002  X                        0              0      11002  
                                                  6,328,505.97        185791       X                   0              0     185791  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  6,703,261.60        196793                           0              0     196793  

UST INC                        902911106            845,143.75         32350       X                   0              0      32350  

USX-MARATHON GROUP             902905827            977,790.00         35556       X                   0              0      35556  

VALSPAR CORP                   920355104            310,006.88          9822  X                        0              0       9822  

VARIAN ASSOC INC               922204102          2,085,137.50         53810       X                   0              0      53810  

VERITAS SOFTWARE CORP          923436109             24,225.00           300  X                        0              0        300  
                                                    726,750.00          9000       X                   0              0       9000  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    750,975.00          9300                           0              0       9300  

VERTEX PHARMACEUTICALS         92532F100             61,231.25          2425  X                        0              0       2425  
                                                  7,146,709.50        283038       X                   0              0     283038  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 96,087,215.95       1886434                           0              0    1886434  
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                  <C>                                                        <C> 
REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     32     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          


 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      

<CAPTION> 
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C> 
         COMMON (cont.)                                                                                                             
         --------------                                                                                                             

                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  7,207,940.75        285463                           0              0     285463  

VICOR CORP                     925815102          3,582,750.00        286620       X                   0              0     286620  

VULCAN POWER CO CL A COMMON    929187995                  0.00        206791       X                   0              0     206791  

WACHOVIA CORP NEW              929771103              8,118.75           100  X                        0              0        100  
                                                  4,276,145.63         52670       X                   0              0      52670  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,284,264.38         52770                           0              0      52770  

WAL MART STORES INC            931142103            553,125.00          6000  X                        0              0       6000  
                                                  3,987,662.51         43256       X                   0              0      43256  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,540,787.51         49256                           0              0      49256  

WALGREEN CO                    931422109            161,025.00          5700  X                        0              0       5700  
                                                  2,808,050.00         99400       X                   0              0      99400  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  2,969,075.00        105100                           0              0     105100  

WARNER LAMBERT CO              934488107            159,000.00          2400  X                        0              0       2400  
                                                  4,575,688.75         69067       X                   0              0      69067  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  4,734,688.75         71467                           0              0      71467  

WASHINGTON MUTUAL INC          939322103            196,608.75          4810  X                        0              0       4810  
                                                  1,673,422.50         40940       X                   0              0      40940  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,870,031.25         45750                           0              0      45750  

WASHINGTON POST CO CL B        939640108         15,564,167.50         29845       X                   0              0      29845  

WATSON PHARMACEUTICALS INC     942683103            498,612.50         11300  X                        0              0      11300  

WELLS FARGO & CO               949746101            266,825.63          7610  X                        0              0       7610  
                                                    215,949.93          6159       X                   0              0       6159  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                 38,527,152.45        872668                           0              0     872668  
</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     33     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         
                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         COMMON (cont.)                                                                                                             
         --------------                                                                                                             
<S>                            <C>           <C>               <C>            <C>           <C>               <C>        <C>     
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    482,775.56         13769                           0              0      13769  

WEST PHARMACEUTICAL SERVICES   955306105            318,750.00         10000       X                   0              0      10000  
INC                                                                                                                                 

WEYERHAEUSER CO                962166104          1,570,650.00         28300       X                   0              0      28300  

WHOLE FOODS MKT INC            966837106             18,906.25           550  X                        0              0        550  
                                                    589,875.00         17160       X                   0              0      17160  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    608,781.25         17710                           0              0      17710  

WILEY JOHN & SONS INC          968223305            655,000.00         16000       X                   0              0      16000  

WILEY JOHN & SONS INC A        968223206          1,008,000.00         24000       X                   0              0      24000  

WILLIAMS COS INC               969457100             39,500.00          1000  X                        0              0       1000  
                                                    302,175.00          7650       X                   0              0       7650  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    341,675.00          8650                           0              0       8650  

WILMINGTON TR CORP             971807102            822,600.00         14400       X                   0              0      14400  

WISCONSIN ENERGY CORP          976657106          1,942,959.39         74550       X                   0              0      74550  

WPS RES CORP                   92931B106            495,600.00         16800       X                   0              0      16800  

WYMAN GORDON CO                983085101            552,215.75         59699       X                   0              0      59699  

XEROX CORP                     984121103            497,793.75          9550  X                        0              0       9550  
                                                  9,013,246.50        172916       X                   0              0     172916  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  9,511,040.25        182466                           0              0     182466  

                                             ================= ==============               =============     ========== ========== 
TOTALS FOR COMMON                             3,100,778,661.94      56075638                           0              0   56075638  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 


REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     34     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         PREFERRED                                                                                                                  
         ---------                                                                                                                  
<S>                            <C>           <C>               <C>            <C>  <C>      <C>               <C>        <C>    
AIRTOUCH COMM CV $1.740 PFD    00949T209            242,550.00          3080       X                   0              0       3080  
Ser B                                                                                                                               

AMERICAN EXPRESS 7% CAPITAL TR 02583Y205            250,000.00         10000       X                   0              0      10000  
$1.75 PFD                                                                                                                           

BIZFON INC PFD Ser A           0910999A1             10,000.00         10000  X                        0              0      10000  
                                                    504,000.00        504000       X                   0              0     504000  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    514,000.00        514000                           0              0     514000  

BIZFON INC PFD Ser B           0910999B9            471,768.10        248299       X                   0              0     248299  

CABLESOFT CORP CV PFD Ser A    126910991             10,020.00         16700  X                        0              0      16700  
                                                    699,755.40       1166259       X                   0              0    1166259  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    709,775.40       1182959                           0              0    1182959  

CABLESOFT CORP CV PFD Ser B    126910983            209,460.00         41892       X                   0              0      41892  

CABLESOFT CORP CV PFD Ser D    126910967            184,424.41        322743       X                   0              0     322743  

CAIRNSTONE INC CV PFD Ser A    1277669D7                  0.00         11111       X                   0              0      11111  

CENDANT CORP INCOME PRIDES     151313301            478,287.50         16600       X                   0              0      16600  
$3.75 PFD                                                                                                                           

CIPHERGEN BIOSYSTEMS INC PFD   172922916            120,000.00         60000       X                   0              0      60000  
Ser D                                                                                                                               

CORPORATION FOR LASER OPTICS   2200359B7             10,000.00          2500  X                        0              0       2500  
RESEARCH PFD Ser B                                                                                                                  
                                                    208,000.00         52000       X                   0              0      52000  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    218,000.00         54500                           0              0      54500  

DELPHI INTERNET SVS CV PFD Ser 2471829A8            454,005.00         30267       X                   0              0      30267  
B
                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                  3,852,270.41       2495451                           0              0    2495451  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     35     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         
                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         PREFERRED (cont.)                                                                                                          
         -----------------                                                                                                          
<S>                            <C>           <C>               <C>            <C>  <C> <C>  <C>               <C>        <C>  
EDUCATION PARTNERS L P CV PFD  2813909A4            241,387.50         15700       X                   0              0      15700  
Ser C                                                                                                                               

EMPOWER PFD Ser B              2921999B4            220,500.00         63000       X                   0              0      63000  

FAXNET CORPORATION PFD Ser D   3121019D2            808,000.00           808       X                   0              0        808  

FAXNET CV PFD Ser B            3121019A8             10,000.00            10  X                        0              0         10  
                                                    650,000.00           650       X                   0              0        650  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    660,000.00           660                           0              0        660  

GENERAL ORTHOPEDICS CV PFD Ser 371990979             85,000.00         42500       X                   0              0      42500  
C                                                                                                                                   

GENERAL ORTHOPEDICS CV PFD Ser 371990953            171,500.00         42875       X                   0              0      42875  
E                                                                                                                                   

GENERAL ORTHOPEDICS CV PFD Ser 371990920             20,000.00          4000  X                        0              0       4000  
F                                                                                                                                   
                                                    468,000.00         93600       X                   0              0      93600  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    488,000.00         97600                           0              0      97600  

GENERAL ORTHOPEDICS PFD Ser D  371990961            354,000.00        118000       X                   0              0     118000  

GLOBALSTAR TELECOMM LTD $4.000 379364508             11,775.00           300  X                        0              0        300  
PFD                                                                                                                                 
                                                    431,750.00         11000       X                   0              0      11000  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    443,525.00         11300                           0              0      11300  

IBM CORP DEP SH REP 1/4 $1.875 459200309             27,312.50          1000  X                        0              0       1000  
PFD Ser A                                                                                                                           
                                                    619,993.75         22700       X                   0              0      22700  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    647,306.25         23700                           0              0      23700  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                  4,119,218.75        416143                           0              0     416143  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     36     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         
                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         PREFERRED (cont.)                                                                                                          
         -----------------                                                              
<S>                            <C>           <C>               <C>            <C>  <C>      <C>               <C>        <C>   
INTERNET COMMERCE SVCS CO CV   4605679A0            720,000.00        720000       X                   0              0     720000  
PFD Ser A                                                                                                                           

MARATHON TECHNOLOGIES CORP CV  565915998            605,000.00        121000       X                   0              0     121000  
PFD Ser A                                                                                                                           

MARATHON TECHNOLOGIES CORP CV  565915980             45,000.00          5625  X                        0              0       5625  
PFD Ser B                                                                                                                           
                                                    935,000.00        116875       X                   0              0     116875  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    980,000.00        122500                           0              0     122500  

MARATHON TECHNOLOGIES CORP CV  5659159A5            542,364.00         45197       X                   0              0      45197  
PFD Ser D                                                                                                                           

MEDIA ONE GROUP INC PFD Ser D  58440J203          1,681,597.51         13080       X                   0              0      13080  

NETWORKS ON-LINE INC CV PFD    641218912                  0.00          6376  X                        0              0       6376  
Ser B                                                                                                                               
                                                          0.00         48624       X                   0              0      48624  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                          0.00         55000                           0              0      55000  

NOBLENET INC PFD Ser A         6550989A1            350,000.00        280000       X                   0              0     280000  

PACIFIC FIBEROPTICS INC PFD    694240995             50,000.00         20000       X                   0              0      20000  
Ser D                                                                                                                               

PACIFIC TELESIS FING II $2.125 694889205             51,625.00          2000  X                        0              0       2000  
PFD                                                                                                                                 
                                                    397,512.50         15400       X                   0              0      15400  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    449,137.50         17400                           0              0      17400  

QUICKBUY INC CV PFD Ser B      7484499A5            776,925.00        103590       X                   0              0     103590  

RELIASTAR FING II $2.025 PFD   75952F205             51,000.00          2000  X                        0              0       2000  
                                                  1,139,850.00         44700       X                   0              0      44700  

                                             ----------------- --------------               -------------     ---------- ---------- 
         SUBTOTALS FOR THIS PAGE                  7,345,874.01       1544467                           0              0    1544467  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     37     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         
                                                          As of 03/31/1999                                                          

 HOLDING COMPANY: (2) WELCH AND FORBES (Cont.)                                                                                      
                                                                              INVEST                                                
                                                  MARKET                      INVEST AUTH   VOTING AUTH (SHARES)                    
NAME OF ISSUER                 CUSIP              VALUE            SH/PV      SOLE SHR MGR      SOLE            SHARED      NONE    
- ------------------------------ ------------  ----------------- ------------   ---- --- ---- -----------       ---------- ---------- 

         PREFERRED (cont.)                                                                                                         
         -----------------                                                                                                          

<S>                            <C>           <C>               <C>            <C>  <C>      <C>               <C>        <C>   
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                  1,190,850.00         46700                           0              0      46700  

RSP FINE CHEMICALS INC CV PFD  7496999A4             50,000.00         10000       X                   0              0      10000  
Ser A                                                                                                                               

SPECTRA SCIENCE CORP CONV PFD  847619996            104,917.50         46630  X                        0              0      46630  
Ser A                                                                                                                               
                                                    732,690.00        325640       X                   0              0     325640  
                                             ----------------- --------------               -------------     ---------- ---------- 
                                                    837,607.50        372270                           0              0     372270  

SURGICAL SEALANTS INC CV PFD   8688889A8            275,025.00          7334       X                   0              0       7334  
Ser A                                                                                                                               

SURGICAL SEALANTS INC CV PFD   8688889B6            480,000.00          7680       X                   0              0       7680  
Ser B                                                                                                                               

                                             ================= ==============               =============     ========== ========== 
TOTALS FOR PREFERRED                             16,959,995.67       4853345                           0              0    4853345  

                                             ================= ==============               =============     ========== ========== 
GRAND TOTALS                                  3,117,738,657.61      60928983                           0              0   60928983  

</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 

REPORT RUN: 04/22/1999 at 10:44 AM                   EQUITIES DISCLOSURE (13-F)                                     PAGE     38     
BUSINESS DATE: 04/22/1999                                                                                       R33.002.001         

                                                          As of 03/31/1999                                                          

                                                  Produced on trust2>WELCHDB                                                        

                                     The parameters used in producing report R33.002.001 were:
                            <S>                              <C>                               <C>   
                            ASOF##                           =                                 03/31/1999                           
                            BK_LIST##                        =                                         ()                           
                            DV_SUM#                          =                                        YES                           
                            BK_SUM#                          =                                         NO                           
                            MIN_SHARES#                      =                                     10,000                           
                            MIN_CORP_SHARES#                 =                                     10,000                           
                            MIN_MKT_VAL#                     =                                 200,000.00                           

              ============================================= End of Report =============================================             

</TABLE> 


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