UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                   FORM 13F

                             FORM 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: March 31, 2007

Check here if Amendment [ ]; Amendment Number:
This Amendment (Check only one.): [ ] is a restatement.
                                  [ ] adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:GENERAL AMERICAN INVESTORS COMPANY, INC.
Address: 450 Lexington Ave, Suite 3300
         New York, NY 10017

13F File Number: 28-461

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.




Person Signing this Report on Behalf of Reporting Manager:

Name: Eugene S. Stark
Title: Vice-President, Administration
Phone: 212-916-8447
Signature, Place, and Date of Signing:

  Eugene S. Stark   New York, NY   April 27, 2007


Report Type (Check only one.):

[X]    13F HOLDINGS REPORT.

[ ]    13F NOTICE.

[ ]    13F COMBINATION REPORT.


List of Other Managers Reporting for this Manager:

        Form 13F File Number                Name


I AM SIGNING THIS REPORT AS REQUIRED BY THE SECURITIES EXCHANGE ACT OF 1934.


FORM 13F SUMMARY PAGE


Report Summary:

Number of Other Included Managers:       0

Form 13F Information Table Entry Total:  59

Form 13F Information Table Value Total:  $1294609347



List of Other Included Managers:

No.   13F File Number    Name




   COLUMN 1                           COLUMN 2     COLUMN 3  COLUMN 4      COLUMN 5    COLUMN 6  COLUMN 7         COLUMN 8
 --------------                      ---------    ---------  -------- -------------    --------  --------    ------------------
                                                             VALUE    SHARES/ SH/ PUT/ INVSTMT   OTHER    -----VOTING AUTHORITY-----
  NAME OF ISSUER                 -TITLE OF CLASS- --CUSIP-- x$1000    PRN AMT PRN CALL DSCRETN -MANAGERS-     SOLE   SHARED     NONE
                                                                                                      
ABB Ltd. ADR                     COMMON           000375204    19757  1150000 SH       SOLE                1150000        0        0
Arch Capital Group Ltd.          COMMON           G0450A105    22850   335000 SH       SOLE                 335000        0        0
Adams Express Company            COMMON           006212104     1554   110806 SH       SOLE                 110806        0        0
American International Group,Inc COMMON           026874107    22519   335000 SH       SOLE                 335000        0        0
Alexander & Baldwin, Inc.        COMMON           014482103    10648   211100 SH       SOLE                 211100        0        0
Alkermes, Inc.                   COMMON           01642T108     1544   100000 SH       SOLE                 100000        0        0
The Allstate Corporation         COMMON           020002101    17117   285000 SH       SOLE                 285000        0        0
Ameriprise Financial, Inc.       COMMON           03076C106     3428    60000 SH       SOLE                  60000        0        0
American Tower Corporation       COMMON           029912201     3895   100000 SH       SOLE                 100000        0        0
Apache Corporation               COMMON           037411105    58328   825000 SH       SOLE                 825000        0        0
Activision, Inc.                 COMMON           004930202    13258   700000 SH       SOLE                 700000        0        0
Avaya Inc.                       COMMON           053499109     6555   555000 SH       SOLE                 555000        0        0
AXIS Capital Holdings Limited    COMMON           G0692U109    13544   400000 SH       SOLE                 400000        0        0
Bank of America Corporation      COMMON           060505104    13775   270000 SH       SOLE                 270000        0        0
BearingPoint, Inc.               COMMON           074002106     9575  1250000 SH       SOLE                1250000        0        0
Biogen Idec Inc.                 COMMON           09062X103     7545   170000 SH       SOLE                 170000        0        0
Berkshire Hathaway Inc. Class A  COMMON           084670108    29972      275 SH       SOLE                    275        0        0
Cephalon, Inc.                   COMMON           156708109     3561    50000 SH       SOLE                  50000        0        0
Central Securities Corporation   COMMON           155123102      758    28226 SH       SOLE                  28226        0        0
Costco Wholesale Corporation     COMMON           22160K105    37688   700000 SH       SOLE                 700000        0        0
Cisco Systems, Inc.              COMMON           17275R102    22977   900000 SH       SOLE                 900000        0        0
CEMEX, S.A. de C.V. ADR          COMMON           151290889    72897  2225862 SH       SOLE                2225862        0        0
Cytokinetics, Incorporated       COMMON           23282W100     4210   604900 SH       SOLE                 604900        0        0
Dell Inc.                        COMMON           24702R101    24394  1051000 SH       SOLE                1051000        0        0
Diageo plc ADR                   COMMON           25243Q205    28333   350000 SH       SOLE                 350000        0        0
Dollar General Corporation       COMMON           256669102    41771  1975000 SH       SOLE                1975000        0        0
Genentech, Inc.                  COMMON           368710406    16424   200000 SH       SOLE                 200000        0        0
Halliburton Company              COMMON           406216101    26979   850000 SH       SOLE                 850000        0        0
The Home Depot, Inc.             COMMON           437076102    57682  1570000 SH       SOLE                1570000        0        0
Intermec, Inc.                   COMMON           458786100     2904   130000 SH       SOLE                 130000        0        0
Lamar Advertising Company        COMMON           512815101    20409   324100 SH       SOLE                 324100        0        0
Medtronic, Inc.                  COMMON           585055106    11774   240000 SH       SOLE                 240000        0        0
MedImmune, Inc.                  COMMON           584699102    12918   355000 SH       SOLE                 355000        0        0
MetLife, Inc.                    COMMON           59156R108    17366   275000 SH       SOLE                 275000        0        0
MFA Mortgage Investments, Inc.   COMMON           55272X102     7123   925000 SH       SOLE                 925000        0        0
Microsoft Corporation            COMMON           594918104    20066   720000 SH       SOLE                 720000        0        0
M&T Bank Corporation             COMMON           55261F104    34749   300000 SH       SOLE                 300000        0        0
Nelnet, Inc.                     COMMON           64031N108    10787   450000 SH       SOLE                 450000        0        0
NetEase.com, Inc.                COMMON           64110W102     3814   215000 SH       SOLE                 215000        0        0
PepsiCo, Inc.                    COMMON           713448108    14937   235000 SH       SOLE                 235000        0        0
Pfizer Inc                       COMMON           717081103    13337   528000 SH       SOLE                 528000        0        0
PartnerRe Ltd.                   COMMON           G6852T105    21590   315000 SH       SOLE                 315000        0        0
Patterson-UTI Energy, Inc.       COMMON           703481101    22440  1000000 SH       SOLE                1000000        0        0
QUALCOMM Incorporated            COMMON           747525103    29862   700000 SH       SOLE                 700000        0        0
Everest Re Group, Ltd.           COMMON           G3223R108    45200   470000 SH       SOLE                 470000        0        0
Republic Services, Inc.          COMMON           760759100    49033  1762500 SH       SOLE                1762500        0        0
Rio Tinto plc ADR                COMMON           767204100    14808    65000 SH       SOLE                  65000        0        0
Royce Value Trust                COMMON           780910105     2468   111930 SH       SOLE                 111930        0        0
Sprint Nextel Corporation        COMMON           852061100    22468  1185000 SH       SOLE                1185000        0        0
SunTrust Banks, Inc.             COMMON           867914103    13286   160000 SH       SOLE                 160000        0        0
THQ Inc.                         COMMON           872443403    10770   315000 SH       SOLE                 315000        0        0
The TJX Companies, Inc.          COMMON           872540109    56616  2100000 SH       SOLE                2100000        0        0
Talisman Energy Inc.             COMMON           87425E103    52680  3000000 SH       SOLE                3000000        0        0
Transatlantic Holdings, Inc.     COMMON           893521104    13350   205000 SH       SOLE                 205000        0        0
Textron Inc.                     COMMON           883203101    22450   250000 SH       SOLE                 250000        0        0
Wachovia Corporation             COMMON           929903102    33848   614864 SH       SOLE                 614864        0        0
Weatherford International Ltd.   COMMON           G95089101    55022  1220000 SH       SOLE                1220000        0        0
Wal-Mart Stores, Inc.            COMMON           931142103    26996   575000 SH       SOLE                 575000        0        0
Xerox Corporation                COMMON           984121103    38003  2250000 SH       SOLE                2250000        0        0