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

                                   FORM 13F

                             FORM 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: September 30, 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   October 19, 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:  61

Form 13F Information Table Value Total:  $1374207071



List of Other Included Managers:

No.   13F File Number    Name





                                                                               
                                                             VALUE    SHARES/ SH/ PUT/ INVSTMT            -----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    26230  1000000 SH       SOLE                1000000        0        0
Arch Capital Group Ltd.          COMMON           G0450A105    24927   335000 SH       SOLE                 335000        0        0
Adams Express Company            COMMON           006212104     1657   110806 SH       SOLE                 110806        0        0
American International Group,Inc COMMON           026874107    21986   325000 SH       SOLE                 325000        0        0
Alexander & Baldwin, Inc.        COMMON           014482103    11836   236100 SH       SOLE                 236100        0        0
Alkermes, Inc.                   COMMON           01642T108     1472    80000 SH       SOLE                  80000        0        0
The Allstate Corporation         COMMON           020002101    15727   275000 SH       SOLE                 275000        0        0
Ameriprise Financial, Inc.       COMMON           03076C106     3787    60000 SH       SOLE                  60000        0        0
Apache Corporation               COMMON           037411105    54036   600000 SH       SOLE                 600000        0        0
Activision, Inc.                 COMMON           004930202    15113   700000 SH       SOLE                 700000        0        0
Avaya Inc.                       COMMON           053499109     1526    90000 SH       SOLE                  90000        0        0
AXIS Capital Holdings Limited    COMMON           G0692U109    14202   365000 SH       SOLE                 365000        0        0
Bank of America Corporation      COMMON           060505104    10054   200000 SH       SOLE                 200000        0        0
BearingPoint, Inc.               COMMON           074002106     7108  1755000 SH       SOLE                1755000        0        0
Biogen Idec Inc.                 COMMON           09062X103     6633   100000 SH       SOLE                 100000        0        0
Berkshire Hathaway Inc. Class A  COMMON           084670108    32590      275 SH       SOLE                    275        0        0
CB Richard Ellis Group, Inc.     COMMON           12497T101    13953   501200 SH       SOLE                 501200        0        0
Central Securities Corporation   COMMON           155123102      798    28226 SH       SOLE                  28226        0        0
Costco Wholesale Corporation     COMMON           22160K105    35288   575000 SH       SOLE                 575000        0        0
Carpenter Technology Corporation COMMON           144285103    19567   150500 SH       SOLE                 150500        0        0
Cisco Systems, Inc.              COMMON           17275R102    29817   900000 SH       SOLE                 900000        0        0
CEMEX, S.A. de C.V. ADR          COMMON           151290889    68232  2280483 SH       SOLE                2280483        0        0
Cytokinetics, Incorporated       COMMON           23282W100     3097   604900 SH       SOLE                 604900        0        0
Dell Inc.                        COMMON           24702R101    42780  1550000 SH       SOLE                1550000        0        0
Diageo plc ADR                   COMMON           25243Q205    30706   350000 SH       SOLE                 350000        0        0
Genentech, Inc.                  COMMON           368710406    15604   200000 SH       SOLE                 200000        0        0
Fidelity National Financial, Inc COMMON           31620R105    15732   900000 SH       SOLE                 900000        0        0
Gilead Sciences, Inc.            COMMON           375558103     4884   119500 SH       SOLE                 119500        0        0
Halliburton Company              COMMON           406216101    30720   800000 SH       SOLE                 800000        0        0
The Home Depot, Inc.             COMMON           437076102    41458  1278000 SH       SOLE                1278000        0        0
Hewitt Associates, Inc.Class A   COMMON           42822Q100    22082   630000 SH       SOLE                 630000        0        0
Intermec, Inc.                   COMMON           458786100     3396   130000 SH       SOLE                 130000        0        0
Lamar Advertising Company        COMMON           512815101    19588   400000 SH       SOLE                 400000        0        0
Leap Wireless International, Inc COMMON           521863308    12409   152500 SH       SOLE                 152500        0        0
Lowe's Companies, Inc.           COMMON           548661107     4904   175000 SH       SOLE                 175000        0        0
MetLife, Inc.                    COMMON           59156R108    17433   250000 SH       SOLE                 250000        0        0
Microsoft Corporation            COMMON           594918104    21211   720000 SH       SOLE                 720000        0        0
M&T Bank Corporation             COMMON           55261F104    31035   300000 SH       SOLE                 300000        0        0
Nelnet, Inc.                     COMMON           64031N108    16872   925000 SH       SOLE                 925000        0        0
NetEase.com, Inc.                COMMON           64110W102     4141   245000 SH       SOLE                 245000        0        0
MetroPCS Communications Inc.     COMMON           591708102     8263   302900 SH       SOLE                 302900        0        0
PepsiCo, Inc.                    COMMON           713448108    18315   250000 SH       SOLE                 250000        0        0
PartnerRe Ltd.                   COMMON           G6852T105    24487   310000 SH       SOLE                 310000        0        0
Patterson-UTI Energy, Inc.       COMMON           703481101    22570  1000000 SH       SOLE                1000000        0        0
QUALCOMM Incorporated            COMMON           747525103    33808   800000 SH       SOLE                 800000        0        0
Everest Re Group, Ltd.           COMMON           G3223R108    38584   350000 SH       SOLE                 350000        0        0
Republic Services, Inc.          COMMON           760759100    28834   881500 SH       SOLE                 881500        0        0
Royce Value Trust                COMMON           780910105     2262   117083 SH       SOLE                 117083        0        0
Sprint Nextel Corporation        COMMON           852061100    25175  1325000 SH       SOLE                1325000        0        0
Target Corporation               COMMON           87612E106    33883   533000 SH       SOLE                 533000        0        0
THQ Inc.                         COMMON           872443403     7869   315000 SH       SOLE                 315000        0        0
The TJX Companies, Inc.          COMMON           872540109    61047  2100000 SH       SOLE                2100000        0        0
Talisman Energy Inc.             COMMON           87425E103    59100  3000000 SH       SOLE                3000000        0        0
Transatlantic Holdings, Inc.     COMMON           893521104    10901   155000 SH       SOLE                 155000        0        0
Textron Inc.                     COMMON           883203101    31715   509800 SH       SOLE                 509800        0        0
United Technologies Corporation  COMMON           913017109    26156   325000 SH       SOLE                 325000        0        0
Wachovia Corporation             COMMON           929903102    32598   650000 SH       SOLE                 650000        0        0
Weatherford International Ltd.   COMMON           G95089101    68860  1025000 SH       SOLE                1025000        0        0
Waste Management, Inc.           COMMON           94106L109    25663   680000 SH       SOLE                 680000        0        0
Wal-Mart Stores, Inc.            COMMON           931142103    20516   470000 SH       SOLE                 470000        0        0
Xerox Corporation                COMMON           984121103    39015  2250000 SH       SOLE                2250000        0        0