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, 2006

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. 13F File No. 28-461
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 20, 2006


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:  57

Form 13F Information Table Value Total:  $1241775239



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    15157  1150000 SH       SOLE                1150000        0        0
Arch Capital Group Ltd.          COMMON           G0450A105    22222   350000 SH       SOLE                 350000        0        0
Adams Express Company            COMMON           006212104     1421   105075 SH       SOLE                 105075        0        0
American International Group,Inc COMMON           026874107    24848   375000 SH       SOLE                 375000        0        0
Alkermes, Inc.                   COMMON           01642T108     3804   240000 SH       SOLE                 240000        0        0
The Allstate Corporation         COMMON           020002101    17251   275000 SH       SOLE                 275000        0        0
Ameriprise Financial, Inc.       COMMON           03076C106     2814    60000 SH       SOLE                  60000        0        0
American Tower Corporation       COMMON           029912201    28288   775000 SH       SOLE                 775000        0        0
Apache Corporation               COMMON           037411105    52140   825000 SH       SOLE                 825000        0        0
Activision, Inc.                 COMMON           004930202     9438   625000 SH       SOLE                 625000        0        0
Avaya Inc.                       COMMON           053499109     6006   525000 SH       SOLE                 525000        0        0
AXIS Capital Holdings Limited    COMMON           G0692U109    13876   400000 SH       SOLE                 400000        0        0
Bank of America Corporation      COMMON           060505104    14464   270000 SH       SOLE                 270000        0        0
Bed Bath & Beyond Inc.           COMMON           075896100     7652   200000 SH       SOLE                 200000        0        0
Biogen Idec Inc.                 COMMON           09062X103     7596   170000 SH       SOLE                 170000        0        0
Berkshire Hathaway Inc. Class A  COMMON           084670108    28740      300 SH       SOLE                    300        0        0
Cephalon, Inc.                   COMMON           156708109     9263   150000 SH       SOLE                 150000        0        0
Central Securities Corporation   COMMON           155123102      675    26055 SH       SOLE                  26055        0        0
Costco Wholesale Corporation     COMMON           22160K105    34776   700000 SH       SOLE                 700000        0        0
Cisco Systems, Inc.              COMMON           17275R102    20682   900000 SH       SOLE                 900000        0        0
CEMEX, S.A. de C.V. ADR          COMMON           151290889    70714  2350862 SH       SOLE                2350862        0        0
Cytokinetics, Incorporated       COMMON           23282W100     3890   604900 SH       SOLE                 604900        0        0
Diageo plc ADR                   COMMON           25243Q205    24864   350000 SH       SOLE                 350000        0        0
Dollar General Corporation       COMMON           256669102    21794  1599000 SH       SOLE                1599000        0        0
Genentech, Inc.                  COMMON           368710406    16540   200000 SH       SOLE                 200000        0        0
EMC Corporation                  COMMON           268648102     3594   300000 SH       SOLE                 300000        0        0
Golden West Financial            COMMON           381317106    45191   585000 SH       SOLE                 585000        0        0
Halliburton Company              COMMON           406216101    24183   850000 SH       SOLE                 850000        0        0
The Home Depot, Inc.             COMMON           437076102    56944  1570000 SH       SOLE                1570000        0        0
Intermec, Inc.                   COMMON           458786100     2109    80000 SH       SOLE                  80000        0        0
Lamar Advertising Company        COMMON           512815101    18694   350000 SH       SOLE                 350000        0        0
Medtronic, Inc.                  COMMON           585055106    20898   450000 SH       SOLE                 450000        0        0
MedImmune, Inc.                  COMMON           584699102    11123   380000 SH       SOLE                 380000        0        0
MetLife, Inc.                    COMMON           59156R108    16154   285000 SH       SOLE                 285000        0        0
MFA Mortgage Investments, Inc.   COMMON           55272X102     8009  1075000 SH       SOLE                1075000        0        0
Molex Incorporated Class A       COMMON           608554200    18101   550000 SH       SOLE                 550000        0        0
Microsoft Corporation            COMMON           594918104    21880   800000 SH       SOLE                 800000        0        0
M&T Bank Corporation             COMMON           55261F104    37188   310000 SH       SOLE                 310000        0        0
Annaly Capital Management, Inc.  COMMON           035710409     8607   655000 SH       SOLE                 655000        0        0
PepsiCo, Inc.                    COMMON           713448108    11421   175000 SH       SOLE                 175000        0        0
Pfizer Inc                       COMMON           717081103    49261  1737000 SH       SOLE                1737000        0        0
PartnerRe Ltd.                   COMMON           G6852T105    22636   335000 SH       SOLE                 335000        0        0
Patterson-UTI Energy, Inc.       COMMON           703481101    23760  1000000 SH       SOLE                1000000        0        0
Everest Re Group, Ltd.           COMMON           G3223R108    52179   535000 SH       SOLE                 535000        0        0
Republic Services, Inc.          COMMON           760759100    47247  1175000 SH       SOLE                1175000        0        0
Rio Tinto plc ADR                COMMON           767204100    12326    65000 SH       SOLE                  65000        0        0
Royce Value Trust                COMMON           780910105     2458   120258 SH       SOLE                 120258        0        0
SunTrust Banks, Inc.             COMMON           867914103    13138   170000 SH       SOLE                 170000        0        0
Constellation Brands, Inc.       COMMON           21036P108     9354   325000 SH       SOLE                 325000        0        0
THQ Inc.                         COMMON           872443403     6272   215000 SH       SOLE                 215000        0        0
The TJX Companies, Inc.          COMMON           872540109    65590  2340000 SH       SOLE                2340000        0        0
Talisman Energy Inc.             COMMON           87425E103    49140  3000000 SH       SOLE                3000000        0        0
Transatlantic Holdings, Inc.     COMMON           893521104    13894   230000 SH       SOLE                 230000        0        0
VeriSign, Inc.                   COMMON           92343E102     2697   133500 SH       SOLE                 133500        0        0
Weatherford International Ltd.   COMMON           G95089101    50898  1220000 SH       SOLE                1220000        0        0
Wal-Mart Stores, Inc.            COMMON           931142103    28359   575000 SH       SOLE                 575000        0        0
Xerox Corporation                COMMON           984121103    29564  1900000 SH       SOLE                1900000        0        0