UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: December 31, 2003 Institutional Investment Manager Filing this Report: Name: General American Investors Company, Inc. Address: 450 Lexington Avenue, 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: Name: Eugene L. DeStaebler, Jr. Title: Vice-President, Administration Phone: 212-916-8400 Signature, Place and Date of Signing: Eugene L. DeStaebler, Jr. New York, NY February 11, 2004 Report Type (Check only one.): [x] 13F HOLDINGS REPORT [ ] 13F NOTICE [ ] 13F COMBINATION REPORT List of Other Managers Reporting for this Manager: NONE 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: 58 Form 13F Information Table Value Total: $938,921,617 NAME OF ISSUER TITLE CUSIP FAIR SHARES OR INVEST. DISC. OTHER VOTING AUTHORITY OF NUMBER MARKET PRINCIPAL SH/ SHARED MGRS. CLASS VALUE AMOUNT PRN SOLE SHARED OTHER SOLE SHARED NONE (A) (B) (C) (A) (B) (C) ---------------------------------------------------------------------------------------------------------------------------------- Adams Express Company COMMON 006212104 1,167,657 94,090 N X 94,090 American International Gro COMMON 026874107 21,541,000 325,000 N X 325,000 Alkermes, Inc. COMMON 01642T108 4,590,000 340,000 N X 340,000 Applied Materials, Inc. COMMON 038222105 4,488,000 200,000 N X 200,000 Annuity and Life Re (Holdi COMMON G03910109 1,380,000 1,000,000 N X 1,000,000 ASM International N.V. COMMON N07045102 5,060,000 250,000 N X 250,000 Bank of America Corporatio COMMON 060505104 8,043,000 100,000 N X 100,000 Baxter International Inc. COMMON 071813109 27,468,000 900,000 N X 900,000 Bancroft Convertible Fund COMMON 059695106 390,400 20,877 N X 20,877 Biogen Idec Inc. COMMON 09062X103 10,092,500 275,000 N X 275,000 Bristol-Myers Squibb Compa COMMON 110122108 8,580,000 300,000 N X 300,000 Berkshire Hathaway Inc. COMMON 084670108 25,275,000 300 N X 300 Brooks Automation, Inc. COMMON 114340102 11,668,210 491,500 N X 491,500 Coca-Cola Enterprises Inc. COMMON 191219104 6,014,250 275,000 N X 275,000 Central Securities Corpora COMMON 155123102 2,361,406 113,040 N X 113,040 CIENA Corporation COMMON 171779101 3,608,000 550,000 N X 550,000 Costco Wholesale Corporati COMMON 22160K105 26,026,000 700,000 N X 700,000 Cox Communications, Inc. - COMMON 224044107 21,359,000 620,000 N X 620,000 Cisco Systems, Inc. COMMON 17275R102 21,807,000 900,000 N X 900,000 CEMEX, S.A. de C.V. COMMON 151290889 12,143,700 463,500 N X 463,500 Genentech, Inc. COMMON 368710406 29,474,550 315,000 N X 315,000 Devon Energy Corporation COMMON 25179M103 37,219,000 650,000 N X 650,000 EMC Corporation COMMON 268648102 3,876,000 300,000 N X 300,000 EMCORE Corporation COMMON 290846104 927,870 197,000 N X 197,000 Ethan Allen Interiors Inc. COMMON 297602104 11,517,000 275,000 N X 275,000 FleetBoston Financial COMMON 339030108 6,547,500 150,000 N X 150,000 Golden West Financial COMMON 381317106 34,568,650 335,000 N X 335,000 Genaera Corporation COMMON 36867G100 882,900 270,000 N X 270,000 Genta Incorporated COMMON 37245M207 3,911,250 375,000 N X 375,000 Halliburton Company COMMON 406216101 16,900,000 650,000 N X 650,000 The Home Depot, Inc. COMMON 437076102 68,140,800 1,920,000 N X 1,920,000 Health Net, Inc. COMMON 42222G108 22,726,500 695,000 N X 695,000 John Hancock Financial Ser COMMON 41014S106 12,375,000 330,000 N X 330,000 Juniper Networks, Inc. COMMON 48203R104 8,406,000 450,000 N X 450,000 Medtronic, Inc. COMMON 585055106 21,874,500 450,000 N X 450,000 MedImmune, Inc. COMMON 584699102 11,547,900 455,000 N X 455,000 MedImmune Vaccines, Inc. 5 CONV C 053762AD2 10,250,000 10,000,000 N X 10,000,000 MetLife, Inc. COMMON 59156R108 14,646,450 435,000 N X 435,000 MFA Mortgage Investments, COMMON 55272X102 5,606,250 575,000 N X 575,000 Millennium Pharmaceuticals COMMON 599902103 2,238,000 120,000 N X 120,000 Molex Incorporated Class A COMMON 608554200 20,297,175 692,500 N X 692,500 M&T Bank Corporation COMMON 55261F104 30,473,000 310,000 N X 310,000 Annaly Mortgage Management COMMON 035710409 15,180,000 825,000 N X 825,000 Newell Rubbermaid Inc. COMMON 651229106 2,846,250 125,000 N X 125,000 OSI Pharmaceuticals, Inc. COMMON 671040103 967,500 30,000 N X 30,000 PepsiCo, Inc. COMMON 713448108 6,993,000 150,000 N X 150,000 Pfizer Inc COMMON 717081103 46,812,250 1,325,000 N X 1,325,000 PartnerRe Ltd. COMMON G6852T105 29,025,000 500,000 N X 500,000 Everest Re Group, Ltd. COMMON G3223R108 54,990,000 650,000 N X 650,000 Reinsurance Group of Ameri COMMON 759351109 16,426,250 425,000 N X 425,000 Republic Services, Inc. COMMON 760759100 30,115,250 1,175,000 N X 1,175,000 Royce Value Trust COMMON 780910105 1,638,988 94,794 N X 94,794 SunTrust Banks, Inc. COMMON 867914103 14,657,500 205,000 N X 205,000 The TJX Companies, Inc. COMMON 872540109 55,125,000 2,500,000 N X 2,500,000 Total S.A. ADR COMMON 89151E109 6,577,461 71,100 N X 71,100 Transatlantic Holdings, In COMMON 893521104 18,584,000 230,000 N X 230,000 VeriSign, Inc. COMMON 92343E102 5,705,000 350,000 N X 350,000 Wal-Mart Stores, Inc. COMMON 931142103 35,808,750 675,000 N X 675,000