UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2004 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 May 7, 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: 60 Form 13F Information Table Value Total: $1,034,033,328 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 1,193,061 94,090 N X 94,090 Agere Systems Inc. Class A COMMON 00845V100 3,210,000 1,000,000 N X 1,000,000 American International Gro COMMON 026874107 20,691,500 290,000 N X 290,000 Alkermes, Inc. COMMON 01642T108 5,436,600 340,000 N X 340,000 Applied Materials, Inc. COMMON 038222105 2,836,890 133,000 N X 133,000 Annuity and Life Re (Holdi COMMON G03910109 1,070,000 1,000,000 N X 1,000,000 Bank of America Corporatio COMMON 060505104 8,098,000 100,000 N X 100,000 Baxter International Inc. COMMON 071813109 27,801,000 900,000 N X 900,000 Bancroft Convertible Fund COMMON 059695106 404,805 20,877 N X 20,877 Biogen Idec Inc. COMMON 09062X103 13,900,000 250,000 N X 250,000 Bristol-Myers Squibb Compa COMMON 110122108 7,269,000 300,000 N X 300,000 Berkshire Hathaway Inc. COMMON 084670108 27,990,000 300 N X 300 Brooks Automation, Inc. COMMON 114340102 10,341,160 491,500 N X 491,500 Central Securities Corpora COMMON 155123102 2,424,708 113,040 N X 113,040 CIENA Corporation COMMON 171779101 2,733,500 550,000 N X 550,000 Costco Wholesale Corporati COMMON 22160K105 26,327,000 700,000 N X 700,000 Cox Communications, Inc. - COMMON 224044107 19,592,000 620,000 N X 620,000 Cisco Systems, Inc. COMMON 17275R102 21,213,000 900,000 N X 900,000 CEMEX, S.A. de C.V. COMMON 151290889 15,312,570 513,500 N X 513,500 Diageo plc COMMON 25243Q205 15,864,000 300,000 N X 300,000 Genentech, Inc. COMMON 368710406 30,687,800 290,000 N X 290,000 Devon Energy Corporation COMMON 25179M103 37,797,500 650,000 N X 650,000 EMC Corporation COMMON 268648102 4,083,000 300,000 N X 300,000 EMCORE Corporation COMMON 290846104 801,790 197,000 N X 197,000 El Paso Corporation 0% CONV C 28336LAC3 10,490,625 22,500,000 N X 22,500,000 Ethan Allen Interiors Inc. COMMON 297602104 11,346,500 275,000 N X 275,000 FleetBoston Financial COMMON 339030108 6,735,000 150,000 N X 150,000 Golden West Financial COMMON 381317106 36,383,750 325,000 N X 325,000 Genaera Corporation COMMON 36867G100 1,206,900 270,000 N X 270,000 Gilead Sciences, Inc. COMMON 375558103 2,772,500 50,000 N X 50,000 Genta Incorporated COMMON 37245M207 3,937,500 375,000 N X 375,000 Halliburton Company COMMON 406216101 18,993,750 625,000 N X 625,000 The Home Depot, Inc. COMMON 437076102 71,731,200 1,920,000 N X 1,920,000 Health Net, Inc. COMMON 42222G108 19,944,000 800,000 N X 800,000 John Hancock Financial Ser COMMON 41014S106 11,577,850 265,000 N X 265,000 Juniper Networks, Inc. COMMON 48203R104 11,709,000 450,000 N X 450,000 Medtronic, Inc. COMMON 585055106 21,487,500 450,000 N X 450,000 MedImmune, Inc. COMMON 584699102 10,501,400 455,000 N X 455,000 MetLife, Inc. COMMON 59156R108 15,520,800 435,000 N X 435,000 MFA Mortgage Investments, COMMON 55272X102 7,070,000 700,000 N X 700,000 Millennium Pharmaceuticals COMMON 599902103 2,028,000 120,000 N X 120,000 Molex Incorporated Class A COMMON 608554200 18,039,625 692,500 N X 692,500 Montpelier Re Holdings Ltd COMMON G62185106 3,724,000 100,000 N X 100,000 Microsoft Corporation COMMON 594918104 38,018,250 1,525,000 N X 1,525,000 M&T Bank Corporation COMMON 55261F104 28,752,000 320,000 N X 320,000 Annaly Mortgage Management COMMON 035710409 15,151,250 775,000 N X 775,000 NetIQ Corporation COMMON 64115P102 6,043,680 432,000 N X 432,000 PepsiCo, Inc. COMMON 713448108 8,077,500 150,000 N X 150,000 Pfizer Inc COMMON 717081103 46,441,250 1,325,000 N X 1,325,000 PartnerRe Ltd. COMMON G6852T105 28,225,000 500,000 N X 500,000 Everest Re Group, Ltd. COMMON G3223R108 55,536,000 650,000 N X 650,000 Reinsurance Group of Ameri COMMON 759351109 17,412,250 425,000 N X 425,000 Republic Services, Inc. COMMON 760759100 31,807,250 1,175,000 N X 1,175,000 Royce Value Trust COMMON 780910105 1,720,014 96,630 N X 96,630 SunTrust Banks, Inc. COMMON 867914103 14,290,550 205,000 N X 205,000 The TJX Companies, Inc. COMMON 872540109 61,400,000 2,500,000 N X 2,500,000 Total S.A. ADR COMMON 89151E109 22,724,000 247,000 N X 247,000 Transatlantic Holdings, In COMMON 893521104 20,058,300 230,000 N X 230,000 VeriSign, Inc. COMMON 92343E102 5,806,500 350,000 N X 350,000 Wal-Mart Stores, Inc. COMMON 931142103 40,290,750 675,000 N X 675,000