UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: June 30, 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 August 7, 2003 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: 57 Form 13F Information Table Value Total: $765,178,563 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 1,056,168 89,430 N X 89,430 American International Gro COMMON 026874107 20,692,500 375,000 N X 375,000 Alkermes, Inc. COMMON 01642T108 3,610,800 340,000 N X 340,000 Applied Materials, Inc. COMMON 038222105 3,168,000 200,000 N X 200,000 Annuity and Life Re (Holdi COMMON G03910109 1,240,000 1,000,000 N X 1,000,000 ASM International N.V. COMMON N07045102 3,717,500 250,000 N X 250,000 The Boeing Company COMMON 097023105 6,864,000 200,000 N X 200,000 Baxter International Inc. COMMON 071813109 16,900,000 650,000 N X 650,000 Baxter International Inc. CP U7% 071813406 5,612,790 114,500 N X 114,500 Bancroft Convertible Fund COMMON 059695106 351,310 17,725 N X 17,725 Bristol-Myers Squibb Compa COMMON 110122108 8,145,000 300,000 N X 300,000 Berkshire Hathaway Inc. COMMON 084670108 21,750,000 300 N X 300 Brooks Automation, Inc. COMMON 114340102 5,573,610 491,500 N X 491,500 Central Securities Corpora COMMON 155123102 2,005,066 105,976 N X 105,976 CIENA Corporation COMMON 171779101 2,843,500 550,000 N X 550,000 Costco Wholesale Corporati COMMON 22160K105 25,620,000 700,000 N X 700,000 Cox Communications, Inc. - COMMON 224044107 19,778,000 620,000 N X 620,000 Cisco Systems, Inc. COMMON 17275R102 15,111,000 900,000 N X 900,000 Genentech, Inc. COMMON 368710406 34,978,200 485,000 N X 485,000 EMC Corporation COMMON 268648102 3,141,000 300,000 N X 300,000 EMCORE Corporation COMMON 290846104 642,220 197,000 N X 197,000 Ethan Allen Interiors Inc. COMMON 297602104 9,669,000 275,000 N X 275,000 Golden West Financial COMMON 381317106 32,804,100 410,000 N X 410,000 Genaera Corporation COMMON 36867G100 456,300 270,000 N X 270,000 Genta Incorporated COMMON 37245M207 5,320,000 400,000 N X 400,000 Halliburton Company COMMON 406216101 14,950,000 650,000 N X 650,000 The Home Depot, Inc. COMMON 437076102 64,418,400 1,945,000 N X 1,945,000 Health Net, Inc. COMMON 42222G108 19,770,000 600,000 N X 600,000 IDEC Pharmaceuticals Corpo COMMON 449370105 9,339,000 275,000 N X 275,000 John Hancock Financial Ser COMMON 41014S106 13,060,250 425,000 N X 425,000 Juniper Networks, Inc. COMMON 48203R104 5,611,500 450,000 N X 450,000 Medtronic, Inc. COMMON 585055106 13,911,300 290,000 N X 290,000 MedImmune, Inc. COMMON 584699102 8,510,580 234,000 N X 234,000 MedImmune Vaccines, Inc. 5 CONV C 053762AD2 10,400,000 10,000,000 N X 10,000,000 MetLife, Inc. COMMON 59156R108 12,319,200 435,000 N X 435,000 Millennium Pharmaceuticals COMMON 599902103 1,887,600 120,000 N X 120,000 Molex Incorporated Class A COMMON 608554200 16,031,375 692,500 N X 692,500 M&T Bank Corporation COMMON 55261F104 26,108,200 310,000 N X 310,000 Max Re Capital Ltd. COMMON G6052F103 2,376,000 160,000 N X 160,000 Annaly Mortgage Management COMMON 035710409 9,955,000 500,000 N X 500,000 Newell Rubbermaid Inc. COMMON 651229106 3,500,000 125,000 N X 125,000 OSI Pharmaceuticals, Inc. COMMON 671040103 4,025,000 125,000 N X 125,000 PepsiCo, Inc. COMMON 713448108 6,675,000 150,000 N X 150,000 Pfizer Inc COMMON 717081103 35,003,750 1,025,000 N X 1,025,000 PartnerRe Ltd. COMMON G6852T105 25,043,900 490,000 N X 490,000 Everest Re Group, Ltd. COMMON G3223R108 52,785,000 690,000 N X 690,000 Reinsurance Group of Ameri COMMON 759351109 14,445,000 450,000 N X 450,000 Republic Services, Inc. COMMON 760759100 19,836,250 875,000 N X 875,000 Royce Value Trust COMMON 780910105 1,360,989 91,097 N X 91,097 SunTrust Banks, Inc. COMMON 867914103 13,351,500 225,000 N X 225,000 The TJX Companies, Inc. COMMON 872540109 45,687,000 2,425,000 N X 2,425,000 Transatlantic Holdings, In COMMON 893521104 15,904,500 230,000 N X 230,000 VeriSign, Inc. COMMON 92343E102 4,826,500 350,000 N X 350,000 Wind River Systems, Inc. COMMON 973149107 1,293,495 339,500 N X 339,500 Waste Management, Inc. COMMON 94106L109 9,852,810 409,000 N X 409,000 Wal-Mart Stores, Inc. COMMON 931142103 30,591,900 570,000 N X 570,000 Zarlink Semiconductor Inc. COMMON 989139100 1,297,500 250,000 N X 250,000