UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: June 30, 2004 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: Alleghany Corporation Address: 375 Park Avenue New York, NY 10152 Form 13F File Number: 28-1590 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: Peter R. Sismondo Title: Vice President, Controller, Treasurer and Assistant Secretary Phone: 212-752-1356 Signature, Place, and Date of Signing: /s/ Peter R. Sismondo New York, NY August 4, 2004 -------------------------------------------------------------------------------- [Signature] [City, State] [Date] Report Type (Check only one): [X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [ ] 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) [ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) Form 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: Form 13F Information Table Entry Total: 84 Form 13F Information Table Value Total: $ 587,366 (thousands) List of Other Included Managers: No. Form 13F File Number Name SECURITIES AND EXCHANGE COMMISSIONS FORM 13F INFORMATION PREPARED FOR ALLEGHANY CORPORATION AS OF 6/30/04 COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 -------- -------- -------- -------- -------- -------- -------- -------- INVESTMENT VOTING TITLE MARKET DISCRETION AUTHORITY OF VALUE SHRS OR SH/ PUT/ SOLE SHRD OTHER SOLE SHRD NONE NAME OF ISSUER CLASS CUSIP (X 1000) PRIN AMT PRN CALL (A) (B) (C) MANAGER (A) (B) (C) -------------- ----- ----- -------- -------- --- ---- --- --- --- --- --- --- AMB PROPERTY CORP COM 00163T109 2,566 74,100 SH X 1 X ALEXANDER & BALDWIN INC COM 014482103 669 20,000 SH X 1 X AMERICAN EXPRESS CO COM 025816109 1,028 20,000 SH X 1 X AMERICAN INTL GROUP INC COM 026874107 1,426 20,000 SH X 1 X APPLERA CORP COM AP BIO GRP 038020903 1,088 50,000 SH X 1 X APPLIED MATLS INC COM 038222105 491 25,000 SH X 1 X ARCH COAL INC COM 039380100 21,954 600,000 SH X 1 X ARCHSTONE SMITH TR COM 039583109 2,349 80,100 SH X 1 X AUTODESK INC COM 052769106 1,070 25,000 SH X 1 X AVALONBAY CMNTYS INC COM 053484101 2,734 48,364 SH X 1 X AVERY DENNISON CORP COM 14482103 640 10,000 SH X 1 X BANK OF AMERICA CORPORATION COM 60505104 8,462 100,000 SH X 1 X BERKSHIRE HATHAWAY INC DEL CL B 084670207 4,524 1,531 SH X 1 X BIOGEN IDEC INC COM 09062X903 1,581 25,000 SH X 1 X BOEING CO COM 097023105 766 15,000 SH X 1 X BURLINGTON RES INC COM 122014103 724 20,000 SH X 1 X BURLINGTON NORTHN SANTA FE C COM 12189T104 280,560 8,000,000 SH X 1 X CIGNA CORP COM 125509109 137,620 2,000,000 SH X 1 X CATERPILLAR INC DEL COM 149123101 1,192 15,000 SH X 1 X CHUBB CORP COM 171232101 1,023 15,000 SH X 1 X CINERGY CORP COM 172474108 3,800 100,000 SH X 1 X COCA COLA CO COM 191216100 1,262 25,000 SH X 1 X CONOCOPHILLIPS COM 20825C104 1,144 15,000 SH X 1 X CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 2,873 115,600 SH X 1 X COSTCO WHSL CORP NEW COM 22160K105 1,235 30,000 SH X 1 X COX COMMUNICATIONIS INC NEW CL A 224044107 973 35,000 SH X 1 X DEERE & CO COM 244199105 1,052 15,000 SH X 1 X DISNEY WALT CO COM DISNEY 254687106 1,147 45,000 SH X 1 X DOMINION RES INC VA NEW COM 25746U109 4,542 72,000 SH X 1 X DOW CHEM CO COM 260543103 1,018 25,000 SH X 1 X EQUITY RESIDENTIAL SH BEN INT 29476L107 2,592 87,200 SH X 1 X EXXON MOBIL CORP COM 30231G102 1,332 30,000 SH X 1 X FEDERAL REALTY INVT TR SH BEN INT NEW 313747206 2,778 66,800 SH X 1 X FEDEX CORP COM 31428X106 1,225 15,000 SH X 1 X FRESH DEL MONTE PRODUCE INC ORD G36738105 3,791 150,000 SH X 1 X GRAINGER W W INC COM 384802104 1,150 20,000 SH X 1 X GREAT PLAINS ENERGY INC COM 391164100 2,970 100,000 SH X 1 X GUIDANT CORP COM 401698105 559 10,000 SH X 1 X HEARST-ARGYLE TELEVISION INC COM 422317107 516 20,000 SH X 1 X INTEL CORP COM 458140100 828 30,000 SH X 1 X INTERACTIVECORP COM 45840Q101 603 20,000 SH X 1 X INTERNATIONAL BUSINESS MACHS COM 459200101 1,058 12,000 SH X 1 X JEFFERSON PILOT CORP COM 475070108 1,016 20,000 SH X 1 X JOHNSON & JOHNSON COM 478160104 5,570 100,000 SH X 1 X KERR MCGEE CORP COM 492386107 8,066 150,000 SH X 1 X LAUDER ESTEE COS INC CL A 518439104 732 15,000 SH X 1 X LIBERTY MEDIA CORP NEW COM SER A 530718105 989 110,000 SH X 1 X LIBERTY MEDIA INTL INC COM SER A 530719103 204 5,500 SH X 1 X LILLY ELI & CO COM 532457108 1,049 15,000 SH X 1 X LINDSAY MFG CO COM 535555106 360 15,000 SH X 1 X MBIA INC COM 55262C100 286 5,000 SH X 1 X MACERICH CO COM 554382101 2,629 54,910 SH X 1 X MACK CALI RLTY CORP COM 554489104 2,359 57,000 SH X 1 X MAGNA INTL INC CL A 559222401 4,791 56,250 SH X 1 X MANPOWER INC COM 56418H100 762 15,000 SH X 1 X MARSH & MCLENNAN COS INC COM 571748102 1,361 30,000 SH X 1 X MEDTRONIC INC COM 58055106 1,462 30,000 SH X 1 X MERCK & CO INC COM 589331107 713 15,000 SH X 1 X MICROSOFT CORP COM 594918104 1,999 70,000 SH X 1 X MILLIPORE CORP COM 601073109 1,691 30,000 SH X 1 X NEWELL RUBBERMAID INC COM 651229106 470 20,000 SH X 1 X NOBLE ENERGY INC COM 655044105 765 15,000 SH X 1 X NEWS CORP LTD SP ADR PFD 652487802 1,151 35,000 SH X 1 X NORDSTROM INC COM 655664100 852 20,000 SH X 1 X NOVARTIS AG SPONSORED ADR 66987V109 1,113 25,000 SH X 1 X OLD REP INTL CORP COM 680223104 3,558 150,000 SH X 1 X 1 SECURITIES AND EXCHANGE COMMISSIONS FORM 13F INFORMATION PREPARED FOR ALLEGHANY CORPORATION AS OF 6/30/04 COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 -------- -------- -------- -------- -------- -------- -------- -------- INVESTMENT VOTING TITLE MARKET DISCRETION AUTHORITY OF VALUE SHRS OR SH/ PUT/ SOLE SHRD OTHER SOLE SHRD NONE NAME OF ISSUER CLASS CUSIP (X 1000) PRIN AMT PRN CALL (A) (B) (C) MANAGER (A) (B) (C) -------------- ----- ----- -------- -------- --- ---- --- --- --- ------- --- --- --- PEPCO HOLDINGS INC COM 713291902 1,828 100,000 SH X 1 X PINNACLE WEST CAP CORP COM 723484101 8,078 100,000 SH X 1 X POST PPTYS INC COM 737464107 2,624 90,000 SH X 1 X PUBLIC STORAGE INC COM 74460D109 2,544 55,300 SH X 1 X ROHM & HAAS CO COM 775371107 1,040 25,000 SH X 1 X RYDER SYS INC COM 783549108 801 20,000 SH X 1 X SBC COMMUNICATIONS INC COM 78387G103 1,213 50,000 SH X 1 X SL GREEN RLTY CORP COM 78440X101 2,728 58,300 SH X 1 X SAFECO CORP COM 786429100 4,400 100,000 SH X 1 X SCHLUMBERGER LTD COM 806857108 1,270 20,000 SH X 1 X SIGMA ALDRICH CORP COM 826552101 596 10,000 SH X 1 X SONY CORP ADR NEW 835699307 951 25,000 SH X 1 X TAUBMAN CTRS INC COM 876664103 2,596 113,400 SH X 1 X TEXAS INSTRS INC COM 882508104 484 20,000 SH X 1 X 3M CO COM 88579Y101 1,350 15,000 SH X 1 X WACHOVIA CORP 2ND NEW COM 929903102 890 20,000 SH X 1 X WAL MART STORES INC COM 9331142103 1,583 30,000 SH X 1 X WEYERHAUSER CO COM 962166104 1,262 20,000 SH X 1 X GRAND TOTAL 587,366 14,063,355 2