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, 2002 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: Aon Advisors, Inc. Address: 200 East Randolph Street Chicago, IL 60601 Name of additional disclosed party: Name: Aon Corporation Address: 200 East Randolph Street Chicago, IL 60601 Form 13F File Number: 28-2005 28-2401 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: Michael A. Conway Title: President Phone: (312) 381-3330 Signature, Place, and Date of Signing: /s/ Michael A. Conway Chicago, IL August 8, 2002 ---------------------------- ----------------------- -------------- [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: 0 Form 13F Information Table Entry Total: 150 Form 13F Information Table Value Total: $289,206 (thousands) List of Other Included Managers Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. [If there are no entries in this list, state "NONE" and omit the column headings and list entries] No. Form 13F File Number Name NONE FORM 13F INFORMATION TABLE NAME OF ISSUER TITLE OF CLASS CUSIP MARKET VALUE PAR SHARES ITEM:6 ITEM:7 ITEM:8 ACM GOVT OPPOR FUND INC. Common Stock 000918102 41,342,051 4,655,636 X X AOL TIME WARNER Common Stock 00184A105 2,884,352 196,081 X X AT&T WIRELESS SERVICES Common Stock 00209A106 358,933 61,356 X X ABBOTT LABORATORIES Common Stock 002824100 1,129,500 30,000 X X ALCOA, INC. Common Stock 013817101 1,989,000 60,000 X X ALLIED WASTE INDUSTRIES INC Common Stock 019589308 1,104,173 115,018 X X ALLTEL CORP. Common Stock 020039103 2,115,000 45,000 X X AMERICAN INTERNATIONAL GROUP Common Stock 026874107 8,212,231 120,361 X X AMGEN, INC. Common Stock 031162100 2,127,504 50,800 X X ANADARKO PETROLEUM CORP Common Stock 032511107 1,873,400 38,000 X X ANDREW CORPORATION Common Stock 034425108 1,268,200 85,000 X X ANHEUSER-BUSCH COMPANIES INC Common Stock 035229103 3,750,000 75,000 X X APACHE CORP. Common Stock 037411105 3,178,644 55,300 X X AVERY DENNISON CORP Common Stock 053611109 665,150 10,600 X X BP AMOCO PLC Common Stock 055622104 3,180,870 63,000 X X BIOGEN Common Stock 090597105 1,160,040 28,000 X X BRISTOL MYERS SQUIBB Common Stock 110122108 1,490,600 58,000 X X BURLINGTON NORTHERN/SANTA FE Common Stock 12189T104 1,410,000 47,000 X X CSX CORPORATION Common Stock 126408103 2,453,500 70,000 X X CVS CORPORATION Common Stock 126650100 1,224,000 40,000 X X CARDINAL HEALTH INC. Common Stock 14149Y108 3,531,075 57,500 X X CARNIVAL CORP Common Stock 143658102 1,661,400 60,000 X X CHEVRON TEXACO CORP. Common Stock 166764100 3,451,500 39,000 X X CISCO SYSTEMS Common Stock 17275R102 892,800 64,000 X X CITIGROUP, INC. Common Stock 172967101 4,150,629 107,113 X X CITRIX SYSTEMS INC Common Stock 177376100 302,000 50,000 X X CLEAR CHANNEL COMM Common Stock 184502102 2,702,264 84,393 X X COCA COLA CO Common Stock 191216100 3,052,000 54,500 X X COLGATE PALMOLIVE CO Common Stock 194162103 2,402,400 48,000 X X COMVERSE TECHNOLOGY,INC Common Stock 205862402 324,100 35,000 X X CONCORD EFS INC Common Stock 206197105 904,200 30,000 X X CORNING INC. Common Stock 219350105 195,250 55,000 X X DEAN FOODS Common Stock 242370104 976,066 26,168 X X DEERE & CO Common Stock 244199105 2,299,200 48,000 X X DELL COMPUTER CORP Common Stock 247025109 2,919,838 111,700 X X DELUXE CORP Common Stock 248019101 921,693 23,700 X X DEVON ENERGY Common Stock 25179M103 2,464,000 50,000 X X DIGITAL RIVER INC Common Stock 25388B104 275,700 30,000 X X THE WALT DISNEY CO. Common Stock 254687106 1,890,000 100,000 X X DIVINE INTERVENTURES Common Stock 255402406 86,666 22,222 X X DOW CHEMICAL Common Stock 260543103 1,822,140 53,000 X X DUKE REALTY CORP. Common Stock 264411505 434,253 15,000 X X EMC CORP./MASS Common Stock 268648102 415,250 55,000 X X EASTMAN CHEMICAL Common Stock 277432100 3,048,500 65,000 X X EMERSON ELECTRIC CO. Common Stock 291011104 2,568,480 48,000 X X ENGINEERED SUPPORT SYSTEMS INC Common Stock 292866100 543,920 10,400 X X EQUITY OFFICE PROPERTIES TRUST Common Stock 294741103 1,224,271 40,673 X X EXXON MOBIL CORP Common Stock 30231G102 6,621,102 161,806 X X FEDERAL HOME LOAN MTGE CORP Common Stock 313400301 966,960 15,800 X X FEDERAL NATIONAL MORTGAGE ASSN Common Stock 313586109 5,361,625 72,700 X X FIBERMARK INC Common Stock 315646109 277,950 32,700 X X FIRST DATA CORPORATION Common Stock 319963104 769,184 20,677 X X FORD MOTOR COMPANY Common Stock 345370860 3,520,992 220,062 X X FOUNDRY NETWORKS IN Common Stock 35063R100 98,420 14,000 X X FOX ENTERTAINMENT GRP INC-A Common Stock 35138T107 478,500 22,000 X X GENERAL ELECTRIC Common Stock 369604103 5,465,351 188,136 X X GENTEX CORP Common Stock 371901109 549,400 20,000 X X GENZYME CORP. Common Stock 372917104 546,416 28,400 X X GEORGIA-PACIFIC CORP Common Stock 373298108 1,646,860 67,000 X X W.W. GRAINGER INC. Common Stock 384802104 2,004,000 40,000 X X HCA INC Common Stock 404119109 1,900,000 40,000 X X HRPT PROPERTIES, INC Common Stock 40426W101 1,790,355 202,300 X X HARTMARX Common Stock 417119104 252,750 101,100 X X HELMERICH AND PAYNE INC. Common Stock 423452101 364,344 10,200 X X HEWLETT PACKARD CO. Common Stock 428236103 1,405,378 91,975 X X HOME DEPOT INC Common Stock 437076102 3,197,751 87,061 X X HONEYWELL INTERNATIONAL INC. Common Stock 438516106 1,708,655 48,500 X X ILLINOIS TOOL WORKS INC. Common Stock 452308109 2,732,000 40,000 X X INTEL CORPORATION Common Stock 458140100 1,571,220 86,000 X X INT'L BUSINESS MACHINES Common Stock 459200101 3,888,000 54,000 X X INTERNATIONAL PAPER COMPANY Common Stock 460146103 915,180 21,000 X X JOHNSON & JOHNSON Common Stock 478160104 6,299,002 120,532 X X KROGER Common Stock 501044101 1,877,923 94,368 X X L-3 COMMUNICATIONS HLDGS INC Common Stock 502424104 1,576,800 29,200 X X LIBERTY MEDIA CORP-A Common Stock 530718105 600,000 60,000 X X ELI LILLY & CO. Common Stock 532457108 1,974,000 35,000 X X LITTELFUSE, INC. Common Stock 537008104 925,200 40,000 X X MGIC INVESTMENT CORP Common Stock 552848103 847,500 12,500 X X MAY DEPT STORES Common Stock 577778103 2,074,590 63,000 X X MCDONALDS CORP Common Stock 580135101 1,138,000 40,000 X X MEDIMMUNE INC Common Stock 584699102 1,056,000 40,000 X X MERCK & CO. Common Stock 589331107 2,532,000 50,000 X X MERRILL LYNCH & CO. Common Stock 590188108 1,215,000 30,000 X X MICROSOFT CORP. Common Stock 594918104 5,114,450 93,500 X X MOBILE MINI INC Common Stock 60740F105 976,410 57,100 X X MORGAN STANLEY DEAN WITTER & C Common Stock 617446448 1,637,040 38,000 X X NANOPHASE TECHNOLOGIES Common Stock 630079101 338,130 57,800 X X NASDAQ 100 SHARES Common Stock 631100104 1,584,087 60,693 X X NEWPARK RESOURCES INC. Common Stock 651718504 916,427 124,684 X X NEWS CORP LTD-SPONS ADR Common Stock 652487703 664,970 29,000 X X NOKIA ADR A Common Stock 654902204 1,288,720 89,000 X X NORFOLK SOUTHERN CORP Common Stock 655844108 2,447,886 104,700 X X NUCOR CORP Common Stock 670346105 1,430,880 22,000 X X NVIDIA CORP Common Stock 67066G104 566,940 33,000 X X OMEGA WORLDWIDE INC Common Stock 68210B108 42,196 19,998 X X PEPSICO INC Common Stock 713448108 1,205,000 25,000 X X PETROLEUM GEO-SVCS -SPON ADR Common Stock 716597109 342,000 95,000 X X PFIZER, INC. Common Stock 717081103 5,757,500 164,500 X X PITNEY BOWES INC Common Stock 724479100 1,032,720 26,000 X X POWERWAVE TECHNOLOGIES INC Common Stock 739363109 833,560 91,000 X X PRICE LEGACY CORPORATION Common Stock 74144P106 171,972 44,668 X X QUANTA SERVICES INC Common Stock 74762E102 661,290 67,000 X X RADIANT SYSTEMS INC Common Stock 75025N102 495,140 38,000 X X RADIOSHACK CORP Common Stock 750438103 1,052,100 35,000 X X ROYAL DUTCH PETROLEUM CO. Common Stock 780257804 331,620 6,000 X X SPX CORPORATION Common Stock 784635104 2,115,000 18,000 X X SAKS INCORPORATED Common Stock 79377W108 616,320 48,000 X X SANDISK CORP Common Stock 80004C101 285,200 23,000 X X SCHERING PLOUGH CORP Common Stock 806605101 3,119,477 126,808 X X SCHOLASTIC CORP Common Stock 807066105 1,895,000 50,000 X X SHELL TRANSPORT - TRADING ADR Common Stock 822703609 900,200 20,000 X X SHIRE PHARMACEUTICALS Common Stock 82481R106 567,820 22,000 X X SIX FLAGS INC. Common Stock 83001P109 1,011,500 70,000 X X STATE STREET CORP Common Stock 857477103 1,341,000 30,000 X X SUN MICROSYSTEMS, INC. Common Stock 866810104 646,290 129,000 X X SUNGARD DATA SYSTEMS Common Stock 867363103 2,118,400 80,000 X X SYMANTEC CORP Common Stock 871503108 1,314,000 40,000 X X TARGET CORP Common Stock 87612E106 1,981,200 52,000 X X TECHNITROL INC Common Stock 878555101 932,000 40,000 X X TELLABS INC. Common Stock 879664100 647,900 104,500 X X TENET HEALTHCARE CORP Common Stock 88033G100 3,219,750 45,000 X X TEXAS INSTRUMENTS Common Stock 882508104 734,700 31,000 X X TEXTRON, INC Common Stock 883203101 2,016,700 43,000 X X TRIBUNE CO Common Stock 896047107 4,089,000 94,000 X X TROPICAL SPORTSWEAR INTL Common Stock 89708P102 621,320 28,000 X X VF CORP. Common Stock 918204108 1,372,350 35,000 X X VERIZON CORPORATION Common Stock 92343V104 1,405,250 35,000 X X VIACOM INC Common Stock 925524100 1,333,800 30,000 X X VIACOM INC Common Stock 925524308 525,341 11,840 X X WACHOVIA CORP. 2ND NEW COM Common Stock 929903102 2,863,500 75,000 X X WAL-MART STORES, INC. Common Stock 931142103 990,180 18,000 X X WALGREENS CO Common Stock 931422109 4,539,025 117,500 X X WATSCO Common Stock 942622101 223,200 12,000 X X WATSCO Common Stock 942622200 565,750 31,000 X X WEYERHAEUSER CO Common Stock 962166104 1,787,800 28,000 X X WINTRUST FINANCIAL CORP Common Stock 97650W108 1,833,939 53,050 X X WIRELESS TELECOM GROUP, INC. Common Stock 976524108 235,640 109,600 X X WORLDCOM INC Common Stock 98157D106 110,888 133,600 X X WRIGLEY, (WM) JR. CO. Common Stock 982526105 1,273,050 23,000 X X WYETH Common Stock 983024100 614,400 12,000 X X YAHOO ! INC. Common Stock 984332106 1,114,712 75,523 X X YOUNG BROADCASTING CORP -A Common Stock 987434107 1,164,590 65,500 X X ZIMMER HOLDINGS INC Common Stock 98956P102 891,500 25,000 X X TRENWICK GROUP Common Stock G9032C109 4,351,493 580,199 X X AUDIOCODES LTD Common Stock M15342104 120,500 50,000 X X CKE RESTAURANTS INC Taxable Bonds-Convertible 12561EAB1 977,288 1,095,000 X X CLEAR CHANNEL COMM Taxable Bonds-Convertible 184502AE2 413,844 425,000 X X HILTON HOTELS CORP. Taxable Bonds-Convertible 432848AL3 633,656 675,000 X X INTERIM SERVICES, INC. Taxable Bonds-Convertible 45868PAA8 988,750 1,130,000 X X QUANTA SERVICES INC Taxable Bonds-Convertible 74762EAA0 1,287,500 2,000,000 X X