UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: December 31, 2001 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 February 14, 2001 ---------------------------- ----------------------- ----------------- [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: 194 Form 13F Information Table Value Total: $519,798 (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 37,664,098 4,655,636 X X AOL TIME WARNER Common Stock 00184A105 6,294,200 196,081 X X AT&T CORP. Common Stock 001957109 295,708 16,301 X X AT&T CORP. Common Stock 001957208 840,000 60,000 X X AT&T WIRELESS SERVICES Common Stock 00209A106 881,686 61,356 X X ABBOTT LABORATORIES Common Stock 002824100 1,672,500 30,000 X X ALCOA, INC. Common Stock 013817101 2,133,000 60,000 X X ALLIED WASTE INDUSTRIES INC Common Stock 019589308 1,617,153 115,018 X X ALLTEL CORP. Common Stock 020039103 2,777,850 45,000 X X AMERICAN HOME PRODUCTS Common Stock 026609107 736,320 12,000 X X AMERICAN INTERNATIONAL GROUP Common Stock 026874107 8,564,241 107,862 X X AMETEK INC Common Stock 031100100 542,130 17,000 X X AMGEN, INC. Common Stock 031162100 3,837,920 68,000 X X ANADARKO PETROLEUM CORP Common Stock 032511107 2,728,800 48,000 X X ANDREW CORPORATION Common Stock 034425108 1,860,650 85,000 X X ANHEUSER-BUSCH COMPANIES INC Common Stock 035229103 3,390,750 75,000 X X AON FUNDS Common Stock 036912889 150,168,599 14,751,336 X X APACHE CORP. Common Stock 037411105 3,182,344 63,800 X X BP AMOCO PLC Common Stock 055622104 2,930,130 63,000 X X BANKAMERICA CORP Common Stock 060505104 2,455,050 39,000 X X BIOGEN Common Stock 090597105 2,179,300 38,000 X X BRISTOL MYERS SQUIBB Common Stock 110122108 2,958,000 58,000 X X BURLINGTON NORTHERN/SANTA FE Common Stock 12189T104 1,369,440 48,000 X X CSX CORPORATION Common Stock 126408103 2,453,500 70,000 X X CVS CORPORATION Common Stock 126650100 2,634,400 89,000 X X CARDINAL HEALTH INC. Common Stock 14149Y108 3,717,950 57,500 X X CARNIVAL CORP Common Stock 143658102 1,684,800 60,000 X X CHEVRONTEXACO CORP Common Stock 166764100 2,069,991 23,100 X X CINAR CORP CL B SUB VTG Common Stock 171905300 90,000 40,000 X X CISCO SYSTEMS Common Stock 17275R102 1,159,040 64,000 X X CITIGROUP INC. Common Stock 172967101 5,104,184 101,113 X X CITRIX SYSTEMS INC Common Stock 177376100 1,133,000 50,000 X X CLEAR CHANNEL COMM Common Stock 184502102 4,296,448 84,393 X X COCA COLA CO Common Stock 191216100 3,064,750 65,000 X X COLGATE PALMOLIVE CO Common Stock 194162103 2,385,075 41,300 X X COMPAQ COMPUTER Common Stock 204493100 634,400 65,000 X X COMVERSE TECHNOLOGY,INC Common Stock 205862402 335,550 15,000 X X CONCORD EFS INC Common Stock 206197105 983,400 30,000 X X CONSECO CONVERTIBLE SEC. FUND Common Stock 20846T672 992,388 103,159 X X CORNING INC. Common Stock 219350105 490,600 55,000 X X DRS TECHNOLOGIES, INC. Common Stock 23330X100 35,650 1,000 X X DEAN FOODS Common Stock 242370104 892,363 13,085 X X DEERE & CO Common Stock 244199105 2,095,680 48,000 X X DELL COMPUTER CORP Common Stock 247025109 3,036,006 111,700 X X DEVON ENERGY Common Stock 25179M103 1,932,500 50,000 X X DIGITAL RIVER INC Common Stock 25388B104 477,600 30,000 X X THE WALT DISNEY CO. Common Stock 254687106 2,072,000 100,000 X X DIVINE INTERVENTURES Common Stock 255402109 1,644,445 2,222,223 X X DOW CHEMICAL Common Stock 260543103 1,790,340 53,000 X X DUPONT (E.I.) DENEMOURS & CO Common Stock 263534109 2,125,500 50,000 X X DUKE REALTY CORP. Common Stock 264411505 878,315 36,100 X X EMC CORP./MASS Common Stock 268648102 1,076,705 80,112 X X EASTMAN CHEMICAL Common Stock 277432100 2,536,300 65,000 X X ECOMETRY CORP Common Stock 27900H106 78,300 30,000 X X EMERSON ELECTRIC CO. Common Stock 291011104 3,254,700 57,000 X X ENGINEERED SUPPORT SYSTEMS INC Common Stock 292866100 410,520 12,000 X X EQUITY OFFICE PROPERTIES TRUST Common Stock 294741103 582,753 19,373 X X EXXON MOBIL CORP Common Stock 30231G102 6,712,676 170,806 X X FEDERAL HOME LOAN MTGE CORP Common Stock 313400301 1,033,320 15,800 X X FEDERAL NATIONAL MORTGAGE ASSN Common Stock 313586109 5,779,650 72,700 X X FIBERMARK INC Common Stock 315646109 274,560 48,000 X X FIRST DATA CORPORATION Common Stock 319963104 1,622,111 20,677 X X FIRST FEDERAL SAVINGS BANK Common Stock 33761K105 1,629,269 57,167 X X FORD MOTOR COMPANY Common Stock 345370860 3,572,559 227,262 X X FOUNDRY NETWORKS IN Common Stock 35063R100 114,100 14,000 X X FOX ENTERTAINMENT GRP INC-A Common Stock 35138T107 583,660 22,000 X X GENERAL ELECTRIC Common Stock 369604103 6,738,891 168,136 X X GENTEX CORP Common Stock 371901109 668,250 25,000 X X GEORGIA-PACIFIC CORP Common Stock 373298108 2,070,750 75,000 X X W.W. GRAINGER INC. Common Stock 384802104 2,280,000 47,500 X X HCA INC Common Stock 404119109 1,541,600 40,000 X X HRPT PROPERTIES, INC Common Stock 40426W101 1,751,918 202,300 X X JOHN HANCOCK FINANCIAL SVCS Common Stock 41014S106 158,964 3,849 X X HARTMARX Common Stock 417119104 166,815 101,100 X X HELMERICH AND PAYNE INC. Common Stock 423452101 340,476 10,200 X X HEWLETT PACKARD CO. Common Stock 428236103 1,499,420 73,000 X X HOME DEPOT INC Common Stock 437076102 2,808,662 55,061 X X HONEYWELL INTERNATIONAL INC. Common Stock 438516106 1,521,900 45,000 X X HOTJOBS.COM LTD Common Stock 441474103 51,950 5,000 X X ILLINOIS TOOL WORKS INC. Common Stock 452308109 2,708,800 40,000 X X IMAGISTICS INTL INC Common Stock 45247T104 17,784 1,440 X X INTEL CORPORATION Common Stock 458140100 2,704,700 86,000 X X INT'L BUSINESS MACHINES Common Stock 459200101 6,048,000 50,000 X X INTERNATIONAL PAPER COMPANY Common Stock 460146103 847,350 21,000 X X IVEX PACKAGING Common Stock 465855104 1,041,200 54,800 X X JP MORGAN CHASE & CO Common Stock 46625H100 508,900 14,000 X X JOHNSON & JOHNSON Common Stock 478160104 7,566,691 128,032 X X KELLOGG CO. Common Stock 487836108 963,200 32,000 X X KROGER Common Stock 501044101 1,969,460 94,368 X X L-3 COMMUNICATIONS HLDGS INC Common Stock 502424104 2,628,000 29,200 X X ELI LILLY & CO. Common Stock 532457108 2,748,900 35,000 X X LITTELFUSE, INC. Common Stock 537008104 1,049,600 40,000 X X MGIC INVESTMENT CORP Common Stock 552848103 1,543,000 25,000 X X MSC INDUSTRIAL DIRECT Common Stock 553530106 197,500 10,000 X X MATRIXONE INC Common Stock 57685P304 1,356,208 104,404 X X MAY DEPT STORES Common Stock 577778103 2,329,740 63,000 X X MCDONALDS CORP Common Stock 580135101 1,402,910 53,000 X X MEDIMMUNE INC Common Stock 584699102 1,854,000 40,000 X X MERCK & CO. Common Stock 589331107 2,940,000 50,000 X X METALS USA INC Common Stock 591324108 1,200 20,000 X X MICROSOFT CORP. Common Stock 594918104 5,697,500 86,000 X X MOBILE MINI INC Common Stock 60740F105 2,190,720 56,000 X X MORGAN STANLEY DEAN WITTER & C Common Stock 617446448 2,125,754 38,001 X X NANOPHASE TECHNOLOGIES Common Stock 630079101 340,442 57,800 X X NASDAQ 100 SHARES Common Stock 631100104 2,361,565 60,693 X X NEWPARK RESOURCES INC. Common Stock 651718504 985,004 124,684 X X NEWS CORP LTD-SPONS ADR Common Stock 652487703 922,490 29,000 X X NOKIA ADR A Common Stock 654902204 1,815,220 74,000 X X NORFOLK SOUTHERN CORP Common Stock 655844108 1,919,151 104,700 X X NORTHSTAR CAPITAL INVMNT GRP Common Stock 66704F999 1,072,380 53,619 X X NUCOR CORP Common Stock 670346105 1,165,120 22,000 X X OMEGA WORLDWIDE INC Common Stock 68210B108 32,601 20,000 X X PAXSON COMMUNICATION Common Stock 704231109 209,000 20,000 X X PEPSICO INC Common Stock 713448108 1,217,250 25,000 X X PETROLEUM GEO-SVCS -SPON ADR Common Stock 716597109 756,200 95,000 X X PFIZER, INC. Common Stock 717081103 6,555,325 164,500 X X PITNEY BOWES INC Common Stock 724479100 1,241,130 33,000 X X BANCO POPULAR Common Stock 733174106 76,791 2,641 X X POWERWAVE TECHNOLOGIES INC Common Stock 739363109 1,572,480 91,000 X X PRICE LEGACY CORPORATION Common Stock 74144P106 141,154 44,669 X X PUBLIC STORAGE INC. Common Stock 74460D109 23 1 X X QUANTA SERVICES INC Common Stock 74762E102 1,033,810 67,000 X X RADIANT SYSTEMS INC Common Stock 75025N102 437,000 38,000 X X RADIOSHACK CORP Common Stock 750438103 1,053,500 35,000 X X RAILWORKS CORP Common Stock 750789109 9,300 60,000 X X RIO ALTO EXPLORATION LTD Common Stock 766892103 935,350 80,000 X X ROYAL DUTCH PETROLEUM CO. Common Stock 780257804 1,519,620 31,000 X X SPX CORPORATION Common Stock 784635104 2,738,000 20,000 X X SAKS INCORPORATED Common Stock 79377W108 579,080 62,000 X X SANDISK CORP Common Stock 80004C101 331,200 23,000 X X SCHERING PLOUGH CORP Common Stock 806605101 4,540,994 126,808 X X SCHOLASTIC CORP Common Stock 807066105 2,516,500 50,000 X X SHELL TRANSPORT - TRADING ADR Common Stock 822703609 829,000 20,000 X X SHIRE PHARMACEUTICALS Common Stock 82481R106 805,200 22,000 X X SIGMA ALDRICH Common Stock 826552101 236,460 6,000 X X SIX FLAGS INC. Common Stock 83001P109 1,076,600 70,000 X X SPRINT CORPORATION Common Stock 852061100 903,600 45,000 X X STATE STREET CORP Common Stock 857477103 1,567,500 30,000 X X SUN MICROSYSTEMS, INC. Common Stock 866810104 1,586,700 129,000 X X SUNGARD DATA SYSTEMS Common Stock 867363103 2,314,400 80,000 X X SYMANTEC CORP Common Stock 871503108 994,950 15,000 X X TARGET CORP Common Stock 87612E106 2,052,500 50,000 X X TECHNITROL INC Common Stock 878555101 1,104,800 40,000 X X TELLABS INC. Common Stock 879664100 1,563,320 104,500 X X TENET HEALTHCARE CORP Common Stock 88033G100 2,642,400 45,000 X X TEXAS INSTRUMENTS Common Stock 882508104 868,000 31,000 X X TEXTRON, INC Common Stock 883203101 2,073,000 50,000 X X TRIBUNE CO Common Stock 896047107 3,518,420 94,000 X X TROPICAL SPORTSWEAR INTL Common Stock 89708P102 309,375 16,500 X X U.S. AIRWAYS GROUP, INC. Common Stock 911905107 124,226 19,594 X X VF CORP. Common Stock 918204108 1,755,450 45,000 X X VERIZON CORPORATION Common Stock 92343V104 1,661,100 35,000 X X VIACOM INC Common Stock 925524100 1,327,500 30,000 X X VIACOM INC Common Stock 925524308 522,736 11,840 X X VOICESTREAM WIRELESS CORP Common Stock 928615103 982 11 X X WACHOVIA CORP. 2ND NEW COM Common Stock 929903102 2,352,000 75,000 X X WAL-MART STORES, INC. Common Stock 931142103 1,035,900 18,000 X X WALGREENS CO Common Stock 931422109 4,039,200 120,000 X X WATSCO Common Stock 942622101 169,200 12,000 X X WATSCO Common Stock 942622200 1,704,000 120,000 X X WATSON PHARMACEUTICALS, INC. Common Stock 942683103 627,800 20,000 X X WILLAMETTE INDUSTRIES Common Stock 969133107 2,501,760 48,000 X X WINTRUST FINANCIAL CORP Common Stock 97650W108 1,427,619 46,700 X X WIRELESS TELECOM GROUP, INC. Common Stock 976524108 310,168 109,600 X X WORLDCOM INC Common Stock 98157D106 1,430,528 101,600 X X WORLDCOM INC Common Stock 98157D304 51,613 4,064 X X WRIGLEY, (WM) JR. CO. Common Stock 982526105 1,181,510 23,000 X X YAHOO ! INC. Common Stock 984332106 1,312,760 74,000 X X YOUNG BROADCASTING CORP -A Common Stock 987434107 1,175,725 65,500 X X ZIMMER HOLDINGS INC Common Stock 98956P102 152,700 5,000 X X MAX RE CAPITAL LTD. Common Stock G6052F103 7,308,000 466,667 X X TRENWICK GROUP Common Stock G9032C109 6,789,817 667,632 X X AUDIOCODES LTD Common Stock M15342104 282,500 50,000 X X SUN INTERNATIONAL HOTELS LTD-A Common Stock P8797T133 399,972 15,778 X X CKE RESTAURANTS INC Taxable Bonds-Convertible 12561EAB1 851,363 1,095,000 X X CLEAR CHANNEL COMM Taxable Bonds-Convertible 184502AE2 414,906 425,000 X X ESC MEDICAL SYSTEMS Taxable Bonds-Convertible 269025AA0 513,663 545,000 X X ESC MEDICAL SYSTEMS Taxable Bonds-Convertible 269025AB8 301,600 320,000 X X GETTY IMAGES, INC Taxable Bonds-Convertible 374276AA1 1,502,400 2,000,000 X X GETTY IMAGES, INC Taxable Bonds-Convertible 374276AD5 4,935,000 6,000,000 X X GOLD EAGLE CAPITAL 2001 Taxable Bonds-Convertible 38058MAA0 4,024,720 4,000,000 X X HEALTHSOUTH CORP Taxable Bonds-Convertible 421924AD3 1,385,175 1,460,000 X X HILTON HOTELS CORP. Taxable Bonds-Convertible 432848AL3 597,375 675,000 X X INTERIM SERVICES, INC. Taxable Bonds-Convertible 45868PAA8 918,125 1,130,000 X X KELLSTROM INDUSTRIES Taxable Bonds-Convertible 488035AC0 175,000 3,500,000 X X KELLSTROM INDUSTRIES Taxable Bonds-Convertible 488035AE6 100,000 2,000,000 X X KERR MCGEE CORP Taxable Bonds-Convertible 492386AP2 1,280,813 1,150,000 X X MASCOTECH INC. Taxable Bonds-Convertible 574670AB1 722,275 865,000 X X MUTUAL RISK Taxable Bonds-Convertible 628351AA6 390,000 1,000,000 X X QUANTA SERVICES INC Taxable Bonds-Convertible 74762EAA0 1,335,000 2,000,000 X X THERMO INSTRUMENT SYSTEMS Taxable Bonds-Convertible 883559AE6 642,875 695,000 X X THERMO FIBERTEK INC Taxable Bonds-Convertible 88355WAA3 472,500 500,000 X X THERMO FIBERTEK INC Taxable Bonds-Convertible VV3081948 475,000 500,000 X X BOLDER TECHNOLOGIES CORP. Preferred Stock-Convertible 097519912 2,000,000 40,000 X X