UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2006 Check here if Amendment [ ]; Amendment Number: This Amendment (Check only one): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager: Name: United Fire & Casualty Company Address: 118 Second Ave., S.E. Cedar Rapids, IA 52407 Form 13F File Number: 28-6427 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 the Reporting Manager: Name: Dianne M. Lyons Title: Controller Phone: 319-399-5723 Signature, Place and Date of Signing: /s/ Dianne M. Lyons Cedar Rapids, IA 05/03/2006 --------------------------- Dianne M. Lyons 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: 65 Form 13F Information Table Value Total: $160,321 (in thousands) List of Other Included Managers: NONE FORM 13F INFORMATION TABLE TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMNT OTHER -------VOTING AUTHORITY------- NAME OF ISSUER CLASS CUSIP (x $1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE =================================================================================================================================== AT&T Inc Common 00206R102 2,135 578,960 SH Sole 578,960 Abbott Laboratories Common 002824100 7,432 175,000 SH Sole 175,000 Agilysys Inc Common 00847J105 5,085 337,666 SH Sole 337,666 Alderwoods Group Inc Common 014383103 688 38,421 SH Sole 38,421 Alliant Energy Corporation Common 018802108 3,846 122,200 SH Sole 122,200 ALLTEL Corporation Common 020039103 811 12,518 SH Sole 12,518 American Strategic Inc Port II Common 030099105 277 25,420 SH Sole 25,420 Anheuser-Busch Companies Inc Common 035229103 171 4,000 SH Sole 4,000 BCE Inc Common 05534B109 390 16,200 SH Sole 16,200 BRE Properties Inc Common 05564E106 1,008 18,000 SH Sole 18,000 Bank of America Corporation Common 060505104 6,376 140,000 SH Sole 140,000 Bell South Corporation Common 079860102 554 16,000 SH Sole 16,000 Bemis Company Inc Common 081437105 992 31,400 SH Sole 31,400 Boeing Company Common 097023105 2,728 35,000 SH Sole 35,000 Burlington Northern Santa Fe Common 12189T10 1,346 16,158 SH Sole 16,158 Cincinnati Financial Corp Common 172062101 13,474 320,276 SH Sole 320,276 ConocoPhillips Common 20825C104 635 10,059 SH Sole 10,059 Cummins Inc Common 231021106 2,054 19,545 SH Sole 19,545 Dean Foods Company Common 242370104 1,874 48,261 SH Sole 48,261 Del Monte Foods Co Common 24522P103 238 20,097 SH Sole 20,097 Dow Chemical Company Common 260543103 3,654 90,000 SH Sole 90,000 Duke Energy Corporation Common 264399106 4,320 148,192 SH Sole 148,192 Duquesne Light Holdings Inc Common 266233105 1,073 65,000 SH Sole 65,000 Emerson Electric Co Common 291011104 527 6,300 SH Sole 6,300 Exxon Mobil Corporation Common 30231G102 2,434 40,000 SH Sole 40,000 Fidelity National Title Group Common 31620R105 72 3,177 SH Sole 3,177 Fidelity National Financial In Common 316326107 645 18,158 SH Sole 18,158 Arthur J Gallagher & Co Common 363576109 287 10,321 SH Sole 10,321 General Electric Company Common 369604103 7,304 210,000 SH Sole 210,000 Greater Bay Bancorp Common 391648102 555 20,000 SH Sole 20,000 H J Heinz Company Common 423074103 1,706 45,000 SH Sole 45,000 Honeywell International Inc Common 438516106 1,497 35,000 SH Sole 35,000 Hospira Inc Common 441060100 631 16,000 SH Sole 16,000 Intel Corporation Common 458140100 778 40,000 SH Sole 40,000 JPMorgan Chase & Co Common 46625H100 2,404 57,736 SH Sole 57,736 Johnson & Johnson Common 478160104 1,777 30,000 SH Sole 30,000 Keycorp Common 493267108 1,288 35,000 SH Sole 35,000 Mirant Corporation Common 60467R100 709 28,342 SH Sole 28,342 Newell Rubbermaid Inc Common 651229106 1,153 45,766 SH Sole 45,766 Nicor Inc Common 654086107 1,582 40,000 SH Sole 40,000 Ohio Casualty Corporation Common 677240103 317 10,000 SH Sole 10,000 Old Republic International Cor Common 680223104 4,903 224,690 SH Sole 224,690 Penwest Pharmaceuticals Co. Common 709754105 651 30,000 SH Sole 30,000 PepsiCo Inc Common 713448108 1,156 20,000 SH Sole 20,000 Pfizer Inc Common 717081103 748 30,000 SH Sole 30,000 Piper Jaffray Cos Common 724078100 458 8,329 SH Sole 8,329 Procter & Gamble Company Common 742718109 3,804 66,000 SH Sole 66,000 Progress Energy Inc Common 743263105 841 19,131 SH Sole 19,131 QCR Holdings Inc Common 74727A104 1,599 83,181 SH Sole 83,181 Royal Dutch Shell ADR Common 780259206 1,868 30,000 SH Sole 30,000 SAFECO Corporation Common 786429100 2,337 46,550 SH Sole 46,550 Schering-Plough Corporation Common 806605101 190 10,000 SH Sole 10,000 TNT N V Common 87260W101 139 4,034 SH Sole 4,034 TXU Corporation Common 873168108 2,686 60,000 SH Sole 60,000 Terra Industries Inc. Common 880915103 754 106,969 SH Sole 106,969 Treehouse Foods Inc Common 89469A104 256 9,652 SH Sole 9,652 UAL Corporation Common 902549807 485 12,156 SH Sole 12,156 U S Bancorp Common 902973304 24,012 787,284 SH Sole 787,284 Vectren Corporation Common 92240G101 703 26,658 SH Sole 26,658 Verizon Communications Inc Common 92343V104 1,907 55,997 SH Sole 55,997 Wachovia Corporation Common 929903102 1,682 30,008 SH Sole 30,008 Wells Fargo & Company Common 949746101 7,484 117,176 SH Sole 117,176 Wintrust Financial Corporation Common 97650W108 13,410 230,523 SH Sole 230,523 Xcel Energy Inc. Common 98389B100 1,271 70,000 SH Sole 70,000 Montpelier Re Holding Ltd Common G62185106 150 9,189 SH Sole 9,189 ------------------------------------------------------------------------------------------------------------------------------------ Report Summary Data Records 65 160,321 0 other managers on whose behalf report is filed