================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter: March 31, 2012 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: Markel Corporation ________________________________________________ Address: 4521 Highwoods Pkwy ________________________________________________ Glen Allen, VA 23060 ________________________________________________ Form 13F File Number: 28-6647 _______ 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: Thomas S. Gayner ________________________________________________ Title: President and Chief Investment Officer ________________________________________________ Phone: 804-527-3806 ________________________________________________ Signature, Place, and Date of Signing: /s/ Thomas S. Gayner Richmond, VA 05/14/2012 _______________________ ________________________ _______________________ [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).) ================================================================================ 1 Form 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 1 ___________ Form 13F Information Table Entry Total: 131 ___________ Form 13F Information Table Value Total: $ 2,168,987 ___________ (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. No. Form 13F File Number Name ___ _____________________ ______________________________________ 1 28-6056 Markel Gayner Asset Management Corporation FORM 13F INFORMATION TABLE VOTING AUTHORITY TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT OTHER NAME OF ISSUER CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE -------------- -------- --------- -------- ------- --- ---- -------- -------- ------- ------ ------ 3M Company COM 88579y101 2676 30000 SH SOLE 30000 15505 173800 SH DEFINED 01 171000 2800 Accenture COM G1151C101 645 10000 SH SOLE 10000 6837 106000 SH DEFINED 01 100000 6000 Air Products & Chemicals COM 009158106 257 2800 SH DEFINED 01 2800 Alleghany Corporation COM 017175100 1424 4328 SH SOLE 4328 Altria COM 02209S103 3556 115200 SH DEFINED 01 114500 700 American Express COM 025816109 579 10000 SH SOLE 10000 21269 367595 SH DEFINED 01 339000 28595 Anheuser-Busch Inbev ADR COM 03524A108 29277 402601 SH DEFINED 01 390000 12601 Archer Daniels COM 039483102 11904 376000 SH DEFINED 01 375000 1000 Artio Global Investors COM 04315B107 6719 1408600 SH DEFINED 01 1401600 7000 Automatic Data Processing COM 053015103 28655 519200 SH DEFINED 01 507700 11500 Bank of New York Mellon Corp COM 064058100 73 3019 SH SOLE 3019 5603 232187 SH DEFINED 01 214907 17280 Barrett Business Systems COM 068463108 208 10500 SH DEFINED 01 10000 500 Berkshire Hathaway Class B COM 084670702 39366 485100 SH SOLE 485100 87492 1078157 SH DEFINED 01 1026507 51650 Berkshire Hathaway, Inc. 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COM 26875p101 9321 83900 SH DEFINED 01 83500 400 Eagle Materials COM 26969p108 2033 58500 SH DEFINED 01 58500 Ecolab COM 278865100 2987 48400 SH DEFINED 01 48000 400 Emerson Electric COM 291011104 9022 172900 SH DEFINED 01 158000 14900 Enterprise Products Lmtd Ptnsh COM 293792107 318 6300 SH DEFINED 01 6300 Expeditors Int'l Wash Inc COM 302130109 2837 61000 SH DEFINED 01 61000 Exxon Corporation COM 30231G102 17329 199800 SH SOLE 199800 53309 614659 SH DEFINED 01 579000 35659 Fairfax Financial Holdings Ltd COM 303901102 107533 267104 SH SOLE 267104 4974 12355 SH DEFINED 01 12355 Federated Investors COM 314211103 224 10000 SH SOLE 10000 47890 2137000 SH DEFINED 01 2114000 23000 Fidelity National Financial COM 31620R105 12428 689300 SH DEFINED 01 663000 26300 General Dynamics COM 369550108 29194 397841 SH DEFINED 01 382000 15841 General Electric COM 369604103 27344 1362450 SH SOLE 1362450 20943 1043494 SH DEFINED 01 942550 100944 Heritage Crystal Clean Inc COM 42726M106 4778 239500 SH DEFINED 01 239500 Home Depot COM 437076102 1006 20000 SH SOLE 20000 47550 945134 SH DEFINED 01 900000 45134 ITC Holdings Corp COM 465685105 6401 83200 SH DEFINED 01 83000 200 Illinois Tool Works COM 452308109 14203 248647 SH DEFINED 01 230000 18647 Intel COM 458140100 1687 60000 SH SOLE 60000 21804 775542 SH DEFINED 01 750000 25542 International Business Machine COM 459200101 2086 10000 SH SOLE 10000 2191 10500 SH DEFINED 01 10000 500 International Game Technology COM 459902102 4197 250000 SH SOLE 250000 14505 863888 SH DEFINED 01 820000 43888 Investors Title Company COM 461804106 10271 219850 SH DEFINED 01 213300 6550 Johnson and Johnson COM 478160104 18469 280000 SH SOLE 280000 18640 282595 SH DEFINED 01 271700 10895 Lennar Corp-B COM 526057302 2273 101700 SH DEFINED 01 101700 Lennox International COM 526107107 10216 253500 SH DEFINED 01 253000 500 Leucadia National Corp COM 527288104 17115 655766 SH DEFINED 01 635000 20766 Loews Corporation COM 540424108 7994 200500 SH DEFINED 01 195000 5500 Louisiana Pacific Corp COM 546347105 1094 117000 SH DEFINED 01 117000 Lowes COM 548661107 2981 95000 SH SOLE 95000 14331 456700 SH DEFINED 01 430000 26700 Marriott International COM 571903202 6887 181965 SH SOLE 181965 45290 1196574 SH DEFINED 01 1101907 94667 Marriott Vacations Worldwide COM 57164Y107 519 18196 SH SOLE 18196 3298 115681 SH DEFINED 01 110186 5495 Mastercard, Inc COM 57636Q104 1262 3000 SH DEFINED 01 3000 McCormick and Company COM 579780206 925 17000 SH DEFINED 01 17000 McDonalds COM 580135101 18326 186808 SH DEFINED 01 181000 5808 Microsoft Corp COM 594918104 25742 798090 SH DEFINED 01 784000 14090 Mosaic Company COM 61945c103 1493 27000 SH DEFINED 01 27000 National Oilwell COM 637071101 6755 85000 SH DEFINED 01 85000 Nicholas Financial COM 65373j209 2025 153500 SH DEFINED 01 153500 Nike COM 654106103 5444 50200 SH DEFINED 01 50000 200 Northern Trust Corp COM 665859104 6643 140000 SH DEFINED 01 140000 Novo-Nordisk A/S COM 670100205 31487 227000 SH DEFINED 01 215000 12000 NuStar GP Holdings COM 67059L102 208 6000 SH DEFINED 01 6000 Oracle Corp COM 68389x105 15029 515400 SH DEFINED 01 490000 25400 Patterson Companies Inc. 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