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, 2008 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: Executive Vice President and Chief Investment Officer Phone: 804-527-3806 Signature, Place, and Date of Signing: Thomas S. Gayner Richmond, VA 5/12/2008 ---------------------- ---------------------------- ------------------- [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: 120 ---------- Form 13F Information Table Value Total: $1,809,973 ---------- (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 Markel Corporation FORM 13F March 31, 2008 Voting Authority Value Shares/ Sh/ Put/ Invstmt Other --------------------- Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None ------------------------------ -------------- --------- -------- ------- --- ---- ------- -------- ------- ------ ------ 3M Company COM 88579y101 4749 60000 SH Sole 60000 902 11400 SH Defined 01 10000 1400 Accenture COM g1150g111 1055 30000 SH Defined 01 30000 Aflac COM 001055102 1948 30000 SH Sole 30000 19947 307120 SH Defined 01 305000 2120 Alleghany Corporation COM 017175100 1393 4080 SH Sole 4080 Allied Capital COM 01903Q108 7009 380315 SH Defined 01 364015 16300 Altria COM 02209S103 2591 116700 SH Defined 01 114500 2200 American Express COM 025816109 437 10000 SH Sole 10000 17091 390928 SH Defined 01 339000 51928 American International Group COM 026874107 865 20000 SH Sole 20000 993 22955 SH Defined 01 20000 2955 Anheuser Busch COM 035229103 949 20000 SH Sole 20000 72774 1533704 SH Defined 01 1423000 110704 Automatic Data Processing COM 053015103 12997 306600 SH Defined 01 300700 5900 Bank of America COM 060505104 19903 525000 SH Sole 525000 7216 190346 SH Defined 01 130000 60346 Bank of New York Mellon Corp COM 064058100 1378 33019 SH Sole 33019 15003 359523 SH Defined 01 334907 24616 Berkshire Hathaway Class B COM 084670207 15320 3425 SH Sole 3425 125447 28046 SH Defined 01 26575 1471 Berkshire Hathaway, Inc. COM 084670108 14007 105 SH Sole 105 106320 797 SH Defined 01 755 42 Brookfield Asset Management COM 112585104 5559 207205 SH Sole 207205 44057 1642084 SH Defined 01 1425343 216741 Brookfield Infrastructure Part COM G16252101 124 7288 SH Sole 7288 919 54204 SH Defined 01 50613 3591 Brown & Brown COM 115236101 6355 365628 SH Defined 01 365628 Brown Forman Class A COM 115637100 19654 283860 SH Defined 01 281000 2860 CB Richard Ellis Group COM 12497T101 1082 50000 SH Defined 01 50000 Carmax COM 143130102 3107 160000 SH Sole 160000 101228 5212558 SH Defined 01 4803070 409488 Caterpillar Inc COM 149123101 10569 135000 SH Sole 135000 4877 62300 SH Defined 01 60000 2300 Charles Schwab COM 808513105 1036 55000 SH Sole 55000 8479 450300 SH Defined 01 450000 300 Cincinnati Financial COM 172062101 16594 436236 SH Defined 01 430686 5550 Cintas Corp COM 172908105 1142 40000 SH Sole 40000 856 30000 SH Defined 01 30000 Citigroup COM 172967101 4391 205000 SH Sole 205000 24652 1150902 SH Defined 01 1150000 902 Cohen & Steers COM 19247a100 1743 65800 SH Defined 01 60000 5800 Comcast COM 20030N101 10782 557500 SH Sole 557500 6658 344250 SH Defined 01 255000 89250 Corus Bankshares COM 220873103 3084 317000 SH Defined 01 317000 Diageo PLC COM 25243Q205 2440 30000 SH Sole 30000 100448 1235219 SH Defined 01 1160000 75219 Disney COM 254687106 3897 124175 SH Defined 01 110000 14175 Emerson Electric COM 291011104 5059 98300 SH Defined 01 85000 13300 Exxon Corporation COM 302290101 31396 371193 SH Defined 01 354800 16393 Fairfax Financial Holdings Ltd COM 303901102 80233 279459 SH Sole 279459 Federated Investors COM 314211103 392 10000 SH Sole 10000 6501 166000 SH Defined 01 165000 1000 Fidelity National Financial COM 31620R105 18330 1000000 SH Sole 1000000 12057 657800 SH Defined 01 550000 107800 Forest City Enterprises Class COM 345550107 29899 812467 SH Defined 01 782400 30067 Fortune Brands COM 349631101 1737 25000 SH Defined 01 25000 Friedman Billings and Ramsey COM 358434108 365 215000 SH Sole 215000 3 Markel Corporation FORM 13F March 31, 2008 Voting Authority Value Shares/ Sh/ Put/ Invstmt Other --------------------- Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None ------------------------------ -------------- --------- -------- ------- --- ---- ------- -------- ------- ------ ------ 807 475000 SH Defined 01 475000 General Dynamics COM 369550108 32882 394407 SH Defined 01 370000 24407 General Electric COM 369604103 16840 455000 SH Sole 455000 118517 3202304 SH Defined 01 3000000 202304 Goldman Sachs COM 38141G104 1654 10000 SH Defined 01 10000 Home Depot COM 437076102 559 20000 SH Sole 20000 28036 1002345 SH Defined 01 900000 102345 Illinois Tool Works COM 452308109 10128 210000 SH Sole 210000 1611 33400 SH Defined 01 10000 23400 Intel COM 458140100 1271 60000 SH Sole 60000 3127 147642 SH Defined 01 140000 7642 International Business Machine COM 459200101 1151 10000 SH Sole 10000 1215 10550 SH Defined 01 10000 550 International Game Technology COM 459902102 10052 250000 SH Sole 250000 35368 879580 SH Defined 01 790000 89580 International Speedway COM 460335201 2416 58650 SH Defined 01 57300 1350 Investors Title Company COM 461804106 11268 229950 SH Defined 01 213300 16650 Johnson and Johnson COM 478160104 4865 75000 SH Sole 75000 29902 460945 SH Defined 01 447200 13745 LandAmerica Financial Group COM 514936103 36727 930500 SH Sole 930500 Leucadia National Corp COM 527288104 3391 75000 SH Sole 75000 2826 62500 SH Defined 01 60000 2500 Lowes COM 548661107 2179 95000 SH Sole 95000 3712 161800 SH Defined 01 150000 11800 Marriott International COM 571903202 5326 155000 SH Sole 155000 38059 1107646 SH Defined 01 975000 132646 Marsh & McLennan COM 571748102 1461 60000 SH Sole 60000 26044 1069556 SH Defined 01 1043000 26556 McGraw-Hill Companies COM 580645109 17027 460800 SH Defined 01 460000 800 Meadowbrook Insurance Company COM 58319P108 2275 291300 SH Sole 291300 Microsoft COM 594918104 249 8790 SH Defined 01 8790 News Corporation COM 65248E203 5534 290650 SH Defined 01 275000 15650 Northern Trust Corp COM 665859104 1329 20000 SH Sole 20000 7976 120000 SH Defined 01 120000 NuStar GP Holdings COM 67059L102 2025 80000 SH Sole 80000 9598 379200 SH Defined 01 375000 4200 Pepsico COM 713448108 2419 33500 SH Defined 01 33300 200 Philip Morris International COM 718172109 5903 116700 SH Defined 01 114500 2200 Plum Creek Lumber MLP COM 729251108 14477 355700 SH Defined 01 350000 5700 Progressive Corp COM 743315103 748 46516 SH Defined 01 46516 RLI Corporation COM 749607107 31225 629913 SH Defined 01 598637 31276 SAP Aktiengesellschaft COM 803054204 1487 30000 SH Defined 01 30000 State Street Corp COM 857477103 3192 40400 SH Defined 01 40400 Sysco Corp COM 871829107 2467 85000 SH Sole 85000 20190 695717 SH Defined 01 615000 80717 T.Rowe Price COM 74144T108 550 11000 SH Sole 11000 7950 159000 SH Defined 01 159000 United Parcel Service COM 911312106 20446 280000 SH Sole 280000 30498 417670 SH Defined 01 360000 57670 Valley National Bank COM 919794107 2432 126607 SH Defined 01 125132 1475 W.P. Carey COM 92930Y107 28454 949400 SH Defined 01 925200 24200 Wachovia COM 929903102 346 12797 SH Defined 01 12797 Wal-Mart Stores COM 931142103 3688 70000 SH Sole 70000 39145 743062 SH Defined 01 665000 78062 Walgreen COM 931422109 1333 35000 SH Sole 35000 1168 30660 SH Defined 01 30000 660 Washington Post Co COM 939640108 3589 5425 SH Defined 01 5200 225 Washington Real Estate Investm COM 939653101 13518 404475 SH Defined 01 390300 14175 4 Markel Corporation FORM 13F March 31, 2008 Voting Authority Value Shares/ Sh/ Put/ Invstmt Other --------------------- Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None ------------------------------ -------------- --------- -------- ------- --- ---- ------- -------- ------- ------ ------ White Mountains COM G9618E107 17748 36975 SH Sole 36975 44796 93325 SH Defined 01 93325 XL Capital COM G98255105 13882 469796 SH Defined 01 469138 658 Yum! Brands Inc COM 988498101 923 24800 SH Defined 01 20000 4800 REPORT SUMMARY 120 DATA RECORDS 1809973 1 OTHER MANAGERS ON WHOSE BEHALF REPORT IS FILED 5