The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
ALARM COM HLDGS INC COM 011642105 12,296 400,000 SH   SOLE   400,000 0 0
AMERICAN TOWER CORP NEW COM 03027X100 814,208 6,699,098 SH   SOLE   6,699,098 0 0
AMERICAN TOWER CORP NEW PFD CONV SER A 03027X308 11,422 100,000 SH   SOLE   100,000 0 0
AMERICAN TOWER CORP NEW PFD CONV SER B 03027X407 57,497 514,748 SH   SOLE   514,748 0 0
BANK AMER CORP W EXP 01/16/201 060505146 8,282 732,890 SH   SOLE   732,890 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 64,047 384,249 SH   SOLE   384,249 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 10,494 42 SH   SOLE   42 0 0
CARMAX INC COM 143130102 305,426 5,157,481 SH   SOLE   5,157,481 0 0
COLFAX CORP COM 194014106 184,416 4,697,300 SH   SOLE   4,697,300 0 0
CSX CORP COM 126408103 228 4,899 SH   SOLE   4,899 0 0
DANAHER CORP DEL COM 235851102 141,578 1,655,300 SH   SOLE   1,655,300 0 0
DIAMOND HILL INVESTMENT GROU COM NEW 25264R207 28,307 145,500 SH   SOLE   145,500 0 0
DOLLAR GEN CORP NEW COM 256677105 104,595 1,500,000 SH   SOLE   1,500,000 0 0
DOLLAR TREE INC COM 256746108 329,211 4,195,913 SH   SOLE   4,195,913 0 0
ENSTAR GROUP LIMITED SHS G3075P101 276,671 1,446,269 SH   SOLE   1,446,269 0 0
FORTIVE CORP COM 34959J108 45,165 750,000 SH   SOLE   750,000 0 0
LKQ CORP COM 501889208 103,908 3,550,000 SH   SOLE   3,550,000 0 0
LAMAR ADVERTISING CO CL A 512816109 3,627 48,530 SH   SOLE   48,530 0 0
MARKEL CORP COM 570535104 501,508 513,914 SH   SOLE   513,914 0 0
MASTERCARD INC CL A 57636Q104 599,373 5,329,183 SH   SOLE   5,329,183 0 0
MONRO MUFFLER BRAKE INC COM 610236101 83,237 1,597,630 SH   SOLE   1,597,630 0 0
MOODYS CORP COM 615369105 636,368 5,679,831 SH   SOLE   5,679,831 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 222,620 825,009 SH   SOLE   825,009 0 0
PRIMO WTR CORP COM 74165N105 22,805 1,679,313 SH   SOLE   1,679,313 0 0
ROPER INDS INC NEW COM 776696106 322,622 1,562,410 SH   SOLE   1,562,410 0 0
SBA COMMUNICATIONS CORP COM 78388J106 296,712 2,465,000 SH   SOLE   2,465,000 0 0
TD AMERITRADE HLDG CORP COM 87236Y108 115,317 2,967,500 SH   SOLE   2,967,500 0 0
UBIQUITI NETWORKS INC COM 90347A100 134,697 2,680,000 SH   SOLE   2,680,000 0 0
VERISK ANALYTICS INC CL A 92345Y106 210,192 2,590,486 SH   SOLE   2,590,486 0 0
VISA INC COM CL A 92826C839 434,487 4,889,020 SH   SOLE   4,889,020 0 0
WMIH Corp COM 92936P100 2,117 1,460,000 SH   SOLE   1,460,000 0 0