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

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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 10,252 400,000 SH   SOLE   400,000 0 0
AMERICAN INTL GROUP INC W EXP 01/19/202 026874156 1,937 103,628 SH   SOLE   103,628 0 0
AMERICAN TOWER CORP NEW COM 03027X100 715,084 6,294,196 SH   SOLE   6,294,196 0 0
AMERICAN TOWER CORP NEW PFD CONV SER A 03027X308 11,250 100,000 SH   SOLE   100,000 0 0
AMERICAN TOWER CORP NEW PFD CONV SER B 03027X407 57,848 515,032 SH   SOLE   515,032 0 0
ANSYS INC COM 03662Q105 9,102 100,300 SH   SOLE   100,300 0 0
BANK OF AMERICA CORPORATION *W EXP 01/16/201 060505146 2,550 732,890 SH   SOLE   732,890 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 55,499 383,304 SH   SOLE   383,304 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 11,283 52 SH   SOLE   52 0 0
CARMAX INC COM 143130102 243,104 4,958,266 SH   SOLE   4,958,266 0 0
COLFAX CORP COM 194014106 161,406 6,100,000 SH   SOLE   6,100,000 0 0
CROWN CASTLE INTL CORP CNV PFD STK SR A 22822V200 2,420 20,000 SH   SOLE   20,000 0 0
CSX CORP COM 126408103 1,011 38,781 SH   SOLE   38,781 0 0
DANAHER CORP DEL COM 235851102 151,500 1,500,000 SH   SOLE   1,500,000 0 0
DIAMOND HILL INVESTMENT GROU COM NEW 25264R207 27,415 145,500 SH   SOLE   145,500 0 0
DOLLAR TREE INC COM 256746108 393,955 4,180,340 SH   SOLE   4,180,340 0 0
DULUTH HLDGS INC COM CL B 26443V101 8,561 350,000 SH   SOLE   350,000 0 0
ENSTAR GROUP LIMITED SHS G3075P101 234,328 1,446,559 SH   SOLE   1,446,559 0 0
LKQ CORP COM 501889208 112,535 3,550,000 SH   SOLE   3,550,000 0 0
LAMAR ADVERTISING CO CL A 512816109 3,268 49,297 SH   SOLE   49,297 0 0
MARKEL CORP COM 570535104 489,872 514,150 SH   SOLE   514,150 0 0
MASTERCARD INC CL A 57636Q104 413,892 4,700,118 SH   SOLE   4,700,118 0 0
MONRO MUFFLER BRAKE INC COM 610236101 95,844 1,507,930 SH   SOLE   1,507,930 0 0
MOODYS CORP COM 615369105 378,117 4,034,967 SH   SOLE   4,034,967 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 223,466 824,295 SH   SOLE   824,295 0 0
PRIMO WTR CORP COM 74165N105 19,833 1,679,313 SH   SOLE   1,679,313 0 0
ROPER INDS INC NEW COM 776696106 255,693 1,499,141 SH   SOLE   1,499,141 0 0
SBA COMMUNICATIONS CORP COM 78388J106 201,308 1,865,000 SH   SOLE   1,865,000 0 0
TD AMERITRADE HLDG CORP COM 87236Y108 84,500 2,967,500 SH   SOLE   2,967,500 0 0
UBIQUITI NETWORKS INC COM 90347A100 103,609 2,680,000 SH   SOLE   2,680,000 0 0
VERISK ANALYTICS INC CL A 92345Y106 209,592 2,584,998 SH   SOLE   2,584,998 0 0
VISA INC COM CL A 92826C839 268,130 3,615,080 SH   SOLE   3,615,080 0 0
WMIH Corp COM 92936P100 3,330 1,500,000 SH   SOLE   1,500,000 0 0