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
ADOBE INC COM 00724F101 362,794 1,140,000 SH   SOLE   1,140,000 0 0
ALARM COM HLDGS INC COM 011642105 68,928 1,771,470 SH   SOLE   1,771,470 0 0
AMERICAN TOWER CORP NEW COM 03027X100 1,533,315 7,041,629 SH   SOLE   7,041,629 0 0
ANSYS INC COM 03662Q105 108,948 468,656 SH   SOLE   468,656 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,633 47,216 SH   SOLE   47,216 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 816 3 SH   SOLE   3 0 0
BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 318,334 7,194,000 SH   SOLE   7,194,000 0 0
CARMAX INC COM 143130102 440,888 8,190,371 SH   SOLE   8,190,371 0 0
COLONY CAP INC NEW CL A COM 19626G108 2,622 1,498,382 SH   SOLE   1,498,382 0 0
COSTAR GROUP INC COM 22160N109 257,381 438,312 SH   SOLE   438,312 0 0
DANAHER CORP DEL COM 235851102 229,110 1,655,300 SH   SOLE   1,655,300 0 0
DESCARTES SYS GROUP INC COM 249906108 7,129 207,300 SH   SOLE   207,300 0 0
DOLLAR TREE INC COM 256746108 334,452 4,552,230 SH   SOLE   4,552,230 0 0
GOOSEHEAD INS INC COM CL A 38267D109 7,684 172,168 SH   SOLE   172,168 0 0
KKR & CO L P DEL COM UNITS 48251W104 332,981 14,187,536 SH   SOLE   14,187,536 0 0
LAMAR ADVERTISING CO CL A 512816109 2,489 48,530 SH   SOLE   48,530 0 0
LIVE NATION ENTERTAINMENT IN COM 538034109 249,177 5,481,238 SH   SOLE   5,481,238 0 0
MARKEL CORP COM 570535104 461,524 497,391 SH   SOLE   497,391 0 0
MARRIOTT INTL INC NEW CL A 571903202 561 7,500 SH   SOLE   7,500 0 0
MASTERCARD INC CL A 57636Q104 1,397,735 5,786,287 SH   SOLE   5,786,287 0 0
MOODYS CORP COM 615369105 1,192,509 5,638,341 SH   SOLE   5,638,341 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 554,827 1,842,974 SH   SOLE   1,842,974 0 0
OLLIES BARGAIN OUTLT HLDGS I COM 681116109 23,170 500,000 SH   SOLE   500,000 0 0
PRIMO WTR CORP COM 74167P108 14,323 1,580,878 SH   SOLE   1,580,878 0 0
ROPER INDS INC NEW COM 776696106 531,670 1,705,110 SH   SOLE   1,705,110 0 0
SBA COMMUNICATIONS CORP COM 78410G104 665,476 2,465,000 SH   SOLE   2,465,000 0 0
VERISK ANALYTICS INC CL A 92345Y106 341,348 2,449,047 SH   SOLE   2,449,047 0 0
VISA INC COM CL A 92826C839 844,812 5,243,370 SH   SOLE   5,243,370 0 0