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
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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
ALPHABET INC CL-A CL A 02079K305 5,864 6,022 SH   DFND   6,022 0 0
ALPHABET INC CL-C CL C 02079K107 23,371 24,367 SH   DFND   24,367 0 0
AMETEK INC COM 031100100 45,453 688,266 SH   DFND   688,266 0 0
BALCHEM CORP COM 057665200 184 2,266 SH   DFND   2,266 0 0
BANK OF THE OZARKS INC COM 063904106 58,724 1,222,142 SH   DFND   1,222,142 0 0
BERKSHIRE HATHAWAY-A-NEW CL A 084670108 824 3 SH   DFND   3 0 0
BERKSHIRE HATHAWAY-B-NEW CL B 084670702 129,718 707,604 SH   DFND   707,604 0 0
BROOKFIELD ASSET MGT-A LV CL A 112585104 534 12,938 SH   DFND   12,938 0 0
CARMAX INC COM 143130102 70,893 935,147 SH   DFND   935,147 0 0
DISNEY WALT COMPANY COM 254687106 34,660 351,633 SH   DFND   351,633 0 0
FASTENAL CO COM 311900104 186 4,077 SH   DFND   4,077 0 0
FIVE BELOW INC COM 33829M101 604 11,009 SH   DFND   11,009 0 0
FORTUNE BRANDS HOME & SEC COM 34964C106 21,319 317,101 SH   DFND   317,101 0 0
HANESBRANDS INC COM 410345102 302 12,264 SH   DFND   12,264 0 0
HEICO CORP CLASS A CL A 422806208 23,009 301,957 SH   DFND   301,957 0 0
JP MORGAN CHASE & CO COM 46625H100 1,407 14,736 SH   DFND   14,736 0 0
LIBERTY MEDIA-C LIB FORM CL C 531229854 24,261 636,941 SH   DFND   636,941 0 0
LKQ CORP COM 501889208 39,579 1,099,718 SH   DFND   1,099,718 0 0
LULULEMON ATHLETICA INC CO COM 550021109 286 4,600 SH   SOLE   4,600 0 0
M & T BANK CORP COM 55261F104 25,056 155,586 SH   DFND   155,586 0 0
MARKEL CORP HOLDING COM 570535104 32,527 30,457 SH   DFND   30,457 0 0
MASTERCARD INC CL A 57636Q104 452 3,204 SH   DFND   3,204 0 0
MOHAWK INDS INC COM 608190104 26,391 106,627 SH   DFND   106,627 0 0
O'REILLY AUTOMOTIVE COM 67103H107 20,089 93,276 SH   DFND   93,276 0 0
SOUTHWEST AIRLINES CO COM 844741108 222 3,961 SH   DFND   3,961 0 0
SPDR S&P 500 ETF TR TR UNIT 78462F103 1,343 5,344 SH   DFND   5,344 0 0
STANTEC INC COM 85472N109 595 21,454 SH   SOLE   21,454 0 0
TJX COMPANIES INC COM 872540109 309 4,197 SH   DFND   4,197 0 0
UNION PACIFIC CORP COM 907818108 31,275 269,683 SH   DFND   269,683 0 0
VISA INC CL A 92826C839 35,676 338,992 SH   DFND   338,992 0 0
WELLS FARGO CO COM 949746101 29,319 531,629 SH   DFND   531,629 0 0