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
BERKSHIRE HATHAWAY-B-NEW CL B NEW 084670702 201,760 890,774 SH   DFND   0 0 0
CARMAX INC COM 143130102 102,572 1,169,978 SH   DFND   0 0 0
AMETEK INC COM 031100100 83,068 832,848 SH   DFND   0 0 0
NVR INC COM 62944T105 57,492 15,096 SH   DFND   0 0 0
VISA INC CLASS-A COM CL A 92826C839 59,105 314,558 SH   DFND   0 0 0
HEICO CORP CLASS A CL A 422806208 44,918 501,709 SH   DFND   0 0 0
MARKEL CORP HOLDING COM 570535104 44,597 39,012 SH   DFND   0 0 0
ALPHABET INC CL-C CAP STK CL C 02079K107 48,805 36,503 SH   DFND   0 0 0
JP MORGAN CHASE & CO COM 46625H100 47,399 340,025 SH   DFND   0 0 0
SCHWAB CHARLES CORP COM 808513105 45,271 951,877 SH   DFND   0 0 0
FORTUNE BRNDS HME&SEC COM 34964C106 41,119 629,314 SH   DFND   0 0 0
FACEBOOK INC CL-A CL A 30303M102 37,609 183,236 SH   DFND   0 0 0
KEYSIGHT TECHNOLOGIES INC COM 49338L103 40,844 397,970 SH   DFND   0 0 0
BANK OF AMERICA COM 060505104 33,957 964,147 SH   DFND   0 0 0
EDWARDS LIFESCIENCES CORP COM 28176E108 29,981 128,515 SH   DFND   0 0 0
DISNEY WALT COMPANY COM 254687106 28,917 199,940 SH   DFND   0 0 0
UNION PACIFIC CORP COM 907818108 29,278 161,944 SH   DFND   0 0 0
M & T BANK CORP COM 55261F104 23,658 139,368 SH   DFND   0 0 0
LITTELFUSE INC COM 537008104 22,262 116,370 SH   DFND   0 0 0
PROGRESSIVE CORP OHIO COM 743315103 32,531 449,389 SH   DFND   0 0 0
BANK OZK COM 06417N103 11,793 386,580 SH   DFND   0 0 0
O'REILLY AUTOMOTIVE COM 67103H107 12,113 27,638 SH   DFND   0 0 0
HEALTH CARE SERVICES GRP COM 421906108 7,775 319,710 SH   DFND   0 0 0
ALPHABET INC CL-A CAP STK CL A 02079K305 8,532 6,370 SH   DFND   0 0 0
LULULEMON ATHLETICA INC COM 550021109 1,076 4,645 SH   SOLE   0 0 0
BROOKFIELD ASSET MGT-A LV CL A LTD VT SH 112585104 748 12,938 SH   DFND   0 0 0
SPDR S&P 500 ETF TR UNIT 78462F103 1,704 5,295 SH   DFND   0 0 0
OLD DOMINION FREIGHT LINE COM 679580100 515 2,712 SH   SOLE   0 0 0
FIVE BELOW INC COM 33829M101 460 3,596 SH   DFND   0 0 0
ROPER TECHNOLOGIES INC COM 776696106 441 1,245 SH   SOLE   0 0 0
LIBERTY MEDIA-C LIB FORM CL C 531229854 489 10,630 SH   DFND   0 0 0
MOHAWK INDS INC COM 608190104 439 3,218 SH   DFND   0 0 0
TJX COMPANIES INC COM 872540109 548 8,972 SH   DFND   0 0 0
APPLE INC COM 037833100 625 2,127 SH   SOLE   0 0 0
MASTERCARD INC CL-A CL A 57636Q104 580 1,941 SH   DFND   0 0 0
KNIGHT-SWIFT TRANSPORT-A CL A 499049104 288 8,046 SH   SOLE   0 0 0
FASTENAL CO COM 311900104 301 8,154 SH   DFND   0 0 0
SOUTHWEST AIRLINES CO COM 844741108 451 8,348 SH   DFND   0 0 0
BERKSHIRE HATHAWAY-A-NEW CL A 084670108 1,008 3 SH   SOLE   0 0 0