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
BERKSHIRE HATHAWAY-B-NEW CL B 084670702 167,166 832,125 SH   DFND   0 0 0
CARMAX INC COM 143130102 82,978 1,188,798 SH   DFND   0 0 0
AMETEK INC COM 031100100 63,275 762,627 SH   DFND   0 0 0
VISA INC CLASS-A CL A 92826C839 47,248 302,505 SH   DFND   0 0 0
ALPHABET INC CL-C CL C 02079K107 40,299 34,346 SH   DFND   0 0 0
HEICO CORP CLASS A CL A 422806208 39,725 472,577 SH   DFND   0 0 0
NVR INC COM 62944T105 37,960 13,719 SH   DFND   0 0 0
MARKEL CORP HOLDING COM 570535104 36,386 36,523 SH   DFND   0 0 0
JP MORGAN CHASE & CO COM 46625H100 32,203 318,115 SH   DFND   0 0 0
SCHWAB CHARLES CORP COM 808513105 31,519 737,124 SH   DFND   0 0 0
FORTUNE BRNDS HME&SEC COM 34964C106 28,423 596,993 SH   DFND   0 0 0
MOHAWK INDS INC COM 608190104 27,994 221,909 SH   DFND   0 0 0
FACEBOOK INC CL-A CL A 30303M102 27,433 164,573 SH   DFND   0 0 0
UNION PACIFIC CORP COM 907818108 26,219 156,810 SH   DFND   0 0 0
EDWARDS LIFESCIENCES CORP COM 28176E108 23,710 123,923 SH   DFND   0 0 0
DISNEY WALT COMPANY COM 254687106 21,080 189,856 SH   DFND   0 0 0
BANK AMER CORP COM 060505104 20,607 746,916 SH   DFND   0 0 0
BANK OZK COM 06417N103 20,132 694,672 SH   DFND   0 0 0
M & T BANK CORP COM 55261F104 19,854 126,443 SH   DFND   0 0 0
LITTELFUSE INC COM 537008104 19,852 108,790 SH   DFND   0 0 0
LKQ CORP COM 501889208 11,842 417,276 SH   DFND   0 0 0
O'REILLY AUTOMOTIVE COM 67103H107 11,187 28,811 SH   DFND   0 0 0
KEYSIGHT TECHNOLOGIES INC COM 49338L103 10,123 116,090 SH   DFND   0 0 0
HEALTH CARE SERVICES GRP COM 421906108 9,479 287,334 SH   DFND   0 0 0
ALPHABET INC CL-A CL A 02079K305 7,021 5,966 SH   DFND   0 0 0
SPDR S&P 500 ETF TR TR UNIT 78462F103 1,496 5,295 SH   DFND   0 0 0
LIBERTY MEDIA-C LIB FORM CL C 531229854 920 26,246 SH   DFND   0 0 0
BERKSHIRE HATHAWAY-A-NEW CL A 084670108 904 3 SH   DFND   0 0 0
LULULEMON ATHLETICA INC CO COM 550021109 761 4,645 SH   SOLE   0 0 0
BROOKFIELD ASSET MGT-A LV CL A 112585104 604 12,938 SH   DFND   0 0 0
TJX COMPANIES INC CM COM 872540109 497 9,341 SH   DFND   0 0 0
MASTERCARD INC CL-A CL A 57636Q104 480 2,039 SH   DFND   0 0 0
FIVE BELOW INC COM 33829M101 447 3,596 SH   DFND   0 0 0
ROPER TECHNOLOGIES INC COM 776696106 426 1,245 SH   SOLE   0 0 0
APPLE INC COM 037833100 404 2,127 SH   SOLE   0 0 0
OLD DOMINION FREIGHT LINE IN COM 679580100 372 2,577 SH   SOLE   0 0 0
FASTENAL CO COM 311900104 262 4,077 SH   DFND   0 0 0
KNIGHT SWIFT TRANSN HLDGS IN CL A 499049104 253 7,743 SH   SOLE   0 0 0
SOUTHWEST AIRLINES CO COM 844741108 206 3,961 SH   DFND   0 0 0