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 151,899 830,819 SH   DFND   0 0 0
CARMAX INC COM 143130102 59,353 1,102,593 SH   DFND   0 0 0
AMETEK INC COM 031100100 52,409 727,694 SH   DFND   0 0 0
VISA INC CLASS-A COM CL A 92826C839 47,335 293,788 SH   DFND   0 0 0
PROGRESSIVE CORP OHIO COM 743315103 41,685 564,538 SH   DFND   0 0 0
ALPHABET INC CL-C CAP STK CL C 02079K107 39,701 34,142 SH   DFND   0 0 0
MARKEL CORP HOLDING COM 570535104 38,228 41,199 SH   DFND   0 0 0
NVR INC COM 62944T105 35,654 13,878 SH   DFND   0 0 0
KEYSIGHT TECHNOLOGIES INC COM 49338L103 33,082 395,345 SH   DFND   0 0 0
HEICO CORP CLASS A CL A 422806208 30,703 480,490 SH   DFND   0 0 0
SCHWAB CHARLES CORP COM 808513105 29,838 887,497 SH   DFND   0 0 0
FACEBOOK INC CL-A CL A 30303M102 28,258 169,415 SH   DFND   0 0 0
JP MORGAN CHASE & CO COM 46625H100 29,052 322,693 SH   DFND   0 0 0
BANK OF AMERICA COM 060505104 27,602 1,300,157 SH   DFND   0 0 0
EDWARDS LIFESCIENCES CORP COM 28176E108 22,338 118,426 SH   DFND   0 0 0
FORTUNE BRNDS HME&SEC COM 34964C106 21,817 504,435 SH   DFND   0 0 0
FIVE BELOW INC COM 33829M101 18,430 261,868 SH   DFND   0 0 0
DISNEY WALT COMPANY COM 254687106 17,737 183,610 SH   DFND   0 0 0
AUTOHOME INC SP ADR RP CL A 05278C107 12,297 173,150 SH   DFND   0 0 0
LITTELFUSE INC COM 537008104 7,814 58,570 SH   DFND   0 0 0
UNION PACIFIC CORP COM 907818108 7,331 51,978 SH   DFND   0 0 0
HEALTH CARE SERVICES GRP COM 421906108 7,045 294,626 SH   DFND   0 0 0
ALPHABET INC CL-A CAP STK CL A 02079K305 7,700 6,627 SH   DFND   0 0 0
BANK OZK COM 06417N103 5,937 355,481 SH   DFND   0 0 0
SLEEP NUMBER CORP COM 83125X103 4,141 216,108 SH   DFND   0 0 0
LULULEMON ATHLETICA INC COM 550021109 880 4,645 SH   SOLE   0 0 0
BROOKFIELD ASSET MGT-A LV CL A LTD VT SH 112585104 343 11,634 SH   DFND   0 0 0
SPDR S&P 500 ETF TR UNIT 78462F103 1,365 5,295 SH   DFND   0 0 0
OLD DOMINION FREIGHT LINE COM 679580100 534 4,067 SH   SOLE   0 0 0
APPLE INC COM 037833100 600 2,358 SH   DFND   0 0 0
ROPER TECHNOLOGIES INC COM 776696106 388 1,245 SH   SOLE   0 0 0
MASTERCARD INC CL-A CL A 57636Q104 469 1,941 SH   DFND   0 0 0
TJX COMPANIES INC COM 872540109 425 8,892 SH   DFND   0 0 0
SS&C TECHNOLOGIES HLDGS INC COM 78467J100 346 7,895 SH   SOLE   0 0 0
SOUTHWEST AIRLINES CO COM 844741108 297 8,348 SH   DFND   0 0 0
LIBERTY MEDIA-C LIB FORM COM SER C FRMLA 531229854 289 10,630 SH   SOLE   0 0 0
FASTENAL CO COM 311900104 280 8,954 SH   SOLE   0 0 0
DELTA AIR LINES INC DEL COM NEW 247361702 265 9,296 SH   SOLE   0 0 0
KNIGHT-SWIFT TRANSPORT-A CL A 499049104 264 8,046 SH   SOLE   0 0 0
MOHAWK INDS INC COM 608190104 245 3,218 SH   SOLE   0 0 0
BERKSHIRE HATHAWAY INC -A CL A 084670108 816 3 SH   SOLE   0 0 0