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
58 COM INC SPON ADR REP A 31680Q104 74,777 963,627 SH   SOLE   963,627 0 0
ALIBABA GROUP HLDG LTD SPONSORED ADS 01609W102 215 1,203 SH   SOLE   1,203 0 0
ALPHABET INC CAP STK CL C 02079K107 892,556 888,505 SH   SOLE   888,505 0 0
ALPHABET INC CAP STK CL A 02079K305 901,130 896,486 SH   SOLE   896,486 0 0
ALTABA INC COM 021346101 217,920 3,000,000 SH   SOLE   3,000,000 0 0
AMAZON COM INC COM 023135106 968,225 676,409 SH   SOLE   676,409 0 0
AMERICAN ELEC PWR INC COM 025537101 988 14,390 SH   SOLE   14,390 0 0
AMERICAN EXPRESS CO COM 025816109 1,245 13,500 SH   SOLE   13,500 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 994,878 3,372 SH   SOLE   3,372 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 256,977 1,306,639 SH   SOLE   1,306,639 0 0
BMC STK HLDGS INC COM 05591B109 78,000 4,000,000 SH   SOLE   4,000,000 0 0
BOOKING HLDGS INC COM 09857L108 359,228 174,833 SH   SOLE   174,833 0 0
BUILDERS FIRSTSOURCE INC COM 12008R107 78,585 4,007,377 SH   SOLE   4,007,377 0 0
CAPITAL ONE FINL CORP COM 14040H105 150,926 1,601,000 SH   SOLE   1,601,000 0 0
CARMAX INC COM 143130102 724,804 11,952,575 SH   SOLE   11,952,575 0 0
COCA COLA CO COM 191216100 1,630 37,630 SH   SOLE   37,630 0 0
COSTCO WHSL CORP NEW COM 22160K105 3,820 20,805 SH   SOLE   20,805 0 0
CREDIT ACCEP CORP MICH COM 225310101 352,375 1,085,532 SH   SOLE   1,085,532 0 0
CRESUD S A C I F Y A SPONSORED ADR 226406106 12,517 616,883 SH   SOLE   616,883 0 0
DENTSPLY SIRONA INC COM 24906P109 1,941 38,852 SH   SOLE   38,852 0 0
EDISON INTL COM 281020107 1,903 30,165 SH   SOLE   30,165 0 0
EMCOR GROUP INC COM 29084Q100 1,168 15,378 SH   SOLE   15,378 0 0
EXPEDITORS INTL WASH INC COM 302130109 6,733 109,267 SH   SOLE   109,267 0 0
FACEBOOK INC CL A 30303M102 333,957 2,182,298 SH   SOLE   2,182,298 0 0
FASTENAL CO COM 311900104 202 3,795 SH   SOLE   3,795 0 0
FIAT CHRYSLER AUTOMOBILES N SHS N31738102 489,706 24,558,965 SH   SOLE   24,558,965 0 0
GOLDMAN SACHS GROUP INC COM 38141G104 1,760 7,056 SH   SOLE   7,056 0 0
HDFC BANK LTD ADR REPS 3 SHS 40415F101 820 8,464 SH   SOLE   8,464 0 0
IDEXX LABS INC COM 45168D104 254 1,343 SH   SOLE   1,343 0 0
IRSA INVERSIONES Y REP S A GLOBL DEP RCPT 450047204 13,928 601,400 SH   SOLE   601,400 0 0
IRSA PROPIEDADES COMERCIALES SPONSORED ADR 463588103 4,450 100,000 SH   SOLE   100,000 0 0
JACOBS ENGR GROUP INC DEL COM 469814107 308,941 5,432,406 SH   SOLE   5,432,406 0 0
JD COM INC SPON ADR CL A 47215P106 266,643 6,664,408 SH   SOLE   6,664,408 0 0
JPMORGAN CHASE & CO *W EXP 10/28/201 46634E114 40,578 600,000 SH   SOLE   600,000 0 0
LIBERTY BROADBAND CORP COM SER C 530307305 230,566 2,747,777 SH   SOLE   2,747,777 0 0
LIBERTY BROADBAND CORP COM SER A 530307107 94,410 1,138,018 SH   SOLE   1,138,018 0 0
LIBERTY MEDIA CORP DELAWARE COM SER C FRMLA 531229854 460,405 14,914,326 SH   SOLE   14,914,326 0 0
LIBERTY MEDIA CORP DELAWARE COM SER A FRMLA 531229870 10,442 357,227 SH   SOLE   357,227 0 0
MASTERCARD INCORPORATED CL A 57636Q104 495,621 2,909,428 SH   SOLE   2,909,428 0 0
MERITAGE HOMES CORP COM 59001A102 16,434 368,900 SH   SOLE   368,900 0 0
MOHAWK INDS INC COM 608190104 316,843 1,384,260 SH   SOLE   1,384,260 0 0
NETSHOES CAYMAN LTD COM G6455X107 10,417 1,677,447 SH   SOLE   1,677,447 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 3,399 14,002 SH   SOLE   14,002 0 0
OMNICOM GROUP INC COM 681919106 143,306 1,972,830 SH   SOLE   1,972,830 0 0
PRIMERICA INC COM 74164M108 90,331 932,205 SH   SOLE   932,205 0 0
PROCTER AND GAMBLE CO COM 742718109 1,400 17,760 SH   SOLE   17,760 0 0
PROGRESSIVE CORP OHIO COM 743315103 1,061 17,557 SH   SOLE   17,557 0 0
SCHWAB CHARLES CORP NEW COM 808513105 423,197 8,314,292 SH   SOLE   8,314,292 0 0
SECOO HLDG LTD ADR 81367P101 10,320 1,000,000 SH   SOLE   1,000,000 0 0
SINCLAIR BROADCAST GROUP INC CL A 829226109 42,725 1,365,000 SH   SOLE   1,365,000 0 0
SPS COMM INC COM 78463M107 18,322 295,000 SH   SOLE   295,000 0 0
TJX COS INC NEW COM 872540109 475,791 5,896,532 SH   SOLE   5,896,532 0 0
TRIMBLE INC COM 896239100 424 12,186 SH   SOLE   12,186 0 0
UNION PAC CORP COM 907818108 1,794 13,720 SH   SOLE   13,720 0 0
VISA INC COM CL A 92826C839 240,401 2,054,885 SH   SOLE   2,054,885 0 0
WATERS CORP COM 941848103 2,076 10,455 SH   SOLE   10,455 0 0
WAYFAIR INC CL A 94419L101 54,113 830,718 SH   SOLE   830,718 0 0
WELLS FARGO CO NEW COM 949746101 218,479 4,243,959 SH   SOLE   4,243,959 0 0
WEST PHARMACEUTICAL SVSC INC COM 955306105 2,122 24,534 SH   SOLE   24,534 0 0