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

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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
Alibaba Group Sh ADR SPONSORED ADS 01609W102 498,480 2,941,754 SH   SOLE   2,941,754 0 0
Alphabet Inc Cl A CAP STK CL A 02079K305 888,055 820,147 SH   SOLE   820,147 0 0
Alphabet Inc. Cl C CAP STK CL C 02079K107 810,040 749,406 SH   SOLE   749,406 0 0
ALTABA INC COM 021346101 1,045 15,068 SH   SOLE   15,068 0 0
AMAZON COM INC COM 023135106 554,230 292,681 SH   SOLE   292,681 0 0
AMERICAN ELEC PWR CO INC COM 025537101 1,152 13,090 SH   SOLE   13,090 0 0
ARISTA NETWORKS INC COM 040413106 935 3,600 SH   SOLE   3,600 0 0
AXA EQUITABLE HLDGS INC COM 054561105 37,620 1,800,000 SH   SOLE   1,800,000 0 0
BAIDU INC SPON ADR REP A 056752108 23,472 200,000 SH   SOLE   200,000 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 718,516 2,257 SH   SOLE   2,257 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 293,363 1,376,193 SH   SOLE   1,376,193 0 0
BMC Stock Holdings Inc. COM 05591B109 84,800 4,000,000 SH   SOLE   4,000,000 0 0
Booking Holdings Inc COM 09857L108 331,301 176,721 SH   SOLE   176,721 0 0
Builders Firstsource Inc. COM 12008R107 146,235 8,673,480 SH   SOLE   8,673,480 0 0
CARGURUS INC COM CL A 141788109 21,847 605,000 SH   SOLE   605,000 0 0
CARMAX INC COM 143130102 862,799 9,936,651 SH   SOLE   9,936,651 0 0
COCA COLA CO COM 191216100 1,165 22,888 SH   SOLE   22,888 0 0
Costco Wholesale Corp COM 22160K105 655 2,479 SH   SOLE   2,479 0 0
CREDIT ACCEP CORP MICH COM 225310101 526,559 1,088,314 SH   SOLE   1,088,314 0 0
CRESUD S A C I F Y A SPONSORED ADR 226406106 6,743 643,373 SH   SOLE   643,373 0 0
Dentsply Sirona Inc. COM 24906P109 234 4,018 SH   SOLE   4,018 0 0
DOMO INC COM CL B 257554105 20,490 750,000 SH   SOLE   750,000 0 0
EDISON INTL COM 281020107 1,277 18,939 SH   SOLE   18,939 0 0
EXPEDITORS INTL WASH INC COM 302130109 7,748 102,132 SH   SOLE   102,132 0 0
Facebook Inc Cl A CL A 30303M102 408,355 2,115,831 SH   SOLE   2,115,831 0 0
Fiat Chrysler Automobiles NV s SHS N31738102 387,487 28,038,165 SH   SOLE   28,038,165 0 0
GTT COMMUNICATIONS INC COM 362393100 31,909 1,813,008 SH   SOLE   1,813,008 0 0
GTY TECHNOLOGY HOLDINGS INC COM 362409104 27,400 4,000,000 SH   SOLE   4,000,000 0 0
Idexx Laboratories Corp. COM 45168D104 316 1,146 SH   SOLE   1,146 0 0
Iqiyi Inc ADR SPONSORED ADS 46267X108 14,723 713,000 SH   SOLE   713,000 0 0
JACOBS ENGR GROUP INC COM 469814107 547,281 6,485,142 SH   SOLE   6,485,142 0 0
JD.com SPON ADR CL A 47215P106 241,209 7,963,319 SH   SOLE   7,963,319 0 0
LIBERTY BROADBAND CORP COM SER A 530307107 106,182 1,032,500 SH   SOLE   1,032,500 0 0
LIBERTY BROADBAND CORP COM SER C 530307305 327,776 3,145,043 SH   SOLE   3,145,043 0 0
LIBERTY MEDIA CORP DELAWARE COM SER A FRMLA 531229870 13,631 380,117 SH   SOLE   380,117 0 0
LIBERTY MEDIA CORP DELAWARE COM SER C FRMLA 531229854 459,594 12,285,321 SH   SOLE   12,285,321 0 0
Mastercard Inc CL A 57636Q104 534,902 2,022,084 SH   SOLE   2,022,084 0 0
MOHAWK INDS INC COM 608190104 208,876 1,416,399 SH   SOLE   1,416,399 0 0
PROCTER AND GAMBLE CO COM 742718109 1,203 10,971 SH   SOLE   10,971 0 0
RH Com COM 74967X103 28,900 250,000 SH   SOLE   250,000 0 0
Rimini Street Inc. COM 76674Q107 57 10,779 SH   SOLE   10,779 0 0
Sailpoint Technologies Holding COM 78781P105 80,441 4,014,000 SH   SOLE   4,014,000 0 0
THE CHARLES SCHWAB CORPORATI COM 808513105 352,667 8,774,987 SH   SOLE   8,774,987 0 0
SINCLAIR BROADCAST GROUP INC CL A 829226109 113,696 2,120,000 SH   SOLE   2,120,000 0 0
TJX COS INC NEW COM 872540109 918 17,364 SH   SOLE   17,364 0 0
UNION PACIFIC CORP COM 907818108 1,138 6,731 SH   SOLE   6,731 0 0
Visa Inc Class A COM CL A 92826C839 251,625 1,449,868 SH   SOLE   1,449,868 0 0
WAITR HLDGS INC COM 930752100 18,964 3,014,882 SH   SOLE   3,014,882 0 0
Wayfair Inc Cl A CL A 94419L101 73,051 500,348 SH   SOLE   500,348 0 0
WELLS FARGO CO NEW COM 949746101 232 4,899 SH   SOLE   4,899 0 0
Yandex NV Shs SHS CLASS A N97284108 103,740 2,730,000 SH   SOLE   2,730,000 0 0