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 1COLUMN 2COLUMN 3COLUMN 4COLUMN 5COLUMN 6COLUMN 7COLUMN 8
VALUESHRS ORSH/PUT/INVESTMENTOTHERVOTING AUTHORITY
NAME OF ISSUERTITLE OF CLASSCUSIP(x$1000)PRN AMTPRNCALLDISCRETIONMANAGERSOLESHAREDNONE
ALPHABET INCCAP STK CL C02079K107382,719218,462SH SOLE 218,46200
ALPHABET INCCAP STK CL A02079K305377,831215,578SH SOLE 215,57800
AMAZON COM INCCOM0231351062,231685SH SOLE 68500
AMERICAN ELEC PWR CO INCCOM0255371013143,766SH SOLE 3,76600
ANGI HOMESERVICES INCCOM CL A00183L10215811,972SH SOLE 11,97200
ARISTA NETWORKS INCCOM040413106562,7551,936,727SH SOLE 1,936,72700
BERKSHIRE HATHAWAY INC DELCL B NEW084670702243,1211,048,522SH SOLE 1,048,52200
BERKSHIRE HATHAWAY INC DELCL A084670108346,076995SH SOLE 99500
BUILDERS FIRSTSOURCE INCCOM12008R1073,18778,084SH SOLE 78,08400
CARMAX INCCOM143130102618,6186,548,997SH SOLE 6,548,99700
COCA COLA COCOM1912161003055,559SH SOLE 5,55900
CREDIT ACCEP CORP MICHCOM225310101554,6961,602,519SH SOLE 1,602,51900
DISNEY WALT COCOM254687106501,4572,767,727SH SOLE 2,767,72700
EDISON INTLCOM2810201072133,385SH SOLE 3,38500
EXPEDITORS INTL WASH INCCOM3021301099,714102,132SH SOLE 102,13200
Equitable Holdings IncCOM29452E10138014,861SH SOLE 14,86100
Facebook Inc Cl ACL A30303M102606,3872,219,897SH SOLE 2,219,89700
Fiat Chrysler Automobiles NV sSHSN3173810275941,951SH SOLE 41,95100
Fidelity Natl Info Svcs IncCOM31620M106275,0211,944,162SH SOLE 1,944,16200
GTT COMMUNICATIONS INCCOM3623931008624,100SH SOLE 24,10000
Intercontinental Exchange Inc.COM45866F104400,0093,469,593SH SOLE 3,469,59300
JACOBS ENGR GROUP INCCOM469814107434,0583,983,647SH SOLE 3,983,64700
LIBERTY BROADBAND CORPCOM SER A530307107152,095965,195SH SOLE 965,19500
LIBERTY BROADBAND CORPCOM SER C530307305330,8132,088,860SH SOLE 2,088,86000
LIBERTY MEDIA CORP DELCOM SER C FRMLA531229854450,11410,566,059SH SOLE 10,566,05900
LIBERTY MEDIA CORP DELCOM SER A FRMLA53122987012,780336,401SH SOLE 336,40100
MASTERCARD INCORPORATEDCL A57636Q104342,580959,770SH SOLE 959,77000
MOHAWK INDS INCCOM6081901041,52710,833SH SOLE 10,83300
Netflix Com IncCOM64110L106379,254701,374SH SOLE 701,37400
PROCTER AND GAMBLE COCOM7427181094523,246SH SOLE 3,24600
PROGRESSIVE CORPCOM7433151032052,076SH SOLE 2,07600
SCHWAB CHARLES CORPCOM808513105495,1009,334,460SH SOLE 9,334,46000
SINCLAIR BROADCAST GROUP INCCL A82922610967921,317SH SOLE 21,31700
TAIWAN SEMICONDUCTOR MFG LTDSPONSORED ADS874039100729,4646,689,879SH SOLE 6,689,87900
UNION PAC CORPCOM9078181084282,057SH SOLE 2,05700
Unitedhealth Group IncCOM91324P102644,4161,837,617SH SOLE 1,837,61700
VISA INCCOM CL A92826C839113,927520,855SH SOLE 520,85500
WAYFAIR INCCL A94419L101404,8341,792,809SH SOLE 1,792,80900