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
ALIBABA GROUP HLDG LTD SPONSORED ADS 01609W102 795 3,505 SH   SOLE   3,505 0 0
ALPHABET INC CAP STK CL C 02079K107 442,432 213,877 SH   SOLE   213,877 0 0
ALPHABET INC CAP STK CL A 02079K305 436,260 211,518 SH   SOLE   211,518 0 0
AMAZON COM INC COM 023135106 2,095 677 SH   SOLE   677 0 0
ANGI INC COM CL A NEW 00183L102 156 11,972 SH   SOLE   11,972 0 0
ANTHEM INC COM 036752103 420,634 1,171,845 SH   SOLE   1,171,845 0 0
ARISTA NETWORKS INC COM 040413106 433,448 1,435,782 SH   SOLE   1,435,782 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 158,723 621,299 SH   SOLE   621,299 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 310,876 806 SH   SOLE   806 0 0
BUILDERS FIRSTSOURCE INC COM 12008R107 3,317 71,523 SH   SOLE   71,523 0 0
CARMAX INC COM 143130102 903,856 6,813,324 SH   SOLE   6,813,324 0 0
CREDIT ACCEP CORP MICH COM 225310101 583,852 1,620,775 SH   SOLE   1,620,775 0 0
DISNEY WALT CO COM 254687106 502,736 2,724,559 SH   SOLE   2,724,559 0 0
EQUITABLE HLDGS INC COM 29452E101 1,020 31,259 SH   SOLE   31,259 0 0
EXPEDITORS INTL WASH INC COM 302130109 10,999 102,132 SH   SOLE   102,132 0 0
FACEBOOK INC CL A 30303M102 741,278 2,516,818 SH   SOLE   2,516,818 0 0
FIDELITY NATL INFORMATION SV COM 31620M106 269,307 1,915,276 SH   SOLE   1,915,276 0 0
GTT COMMUNICATIONS INC COM 362393100 44 24,100 SH   SOLE   24,100 0 0
INTERCONTINENTAL EXCHANGE IN COM 45866F104 382,407 3,424,133 SH   SOLE   3,424,133 0 0
INTERNATIONAL MNY EXPRESS IN COM 46005L101 169 11,262 SH   SOLE   11,262 0 0
JACOBS ENGR GROUP INC COM 469814107 502,898 3,890,293 SH   SOLE   3,890,293 0 0
LIBERTY BROADBAND CORP COM SER C 530307305 422,313 2,812,608 SH   SOLE   2,812,608 0 0
LIBERTY BROADBAND CORP COM SER A 530307107 138,405 953,528 SH   SOLE   953,528 0 0
LIBERTY MEDIA CORP DEL COM SER A FRMLA 531229870 12,585 329,268 SH   SOLE   329,268 0 0
LIBERTY MEDIA CORP DEL COM SER C FRMLA 531229854 452,151 10,444,692 SH   SOLE   10,444,692 0 0
MASTERCARD INCORPORATED CL A 57636Q104 179,343 503,701 SH   SOLE   503,701 0 0
MICRON TECHNOLOGY INC COM 595112103 469,731 5,325,143 SH   SOLE   5,325,143 0 0
MOHAWK INDS INC COM 608190104 2,083 10,833 SH   SOLE   10,833 0 0
NETFLIX INC COM 64110L106 362,089 694,109 SH   SOLE   694,109 0 0
PRIMERICA INC COM 74164M108 207 1,400 SH   SOLE   1,400 0 0
SCHWAB CHARLES CORP COM 808513105 595,629 9,138,218 SH   SOLE   9,138,218 0 0
SINCLAIR BROADCAST GROUP INC CL A 829226109 609 20,802 SH   SOLE   20,802 0 0
STELLANTIS N.V SHS N82405106 858 48,219 SH   SOLE   48,219 0 0
TAIWAN SEMICONDUCTOR MFG LTD SPONSORED ADS 874039100 700,294 5,920,645 SH   SOLE   5,920,645 0 0
UNITEDHEALTH GROUP INC COM 91324P102 699,175 1,879,149 SH   SOLE   1,879,149 0 0
VISA INC COM CL A 92826C839 77,046 363,886 SH   SOLE   363,886 0 0
WAYFAIR INC CL A 94419L101 415,166 1,319,033 SH   SOLE   1,319,033 0 0