The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it 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 |
| ALPHABET INC | CAP STK CL A | 02079K305 | 301,478 | 278,424 | SH | SOLE | 278,424 | 0 | 0 | ||
| ALPHABET INC | CAP STK CL C | 02079K107 | 808,556 | 748,033 | SH | SOLE | 748,033 | 0 | 0 | ||
| ALTABA INC | COM | 021346101 | 1,045 | 15,068 | SH | SOLE | 15,068 | 0 | 0 | ||
| AMAZON COM INC | COM | 023135106 | 411,480 | 217,297 | SH | SOLE | 217,297 | 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 | ||
| BERKSHIRE HATHAWAY INC DEL | CL B NEW | 084670702 | 292,540 | 1,372,332 | SH | SOLE | 1,372,332 | 0 | 0 | ||
| BERKSHIRE HATHAWAY INC DEL | CL A | 084670108 | 718,198 | 2,256 | SH | SOLE | 2,256 | 0 | 0 | ||
| BOOKING HLDGS INC | COM | 09857L108 | 330,748 | 176,426 | SH | SOLE | 176,426 | 0 | 0 | ||
| BUILDERS FIRSTSOURCE INC | COM | 12008R107 | 1,239 | 73,480 | SH | SOLE | 73,480 | 0 | 0 | ||
| CARMAX INC | COM | 143130102 | 861,357 | 9,920,039 | SH | SOLE | 9,920,039 | 0 | 0 | ||
| COCA COLA CO | COM | 191216100 | 1,165 | 22,888 | SH | SOLE | 22,888 | 0 | 0 | ||
| COSTCO WHSL CORP NEW | COM | 22160K105 | 655 | 2,479 | SH | SOLE | 2,479 | 0 | 0 | ||
| CREDIT ACCEP CORP MICH | COM | 225310101 | 525,702 | 1,086,543 | SH | SOLE | 1,086,543 | 0 | 0 | ||
| DENTSPLY SIRONA INC | COM | 24906P109 | 234 | 4,018 | SH | SOLE | 4,018 | 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 | 30303M102 | 407,709 | 2,112,481 | SH | SOLE | 2,112,481 | 0 | 0 | ||
| FIAT CHRYSLER AUTOMOBILES N | SHS | N31738102 | 527 | 38,165 | SH | SOLE | 38,165 | 0 | 0 | ||
| IDEXX LABS INC | COM | 45168D104 | 316 | 1,146 | SH | SOLE | 1,146 | 0 | 0 | ||
| JACOBS ENGR GROUP INC | COM | 469814107 | 495,817 | 5,875,311 | SH | SOLE | 5,875,311 | 0 | 0 | ||
| JD COM INC | SPON ADR CL A | 47215P106 | 403 | 13,319 | SH | SOLE | 13,319 | 0 | 0 | ||
| LIBERTY BROADBAND CORP | COM SER A | 530307107 | 106,062 | 1,031,326 | SH | SOLE | 1,031,326 | 0 | 0 | ||
| LIBERTY BROADBAND CORP | COM SER C | 530307305 | 327,173 | 3,139,251 | SH | SOLE | 3,139,251 | 0 | 0 | ||
| LIBERTY MEDIA CORP DELAWARE | COM SER C FRMLA | 531229854 | 459,074 | 12,271,419 | SH | SOLE | 12,271,419 | 0 | 0 | ||
| LIBERTY MEDIA CORP DELAWARE | COM SER A FRMLA | 531229870 | 13,366 | 372,740 | SH | SOLE | 372,740 | 0 | 0 | ||
| MASTERCARD INC | CL A | 57636Q104 | 533,534 | 2,016,913 | SH | SOLE | 2,016,913 | 0 | 0 | ||
| MOHAWK INDS INC | COM | 608190104 | 208,530 | 1,414,049 | SH | SOLE | 1,414,049 | 0 | 0 | ||
| PROCTER AND GAMBLE CO | COM | 742718109 | 1,203 | 10,971 | SH | SOLE | 10,971 | 0 | 0 | ||
| RIMINI STR INC DEL | COM | 76674Q107 | 57 | 10,779 | SH | SOLE | 10,779 | 0 | 0 | ||
| SAILPOINT TECHNLGIES HLDGS I | COM | 78781P105 | 281 | 14,000 | SH | SOLE | 14,000 | 0 | 0 | ||
| THE CHARLES SCHWAB CORPORATI | COM | 808513105 | 352,070 | 8,760,150 | SH | SOLE | 8,760,150 | 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 | COM CL A | 92826C839 | 251,215 | 1,447,506 | SH | SOLE | 1,447,506 | 0 | 0 | ||
| WAITR HLDGS INC | COM | 930752100 | 94 | 14,882 | SH | SOLE | 14,882 | 0 | 0 | ||
| WELLS FARGO CO NEW | COM | 949746101 | 232 | 4,899 | SH | SOLE | 4,899 | 0 | 0 | ||