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 FIGI (to the nearest dollar) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
AerCap Holdings COM n00985106   55,732,141 889,295 SH   SOLE   889,295 0 0
Alphabet COM 38259p706   101,620,017 770,724 SH   SOLE   770,724 0 0
Alphabet Class A COM 38259p508   534,171 4,082 SH   SOLE   4,082 0 0
Amazon Com COM 023135106   320,342 2,520 SH   SOLE   2,520 0 0
Amgen COM 031162100   999,787 3,720 SH   SOLE   3,720 0 0
Apple COM 037833100   5,830,557 34,055 SH   SOLE   34,055 0 0
Bank of America COM 060505104   4,327,530 158,054 SH   SOLE   158,054 0 0
Berkshire Hathaway 'A' COM 084670108   21,259,080 40 SH   SOLE   40 0 0
Berkshire Hathaway COM 084670702   481,557,782 1,374,701 SH   SOLE   1,374,701 0 0
Berkshire Hathaway COM 084670702   293,936,730 839,100 SH Call SOLE   839,100 0 0
Berkshire Hathaway COM 084670702   140,470,300 401,000 SH Call SOLE   401,000 0 0
Berkshire Hathaway COM 084670702   3,432,940 9,800 SH Call SOLE   9,800 0 0
Berkshire Hathaway COM 084670702   133,008,910 379,700 SH Call SOLE   379,700 0 0
Berkshire Hathaway COM 084670702   421,726,170 1,203,900 SH Call SOLE   1,203,900 0 0
Berkshire Hathaway COM 084670702   65,681,250 187,500 SH Call SOLE   187,500 0 0
Berkshire Hathaway COM 084670702   12,575,770 35,900 SH Call SOLE   35,900 0 0
Berkshire Hathaway COM 084670702   135,566,100 387,000 SH Call SOLE   387,000 0 0
Berkshire Hathaway COM 084670702   12,120,380 34,600 SH Call SOLE   34,600 0 0
Berkshire Hathaway COM 084670702   57,624,350 164,500 SH Call SOLE   164,500 0 0
Berkshire Hathaway COM 084670702   50,898,590 145,300 SH Call SOLE   145,300 0 0
Berkshire Hathaway COM 084670702   4,028,450 11,500 SH Call SOLE   11,500 0 0
Berkshire Hathaway COM 084670702   7,006,000 20,000 SH Call SOLE   20,000 0 0
Berkshire Hathaway COM 084670702   9,493,130 27,100 SH Call SOLE   27,100 0 0
Berkshire Hathaway COM 084670702   35,030 100 SH Call SOLE   100 0 0
Berkshire Hathaway COM 084670702   24,801,240 70,800 SH Call SOLE   70,800 0 0
Berkshire Hathaway COM 084670702   11,174,570 31,900 SH Call SOLE   31,900 0 0
Berkshire Hathaway COM 084670702   13,801,820 39,400 SH Call SOLE   39,400 0 0
Berkshire Hathaway COM 084670702   1,541,320 4,400 SH Call SOLE   4,400 0 0
Berkshire Hathaway COM 084670702   2,206,890 6,300 SH Call SOLE   6,300 0 0
Berkshire Hathaway COM 084670702   245,210 700 SH Call SOLE   700 0 0
Berkshire Hathaway COM 084670702   14,607,510 41,700 SH Call SOLE   41,700 0 0
Berkshire Hathaway COM 084670702   840,720 2,400 SH Call SOLE   2,400 0 0
Biglari Cl A COM 08986r408   1,875,405 2,359 SH   SOLE   2,359 0 0
Brookfield Asset Management COM 113004105   1,871,107 56,122 SH   SOLE   56,122 0 0
Brookfield Corp. COM 11271J107   95,008,532 3,038,329 SH   SOLE   3,038,329 0 0
CarMax COM 143130102   43,432,397 614,059 SH   SOLE   614,059 0 0
Cardlytics COM 14161W105   335,775 20,350 SH   SOLE   20,350 0 0
Caterpillar Tractor COM 149123101   468,741 1,717 SH   SOLE   1,717 0 0
Chevron COM 166764100   284,462 1,687 SH   SOLE   1,687 0 0
Cimpress COM 045290255   25,650,667 366,386 SH   SOLE   366,386 0 0
Conocophillips COM 20825c104   407,799 3,404 SH   SOLE   3,404 0 0
Disney (Walt) COM 254687106   2,872,331 35,439 SH   SOLE   35,439 0 0
Fastenal COM 311900104   281,942 5,160 SH   SOLE   5,160 0 0
FedEx COM 31428x106   50,817,703 191,823 SH   SOLE   191,823 0 0
First Citizens COM 31946M103   27,324,690 19,799 SH   SOLE   19,799 0 0
General Electric COM 369604103   367,800 3,327 SH   SOLE   3,327 0 0
Goldman Sachs COM 38141g104   397,991 1,230 SH   SOLE   1,230 0 0
Illinois Tool Works COM 452308109   253,341 1,100 SH   SOLE   1,100 0 0
Karat Packaging Inc COM 48563L101   461,200 20,000 SH   SOLE   20,000 0 0
LKQ Corp COM 501889208   58,779,822 1,187,231 SH   SOLE   1,187,231 0 0
Markel COM 570535104   106,579,810 72,381 SH   SOLE   72,381 0 0
Matson Inc. COM 57686G105   315,400 3,555 SH   SOLE   3,555 0 0
Metro Bank Holdings COM G60643106   30,294 42,500 SH   SOLE   42,500 0 0
Microsoft COM 594918104   1,853,137 5,869 SH   SOLE   5,869 0 0
Quest Diagnostics COM 74834l100   20,439,607 167,730 SH   SOLE   167,730 0 0
Raytheon Technologies COM 75513E101   251,103 3,489 SH   SOLE   3,489 0 0
Sempra Energy COM 816851109   258,423 3,799 SH   SOLE   3,799 0 0
Suncor COM 867224107   61,341,166 1,784,211 SH   SOLE   1,784,211 0 0
Tesla Motors COM 88160r101   620,796 2,481 SH   SOLE   2,481 0 0
Thermo Fisher COM 883556102   218,665 432 SH   SOLE   432 0 0
Trupanion Inc. COM 898202106   646,485 22,925 SH   SOLE   22,925 0 0
Tyson Foods COM 902494103   204,484 4,050 SH   SOLE   4,050 0 0
Uber COM 90353T100   266,742 5,800 SH   SOLE   5,800 0 0
Verizon COM 92343v104   294,153 9,076 SH   SOLE   9,076 0 0
Wayfair COM 94419l101   9,556,796 157,781 SH   SOLE   157,781 0 0
Wells Fargo COM 949746101   407,347 9,969 SH   SOLE   9,969 0 0
IShares Exponential Technologi ETF 46434V381   438,564 8,400 SH   SOLE   8,400 0 0
SPDR S&P 500 ETF 78462f103   348,824 816 SH   SOLE   816 0 0