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
AON PLC SHS CL A G0408V102 41,230 213,000 SH   SOLE   213,000 0 0
AXALTA COATING SYS LTD COM G0750C108 24,529 813,575 SH   SOLE   813,575 0 0
ACCENTURE PLC IRELAND SHS CLASS A G1151C101 19,620 102,000 SH   SOLE   102,000 0 0
LIBERTY GLOBAL PLC SHS CL C G5480U120 87,485 3,677,400 SH   SOLE   3,677,400 0 0
LINDE PLC SHS G5494J103 31,576 163,000 SH   SOLE   163,000 0 0
MARVELL TECHNOLOGY GROUP LTD ORD G5876H105 17,894 716,600 SH   SOLE   716,600 0 0
LIBERTY LATIN AMERICA LTD COM CL C G9001E128 25,615 1,498,400 SH   SOLE   1,498,400 0 0
ACI WORLDWIDE INC COM 004498101 22,057 704,125 SH   SOLE   704,125 0 0
ALPHABET INC CAP STK CL C 02079K107 120,078 98,505 SH   SOLE   98,505 0 0
AMAZON COM INC COM 023135106 30,378 17,500 SH   SOLE   17,500 0 0
ANALOG DEVICES INC COM 032654105 28,491 255,000 SH   SOLE   255,000 0 0
APPLE INC COM 037833100 31 140 SH   SOLE   0 0 140
BERKSHIRE HATHAWAY INC DEL CL A 084670108 174,002 558 SH   SOLE   153 0 405
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 167,208 803,807 SH   SOLE   799,037 0 4,770
BLACK KNIGHT INC COM 09215C105 43,652 714,900 SH   SOLE   714,900 0 0
BOOKING HLDGS INC COM 09857L108 50,498 25,730 SH   SOLE   25,730 0 0
BOX INC CL A 10316T104 27,210 1,643,100 SH   SOLE   1,643,100 0 0
CARMAX INC COM 143130102 71,504 812,550 SH   SOLE   812,550 0 0
CHARTER COMMUNICATIONS INC N CL A 16119P108 2,473 6,000 SH   SOLE   6,000 0 0
COLFAX CORP COM 194014106 40,488 1,393,250 SH   SOLE   1,393,250 0 0
COMCAST CORP NEW CL A 20030N101 27,273 605,000 SH   SOLE   605,000 0 0
DXC TECHNOLOGY CO COM 23355L106 17,700 600,000 SH   SOLE   600,000 0 0
DANAHER CORPORATION COM 235851102 28,886 200,000 SH   SOLE   200,000 0 0
DIAGEO P L C SPON ADR NEW 25243Q205 20,849 127,500 SH   SOLE   127,500 0 0
DOLLAR TREE INC COM 256746108 28,540 250,000 SH   SOLE   250,000 0 0
EAGLE MATERIALS INC COM 26969P108 5,176 57,500 SH   SOLE   57,500 0 0
EQUITY COMWLTH COM SH BEN INT 294628102 8,563 250,000 SH   SOLE   250,000 0 0
EXPEDIA GROUP INC COM NEW 30212P303 7,258 54,000 SH   SOLE   54,000 0 0
FACEBOOK INC CL A 30303M102 71,784 403,100 SH   SOLE   403,100 0 0
FORTUNE BRANDS HOME & SEC IN COM 34964C106 4,103 75,000 SH   SOLE   75,000 0 0
GCI LIBERTY INC COM CLASS A 36164V305 22,190 357,500 SH   SOLE   357,500 0 0
GARDNER DENVER HLDGS INC COM 36555P107 6,507 230,000 SH   SOLE   230,000 0 0
GUIDEWIRE SOFTWARE INC COM 40171V100 25,173 238,875 SH   SOLE   238,875 0 0
INTELLIGENT SYS CORP NEW COM 45816D100 89,934 2,165,000 SH   SOLE   2,165,000 0 0
ISHARES TR RUS 1000 ETF 464287622 271 1,648 SH   SOLE   0 0 1,648
JPMORGAN CHASE & CO COM 46625H100 28,658 243,500 SH   SOLE   243,500 0 0
LKQ CORP COM 501889208 23,616 750,900 SH   SOLE   750,900 0 0
LABORATORY CORP AMER HLDGS COM NEW 50540R409 94,639 563,325 SH   SOLE   563,325 0 0
LIBERTY BROADBAND CORP COM SER A 530307107 20,120 192,500 SH   SOLE   192,500 0 0
LIBERTY BROADBAND CORP COM SER C 530307305 120,883 1,154,900 SH   SOLE   1,154,900 0 0
LIBERTY MEDIA CORP DELAWARE COM A SIRIUSXM 531229409 16,420 395,000 SH   SOLE   395,000 0 0
LIBERTY MEDIA CORP DELAWARE COM C SIRIUSXM 531229607 69,161 1,648,250 SH   SOLE   1,648,250 0 0
LIBERTY MEDIA CORP DELAWARE COM A BRAVES GRP 531229706 306 11,000 SH   SOLE   11,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER C FRMLA 531229854 2,080 50,000 SH   SOLE   50,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER A FRMLA 531229870 1,089 27,500 SH   SOLE   27,500 0 0
LIBERTY MEDIA CORP DELAWARE COM C BRAVES GRP 531229888 2,914 105,000 SH   SOLE   105,000 0 0
MARKEL CORP COM 570535104 23,638 20,000 SH   SOLE   20,000 0 0
MARTIN MARIETTA MATLS INC COM 573284106 17,414 63,530 SH   SOLE   63,530 0 0
MASTERCARD INC CL A 57636Q104 91,476 336,840 SH   SOLE   336,840 0 0
MICROSOFT CORP COM 594918104 2,433 17,500 SH   SOLE   17,500 0 0
MYERS INDS INC COM 628464109 3,728 211,200 SH   SOLE   211,200 0 0
ORACLE CORP COM 68389X105 45,219 821,720 SH   SOLE   821,720 0 0
PERSPECTA INC COM 715347100 13,844 530,000 SH   SOLE   530,000 0 0
QURATE RETAIL INC COM SER A 74915M100 30,366 2,943,848 SH   SOLE   2,943,848 0 0
RWT HLDGS INC NOTE 5.625%11/1 749772AB5 16,059 16,000,000 PRN   SOLE   16,000,000 0 0
REDWOOD TR INC NOTE 4.750% 8/1 758075AC9 10,340 10,350,000 PRN   SOLE   10,350,000 0 0
REDWOOD TR INC NOTE 5.625% 7/1 758075AD7 7,125 7,000,000 PRN   SOLE   7,000,000 0 0
REDWOOD TR INC COM 758075402 55,802 3,400,500 SH   SOLE   3,400,500 0 0
SPDR S&P 500 ETF TR TR UNIT 78462F103 53 180 SH   SOLE   0 0 180
SALESFORCE COM INC COM 79466L302 20,782 140,000 SH   SOLE   140,000 0 0
THE CHARLES SCHWAB CORPORATI COM 808513105 64,263 1,536,300 SH   SOLE   1,536,300 0 0
STANLEY BLACK & DECKER INC COM 854502101 14,123 97,795 SH   SOLE   97,795 0 0
SUMMIT MATLS INC CL A 86614U100 42,701 1,923,450 SH   SOLE   1,923,450 0 0
TEXAS INSTRS INC COM 882508104 43,935 339,950 SH   SOLE   339,950 0 0
THERMO FISHER SCIENTIFIC INC COM 883556102 32,040 110,000 SH   SOLE   110,000 0 0
TRANSDIGM GROUP INC COM 893641100 14,764 28,355 SH   SOLE   28,355 0 0
VANGUARD BD INDEX FD INC INTERMED TERM 921937819 209 2,371 SH   SOLE   0 0 2,371
VANGUARD BD INDEX FD INC SHORT TRM BOND 921937827 379 4,692 SH   SOLE   0 0 4,692
VANGUARD TAX MANAGED INTL FD FTSE DEV MKT ETF 921943858 680 16,555 SH   SOLE   0 0 16,555
VANGUARD INDEX FDS TOTAL STK MKT 922908769 1,218 8,068 SH   SOLE   0 0 8,068
VISA INC COM CL A 92826C839 91,430 531,540 SH   SOLE   531,540 0 0
VULCAN MATLS CO COM 929160109 47,446 313,710 SH   SOLE   313,710 0 0