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 46,657 224,000 SH   SOLE   224,000 0 0
AXALTA COATING SYS LTD COM G0750C108 24,733 813,575 SH   SOLE   813,575 0 0
ACCENTURE PLC IRELAND SHS CLASS A G1151C101 21,689 103,000 SH   SOLE   103,000 0 0
LIBERTY GLOBAL PLC SHS CL C G5480U120 79,059 3,627,400 SH   SOLE   3,627,400 0 0
LINDE PLC SHS G5494J103 34,703 163,000 SH   SOLE   163,000 0 0
MARVELL TECHNOLOGY GROUP LTD ORD G5876H105 19,033 716,600 SH   SOLE   716,600 0 0
LIBERTY LATIN AMERICA LTD COM CL C G9001E128 31,869 1,637,661 SH   SOLE   1,637,661 0 0
ACI WORLDWIDE INC COM 004498101 27,055 714,125 SH   SOLE   714,125 0 0
ALPHABET INC CAP STK CL C 02079K107 125,653 93,980 SH   SOLE   93,980 0 0
AMAZON COM INC COM 023135106 36,033 19,500 SH   SOLE   19,500 0 0
ANALOG DEVICES INC COM 032654105 31,790 267,500 SH   SOLE   267,500 0 0
APPLE INC COM 037833100 41 140 SH   SOLE   0 0 140
BERKSHIRE HATHAWAY INC DEL CL A 084670108 189,491 558 SH   SOLE   153 0 405
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 181,941 803,271 SH   SOLE   798,501 0 4,770
BLACK KNIGHT INC COM 09215C105 43,840 679,900 SH   SOLE   679,900 0 0
BOOKING HLDGS INC COM 09857L108 52,842 25,730 SH   SOLE   25,730 0 0
BOX INC CL A 10316T104 26,732 1,593,100 SH   SOLE   1,593,100 0 0
CARMAX INC COM 143130102 59,296 676,350 SH   SOLE   676,350 0 0
CHARTER COMMUNICATIONS INC N CL A 16119P108 2,910 6,000 SH   SOLE   6,000 0 0
COLFAX CORP COM 194014106 45,411 1,248,250 SH   SOLE   1,248,250 0 0
COMCAST CORP NEW CL A 20030N101 27,207 605,000 SH   SOLE   605,000 0 0
DXC TECHNOLOGY CO COM 23355L106 16,916 450,000 SH   SOLE   450,000 0 0
DANAHER CORPORATION COM 235851102 30,696 200,000 SH   SOLE   200,000 0 0
DIAGEO P L C SPON ADR NEW 25243Q205 21,474 127,500 SH   SOLE   127,500 0 0
DOLLAR TREE INC COM 256746108 18,810 200,000 SH   SOLE   200,000 0 0
EQUITY COMWLTH COM SH BEN INT 294628102 8,208 250,000 SH   SOLE   250,000 0 0
EXPEDIA GROUP INC COM NEW 30212P303 31,267 289,130 SH   SOLE   289,130 0 0
FACEBOOK INC CL A 30303M102 78,837 384,100 SH   SOLE   384,100 0 0
FIRST HAWAIIAN INC COM 32051X108 4,616 160,000 SH   SOLE   160,000 0 0
FORTUNE BRANDS HOME & SEC IN COM 34964C106 4,901 75,000 SH   SOLE   75,000 0 0
GCI LIBERTY INC COM CLASS A 36164V305 12,045 170,000 SH   SOLE   170,000 0 0
GARDNER DENVER HLDGS INC COM 36555P107 8,436 230,000 SH   SOLE   230,000 0 0
GUIDEWIRE SOFTWARE INC COM 40171V100 23,751 216,375 SH   SOLE   216,375 0 0
INTELLIGENT SYS CORP NEW COM 45816D100 75,123 1,880,905 SH   SOLE   1,880,905 0 0
ISHARES TR RUS 1000 ETF 464287622 294 1,648 SH   SOLE   0 0 1,648
JPMORGAN CHASE & CO COM 46625H100 33,944 243,500 SH   SOLE   243,500 0 0
LKQ CORP COM 501889208 24,629 689,900 SH   SOLE   689,900 0 0
LABORATORY CORP AMER HLDGS COM NEW 50540R409 91,762 542,425 SH   SOLE   542,425 0 0
LIBERTY BROADBAND CORP COM SER A 530307107 23,978 192,500 SH   SOLE   192,500 0 0
LIBERTY BROADBAND CORP COM SER C 530307305 136,426 1,084,900 SH   SOLE   1,084,900 0 0
LIBERTY MEDIA CORP DELAWARE COM A SIRIUSXM 531229409 19,094 395,000 SH   SOLE   395,000 0 0
LIBERTY MEDIA CORP DELAWARE COM C SIRIUSXM 531229607 79,347 1,648,250 SH   SOLE   1,648,250 0 0
LIBERTY MEDIA CORP DELAWARE COM A BRAVES GRP 531229706 326 11,000 SH   SOLE   11,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER C FRMLA 531229854 2,298 50,000 SH   SOLE   50,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER A FRMLA 531229870 1,204 27,500 SH   SOLE   27,500 0 0
LIBERTY MEDIA CORP DELAWARE COM C BRAVES GRP 531229888 3,102 105,000 SH   SOLE   105,000 0 0
MARKEL CORP COM 570535104 55,164 48,255 SH   SOLE   48,255 0 0
MARTIN MARIETTA MATLS INC COM 573284106 17,766 63,530 SH   SOLE   63,530 0 0
MASTERCARD INC CL A 57636Q104 88,477 296,315 SH   SOLE   296,315 0 0
MICROSOFT CORP COM 594918104 2,760 17,500 SH   SOLE   17,500 0 0
ORACLE CORP COM 68389X105 43,535 821,720 SH   SOLE   821,720 0 0
PERSPECTA INC COM 715347100 14,542 550,000 SH   SOLE   550,000 0 0
QURATE RETAIL INC COM SER A 74915M100 25,348 3,006,900 SH   SOLE   3,006,900 0 0
REDWOOD TR INC NOTE 4.750% 8/1 758075AC9 10,629 10,350,000 PRN   SOLE   10,350,000 0 0
REDWOOD TR INC NOTE 5.625% 7/1 758075AD7 7,149 7,000,000 PRN   SOLE   7,000,000 0 0
REDWOOD TR INC COM 758075402 53,763 3,250,500 SH   SOLE   3,250,500 0 0
SALESFORCE COM INC COM 79466L302 22,770 140,000 SH   SOLE   140,000 0 0
THE CHARLES SCHWAB CORPORATI COM 808513105 70,688 1,486,300 SH   SOLE   1,486,300 0 0
SUMMIT MATLS INC CL A 86614U100 41,169 1,722,550 SH   SOLE   1,722,550 0 0
TEXAS INSTRS INC COM 882508104 42,650 332,450 SH   SOLE   332,450 0 0
THERMO FISHER SCIENTIFIC INC COM 883556102 35,736 110,000 SH   SOLE   110,000 0 0
TRANSDIGM GROUP INC COM 893641100 15,879 28,355 SH   SOLE   28,355 0 0
VANGUARD BD INDEX FD INC INTERMED TERM 921937819 207 2,371 SH   SOLE   0 0 2,371
VANGUARD BD INDEX FD INC SHORT TRM BOND 921937827 378 4,692 SH   SOLE   0 0 4,692
VANGUARD TAX MANAGED INTL FD FTSE DEV MKT ETF 921943858 729 16,555 SH   SOLE   0 0 16,555
VANGUARD INDEX FDS TOTAL STK MKT 922908769 1,320 8,068 SH   SOLE   0 0 8,068
VISA INC COM CL A 92826C839 91,752 488,300 SH   SOLE   488,300 0 0
VULCAN MATLS CO COM 929160109 47,907 332,710 SH   SOLE   332,710 0 0