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
ALLERGAN PLC SHS G0177J108 96,244 505,270 SH   SOLE   499,370 0 5,900
AON PLC SHS CL A G0408V102 49,339 320,841 SH   SOLE   315,041 0 5,800
AXALTA COATING SYS LTD COM G0750C108 22,598 774,950 SH   SOLE   754,950 0 20,000
ACCENTURE PLC IRELAND SHS CLASS A G1151C101 17,739 104,224 SH   SOLE   104,224 0 0
LIBERTY GLOBAL PLC SHS CL C G5480U120 122,178 4,338,707 SH   SOLE   4,273,907 0 64,800
MARVELL TECHNOLOGY GROUP LTD ORD G5876H105 27,860 1,443,500 SH   SOLE   1,410,500 0 33,000
LIBERTY LATIN AMERICA LTD COM CL C G9001E128 32,137 1,557,800 SH   SOLE   1,525,200 0 32,600
ACI WORLDWIDE INC COM 004498101 10,553 375,000 SH   SOLE   375,000 0 0
ALPHABET INC CAP STK CL C 02079K107 113,982 95,505 SH   SOLE   94,305 0 1,200
ALPHABET INC CAP STK CL A 02079K305 177 147 SH   SOLE   147 0 0
AMAZON COM INC COM 023135106 16,216 8,096 SH   SOLE   8,096 0 0
ANHEUSER BUSCH INBEV SA/NV SPONSORED ADR 03524A108 1,489 17,000 SH   SOLE   17,000 0 0
APPLE INC COM 037833100 32 140 SH   SOLE   0 0 140
BERKSHIRE HATHAWAY INC DEL CL A 084670108 180,480 564 SH   SOLE   153 0 411
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 197,311 921,538 SH   SOLE   908,068 0 13,470
BOOKING HLDGS INC COM 09857L108 9,438 4,757 SH   SOLE   4,757 0 0
CARMAX INC COM 143130102 48,675 651,870 SH   SOLE   643,870 0 8,000
CHARTER COMMUNICATIONS INC N CL A 16119P108 10,428 32,000 SH   SOLE   32,000 0 0
COLFAX CORP COM 194014106 60,036 1,664,900 SH   SOLE   1,636,900 0 28,000
COMCAST CORP NEW CL A 20030N101 38,317 1,082,098 SH   SOLE   1,065,098 0 17,000
COMPASS MINERALS INTL INC COM 20451N101 9,610 143,000 SH   SOLE   143,000 0 0
DXC TECHNOLOGY CO COM 23355L106 51,142 546,852 SH   SOLE   537,852 0 9,000
DANAHER CORP DEL COM 235851102 12,613 116,077 SH   SOLE   116,077 0 0
DIAGEO P L C SPON ADR NEW 25243Q205 18,417 130,000 SH   SOLE   130,000 0 0
DISCOVERY INC COM SER C 25470F302 20,236 684,100 SH   SOLE   662,900 0 21,200
DOLLAR TREE INC COM 256746108 28,041 343,855 SH   SOLE   343,855 0 0
EQUITY COMWLTH COM SH BEN INT 294628102 8,023 250,000 SH   SOLE   250,000 0 0
FACEBOOK INC CL A 30303M102 62,625 380,793 SH   SOLE   375,193 0 5,600
FORTUNE BRANDS HOME & SEC IN COM 34964C106 2,618 50,000 SH   SOLE   50,000 0 0
GCI LIBERTY INC COM CLASS A 36164V305 19,635 385,000 SH   SOLE   385,000 0 0
GUIDEWIRE SOFTWARE INC COM 40171V100 7,071 70,000 SH   SOLE   70,000 0 0
INTELLIGENT SYS CORP NEW COM 45816D100 23,994 2,270,000 SH   SOLE   2,270,000 0 0
ISHARES TR RUS 1000 ETF 464287622 307 1,898 SH   SOLE   0 0 1,898
JPMORGAN CHASE & CO COM 46625H100 1,411 12,500 SH   SOLE   12,500 0 0
LABORATORY CORP AMER HLDGS COM NEW 50540R409 106,639 613,997 SH   SOLE   605,997 0 8,000
LIBERTY BROADBAND CORP COM SER A 530307107 28,672 340,000 SH   SOLE   340,000 0 0
LIBERTY BROADBAND CORP COM SER C 530307305 161,909 1,920,627 SH   SOLE   1,896,527 0 24,100
LIBERTY EXPEDIA HOLDINGS SER A COM 53046P109 10,584 225,000 SH   SOLE   225,000 0 0
LIBERTY MEDIA CORP DELAWARE COM A SIRIUSXM 531229409 16,073 370,000 SH   SOLE   370,000 0 0
LIBERTY MEDIA CORP DELAWARE COM C SIRIUSXM 531229607 62,351 1,435,005 SH   SOLE   1,410,505 0 24,500
LIBERTY MEDIA CORP DELAWARE COM A BRAVES GRP 531229706 846 31,000 SH   SOLE   31,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER C FRMLA 531229854 10,227 275,000 SH   SOLE   275,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER A FRMLA 531229870 2,757 77,500 SH   SOLE   77,500 0 0
LIBERTY MEDIA CORP DELAWARE COM C BRAVES GRP 531229888 6,676 245,000 SH   SOLE   245,000 0 0
LIONS GATE ENTMNT CORP CL A VTG 535919401 3,049 125,000 SH   SOLE   125,000 0 0
LIONS GATE ENTMNT CORP CL B NON VTG 535919500 3,495 150,000 SH   SOLE   150,000 0 0
MARKEL CORP COM 570535104 7,131 6,000 SH   SOLE   6,000 0 0
MARTIN MARIETTA MATLS INC COM 573284106 1,365 7,500 SH   SOLE   7,500 0 0
MASTERCARD INCORPORATED CL A 57636Q104 101,839 457,478 SH   SOLE   451,678 0 5,800
MICROSOFT CORP COM 594918104 1,716 15,000 SH   SOLE   15,000 0 0
MOHAWK INDS INC COM 608190104 17,198 98,080 SH   SOLE   98,080 0 0
MONDELEZ INTL INC CL A 609207105 1,289 30,000 SH   SOLE   30,000 0 0
MURPHY USA INC COM 626755102 2,564 30,000 SH   SOLE   30,000 0 0
ORACLE CORP COM 68389X105 64,461 1,250,213 SH   SOLE   1,230,313 0 19,900
PERSPECTA INC COM 715347100 9,902 385,000 SH   SOLE   385,000 0 0
PIONEER NAT RES CO COM 723787107 10,219 58,668 SH   SOLE   58,668 0 0
PRAXAIR INC COM 74005P104 27,638 171,950 SH   SOLE   171,950 0 0
QURATE RETAIL INC COM SER A 74915M100 39,073 1,759,250 SH   SOLE   1,722,250 0 37,000
RTW HLDGS INC NOTE 5.625%11/1 749772AB5 16,228 16,000,000 PRN   SOLE   16,000,000 0 0
REDWOOD TR INC NOTE 4.750% 8/1 758075AC9 14,391 15,000,000 PRN   SOLE   15,000,000 0 0
REDWOOD TR INC NOTE 5.625% 7/1 758075AD7 5,936 6,000,000 PRN   SOLE   6,000,000 0 0
REDWOOD TR INC COM 758075402 57,496 3,540,400 SH   SOLE   3,479,400 0 61,000
SPDR S&P 500 ETF TR TR UNIT 78462F103 52 180 SH   SOLE   0 0 180
SCHWAB CHARLES CORP NEW COM 808513105 41,244 839,139 SH   SOLE   825,639 0 13,500
SUMMIT MATLS INC CL A 86614U100 29,128 1,602,200 SH   SOLE   1,570,200 0 32,000
TEXAS INSTRS INC COM 882508104 41,228 384,270 SH   SOLE   376,070 0 8,200
THERMO FISHER SCIENTIFIC INC COM 883556102 28,295 115,924 SH   SOLE   115,924 0 0
TRANSDIGM GROUP INC COM 893641100 11,351 30,489 SH   SOLE   30,489 0 0
TUPPERWARE BRANDS CORP COM 899896104 14,885 445,000 SH   SOLE   445,000 0 0
TWENTY FIRST CENTY FOX INC CL A 90130A101 15,057 325,000 SH   SOLE   325,000 0 0
TWENTY FIRST CENTY FOX INC CL B 90130A200 266 5,808 SH   SOLE   5,808 0 0
VANGUARD BD INDEX FD INC INTERMED TERM 921937819 191 2,371 SH   SOLE   0 0 2,371
VANGUARD BD INDEX FD INC SHORT TRM BOND 921937827 366 4,692 SH   SOLE   0 0 4,692
VANGUARD TAX MANAGED INTL FD FTSE DEV MKT ETF 921943858 716 16,555 SH   SOLE   0 0 16,555
VANGUARD INDEX FDS TOTAL STK MKT 922908769 1,207 8,068 SH   SOLE   0 0 8,068
VISA INC COM CL A 92826C839 96,746 644,585 SH   SOLE   635,685 0 8,900
VULCAN MATLS CO COM 929160109 14,497 130,366 SH   SOLE   130,366 0 0
WELLS FARGO CO NEW COM 949746101 28,445 541,196 SH   SOLE   530,996 0 10,200
WESCO AIRCRAFT HLDGS INC COM 950814103 20,250 1,800,000 SH   SOLE   1,800,000 0 0