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 51,223 383,236 SH   SOLE   377,736 0 5,500
AON PLC SHS CL A G0408V102 38,796 266,899 SH   SOLE   261,899 0 5,000
AXALTA COATING SYS LTD COM G0750C108 19,127 816,675 SH   SOLE   794,175 0 22,500
ACCENTURE PLC IRELAND SHS CLASS A G1151C101 14,646 103,864 SH   SOLE   103,864 0 0
LIBERTY GLOBAL PLC SHS CL C G5480U120 84,547 4,096,255 SH   SOLE   4,041,755 0 54,500
LINDE PLC COM G5494J103 26,742 171,376 SH   SOLE   171,376 0 0
MARVELL TECHNOLOGY GROUP LTD ORD G5876H105 26,616 1,644,000 SH   SOLE   1,611,000 0 33,000
LIBERTY LATIN AMERICA LTD COM CL C G9001E128 22,697 1,557,800 SH   SOLE   1,525,200 0 32,600
ACI WORLDWIDE INC COM 004498101 8,993 325,000 SH   SOLE   325,000 0 0
ALPHABET INC CAP STK CL C 02079K107 103,193 99,645 SH   SOLE   98,365 0 1,280
AMAZON COM INC COM 023135106 20,753 13,817 SH   SOLE   13,817 0 0
ANALOG DEVICES INC COM 032654105 20,756 241,825 SH   SOLE   241,825 0 0
ANHEUSER BUSCH INBEV SA/NV SPONSORED ADR 03524A108 1,316 20,000 SH   SOLE   20,000 0 0
APPLE INC COM 037833100 22 140 SH   SOLE   0 0 140
BERKSHIRE HATHAWAY INC DEL CL A 084670108 170,748 558 SH   SOLE   153 0 405
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 175,272 858,421 SH   SOLE   845,751 0 12,670
BLACK KNIGHT INC COM 09215C105 31,637 702,100 SH   SOLE   688,500 0 13,600
BOOKING HLDGS INC COM 09857L108 13,900 8,070 SH   SOLE   8,070 0 0
CARMAX INC COM 143130102 54,680 871,674 SH   SOLE   859,874 0 11,800
CHARTER COMMUNICATIONS INC N CL A 16119P108 2,565 9,000 SH   SOLE   9,000 0 0
COLFAX CORP COM 194014106 38,110 1,823,450 SH   SOLE   1,790,950 0 32,500
COMCAST CORP NEW CL A 20030N101 36,262 1,064,955 SH   SOLE   1,047,955 0 17,000
COMPASS MINERALS INTL INC COM 20451N101 6,462 155,000 SH   SOLE   155,000 0 0
DXC TECHNOLOGY CO COM 23355L106 35,725 671,900 SH   SOLE   658,700 0 13,200
DANAHER CORP DEL COM 235851102 17,654 171,200 SH   SOLE   171,200 0 0
DIAGEO P L C SPON ADR NEW 25243Q205 18,434 130,000 SH   SOLE   130,000 0 0
DISCOVERY INC COM SER C 25470F302 4,616 200,000 SH   SOLE   200,000 0 0
DOLLAR TREE INC COM 256746108 30,953 342,700 SH   SOLE   342,700 0 0
DOWDUPONT INC COM 26078J100 6 117 SH   SOLE   0 0 117
EQUITY COMWLTH COM SH BEN INT 294628102 7,503 250,000 SH   SOLE   250,000 0 0
FACEBOOK INC CL A 30303M102 61,076 465,907 SH   SOLE   460,107 0 5,800
FORTUNE BRANDS HOME & SEC IN COM 34964C106 2,849 75,000 SH   SOLE   75,000 0 0
GCI LIBERTY INC COM CLASS A 36164V305 15,847 385,000 SH   SOLE   385,000 0 0
GARDNER DENVER HLDGS INC COM 36555P107 4,090 200,000 SH   SOLE   200,000 0 0
GUIDEWIRE SOFTWARE INC COM 40171V100 8,825 110,000 SH   SOLE   110,000 0 0
INTELLIGENT SYS CORP NEW COM 45816D100 29,328 2,270,000 SH   SOLE   2,270,000 0 0
ISHARES TR RUS 1000 ETF 464287622 263 1,898 SH   SOLE   0 0 1,898
JPMORGAN CHASE & CO COM 46625H100 1,464 15,000 SH   SOLE   15,000 0 0
LABORATORY CORP AMER HLDGS COM NEW 50540R409 87,103 689,325 SH   SOLE   680,725 0 8,600
LIBERTY BROADBAND CORP COM SER A 530307107 21,902 305,000 SH   SOLE   305,000 0 0
LIBERTY BROADBAND CORP COM SER C 530307305 133,362 1,851,476 SH   SOLE   1,829,876 0 21,600
LIBERTY EXPEDIA HOLDINGS SER A COM 53046P109 4,889 125,000 SH   SOLE   125,000 0 0
LIBERTY MEDIA CORP DELAWARE COM A SIRIUSXM 531229409 14,536 395,000 SH   SOLE   395,000 0 0
LIBERTY MEDIA CORP DELAWARE COM C SIRIUSXM 531229607 53,638 1,450,447 SH   SOLE   1,423,947 0 26,500
LIBERTY MEDIA CORP DELAWARE COM A BRAVES GRP 531229706 773 31,000 SH   SOLE   31,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER C FRMLA 531229854 8,443 275,000 SH   SOLE   275,000 0 0
LIBERTY MEDIA CORP DELAWARE COM SER A FRMLA 531229870 2,303 77,500 SH   SOLE   77,500 0 0
LIBERTY MEDIA CORP DELAWARE COM C BRAVES GRP 531229888 6,098 245,000 SH   SOLE   245,000 0 0
LIONS GATE ENTMNT CORP CL A VTG 535919401 2,013 125,000 SH   SOLE   125,000 0 0
LIONS GATE ENTMNT CORP CL B NON VTG 535919500 2,232 150,000 SH   SOLE   150,000 0 0
MARKEL CORP COM 570535104 10,381 10,000 SH   SOLE   10,000 0 0
MARTIN MARIETTA MATLS INC COM 573284106 11,538 67,130 SH   SOLE   64,630 0 2,500
MASTERCARD INCORPORATED CL A 57636Q104 85,298 452,151 SH   SOLE   446,151 0 6,000
MICROSOFT CORP COM 594918104 1,524 15,000 SH   SOLE   15,000 0 0
MOHAWK INDS INC COM 608190104 15,915 136,075 SH   SOLE   136,075 0 0
MONDELEZ INTL INC CL A 609207105 1,201 30,000 SH   SOLE   30,000 0 0
MURPHY USA INC COM 626755102 3,066 40,000 SH   SOLE   40,000 0 0
MYERS INDS INC COM 628464109 2,115 140,000 SH   SOLE   140,000 0 0
ORACLE CORP COM 68389X105 56,313 1,247,237 SH   SOLE   1,227,337 0 19,900
PERSPECTA INC COM 715347100 8,266 480,000 SH   SOLE   480,000 0 0
QURATE RETAIL INC COM SER A 74915M100 32,324 1,655,950 SH   SOLE   1,621,950 0 34,000
RTW HLDGS INC NOTE 5.625%11/1 749772AB5 16,110 16,000,000 PRN   SOLE   16,000,000 0 0
REDWOOD TR INC NOTE 4.750% 8/1 758075AC9 13,781 15,000,000 PRN   SOLE   15,000,000 0 0
REDWOOD TR INC NOTE 5.625% 7/1 758075AD7 5,647 6,000,000 PRN   SOLE   6,000,000 0 0
REDWOOD TR INC COM 758075402 42,442 2,816,300 SH   SOLE   2,758,300 0 58,000
SPDR S&P 500 ETF TR TR UNIT 78462F103 45 180 SH   SOLE   0 0 180
SCHWAB CHARLES CORP NEW COM 808513105 54,918 1,322,364 SH   SOLE   1,304,864 0 17,500
STANLEY BLACK & DECKER INC COM 854502101 14,201 118,595 SH   SOLE   113,995 0 4,600
SUMMIT MATLS INC CL A 86614U100 29,355 2,367,300 SH   SOLE   2,326,300 0 41,000
TEXAS INSTRS INC COM 882508104 37,583 397,700 SH   SOLE   388,400 0 9,300
THERMO FISHER SCIENTIFIC INC COM 883556102 23,693 105,873 SH   SOLE   105,873 0 0
TRANSDIGM GROUP INC COM 893641100 26,202 77,052 SH   SOLE   75,437 0 1,615
TUPPERWARE BRANDS CORP COM 899896104 4,736 150,000 SH   SOLE   150,000 0 0
TWENTY FIRST CENTY FOX INC CL A 90130A101 13,955 290,000 SH   SOLE   290,000 0 0
TWENTY FIRST CENTY FOX INC CL B 90130A200 188 3,934 SH   SOLE   3,934 0 0
VANGUARD BD INDEX FD INC INTERMED TERM 921937819 193 2,371 SH   SOLE   0 0 2,371
VANGUARD BD INDEX FD INC SHORT TRM BOND 921937827 369 4,692 SH   SOLE   0 0 4,692
VANGUARD TAX MANAGED INTL FD FTSE DEV MKT ETF 921943858 614 16,555 SH   SOLE   0 0 16,555
VANGUARD INDEX FDS TOTAL STK MKT 922908769 1,030 8,068 SH   SOLE   0 0 8,068
VISA INC COM CL A 92826C839 83,679 634,219 SH   SOLE   624,919 0 9,300
VULCAN MATLS CO COM 929160109 27,026 273,540 SH   SOLE   269,040 0 4,500
WESCO AIRCRAFT HLDGS INC COM 950814103 13,430 1,700,000 SH   SOLE   1,700,000 0 0