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 FIGI (to the nearest dollar) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
AON PLC SHS CL A G0403H108   45,843,166 145,400 SH   SOLE   145,400 0 0
AXALTA COATING SYS LTD COM G0750C108   4,948,689 163,377 SH   SOLE   163,377 0 0
ACCENTURE PLC IRELAND SHS CLASS A G1151C101   29,066,877 101,700 SH   SOLE   101,700 0 0
LIBERTY GLOBAL PLC SHS CL C G5480U120   30,783,990 1,510,500 SH   SOLE   1,510,500 0 0
LINDE PLC SHS G54950103   20,882,100 58,750 SH   SOLE   58,750 0 0
LIBERTY LATIN AMERICA LTD COM CL C G9001E128   12,070,338 1,461,300 SH   SOLE   1,461,300 0 0
ACI WORLDWIDE INC COM 004498101   4,891,636 181,306 SH   SOLE   181,306 0 0
ADOBE SYSTEMS INC COM 00724F101   25,049,050 65,000 SH   SOLE   65,000 0 0
ALPHABET INC CAP STK CL C 02079K107   118,618,240 1,140,560 SH   SOLE   1,140,560 0 0
AMAZON COM INC COM 023135106   41,316,000 400,000 SH   SOLE   400,000 0 0
ANALOG DEVICES INC COM 032654105   47,372,244 240,200 SH   SOLE   240,200 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702   115,310,157 373,450 SH   SOLE   373,450 0 0
BLACK KNIGHT INC COM 09215C105   18,016,280 313,000 SH   SOLE   313,000 0 0
CARMAX INC COM 143130102   51,166,687 795,997 SH   SOLE   795,997 0 0
CHARTER COMMUNICATIONS INC CL A 16119P108   1,788,050 5,000 SH   SOLE   5,000 0 0
COMCAST CORP NEW CL A 20030N101   2,448,986 64,600 SH   SOLE   64,600 0 0
COSTAR GROUP INC COM 22160N109   75,790,080 1,100,800 SH   SOLE   1,100,800 0 0
DANAHER CORPORATION COM 235851102   65,079,248 258,210 SH   SOLE   258,210 0 0
DIAGEO PLC SPON ADR NEW 25243Q205   2,663,346 14,700 SH   SOLE   14,700 0 0
DOLBY LABORATORIES INC COM CL A 25659T107   6,790,890 79,500 SH   SOLE   79,500 0 0
META PLATFORMS INC CL A 30303M102   89,608,232 422,800 SH   SOLE   422,800 0 0
FIDELITY NATL INFORMATION SV COM 31620M106   24,801,645 456,500 SH   SOLE   456,500 0 0
FORTIVE CORP COM 34959J108   2,781,336 40,800 SH   SOLE   40,800 0 0
GARTNER INC COM 366651107   45,702,273 140,290 SH   SOLE   140,290 0 0
GUIDEWIRE SOFTWARE INC COM 40171V100   17,763,825 216,500 SH   SOLE   216,500 0 0
HEICO CORP NEW CL A 422806208   24,937,650 183,500 SH   SOLE   183,500 0 0
HONEYWELL INTL INC COM 438516106   2,197,880 11,500 SH   SOLE   11,500 0 0
IDEX CORP COM 45167R104   15,502,113 67,100 SH   SOLE   67,100 0 0
INGERSOLL RAND INC COM 45687V106   4,654,400 80,000 SH   SOLE   80,000 0 0
CORECARD CORPORATION COM 45816D100   15,215,650 505,000 SH   SOLE   505,000 0 0
JPMORGAN CHASE & CO COM 46625H100   3,062,285 23,500 SH   SOLE   23,500 0 0
LKQ CORP COM 501889208   23,481,612 413,700 SH   SOLE   413,700 0 0
LABORATORY CORP AMER HLDGS COM NEW 50540R409   61,691,038 268,900 SH   SOLE   268,900 0 0
LIBERTY BROADBAND CORP COM SER A 530307107   15,602,800 190,000 SH   SOLE   190,000 0 0
LIBERTY BROADBAND CORP COM SER C 530307305   61,389,380 751,400 SH   SOLE   751,400 0 0
LIBERTY MEDIA CORP DEL COM A SIRIUSXM 531229409   8,707,900 310,000 SH   SOLE   310,000 0 0
LIBERTY MEDIA CORP DEL COM C SIRIUSXM 531229607   50,219,658 1,794,200 SH   SOLE   1,794,200 0 0
LIVE NATION ENTERTAINMENT INC COM 538034109   4,305,000 61,500 SH   SOLE   61,500 0 0
MARKEL CORP COM 570535104   42,141,756 32,990 SH   SOLE   32,990 0 0
MARTIN MARIETTA MATLS INC COM 573284106   23,629,243 66,550 SH   SOLE   66,550 0 0
MASTERCARD INCORPORATED CL A 57636Q104   77,787,911 214,050 SH   SOLE   214,050 0 0
MICROSOFT CORP COM 594918104   21,766,650 75,500 SH   SOLE   75,500 0 0
ORACLE CORP COM 68389X105   40,466,660 435,500 SH   SOLE   435,500 0 0
PERIMETER SOLUTIONS SA COM L7579L106   16,982,051 2,101,739 SH   SOLE   2,101,739 0 0
RWT HLDGS INC NOTE 5.750%10/0 749772AD1   3,176,174 3,500,000 PRN   SOLE   3,500,000 0 0
REDWOOD TR INC NOTE 4.750% 8/1 758075AC9   835,125 850,000 PRN   SOLE   850,000 0 0
REDWOOD TR INC NOTE 5.625% 7/1 758075AD7   8,557,003 9,000,000 PRN   SOLE   9,000,000 0 0
ROPER TECHNOLOGIES INC COM 776696106   40,675,687 92,300 SH   SOLE   92,300 0 0
S&P GLOBAL INC COM 78409V104   25,469,884 73,875 SH   SOLE   73,875 0 0
SALESFORCE COM INC COM 79466L302   27,969,200 140,000 SH   SOLE   120,000 0 0
TEXAS INSTRS INC COM 882508104   32,775,148 176,201 SH   SOLE   176,201 0 0
THERMO FISHER SCIENTIFIC INC COM 883556102   39,170,105 67,960 SH   SOLE   67,960 0 0
VISA INC COM CL A 92826C839   84,682,776 375,600 SH   SOLE   375,600 0 0
VULCAN MATLS CO COM 929160109   57,403,976 334,600 SH   SOLE   334,600 0 0