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
ABBVIE INC COM 00287Y109 BBG0025Y4RY4 266,230 1,462 SH   SOLE 0 1,462 0 0
ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 BBG001J2PFF5 213,032 66,365 SH   SOLE 0 66,365 0 0
AES CORP COM 00130H105 BBG000C23KJ3 15,490,870 863,964 SH   SOLE 0 863,964 0 0
ALPHABET INC CAP STK CL C 02079K107 BBG009S3NB30 1,568,278 10,300 SH   SOLE 0 10,300 0 0
AMAZON COM INC COM 023135106 BBG000BVPV84 92,328,495 511,855 SH   SOLE 0 511,855 0 0
AMERICAN INTL GROUP INC COM NEW 026874784 BBG000BBDZG3 1,663,458 21,280 SH   SOLE 0 21,280 0 0
AMERICAN TOWER CORP NEW CL A 03027X100 BBG000B9XYV2 111,372,293 563,653 SH   SOLE 0 563,653 0 0
APPLE INC COM 037833100 BBG000B9XRY4 53,890,115 314,265 SH   SOLE 0 314,265 0 0
ATOMERA INC COM 04965B100 BBG00D88BWP5 2,338,866 379,686 SH   SOLE 0 379,686 0 0
AXOS FINANCIAL INC. COM 05465C100 BBG000QPHD08 1,123,492 20,790 SH   SOLE 0 20,790 0 0
BANK AMERICA CORP COM 060505104 BBG000BCTLF6 1,282,287 33,816 SH   SOLE 0 33,816 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 BBG000DWCFL4 3,806,640 6 SH   SOLE 0 6 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 BBG000DWG505 61,741,209 146,821 SH   SOLE 0 146,821 0 0
BLACK STONE MINERALS LP COM UNIT 09225M101 BBG008B5CF29 1,180,922 73,900 SH   SOLE 0 73,900 0 0
BOK FINL CORP COM NEW 05561Q201 BBG000CFZ003 11,670,200 126,850 SH   SOLE 0 126,850 0 0
BRIGHTSPIRE CAPITAL INC COM CL A 10949T109 BBG00JVRRQF1 2,014,464 292,375 SH   SOLE 0 292,375 0 0
BROOKFIELD CORP CL A LTD VT SH 11271J107 BBG000C9KL89 628,050 15,000 SH   SOLE 0 15,000 0 0
BROOKFIELD INFRAST PARTNERS LP INT UNIT G16252101 BBG000B9Y8D8 586,620 18,796 SH   SOLE 0 18,796 0 0
CARMAX INC COM 143130102 BBG000BLMZK6 21,156,059 242,866 SH   SOLE 0 242,866 0 0
CCC INTELLIGENT SOLUTIONS HL COM 12510Q100 BBG00WNSJM49 24,439,279 2,043,418 SH   SOLE 0 2,043,418 0 0
CHEVRON CORP COM 166764100 BBG000K4ND22 425,109 2,695 SH   SOLE 0 2,695 0 0
COPART INC COM 217204106 BBG000BM9RH1 89,800,558 1,550,424 SH   SOLE 0 1,550,424 0 0
COSTCO WHSL CORP NEW COM 22160K105 BBG000F6H8W8 366,315 500 SH   SOLE 0 500 0 0
CROWN CASTLE INC COM 22822V101 BBG000FV1Z23 424,378 4,010 SH   SOLE 0 4,010 0 0
CYTOSORBENTS CORP COM NEW 23283X206 BBG000C3P8V0 3,014,061 3,172,696 SH   SOLE 0 3,172,696 0 0
DENNYS CORP COM 24869P104 BBG000BC09P3 274,982 30,690 SH   SOLE 0 30,690 0 0
DIGITALBRIDGE GROUP INC CL A NEW 25401T603 BBG00D30HGP6 62,882,361 3,263,226 SH   SOLE 0 3,263,226 0 0
DOLLAR TREE INC COM 256746108 BBG000BSC0K9 1,057,344 7,941 SH   SOLE 0 7,941 0 0
ENERGY RECOVERY INC COM 29270J100 BBG000VFBBC1 23,609,802 1,495,238 SH   SOLE 0 1,495,238 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 BBG000BM2FL9 7,094,529 451,019 SH   SOLE 0 451,019 0 0
ENOVIX CORPORATION COM 293594107 BBG00YC53854 230,127 28,730 SH   SOLE 0 28,730 0 0
ENTERPRISE PRODS PARTNERS LP COM 293792107 BBG000BR3012 3,723,893 127,618 SH   SOLE 0 127,618 0 0
EQUINIX INC COM 29444U700 BBG000MBDGM6 2,353,016 2,851 SH   SOLE 0 2,851 0 0
EXXON MOBIL CORP COM 30231G102 BBG000GZQ728 929,455 7,996 SH   SOLE 0 7,996 0 0
GENERAL ELECTRIC CO COM 369604137 BBG000BK6MB5 425,660 2,425 SH   SOLE 0 2,425 0 0
GLADSTONE COMMERCIAL CORP COM 376536108 BBG000M2NYQ2 927,114 66,988 SH   SOLE 0 66,988 0 0
INTEL CORP COM 458140100 BBG000C0G1D1 503,229 11,393 SH   SOLE 0 11,393 0 0
JPMORGAN CHASE & CO COM 46625H100 BBG000DMBXR2 585,677 2,924 SH   SOLE 0 2,924 0 0
KINDER MORGAN INC DEL COM 49456B101 BBG0019JZ882 2,729,359 148,820 SH   SOLE 0 148,820 0 0
L3HARRIS TECHNOLOGIES INC COM 502431109 BBG000BLGFJ9 290,645 1,364 SH   SOLE 0 1,364 0 0
LOCKHEED MARTIN CORP COM 539830109 BBG000C1BW00 44,565,360 97,974 SH   SOLE 0 97,974 0 0
LUNA INNOVATIONS COM 550351100 BBG000GP4ZR5 714,330 222,880 SH   SOLE 0 222,880 0 0
MAGNITE INC COM 55955D100 BBG000PBDRC0 376,250 35,000 SH   SOLE 0 35,000 0 0
MARKEL GROUP INC COM 570535104 BBG000FC7366 122,997,345 80,841 SH   SOLE 0 80,841 0 0
MASTERCARD INCORPORATED CL A 57636Q104 BBG000F1ZSQ2 41,422,180 86,015 SH   SOLE 0 86,015 0 0
MICROSOFT CORP COM 594918104 BBG000BPH459 170,643,093 405,598 SH   SOLE 0 405,598 0 0
MPLX LP COM UNIT REP LTD 55336V100 BBG0035TJGV4 8,072,323 194,233 SH   SOLE 0 194,233 0 0
NEWTEK BUSINESS SVCS CORP COM NEW 652526203 BBG000BH37H2 657,800 59,800 SH   SOLE 0 59,800 0 0
OPTIMIZERX CORP COM NEW 68401U204 BBG000HKQH91 1,072,359 88,260 SH   SOLE 0 88,260 0 0
OREILLY AUTOMOTIVE INC COM 67103H107 BBG000BGYWY6 89,624,605 79,392 SH   SOLE 0 79,392 0 0
PACCAR INC COM 693718108 BBG000BQVTF5 278,753 2,250 SH   SOLE 0 2,250 0 0
PNC FINL SVCS GROUP INC COM 693475105 BBG000BRD0D8 204,586 1,266 SH   SOLE 0 1,266 0 0
PRIVIA HEALTH GROUP INC COM 74276R102 BBG00ZXYXVP9 719,835 36,745 SH   SOLE 0 36,745 0 0
PROCTER AND GAMBLE CO COM 742718109 BBG000BR2TH3 360,357 2,221 SH   SOLE 0 2,221 0 0
SBA COMMUNICATIONS CORP NEW CL A 78410G104 BBG000D2M0Z7 8,687,070 40,088 SH   SOLE 0 40,088 0 0
SIRIUS XM HOLDINGS INC COM 82968B103 BBG000BT0093 38,800 10,000 SH   SOLE 0 10,000 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 BBG000CRF6Q8 434,892 2,114 SH   SOLE 0 2,114 0 0
SPROTT PHYSICAL GOLD TRUST UNIT 85207H104 BBG000Q83F79 672,278 38,860 SH   SOLE 0 38,860 0 0
STARWOOD PPTY TR INC COM 85571B105 BBG000M1J270 1,433,834 70,528 SH   SOLE 0 70,528 0 0
UNIVERSAL DISPLAY CORP COM 91347P105 BBG000BLRP41 35,544,972 211,012 SH   SOLE 0 211,012 0 0
VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 BBG0015VYNT4 927,751 1,930 SH   SOLE 0 1,930 0 0
VIRGINIA NATL BANKSHARES CORP COM 928031103 BBG000C49RT7 325,080 10,800 SH   SOLE 0 10,800 0 0
VISA INC COM CL A 92826C839 BBG000PSKYX7 19,223,122 68,880 SH   SOLE 0 68,880 0 0
WALMART INC COM 931142103 BBG000BWXBC2 215,890 3,588 SH   SOLE 0 3,588 0 0
WALGREENS BOOTS ALLIANCE INC COM 931427108 BBG000BWLMJ4 8,358,941 385,382 SH   SOLE 0 385,382 0 0
DISNEY WALT CO COM 254687106 BBG000BH4R78 340,895 2,786 SH   SOLE 0 2,786 0 0