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 236,274 1,462 SH   SOLE 0 1,462 0 0
ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 BBG001J2PFF5 234,166 30,650 SH   SOLE 0 30,650 0 0
AES CORP COM 00130H105 BBG000C23KJ3 50,380,869 1,751,769 SH   SOLE 0 1,751,769 0 0
ALPHABET INC CAP STK CL C 02079K107 BBG009S3NB30 979,579 11,040 SH   SOLE 0 11,040 0 0
AMAZON COM INC COM 023135106 BBG000BVPV84 37,809,408 450,112 SH   SOLE 0 450,112 0 0
AMERICAN INTL GROUP INC COM NEW 026874784 BBG000BBDZG3 1,354,032 21,411 SH   SOLE 0 21,411 0 0
AMERICAN TOWER CORP NEW CL A 03027X100 BBG000B9XYV2 126,958,820 599,258 SH   SOLE 0 599,258 0 0
APPLE INC COM 037833100 BBG000B9XRY4 42,891,592 330,113 SH   SOLE 0 330,113 0 0
ATOMERA INC COM 04965B100 BBG00D88BWP5 1,697,942 272,981 SH   SOLE 0 272,981 0 0
BANK AMERICA CORP COM 060505104 BBG000BCTLF6 26,164,610 789,994 SH   SOLE 0 789,994 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 BBG000DWCFL4 2,812,266 6 SH   SOLE 0 6 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 BBG000DWG505 48,438,609 156,810 SH   SOLE 0 156,810 0 0
BOK FINL CORP COM NEW 05561Q201 BBG000CFZ003 13,608,945 131,120 SH   SOLE 0 131,120 0 0
BRIGHTSPIRE CAPITAL INC COM CL A 10949T109 BBG00JVRRQF1 1,335,401 214,350 SH   SOLE 0 214,350 0 0
BROOKFIELD CORP CL A LTD VT SH 11271J107 BBG000C9KL89 471,900 15,000 SH   SOLE 0 15,000 0 0
BROOKFIELD INFRAST PARTNERS LP INT UNIT G16252101 BBG000B9Y8D8 5,694,459 183,751 SH   SOLE 0 183,751 0 0
CARMAX INC COM 143130102 BBG000BLMZK6 24,542,751 403,067 SH   SOLE 0 403,067 0 0
CITY OFFICE REIT INC COM 178587101 BBG005T5RWR6 274,906 32,805 SH   SOLE 0 32,805 0 0
COPART INC COM 217204106 BBG000BM9RH1 49,613,659 814,808 SH   SOLE 0 814,808 0 0
COSTCO WHSL CORP NEW COM 22160K105 BBG000F6H8W8 228,250 500 SH   SOLE 0 500 0 0
CYTOSORBENTS CORP COM NEW 23283X206 BBG000C3P8V0 3,792,988 2,447,089 SH   SOLE 0 2,447,089 0 0
DENNYS CORP COM 24869P104 BBG000BC09P3 284,957 30,940 SH   SOLE 0 30,940 0 0
DIGITALBRIDGE GROUP INC CL A NEW 25401T603 BBG00D30HGP6 39,307,368 3,592,995 SH   SOLE 0 3,592,995 0 0
DOLLAR TREE INC COM 256746108 BBG000BSC0K9 1,931,505 13,656 SH   SOLE 0 13,656 0 0
DUCK CREEK TECHNOLOGIES INC SHS 264120106 BBG00PPWYWJ8 248,170 20,595 SH   SOLE 0 20,595 0 0
ENERGY RECOVERY INC COM 29270J100 BBG000VFBBC1 35,312,179 1,723,386 SH   SOLE 0 1,723,386 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 BBG000BM2FL9 5,368,801 452,300 SH   SOLE 0 452,300 0 0
ENOVIX CORPORATION COM 293594107 BBG00YC53854 155,500 12,500 SH   SOLE 0 12,500 0 0
ENTERPRISE PRODS PARTNERS LP COM 293792107 BBG000BR3012 3,053,785 126,608 SH   SOLE 0 126,608 0 0
EQUINIX INC COM 29444U700 BBG000MBDGM6 1,946,094 2,971 SH   SOLE 0 2,971 0 0
EXXON MOBIL CORP COM 30231G102 BBG000GZQ728 937,109 8,496 SH   SOLE 0 8,496 0 0
GLADSTONE COMMERCIAL CORP COM 376536108 BBG000M2NYQ2 1,710,048 92,435 SH   SOLE 0 92,435 0 0
INTEL CORP COM 458140100 BBG000C0G1D1 331,987 12,561 SH   SOLE 0 12,561 0 0
JPMORGAN CHASE & CO COM 46625H100 BBG000DMBXR2 392,108 2,924 SH   SOLE 0 2,924 0 0
KINDER MORGAN INC DEL COM 49456B101 BBG0019JZ882 2,840,458 157,105 SH   SOLE 0 157,105 0 0
L3HARRIS TECHNOLOGIES INC COM 502431109 BBG000BLGFJ9 282,541 1,357 SH   SOLE 0 1,357 0 0
LOCKHEED MARTIN CORP COM 539830109 BBG000C1BW00 51,279,938 105,408 SH   SOLE 0 105,408 0 0
LUNA INNOVATIONS COM 550351100 BBG000GP4ZR5 1,392,424 158,410 SH   SOLE 0 158,410 0 0
MAGNITE INC COM 55955D100 BBG000PBDRC0 370,650 35,000 SH   SOLE 0 35,000 0 0
MARKEL CORP COM 570535104 BBG000FC7366 109,942,064 83,448 SH   SOLE 0 83,448 0 0
MASTERCARD INCORPORATED CL A 57636Q104 BBG000F1ZSQ2 32,012,891 92,062 SH   SOLE 0 92,062 0 0
MICROSOFT CORP COM 594918104 BBG000BPH459 119,422,384 497,967 SH   SOLE 0 497,967 0 0
MPLX LP COM UNIT REP LTD 55336V100 BBG0035TJGV4 7,416,717 225,844 SH   SOLE 0 225,844 0 0
NEWTEK BUSINESS SVCS CORP COM NEW 652526203 BBG000BH37H2 763,750 47,000 SH   SOLE 0 47,000 0 0
NOVAVAX INC COM NEW 670002401 BBG000NVSBL7 510,032 49,614 SH   SOLE 0 49,614 0 0
OPTIMIZERX CORP COM NEW 68401U204 BBG000HKQH91 7,068,331 420,734 SH   SOLE 0 420,734 0 0
OREILLY AUTOMOTIVE INC COM 67103H107 BBG000BGYWY6 72,347,720 85,717 SH   SOLE 0 85,717 0 0
PFIZER INC COM 717081103 BBG000BR2B91 208,598 4,071 SH   SOLE 0 4,071 0 0
PRIVIA HEALTH GROUP INC COM 74276R102 BBG00ZXYXVP9 678,143 29,861 SH   SOLE 0 29,861 0 0
PROCTER AND GAMBLE CO COM 742718109 BBG000BR2TH3 341,010 2,250 SH   SOLE 0 2,250 0 0
SBA COMMUNICATIONS CORP NEW CL A 78410G104 BBG000D2M0Z7 1,792,863 6,396 SH   SOLE 0 6,396 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 BBG000CRF6Q8 490,938 2,894 SH   SOLE 0 2,894 0 0
SPROTT PHYSICAL GOLD TRUST UNIT 85207H104 BBG000Q83F79 547,926 38,860 SH   SOLE 0 38,860 0 0
SRAX INC CL A 78472M106 BBG003GW8KW7 52,632 34,400 SH   SOLE 0 34,400 0 0
STARWOOD PPTY TR INC COM 85571B105 BBG000M1J270 1,208,130 65,910 SH   SOLE 0 65,910 0 0
KRAFT HEINZ CO COM 500754106 BBG005CPNTQ2 322,627 7,925 SH   SOLE 0 7,925 0 0
TRIPLEPOINT VENTURE GROWTH B COM 89677Y100 BBG005GXFKJ7 323,330 31,000 SH   SOLE 0 31,000 0 0
UNIVERSAL DISPLAY CORP COM 91347P105 BBG000BLRP41 24,787,942 229,433 SH   SOLE 0 229,433 0 0
VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 BBG0015VYNT4 696,707 1,983 SH   SOLE 0 1,983 0 0
VIRGINIA NATL BANKSHARES CORP COM 928031103 BBG000C49RT7 395,928 10,800 SH   SOLE 0 10,800 0 0
VISA INC COM CL A 92826C839 BBG000PSKYX7 16,404,928 78,961 SH   SOLE 0 78,961 0 0
WALMART INC COM 931142103 BBG000BWXBC2 231,968 1,636 SH   SOLE 0 1,636 0 0
WALGREENS BOOTS ALLIANCE INC COM 931427108 BBG000BWLMJ4 12,481,229 334,080 SH   SOLE 0 334,080 0 0
DISNEY WALT CO COM 254687106 BBG000BH4R78 549,082 6,320 SH   SOLE 0 6,320 0 0