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
ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 218 30,650 SH   SOLE 0 30,650 0 0
AES CORP COM 00130H105 40,997 1,814,045 SH   SOLE 0 1,814,045 0 0
ALPHABET INC CAP STK CL C 02079K107 1,061 11,040 SH   SOLE 0 11,040 0 0
AMAZON COM INC COM 023135106 52,280 462,654 SH   SOLE 0 462,654 0 0
AMERICAN INTL GROUP INC COM NEW 026874784 1,017 21,411 SH   SOLE 0 21,411 0 0
AMERICAN TOWER CORP CL A 03027X100 127,241 592,646 SH   SOLE 0 592,646 0 0
APPLE INC COM 037833100 45,585 329,846 SH   SOLE 0 329,846 0 0
ATOMERA INC COM 04965B100 2,715 267,981 SH   SOLE 0 267,981 0 0
BANK AMER CORP COM 060505104 24,013 795,126 SH   SOLE 0 795,126 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 2,439 6 SH   SOLE 0 6 0 0
BERKSHIRE HATHAWAY INC DEL CL B 084670702 41,455 155,252 SH   SOLE 0 155,252 0 0
B O K FINL CORP COM NEW 05561Q201 11,740 132,120 SH   SOLE 0 132,120 0 0
BRIGHTSPIRE CAPITAL INC COM CL A 10949T109 1,340 212,350 SH   SOLE 0 212,350 0 0
BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 511 12,500 SH   SOLE 0 12,500 0 0
BROOKFIELD INFRAST PARTNERS LP INT UNIT G16252101 6,597 183,751 SH   SOLE 0 183,751 0 0
CARMAX INC COM 143130102 26,757 405,283 SH   SOLE 0 405,283 0 0
CITY OFFICE REIT INC COM 178587101 327 32,805 SH   SOLE 0 32,805 0 0
COPART INC COM 217204106 43,289 406,856 SH   SOLE 0 406,856 0 0
COSTCO WHSL CORP NEW COM 22160K105 260 550 SH   SOLE 0 550 0 0
CYTOSORBENTS CORP COM NEW 23283X206 3,148 2,314,854 SH   SOLE 0 2,314,854 0 0
DENNYS CORP COM 24869P104 291 30,940 SH   SOLE 0 30,940 0 0
DIGITALBRIDGE GROUP INC CL A COM 25401T108 42,724 3,415,205 SH   SOLE 0 3,415,205 0 0
DOLLAR TREE INC COM 256746108 1,859 13,656 SH   SOLE 0 13,656 0 0
DUCK CREEK TECHNOLOGIES INC SHS 264120106 4,594 387,695 SH   SOLE 0 387,695 0 0
ENERGY RECOVERY INC COM 29270J100 37,418 1,721,164 SH   SOLE 0 1,721,164 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 4,989 452,300 SH   SOLE 0 452,300 0 0
ENTERPRISE PRODS PARTNERS LP COM 293792107 3,011 126,608 SH   SOLE 0 126,608 0 0
EQUINIX COM NEW 29444U700 1,690 2,971 SH   SOLE 0 2,971 0 0
EXXON MOBIL CORP COM 30231G102 742 8,496 SH   SOLE 0 8,496 0 0
GLADSTONE COML CORP COM 376536108 1,433 92,435 SH   SOLE 0 92,435 0 0
JPMORGAN CHASE & CO COM 46625H100 306 2,924 SH   SOLE 0 2,924 0 0
KINDER MORGAN INC COM 49456B101 2,614 157,105 SH   SOLE 0 157,105 0 0
L3HARRIS TECHNOLOGIES INC COM 502431109 283 1,362 SH   SOLE 0 1,362 0 0
LOCKHEED MARTIN CORP COM 539830109 41,133 106,483 SH   SOLE 0 106,483 0 0
LUNA INNOVATIONS COM 550351100 641 144,410 SH   SOLE 0 144,410 0 0
MAGNITE INC COM 55955D100 210 32,000 SH   SOLE 0 32,000 0 0
MARKEL CORP COM 570535104 89,716 82,747 SH   SOLE 0 82,747 0 0
MASTERCARD INC CL A 57636Q104 26,318 92,557 SH   SOLE 0 92,557 0 0
MICROSOFT CORP COM 594918104 116,321 499,446 SH   SOLE 0 499,446 0 0
MPLX LP COM UNIT REP LTD 55336V100 6,778 225,844 SH   SOLE 0 225,844 0 0
NEWTEK BUSINESS CVCS CORP COM NEW 652526203 767 47,000 SH   SOLE 0 47,000 0 0
NOVAVAX INC COM 670002401 903 49,614 SH   SOLE 0 49,614 0 0
OPTIMIZERX CORP COM NEW 68401U204 6,244 421,296 SH   SOLE 0 421,296 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 60,274 85,695 SH   SOLE 0 85,695 0 0
PRIVIA HEALTH GROUP INC COM 74276R102 596 17,500 SH   SOLE 0 17,500 0 0
PROCTER AND GAMBLE CO COM 742718109 280 2,221 SH   SOLE 0 2,221 0 0
SBA COMMUNICATIONS CORP COM 78410G104 2,157 7,576 SH   SOLE 0 7,576 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 448 2,894 SH   SOLE 0 2,894 0 0
SPROTT PHYSICAL GOLD TRUST UNIT 85207H104 497 38,860 SH   SOLE 0 38,860 0 0
SRAX INC CL A 78472M106 59 34,400 SH   SOLE 0 34,400 0 0
STARWOOD PPTY TR INC COM 85571B105 1,261 69,195 SH   SOLE 0 69,195 0 0
KRAFT HEINZ CO COM 500754106 264 7,925 SH   SOLE 0 7,925 0 0
TRIPLEPOINT VENTURE GROWTH B COM 89677Y100 315 29,000 SH   SOLE 0 29,000 0 0
UNIVERSAL DISPLAY CORP COM 91347P105 22,019 233,371 SH   SOLE 0 233,371 0 0
VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 651 1,983 SH   SOLE 0 1,983 0 0
VIRGINIA NATL BANKSHARES CORP COM 928031103 350 10,800 SH   SOLE 0 10,800 0 0
VISA INC COM CL A 92826C839 14,050 79,086 SH   SOLE 0 79,086 0 0
WALMART INC COM 931142103 208 1,607 SH   SOLE 0 1,607 0 0
WALGREENS BOOTS ALLIANCE INC COM 931427108 15,182 483,508 SH   SOLE 0 483,508 0 0
DISNEY WALT CO COM DISNEY 254687106 602 6,377 SH   SOLE 0 6,377 0 0