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 1,144 28,000 SH   SOLE 0 28,000 0 0
AES CORP COM 00130H105 55,905 2,144,404 SH   SOLE 0 2,144,404 0 0
AMAZON COM INC COM 023135106 52,882 15,372 SH   SOLE 0 15,372 0 0
AMERICAN INTL GROUP INC COM NEW 026874784 1,019 21,411 SH   SOLE 0 21,411 0 0
AMERICAN TOWER CORP CL A 03027X100 165,365 612,147 SH   SOLE 0 612,147 0 0
ANTARES PHARMA INC COM 036642106 1,314 301,297 SH   SOLE 0 301,297 0 0
APPLE INC COM 037833100 46,507 339,566 SH   SOLE 0 339,566 0 0
ATOMERA INC COM 04965B100 5,191 242,131 SH   SOLE 0 242,131 0 0
BANK AMER CORP COM 060505104 37,887 918,916 SH   SOLE 0 918,916 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 2,512 6 SH   SOLE 0 6 0 0
BERKSHIRE HATHAWAY INC DEL CL B 084670702 44,406 159,780 SH   SOLE 0 159,780 0 0
B O K FINL CORP COM NEW 05561Q201 11,598 133,925 SH   SOLE 0 133,925 0 0
BRIGHTSPIRE CAPITAL INC COM CL A 10949T109 1,620 172,350 SH   SOLE 0 172,350 0 0
BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 637 12,500 SH   SOLE 0 12,500 0 0
BROOKFIELD INFRASTRUCTURE CO COM SB VTG SHS A 11275Q107 677 8,983 SH   SOLE 0 8,983 0 0
BROOKFIELD INFRAST PARTNERS LP INT UNIT G16252101 6,883 123,907 SH   SOLE 0 123,907 0 0
CABLE ONE INC COM 12685J105 268 140 SH   SOLE 0 140 0 0
CARMAX INC COM 143130102 56,228 435,368 SH   SOLE 0 435,368 0 0
CITY OFFICE REIT INC COM 178587101 439 35,305 SH   SOLE 0 35,305 0 0
COPART INC COM 217204106 53,096 402,758 SH   SOLE 0 402,758 0 0
COSTCO WHSL CORP NEW COM 22160K105 218 550 SH   SOLE 0 550 0 0
CROWN CASTLE INTL CORP NEW COM 22822V101 236 1,210 SH   SOLE 0 1,210 0 0
CYTOSORBENTS CORP COM NEW 23283X206 10,317 1,366,549 SH   SOLE 0 1,366,549 0 0
DENNYS CORP COM 24869P104 499 30,290 SH   SOLE 0 30,290 0 0
DIGITALBRIDGE GROUP INC CL A COM 25401T108 30,207 3,823,698 SH   SOLE 0 3,823,698 0 0
DOLLAR TREE INC COM 256746108 49,324 495,714 SH   SOLE 0 495,714 0 0
DUCK CREEK TECHNOLOGIES INC SHS 264120106 9,487 218,051 SH   SOLE 0 218,051 0 0
ENERGY RECOVERY INC COM 29270J100 36,634 1,608,177 SH   SOLE 0 1,608,177 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 4,880 459,075 SH   SOLE 0 459,075 0 0
ENTERPRISE PRODS PARTNERS LP COM 293792107 3,055 126,608 SH   SOLE 0 126,608 0 0
ENVIVA PARTNERS LP COM UNIT 29414J107 1,310 25,000 SH   SOLE 0 25,000 0 0
EQUINIX COM NEW 29444U700 2,656 3,309 SH   SOLE 0 3,309 0 0
EXXON MOBIL CORP COM 30231G102 328 5,205 SH   SOLE 0 5,205 0 0
GENERAL ELECTRIC CO COM 369604103 166 12,350 SH   SOLE 0 12,350 0 0
GLADSTONE COML CORP COM 376536108 2,097 92,950 SH   SOLE 0 92,950 0 0
IRON MTN INC NEW COM 46284V101 1,656 39,130 SH   SOLE 0 39,130 0 0
JPMORGAN CHASE & CO COM 46625H100 455 2,924 SH   SOLE 0 2,924 0 0
KINDER MORGAN INC COM 49456B101 2,778 152,380 SH   SOLE 0 152,380 0 0
LOCKHEED MARTIN CORP COM 539830109 47,742 126,185 SH   SOLE 0 126,185 0 0
LUNA INNOVATIONS COM 550351100 1,347 124,410 SH   SOLE 0 124,410 0 0
MARKEL CORP COM 570535104 100,933 85,053 SH   SOLE 0 85,053 0 0
MASTERCARD INC CL A 57636Q104 32,407 88,765 SH   SOLE 0 88,765 0 0
MICROSOFT CORP COM 594918104 149,254 550,956 SH   SOLE 0 550,956 0 0
MOODY'S CORP COM 615369105 346 955 SH   SOLE 0 955 0 0
MPLX LP COM UNIT REP LTD 55336V100 6,775 228,797 SH   SOLE 0 228,797 0 0
NEW RESIDENTIAL INVT CORP COM NEW 64828T201 271 25,635 SH   SOLE 0 25,635 0 0
NEWTEK BUSINESS CVCS CORP COM NEW 652526203 1,327 38,000 SH   SOLE 0 38,000 0 0
NOVAVAX INC COM 670002401 10,534 49,614 SH   SOLE 0 49,614 0 0
OMNICOM GROUP INC COM 681919106 299 3,738 SH   SOLE 0 3,738 0 0
OPTIMIZERX CORP COM NEW 68401U204 39,520 638,446 SH   SOLE 0 638,446 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 51,235 90,488 SH   SOLE 0 90,488 0 0
PNC FINL SVCS GROUP INC COM 693475105 242 1,266 SH   SOLE 0 1,266 0 0
PROCTER AND GAMBLE CO COM 742718109 300 2,221 SH   SOLE 0 2,221 0 0
SBA COMMUNICATIONS CORP COM 78410G104 2,039 6,398 SH   SOLE 0 6,398 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 293 1,769 SH   SOLE 0 1,769 0 0
SPROTT PHYSICAL GOLD TRUST UNIT 85207H104 545 38,860 SH   SOLE 0 38,860 0 0
STARWOOD PPTY TR INC COM 85571B105 1,971 75,320 SH   SOLE 0 75,320 0 0
STORE CAP CORP COM 862121100 317 9,173 SH   SOLE 0 9,173 0 0
KRAFT HEINZ CO COM 500754106 347 8,520 SH   SOLE 0 8,520 0 0
TRITERRAS INC *W EXP 11/10/2025 G9103H110 32 20,000 SH   SOLE 0 20,000 0 0
TRUPANION INC COM 898202106 22,555 195,957 SH   SOLE 0 195,957 0 0
UNIVERSAL DISPLAY CORP COM 91347P105 46,982 211,317 SH   SOLE 0 211,317 0 0
VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 888 2,256 SH   SOLE 0 2,256 0 0
VIRGINIA NATL BANKSHARES CORP COM 928031103 420 10,800 SH   SOLE 0 10,800 0 0
VISA INC COM CL A 92826C839 19,497 83,387 SH   SOLE 0 83,387 0 0
WALGREENS BOOTS ALLIANCE INC COM 931427108 17,628 335,075 SH   SOLE 0 335,075 0 0
DISNEY WALT CO COM DISNEY 254687106 890 5,062 SH   SOLE 0 5,062 0 0