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
Expires: July 31, 2015
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
ABBOTT LABS COM 002824100 208,720 1,535 SH SOLE 0 1,535 0 0
ABBVIE INC COM 00287Y109 271,376 1,462 SH SOLE 0 1,462 0 0
ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 889,652 76,365 SH SOLE 0 76,365 0 0
ADOBE INC COM 00724F101 29,248,128 75,600 SH SOLE 0 75,600 0 0
AES CORP COM 00130H105 2,003,905 190,485 SH SOLE 0 190,485 0 0
ALPHABET INC CAP STK CL C 02079K107 1,910,564 10,770 SH SOLE 0 10,770 0 0
AMAZON COM INC COM 023135106 87,796,148 400,183 SH SOLE 0 400,183 0 0
AMENTUM HOLDINGS INC COM 023939101 21,139,261 895,352 SH SOLE 0 895,352 0 0
AMERICAN INTL GROUP INC COM NEW 026874784 1,815,364 21,210 SH SOLE 0 21,210 0 0
AMERICAN TOWER CORP NEW CL A 03027X100 95,698,391 432,985 SH SOLE 0 432,985 0 0
APPLE INC COM 037833100 49,637,355 241,933 SH SOLE 0 241,933 0 0
ARISTA NETWORKS INC COM SHS 040413205 344,785 3,370 SH SOLE 0 3,370 0 0
ATOMERA INC COM 04965B100 2,896,821 574,766 SH SOLE 0 574,766 0 0
AXOS FINANCIAL INC. COM 05465C100 1,580,872 20,790 SH SOLE 0 20,790 0 0
BANK AMERICA CORP COM 060505104 1,167,858 24,680 SH SOLE 0 24,680 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 4,372,800 6 SH SOLE 0 6 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 54,935,414 113,089 SH SOLE 0 113,089 0 0
BLACK STONE MINERALS LP COM UNIT 09225M101 966,612 73,900 SH SOLE 0 73,900 0 0
BOK FINL CORP COM NEW 05561Q201 12,252,565 125,500 SH SOLE 0 125,500 0 0
BRIGHTSPIRE CAPITAL INC COM CL A 10949T109 1,120,595 221,900 SH SOLE 0 221,900 0 0
BROOKFIELD CORP CL A LTD VT SH 11271J107 927,750 15,000 SH SOLE 0 15,000 0 0
BROOKFIELD INFRAST PARTNERS LP INT UNIT G16252101 772,879 23,071 SH SOLE 0 23,071 0 0
BURKE HERBERT FINL SVCS CORP COM 12135Y108 206,069 3,450 SH SOLE 0 3,450 0 0
CARMAX INC COM 143130102 15,117,950 224,936 SH SOLE 0 224,936 0 0
CCC INTELLIGENT SOLUTIONS HL COM 12510Q100 620,326 65,922 SH SOLE 0 65,922 0 0
COHERENT CORP COM 19247G107 545,073 6,110 SH SOLE 0 6,110 0 0
COPART INC COM 217204106 56,664,319 1,154,765 SH SOLE 0 1,154,765 0 0
COSTCO WHSL CORP NEW COM 22160K105 494,970 500 SH SOLE 0 500 0 0
CROWN CASTLE INC COM 22822V101 332,845 3,240 SH SOLE 0 3,240 0 0
CYTOSORBENTS CORP COM NEW 23283X206 6,474,928 5,058,537 SH SOLE 0 5,058,537 0 0
DENNYS CORP COM 24869P104 125,829 30,690 SH SOLE 0 30,690 0 0
DIGITALBRIDGE GROUP INC CL A NEW 25401T603 1,212,471 117,147 SH SOLE 0 117,147 0 0
DOLLAR TREE INC COM 256746108 283,254 2,860 SH SOLE 0 2,860 0 0
ENERGY RECOVERY INC COM 29270J100 13,520,727 1,057,960 SH SOLE 0 1,057,960 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 7,974,154 439,832 SH SOLE 0 439,832 0 0
ENOVIX CORPORATION COM 293594107 490,943 47,480 SH SOLE 0 47,480 0 0
ENTERPRISE PRODS PARTNERS LP COM 293792107 3,891,073 125,478 SH SOLE 0 125,478 0 0
EQUINIX INC COM 29444U700 2,180,383 2,741 SH SOLE 0 2,741 0 0
EXXON MOBIL CORP COM 30231G102 899,591 8,345 SH SOLE 0 8,345 0 0
GE AEROSPACE COM NEW 369604301 238,086 925 SH SOLE 0 925 0 0
GLADSTONE COMMERCIAL CORP COM 376536108 959,938 66,988 SH SOLE 0 66,988 0 0
INTEL CORP COM 458140100 277,603 12,393 SH SOLE 0 12,393 0 0
KINDER MORGAN INC DEL COM 49456B101 4,286,079 145,785 SH SOLE 0 145,785 0 0
L3HARRIS TECHNOLOGIES INC COM 502431109 340,390 1,357 SH SOLE 0 1,357 0 0
LAMAR ADVERTISING CO NEW CL A 512816109 468,450 3,860 SH SOLE 0 3,860 0 0
LOCKHEED MARTIN CORP COM 539830109 34,020,064 73,455 SH SOLE 0 73,455 0 0
LULULEMON ATHLETICA INC COM 550021109 516,737 2,175 SH SOLE 0 2,175 0 0
LUNA INNOVATIONS COM 550351100 105,386 119,080 SH SOLE 0 119,080 0 0
MARKEL GROUP INC COM 570535104 97,448,883 48,789 SH SOLE 0 48,789 0 0
MASTERCARD INCORPORATED CL A 57636Q104 36,756,241 65,410 SH SOLE 0 65,410 0 0
MICROSOFT CORP COM 594918104 132,105,542 265,587 SH SOLE 0 265,587 0 0
MPLX LP COM UNIT REP LTD 55336V100 9,424,630 182,967 SH SOLE 0 182,967 0 0
NEWTEK BUSINESS SVCS CORP COM NEW 652526203 426,384 37,800 SH SOLE 0 37,800 0 0
OPTIMIZERX CORP COM NEW 68401U204 1,043,010 77,260 SH SOLE 0 77,260 0 0
ORACLE CORP COM 68389X105 295,151 1,350 SH SOLE 0 1,350 0 0
OREILLY AUTOMOTIVE INC COM 67103H107 71,562,071 793,987 SH SOLE 0 793,987 0 0
PACCAR INC COM 693718108 213,885 2,250 SH SOLE 0 2,250 0 0
PNC FINL SVCS GROUP INC COM 693475105 236,008 1,266 SH SOLE 0 1,266 0 0
PRIVIA HEALTH GROUP INC COM 74276R102 845,135 36,745 SH SOLE 0 36,745 0 0
RTX CORPORATION COM 75513E101 238,597 1,634 SH SOLE 0 1,634 0 0
SBA COMMUNICATIONS CORP NEW CL A 78410G104 14,669,574 62,466 SH SOLE 0 62,466 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 644,411 2,114 SH SOLE 0 2,114 0 0
SPROTT PHYSICAL GOLD TRUST UNIT 85207H104 1,528,859 60,310 SH SOLE 0 60,310 0 0
STARWOOD PPTY TR INC COM 85571B105 1,922,566 95,793 SH SOLE 0 95,793 0 0
TARGA RES CORP COM 87612G101 278,876 1,602 SH SOLE 0 1,602 0 0
TRIPLEPOINT VENTURE GROWTH B COM 89677Y100 70,100 10,000 SH SOLE 0 10,000 0 0
UNIVERSAL DISPLAY CORP COM 91347P105 34,467,711 223,150 SH SOLE 0 223,150 0 0
VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 1,096,298 1,930 SH SOLE 0 1,930 0 0
VIRGINIA NATL BANKSHARES CORP COM 928031103 399,600 10,800 SH SOLE 0 10,800 0 0
VISA INC COM CL A 92826C839 14,892,207 41,944 SH SOLE 0 41,944 0 0
WALGREENS BOOTS ALLIANCE INC COM 931427108 590,531 51,440 SH SOLE 0 51,440 0 0
WALMART INC COM 931142103 350,835 3,588 SH SOLE 0 3,588 0 0
DISNEY WALT CO COM 254687106 328,130 2,646 SH SOLE 0 2,646 0 0
WAYSTAR HLDG CORP COM 946784105 26,894,217 658,043 SH SOLE 0 658,043 0 0