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
AES CORP COM 00130H105 44,666 2,244,545 SH   SOLE 0 2,244,545 0 0
AMAZON COM INC COM 023135106 25,365 13,727 SH   SOLE 0 13,727 0 0
AMERICAN INTL GROUP INC *W EXP 01/19/21 026874156 216 21,000 SH   SOLE 0 21,000 0 0
AMERICAN INTL GROUP INC COM NEW 026874784 2,881 56,135 SH   SOLE 0 56,135 0 0
AMERICAN TOWER CORP CL A 03027X100 139,920 608,826 SH   SOLE 0 608,826 0 0
ANTARES PHARMA INC COM 036642106 1,331 283,097 SH   SOLE 0 283,097 0 0
APPLE INC COM 037833100 27,253 92,808 SH   SOLE 0 92,808 0 0
ATOMERA INC COM 04965B100 696 225,926 SH   SOLE 0 225,926 0 0
AXOS FINL INC COM 05465C100 985 32,540 SH   SOLE 0 32,540 0 0
BANK AMER CORP COM 060505104 45,318 1,286,719 SH   SOLE 0 1,286,719 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 2,038 6 SH   SOLE 0 6 0 0
BERKSHIRE HATHAWAY INC DEL CL B 084670702 27,162 119,922 SH   SOLE 0 119,922 0 0
B O K FINL CORP COM NEW 05561Q201 11,866 135,764 SH   SOLE 0 135,764 0 0
BROOKFIELD INFRAST PARTNERS LP INT UNIT G16252101 7,916 158,348 SH   SOLE 0 158,348 0 0
BROOKFIELD PROPERTY REIT INC CL A 11282X103 669 36,250 SH   SOLE 0 36,250 0 0
CABLE ONE INC COM 12685J105 208 140 SH   SOLE 0 140 0 0
CARMAX INC COM 143130102 59,769 681,746 SH   SOLE 0 681,746 0 0
CEDAR FAIR LP DEPOSITRY UNIT 150185106 4,172 75,257 SH   SOLE 0 75,257 0 0
CENTURYLINK INC COM 156700106 513 38,815 SH   SOLE 0 38,815 0 0
CITIGROUP INC COM NEW 172967424 22,818 285,616 SH   SOLE 0 285,616 0 0
CITY OFFICE REIT INC COM 178587101 1,583 117,109 SH   SOLE 0 117,109 0 0
COLONY CAP INC NEW CL A COM 19626G108 936 197,000 SH   SOLE 0 197,000 0 0
COPART INC COM 217204106 24,703 271,637 SH   SOLE 0 271,637 0 0
COVETRUS INC COM 22304C100 2,077 157,376 SH   SOLE 0 157,376 0 0
CROWN HOLDINGS INC COM 228368106 5,308 73,178 SH   SOLE 0 73,178 0 0
CYTOSORBENTS CORP COM NEW 23283X206 580 150,600 SH   SOLE 0 150,600 0 0
DENNYS CORP COM 24869P104 59,399 2,987,872 SH   SOLE 0 2,987,872 0 0
DINE BRANDS GLOBAL INC COM 254423106 2,257 27,020 SH   SOLE 0 27,020 0 0
DOLLAR TREE INC COM 256746108 44,787 476,205 SH   SOLE 0 476,205 0 0
ENERGY RECOVERY INC COM 29270J100 9,989 1,020,317 SH   SOLE 0 1,020,317 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 6,281 489,553 SH   SOLE 0 489,553 0 0
ENTERPRISE PRODS PARTNERS LP COM 293792107 3,813 135,403 SH   SOLE 0 135,403 0 0
ENVIVA PARTNERS LP COM UNIT 29414J107 3,287 88,112 SH   SOLE 0 88,112 0 0
EQUINIX COM NEW 29444U700 1,934 3,313 SH   SOLE 0 3,313 0 0
EXTENDED STAY AMER INC UNIT 302249200 840 56,515 SH   SOLE 0 56,515 0 0
EXXON MOBIL CORP COM 30231G102 202 2,895 SH   SOLE 0 2,895 0 0
FAUQUIER BANKSHARES INC VA COM 312059108 340 16,000 SH   SOLE 0 16,000 0 0
FIVE BELOW INC COM 33829M101 239 1,870 SH   SOLE 0 1,870 0 0
GENERAL ELECTRIC CO COM 369604103 138 12,350 SH   SOLE 0 12,350 0 0
GLADSTONE COML CORP COM 376536108 2,049 93,727 SH   SOLE 0 93,727 0 0
GOOSEHEAD INS INC COM CL A 38267D109 2,277 53,700 SH   SOLE 0 53,700 0 0
SCHEIN HENRY INC COM 806407102 20,282 303,983 SH   SOLE 0 303,983 0 0
INTERNAP CORP COM PAR 45885A409 447 406,328 SH   SOLE 0 406,328 0 0
JPMORGAN CHASE & CO COM 46625H100 427 3,064 SH   SOLE 0 3,064 0 0
KINDER MORGAN INC COM 49456B101 3,649 172,368 SH   SOLE 0 172,368 0 0
LANDMARK INFRASTRUCTURE LP COM UNIT LTD 51508J108 1,209 73,712 SH   SOLE 0 73,712 0 0
MACQUARIE INFRASTR CO LLC MEMBERSHIP INT 55608B105 6,685 156,041 SH   SOLE 0 156,041 0 0
MARKEL CORP COM 570535104 78,323 68,513 SH   SOLE 0 68,513 0 0
MASTERCARD INC CL A 57636Q104 10,923 36,581 SH   SOLE 0 36,581 0 0
MICROSOFT CORP COM 594918104 93,223 591,139 SH   SOLE 0 591,139 0 0
MPLX LP COM UNIT REP LTD 55336V100 6,094 239,357 SH   SOLE 0 239,357 0 0
NEW RESIDENTIAL INVT CORP COM NEW 64828T201 1,751 108,715 SH   SOLE 0 108,715 0 0
NORTHERN OIL & GAS INC NEV COM 665531109 23 10,000 SH   SOLE 0 10,000 0 0
NOVAVAX INC COM 670002104 420 105,465 SH   SOLE 0 105,465 0 0
OPTIMIZERX CORP COM NEW 68401U204 6,043 588,402 SH   SOLE 0 588,402 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 33,802 77,127 SH   SOLE 0 77,127 0 0
PATTERN ENERGY GROUP INC CL A 70338P100 1,075 40,195 SH   SOLE 0 40,195 0 0
PIONEER NAT RES CO COM 723787107 41,037 271,104 SH   SOLE 0 271,104 0 0
PNC FINL SVCS GROUP INC COM 693475105 202 1,266 SH   SOLE 0 1,266 0 0
PROCTER AND GAMBLE CO COM 742718109 277 2,221 SH   SOLE 0 2,221 0 0
SBA COMMUNICATIONS CORP COM 78410G104 1,542 6,398 SH   SOLE 0 6,398 0 0
SIX FLAGS ENTMT CORP NEW COM 83001A102 394 8,745 SH   SOLE 0 8,745 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 424 2,969 SH   SOLE 0 2,969 0 0
SPROTT PHYSICAL GOLD TRUST UNIT 85207H104 473 38,860 SH   SOLE 0 38,860 0 0
STARWOOD PPTY TR INC COM 85571B105 1,083 43,568 SH   SOLE 0 43,568 0 0
STORE CAP CORP COM 862121100 372 9,990 SH   SOLE 0 9,990 0 0
TRUPANION INC COM 898202106 15,120 403,633 SH   SOLE 0 403,633 0 0
UNIVERSAL DISPLAY CORP COM 91347P105 45,129 219,000 SH   SOLE 0 219,000 0 0
VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 571 1,930 SH   SOLE 0 1,930 0 0
VISA INC COM CL A 92826C839 9,796 52,137 SH   SOLE 0 52,137 0 0
DISNEY WALT CO COM DISNEY 254687106 205 1,420 SH   SOLE 0 1,420 0 0
WELLS FARGO & CO NEW COM 949746101 1,431 26,604 SH   SOLE 0 26,604 0 0
ZAYO GROUP HLDGS INC COM 98919V105 2,642 76,252 SH   SOLE 0 76,252 0 0