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 36,718 2,247,094 SH   SOLE 0 2,247,094 0 0
AMAZON COM INC COM 023135106 23,502 13,539 SH   SOLE 0 13,539 0 0
AMERICAN INTL GROUP INC *W EXP 01/19/21 026874156 299 21,000 SH   SOLE 0 21,000 0 0
AMERICAN INTL GROUP INC COM NEW 026874784 3,265 58,610 SH   SOLE 0 58,610 0 0
AMERICAN TOWER CORP CL A 03027X100 134,040 606,160 SH   SOLE 0 606,160 0 0
ANTARES PHARMA INC COM 036642106 957 286,097 SH   SOLE 0 286,097 0 0
APPLE INC COM 037833100 20,764 92,707 SH   SOLE 0 92,707 0 0
ATOMERA INC COM 04965B100 741 196,550 SH   SOLE 0 196,550 0 0
AXOS FINL INC COM 05465C100 900 32,540 SH   SOLE 0 32,540 0 0
BANK AMER CORP COM 060505104 37,362 1,280,825 SH   SOLE 0 1,280,825 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 1,871 6 SH   SOLE 0 6 0 0
BERKSHIRE HATHAWAY INC DEL CL B 084670702 24,385 117,223 SH   SOLE 0 117,223 0 0
B O K FINL CORP COM NEW 05561Q201 10,799 136,438 SH   SOLE 0 136,438 0 0
BROOKFIELD INFRAST PARTNERS LP INT UNIT G16252101 7,904 159,317 SH   SOLE 0 159,317 0 0
BROOKFIELD PROPERTY REIT INC CL A 11282X103 623 30,560 SH   SOLE 0 30,560 0 0
CARMAX INC COM 143130102 59,932 681,048 SH   SOLE 0 681,048 0 0
CEDAR FAIR LP DEPOSITRY UNIT 150185106 4,994 85,577 SH   SOLE 0 85,577 0 0
CENTURYLINK INC COM 156700106 484 38,815 SH   SOLE 0 38,815 0 0
CITIGROUP INC COM NEW 172967424 19,625 284,090 SH   SOLE 0 284,090 0 0
CITY OFFICE REIT INC COM 178587101 2,172 150,954 SH   SOLE 0 150,954 0 0
COLONY CAP INC NEW CL A COM 19626G108 869 144,270 SH   SOLE 0 144,270 0 0
COLONY CR REAL ESTATE INC COM CL A 19625T101 214 14,800 SH   SOLE 0 14,800 0 0
COPART INC COM 217204106 21,857 272,092 SH   SOLE 0 272,092 0 0
COVETRUS INC COM 22304C100 2,486 209,080 SH   SOLE 0 209,080 0 0
CROWN HOLDINGS INC COM 228368106 23,521 356,057 SH   SOLE 0 356,057 0 0
CYTOSORBENTS CORP COM NEW 23283X206 758 150,600 SH   SOLE 0 150,600 0 0
DENNYS CORP COM 24869P104 68,401 3,004,643 SH   SOLE 0 3,004,643 0 0
DINE BRANDS GLOBAL INC COM 254423106 2,072 27,320 SH   SOLE 0 27,320 0 0
DOLLAR TREE INC COM 256746108 53,379 467,579 SH   SOLE 0 467,579 0 0
ENERGY RECOVERY INC COM 29270J100 8,640 932,576 SH   SOLE 0 932,576 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 6,359 486,198 SH   SOLE 0 486,198 0 0
ENTERPRISE PRODS PARTNERS LP COM 293792107 3,854 134,838 SH   SOLE 0 134,838 0 0
ENVIVA PARTNERS LP COM UNIT 29414J107 2,815 88,112 SH   SOLE 0 88,112 0 0
EQUINIX COM NEW 29444U700 1,911 3,313 SH   SOLE 0 3,313 0 0
EXXON MOBIL CORP COM 30231G102 204 2,895 SH   SOLE 0 2,895 0 0
FAUQUIER BANKSHARES INC VA COM 312059108 316 16,000 SH   SOLE 0 16,000 0 0
FIVE BELOW INC COM 33829M101 236 1,870 SH   SOLE 0 1,870 0 0
GENERAL ELECTRIC CO COM 369604103 110 12,350 SH   SOLE 0 12,350 0 0
GLADSTONE COML CORP COM 376536108 2,196 93,452 SH   SOLE 0 93,452 0 0
GOOSEHEAD INS INC COM CL A 38267D109 2,662 53,935 SH   SOLE 0 53,935 0 0
SCHEIN HENRY INC COM 806407102 27,559 434,000 SH   SOLE 0 434,000 0 0
INTERNAP CORP COM PAR 45885A409 2,946 1,142,044 SH   SOLE 0 1,142,044 0 0
JPMORGAN CHASE & CO COM 46625H100 232 1,970 SH   SOLE 0 1,970 0 0
KINDER MORGAN INC COM 49456B101 3,669 178,003 SH   SOLE 0 178,003 0 0
LANDMARK INFRASTRUCTURE LP COM UNIT LTD 51508J108 1,330 73,712 SH   SOLE 0 73,712 0 0
MACQUARIE INFRASTR CO LLC MEMBERSHIP INT 55608B105 6,169 156,286 SH   SOLE 0 156,286 0 0
MARKEL CORP COM 570535104 80,872 68,425 SH   SOLE 0 68,425 0 0
MASTERCARD INC CL A 57636Q104 9,958 36,668 SH   SOLE 0 36,668 0 0
MICROSOFT CORP COM 594918104 82,924 596,445 SH   SOLE 0 596,445 0 0
MPLX LP COM UNIT REP LTD 55336V100 6,328 225,905 SH   SOLE 0 225,905 0 0
NEW RESIDENTIAL INVT CORP COM NEW 64828T201 1,342 85,595 SH   SOLE 0 85,595 0 0
NORTHERN OIL & GAS INC NEV COM 665531109 20 10,000 SH   SOLE 0 10,000 0 0
NOVAVAX INC COM 670002104 279 55,600 SH   SOLE 0 55,600 0 0
OPTIMIZERX CORP COM NEW 68401U204 3,245 224,100 SH   SOLE 0 224,100 0 0
O REILLY AUTOMOTIVE INC NEW COM 67103H107 30,792 77,267 SH   SOLE 0 77,267 0 0
PATTERN ENERGY GROUP INC CL A 70338P100 1,667 61,905 SH   SOLE 0 61,905 0 0
PIONEER NAT RES CO COM 723787107 35,580 282,899 SH   SOLE 0 282,899 0 0
PROCTER AND GAMBLE CO COM 742718109 249 2,000 SH   SOLE 0 2,000 0 0
SBA COMMUNICATIONS CORP COM 78410G104 1,543 6,398 SH   SOLE 0 6,398 0 0
SIX FLAGS ENTMT CORP NEW COM 83001A102 444 8,745 SH   SOLE 0 8,745 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 412 2,969 SH   SOLE 0 2,969 0 0
SPROTT PHYSICAL GOLD TRUST UNIT 85207H104 459 38,860 SH   SOLE 0 38,860 0 0
STARWOOD PPTY TR INC COM 85571B105 1,062 43,838 SH   SOLE 0 43,838 0 0
STORE CAP CORP COM 862121100 374 9,990 SH   SOLE 0 9,990 0 0
TRUPANION INC COM 898202106 10,368 407,863 SH   SOLE 0 407,863 0 0
UNIVERSAL DISPLAY CORP COM 91347P105 36,833 219,377 SH   SOLE 0 219,377 0 0
VISA INC COM CL A 92826C839 8,975 52,177 SH   SOLE 0 52,177 0 0
WELLS FARGO & CO NEW COM 949746101 1,342 26,604 SH   SOLE 0 26,604 0 0
ZAYO GROUP HLDGS INC COM 98919V105 3,589 105,878 SH   SOLE 0 105,878 0 0