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
ABEONA THERAPEUTICS INC COM 00289Y107 283 97,173 SH   SOLE   97,173 0 0
ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 1,217 121,543 SH   SOLE   121,543 0 0
ADVERUM BIOTECHNOLOGIES INC COM 00773U108 14,679 703,000 SH   SOLE   703,000 0 0
ALLEGHENY TECHNOLOGIES INC COM 01741R102 9,591 941,201 SH   SOLE   941,201 0 0
ALPHABET INC CAP STK CL A 02079K305 42,774 30,164 SH   SOLE   30,164 0 0
AMAZON COM INC COM 023135106 14,876 5,392 SH   SOLE   5,392 0 0
ANGI HOMESERVICES INC COM CL A 00183L102 7,580 623,849 SH   SOLE   623,849 0 0
ASA GOLD AND PRECIOUS MTLS L SHS G3156P103 3,987 227,557 SH   SOLE   227,557 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 134,452 503 SH   SOLE   503 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 85,236 477,486 SH   SOLE   477,486 0 0
BIOMARIN PHARMACEUTICAL INC COM 09061G101 3,997 32,406 SH   SOLE   32,406 0 0
BLUEBIRD BIO INC COM 09609G100 719 11,783 SH   SOLE   11,783 0 0
CAPRI HOLDINGS LIMITED SHS G1890L107 1,863 119,179 SH   SOLE   119,179 0 0
CARMAX INC COM 143130102 16,046 179,180 SH   SOLE   179,180 0 0
CARVANA CO CL A 146869102 9,207 76,600 SH Put SOLE   76,600 0 0
CARVANA CO CL A 146869102 9,478 78,853 SH   SOLE   78,853 0 0
CELLECTIS S A SPON ADS 15117K103 952 53,506 SH   SOLE   53,506 0 0
CONOCOPHILLIPS COM 20825C104 12,078 287,426 SH   SOLE   287,426 0 0
COSTCO WHSL CORP NEW COM 22160K105 16,112 53,137 SH   SOLE   53,137 0 0
CRISPR THERAPEUTICS AG NAMEN AKT H17182108 1,458 19,840 SH   SOLE   19,840 0 0
EDITAS MEDICINE INC COM 28106W103 895 30,263 SH   SOLE   30,263 0 0
ENTERCOM COMMUNICATIONS CORP CL A 293639100 455 329,694 SH   SOLE   329,694 0 0
EXXON MOBIL CORP COM 30231G102 2,249 50,292 SH   SOLE   50,292 0 0
FIDELITY NATIONAL FINANCIAL FNF GROUP COM 31620R303 13,180 429,883 SH   SOLE   429,883 0 0
HOUGHTON MIFFLIN HARCOURT CO COM 44157R109 10,890 6,016,377 SH   SOLE   6,016,377 0 0
INTELLIA THERAPEUTICS INC COM 45826J105 883 42,018 SH   SOLE   42,018 0 0
INVESCO QQQ TR UNIT SER 1 46090E103 42,562 171,900 SH Put SOLE   171,900 0 0
KNIGHT SWIFT TRANSN HLDGS IN CL A 499049104 5,999 143,824 SH   SOLE   143,824 0 0
LAMAR ADVERTISING CO NEW CL A 512816109 7,378 110,514 SH   SOLE   110,514 0 0
LAREDO PETROLEUM INC COM 516806205 1,209 87,205 SH   SOLE   87,205 0 0
MARATHON PETE CORP COM 56585A102 5,026 134,447 SH   SOLE   134,447 0 0
MICRON TECHNOLOGY INC COM 595112103 5,152 100,000 SH Call SOLE   100,000 0 0
MICRON TECHNOLOGY INC COM 595112103 12,071 234,300 SH Put SOLE   234,300 0 0
MICRON TECHNOLOGY INC COM 595112103 47,576 923,452 SH   SOLE   923,452 0 0
NVIDIA CORPORATION COM 67066G104 14,358 37,792 SH   SOLE   37,792 0 0
PRA GROUP INC COM 69354N106 4,986 128,980 SH   SOLE   128,980 0 0
RANGE RES CORP COM 75281A109 2,384 423,371 SH   SOLE   423,371 0 0
REGENXBIO INC COM 75901B107 16,088 436,828 SH   SOLE   436,828 0 0
RYMAN HOSPITALITY PPTYS INC COM 78377T107 6,793 196,333 SH   SOLE   196,333 0 0
SANDERSON FARMS INC COM 800013104 10,796 93,153 SH   SOLE   93,153 0 0
SANGAMO THERAPEUTICS INC COM 800677106 760 84,811 SH   SOLE   84,811 0 0
SANTANDER CONSUMER USA HDG I COM 80283M101 12,924 702,000 SH   SOLE   702,000 0 0
SAREPTA THERAPEUTICS INC COM 803607100 6,618 41,276 SH   SOLE   41,276 0 0
SCHLUMBERGER LTD COM 806857108 1,679 91,300 SH   SOLE   91,300 0 0
SOUTHWEST AIRLS CO COM 844741108 5,442 159,207 SH   SOLE   159,207 0 0
SPDR GOLD TR GOLD SHS 78463V107 14,377 85,900 SH Put SOLE   85,900 0 0
SPDR GOLD TR GOLD SHS 78463V107 23,030 137,600 SH Call SOLE   137,600 0 0
SPDR GOLD TR GOLD SHS 78463V107 105,466 630,136 SH   SOLE   630,136 0 0
TJX COS INC NEW COM 872540109 14,778 292,294 SH   SOLE   292,294 0 0
TWITTER INC COM 90184L102 14,308 480,292 SH   SOLE   480,292 0 0
UBER TECHNOLOGIES INC COM 90353T100 1,338 43,046 SH   SOLE   43,046 0 0
ULTRAGENYX PHARMACEUTICAL IN COM 90400D108 1,306 16,692 SH   SOLE   16,692 0 0
WALMART INC COM 931142103 9,634 80,431 SH   SOLE   80,431 0 0
WAVE LIFE SCIENCES LTD SHS Y95308105 467 44,816 SH   SOLE   44,816 0 0
WELLS FARGO CO NEW COM 949746101 5,949 232,373 SH   SOLE   232,373 0 0