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 99 97,173 SH   SOLE   97,173 0 0
ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 970 121,543 SH   SOLE   121,543 0 0
ADVERUM BIOTECHNOLOGIES INC COM 00773U108 8,837 858,000 SH   SOLE   858,000 0 0
ALLEGHENY TECHNOLOGIES INC COM 01741R102 8,207 941,201 SH   SOLE   941,201 0 0
ALPHABET INC CAP STK CL A 02079K305 44,208 30,164 SH   SOLE   30,164 0 0
AMAZON COM INC COM 023135106 11,254 3,574 SH   SOLE   3,574 0 0
ANGI HOMESERVICES INC COM CL A 00183L102 6,922 623,849 SH   SOLE   623,849 0 0
APPLE INC COM 037833100 2,316 20,000 SH Put SOLE   20,000 0 0
APPLE INC COM 037833100 5,883 50,800 SH   SOLE   50,800 0 0
ASA GOLD AND PRECIOUS MTLS L SHS G3156P103 4,842 227,557 SH   SOLE   227,557 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 160,961 503 SH   SOLE   503 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,553 120,000 SH Put SOLE   120,000 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 69,339 325,627 SH   SOLE   325,627 0 0
BIOMARIN PHARMACEUTICAL INC COM 09061G101 2,465 32,406 SH   SOLE   32,406 0 0
BLUEBIRD BIO INC COM 09609G100 636 11,783 SH   SOLE   11,783 0 0
CAPRI HOLDINGS LIMITED SHS G1890L107 2,145 119,179 SH   SOLE   119,179 0 0
CARMAX INC COM 143130102 22,443 244,180 SH   SOLE   244,180 0 0
CARVANA CO CL A 146869102 9,878 44,285 SH   SOLE   44,285 0 0
CELLECTIS S A SPON ADS 15117K103 990 53,506 SH   SOLE   53,506 0 0
CONOCOPHILLIPS COM 20825C104 8,125 247,426 SH   SOLE   247,426 0 0
COSTCO WHSL CORP NEW COM 22160K105 18,864 53,137 SH   SOLE   53,137 0 0
CRISPR THERAPEUTICS AG NAMEN AKT H17182108 1,659 19,840 SH   SOLE   19,840 0 0
DATADOG INC CL A COM 23804L103 9,194 90,000 SH Put SOLE   90,000 0 0
DYNATRACE INC COM NEW 268150109 4,102 100,000 SH Put SOLE   100,000 0 0
EDITAS MEDICINE INC COM 28106W103 849 30,263 SH   SOLE   30,263 0 0
ENTERCOM COMMUNICATIONS CORP CL A 293639100 531 329,694 SH   SOLE   329,694 0 0
EXXON MOBIL CORP COM 30231G102 1,727 50,292 SH   SOLE   50,292 0 0
FIDELITY NATIONAL FINANCIAL FNF GROUP COM 31620R303 15,025 479,883 SH   SOLE   479,883 0 0
FREEPORT-MCMORAN INC CL B 35671D857 10,166 650,000 SH   SOLE   650,000 0 0
HOUGHTON MIFFLIN HARCOURT CO COM 44157R109 8,993 5,198,211 SH   SOLE   5,198,211 0 0
IAC INTERACTIVECORP NEW COM 44891N109 4,791 40,000 SH   SOLE   40,000 0 0
INTELLIA THERAPEUTICS INC COM 45826J105 835 42,018 SH   SOLE   42,018 0 0
KNIGHT SWIFT TRANSN HLDGS IN CL A 499049104 12,210 300,000 SH   SOLE   300,000 0 0
LAMAR ADVERTISING CO NEW CL A 512816109 7,313 110,514 SH   SOLE   110,514 0 0
LAREDO PETROLEUM INC COM 516806205 855 87,205 SH   SOLE   87,205 0 0
MARATHON PETE CORP COM 56585A102 3,945 134,447 SH   SOLE   134,447 0 0
MICRON TECHNOLOGY INC COM 595112103 3,757 80,000 SH Call SOLE   80,000 0 0
MICRON TECHNOLOGY INC COM 595112103 38,965 829,752 SH   SOLE   829,752 0 0
NEW RELIC INC COM 64829B100 5,636 100,000 SH Put SOLE   100,000 0 0
NVIDIA CORPORATION COM 67066G104 10,391 19,200 SH Put SOLE   19,200 0 0
NVIDIA CORPORATION COM 67066G104 20,454 37,792 SH   SOLE   37,792 0 0
PRA GROUP INC COM 69354N106 3,995 100,000 SH   SOLE   100,000 0 0
RANGE RES CORP COM 75281A109 2,273 343,371 SH   SOLE   343,371 0 0
REGENXBIO INC COM 75901B107 12,022 436,828 SH   SOLE   436,828 0 0
RYMAN HOSPITALITY PPTYS INC COM 78377T107 7,225 196,333 SH   SOLE   196,333 0 0
SANDERSON FARMS INC COM 800013104 12,169 103,153 SH   SOLE   103,153 0 0
SANGAMO THERAPEUTICS INC COM 800677106 801 84,811 SH   SOLE   84,811 0 0
SANTANDER CONSUMER USA HDG I COM 80283M101 16,989 934,000 SH   SOLE   934,000 0 0
SAREPTA THERAPEUTICS INC COM 803607100 4,111 29,276 SH   SOLE   29,276 0 0
SCHLUMBERGER LTD COM 806857108 1,421 91,300 SH   SOLE   91,300 0 0
SOUTHWEST AIRLS CO COM 844741108 5,970 159,207 SH   SOLE   159,207 0 0
SPDR GOLD TR GOLD SHS 78463V107 17,712 100,000 SH Put SOLE   100,000 0 0
SPDR GOLD TR GOLD SHS 78463V107 24,372 137,600 SH Call SOLE   137,600 0 0
SPDR GOLD TR GOLD SHS 78463V107 155,890 880,136 SH   SOLE   880,136 0 0
TJX COS INC NEW COM 872540109 16,266 292,294 SH   SOLE   292,294 0 0
TWITTER INC COM 90184L102 6,675 150,000 SH Put SOLE   150,000 0 0
TWITTER INC COM 90184L102 36,058 810,292 SH   SOLE   810,292 0 0
UBER TECHNOLOGIES INC COM 90353T100 730 20,000 SH Call SOLE   20,000 0 0
UBER TECHNOLOGIES INC COM 90353T100 7,661 210,000 SH   SOLE   210,000 0 0
ULTRAGENYX PHARMACEUTICAL IN COM 90400D108 1,372 16,692 SH   SOLE   16,692 0 0
WALMART INC COM 931142103 11,253 80,431 SH   SOLE   80,431 0 0
WAVE LIFE SCIENCES LTD SHS Y95308105 380 44,816 SH   SOLE   44,816 0 0
WELLS FARGO CO NEW COM 949746101 5,463 232,373 SH   SOLE   232,373 0 0