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 270 119,493 SH   SOLE   119,493 0 0
ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 226 149,507 SH   SOLE   149,507 0 0
ADVERUM BIOTECHNOLOGIES INC COM 00773U108 3,137 575,645 SH   SOLE   575,645 0 0
ALIBABA GROUP HLDG LTD SPONSORED ADS 01609W102 9,766 58,400 SH   SOLE   58,400 0 0
ALIBABA GROUP HLDG LTD SPONSORED ADS 01609W102 16,723 100,000 SH Call SOLE   100,000 0 0
ALIBABA GROUP HLDG LTD SPONSORED ADS 01609W102 20,068 120,000 SH Put SOLE   120,000 0 0
ALLEGHENY TECHNOLOGIES INC COM 01741R102 34,365 1,697,050 SH   SOLE   1,697,050 0 0
ALPHABET INC CAP STK CL A 02079K305 91,419 74,864 SH   SOLE   74,864 0 0
AMAZON COM INC COM 023135106 7,145 4,116 SH   SOLE   4,116 0 0
APPLE INC COM 037833100 20,508 91,565 SH   SOLE   91,565 0 0
APPLE INC COM 037833100 55,993 250,000 SH Put SOLE   250,000 0 0
ASA GOLD AND PRECIOUS MTLS L SHS G3156P103 6,042 502,673 SH   SOLE   502,673 0 0
AUDENTES THERAPEUTICS INC COM 05070R104 3,326 118,421 SH   SOLE   118,421 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 306,531 983 SH   SOLE   983 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,421 189,508 SH   SOLE   189,508 0 0
BIOMARIN PHARMACEUTICAL INC COM 09061G101 2,709 40,196 SH   SOLE   40,196 0 0
BLACK KNIGHT INC COM 09215C105 4,694 76,876 SH   SOLE   76,876 0 0
BLUEBIRD BIO INC COM 09609G100 1,332 14,507 SH   SOLE   14,507 0 0
CAPRI HOLDINGS LIMITED SHS G1890L107 5,641 170,108 SH   SOLE   170,108 0 0
CARMAX INC COM 143130102 28,240 320,912 SH   SOLE   320,912 0 0
CARVANA CO CL A 146869102 3,300 50,000 SH Put SOLE   50,000 0 0
CARVANA CO CL A 146869102 45,347 687,078 SH   SOLE   687,078 0 0
CELLECTIS S A SPONSORED ADS 15117K103 685 65,861 SH   SOLE   65,861 0 0
CONOCOPHILLIPS COM 20825C104 12,225 214,553 SH   SOLE   214,553 0 0
COSTCO WHSL CORP NEW COM 22160K105 18,039 62,613 SH   SOLE   62,613 0 0
CRISPR THERAPEUTICS AG NAMEN AKT H17182108 1,001 24,420 SH   SOLE   24,420 0 0
DELTA AIR LINES INC DEL COM NEW 247361702 11,910 206,778 SH   SOLE   206,778 0 0
DEXCOM INC COM 252131107 7,462 50,000 SH Call SOLE   50,000 0 0
EDITAS MEDICINE INC COM 28106W103 847 37,259 SH   SOLE   37,259 0 0
ENTERCOM COMMUNICATIONS CORP CL A 293639100 1,305 390,815 SH   SOLE   390,815 0 0
EXXON MOBIL CORP COM 30231G102 4,251 60,201 SH   SOLE   60,201 0 0
FIDELITY NATIONAL FINANCIAL FNF GROUP COM 31620R303 981 22,100 SH   SOLE   22,100 0 0
G-III APPAREL GROUP LTD COM 36237H101 7,329 284,390 SH   SOLE   284,390 0 0
GUIDEWIRE SOFTWARE INC COM 40171V100 5,269 50,000 SH Put SOLE   50,000 0 0
HOUGHTON MIFFLIN HARCOURT CO COM 44157R109 36,739 6,892,785 SH   SOLE   6,892,785 0 0
INTELLIA THERAPEUTICS INC COM 45826J105 690 51,700 SH   SOLE   51,700 0 0
INVESCO QQQ TR UNIT SER 1 46090E103 19,542 103,500 SH Put SOLE   103,500 0 0
KNIGHT SWIFT TRANSN HLDGS IN CL A 499049104 6,460 177,960 SH   SOLE   177,960 0 0
LAMAR ADVERTISING CO NEW CL A 512816109 13,224 161,403 SH   SOLE   161,403 0 0
LAREDO PETROLEUM INC COM 516806106 5,063 2,100,943 SH   SOLE   2,100,943 0 0
MARATHON PETE CORP COM 56585A102 10,171 167,428 SH   SOLE   167,428 0 0
MICRON TECHNOLOGY INC COM 595112103 4,285 100,000 SH Put SOLE   100,000 0 0
MICRON TECHNOLOGY INC COM 595112103 52,264 1,219,704 SH   SOLE   1,219,704 0 0
NVIDIA CORP COM 67066G104 8,070 46,358 SH   SOLE   46,358 0 0
PRA GROUP INC COM 69354N106 8,260 244,447 SH   SOLE   244,447 0 0
RANGE RES CORP COM 75281A109 5,833 1,526,936 SH   SOLE   1,526,936 0 0
REGENXBIO INC COM 75901B107 34,104 957,965 SH   SOLE   957,965 0 0
RYMAN HOSPITALITY PPTYS INC COM 78377T107 37,579 459,341 SH   SOLE   459,341 0 0
SANGAMO THERAPEUTICS INC COM 800677106 944 104,288 SH   SOLE   104,288 0 0
SAREPTA THERAPEUTICS INC COM 803607100 5,047 67,002 SH   SOLE   67,002 0 0
SCHLUMBERGER LTD COM 806857108 3,939 115,265 SH   SOLE   115,265 0 0
SOUTHWEST AIRLS CO COM 844741108 48,040 889,470 SH   SOLE   889,470 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 4,166 30,000 SH Call SOLE   30,000 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 105,797 761,840 SH   SOLE   761,840 0 0
TJX COS INC NEW COM 872540109 18,896 339,002 SH   SOLE   339,002 0 0
ULTRAGENYX PHARMACEUTICAL IN COM 90400D108 879 20,553 SH   SOLE   20,553 0 0
UNION PACIFIC CORP COM 907818108 8,099 50,000 SH Put SOLE   50,000 0 0
URBAN OUTFITTERS INC COM 917047102 7,496 266,844 SH   SOLE   266,844 0 0
WALMART INC COM 931142103 11,640 98,077 SH   SOLE   98,077 0 0
WAVE LIFE SCIENCES LTD SHS Y95308105 1,137 55,376 SH   SOLE   55,376 0 0
WELLS FARGO CO NEW COM 949746101 31,865 631,741 SH   SOLE   631,741 0 0
YELP INC CL A 985817105 3,475 100,000 SH Put SOLE   100,000 0 0
ZILLOW GROUP INC CL C CAP STK 98954M200 9,627 322,845 SH   SOLE   322,845 0 0