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 239 113,799 SH   SOLE   113,799 0 0
ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 387 142,374 SH   SOLE   142,374 0 0
ADVERUM BIOTECHNOLOGIES INC COM 00773U108 7,982 816,945 SH   SOLE   816,945 0 0
ALIBABA GROUP HLDG LTD SPONSORED ADS 01609W102 10,210 52,500 SH   SOLE   52,500 0 0
ALLEGHENY TECHNOLOGIES INC COM 01741R102 11,637 1,369,050 SH   SOLE   1,369,050 0 0
ALPHABET INC CAP STK CL A 02079K305 40,717 35,042 SH   SOLE   35,042 0 0
AMAZON COM INC COM 023135106 17,969 9,216 SH   SOLE   9,216 0 0
AMAZON COM INC COM 023135106 19,497 10,000 SH Call SOLE   10,000 0 0
AMAZON COM INC COM 023135106 48,743 25,000 SH Put SOLE   25,000 0 0
ANGI HOMESERVICES INC COM CL A 00183L102 2,625 500,000 SH   SOLE   500,000 0 0
APPLE INC COM 037833100 13,424 52,789 SH   SOLE   52,789 0 0
ASA GOLD AND PRECIOUS MTLS L SHS G3156P103 4,311 418,173 SH   SOLE   418,173 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 189,856 698 SH   SOLE   698 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,955 81,800 SH Call SOLE   81,800 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,872 141,511 SH   SOLE   141,511 0 0
BIOMARIN PHARMACEUTICAL INC COM 09061G101 3,229 38,209 SH   SOLE   38,209 0 0
BLUEBIRD BIO INC COM 09609G100 635 13,812 SH   SOLE   13,812 0 0
CAPRI HOLDINGS LIMITED SHS G1890L107 1,512 140,108 SH   SOLE   140,108 0 0
CARGURUS INC COM CL A 141788109 373 19,700 SH   SOLE   19,700 0 0
CARMAX INC COM 143130102 12,746 236,777 SH   SOLE   236,777 0 0
CARVANA CO CL A 146869102 3,002 54,500 SH Call SOLE   54,500 0 0
CARVANA CO CL A 146869102 14,735 267,477 SH   SOLE   267,477 0 0
CELLECTIS S A SPONSORED ADS 15117K103 577 62,709 SH   SOLE   62,709 0 0
CHIPOTLE MEXICAN GRILL INC COM 169656105 6,544 10,000 SH   SOLE   10,000 0 0
CONOCOPHILLIPS COM 20825C104 5,398 175,273 SH   SOLE   175,273 0 0
COSTCO WHSL CORP NEW COM 22160K105 17,853 62,613 SH   SOLE   62,613 0 0
CRISPR THERAPEUTICS AG NAMEN AKT H17182108 986 23,252 SH   SOLE   23,252 0 0
DELTA AIR LINES INC DEL COM NEW 247361702 8,274 290,014 SH   SOLE   290,014 0 0
EDITAS MEDICINE INC COM 28106W103 703 35,474 SH   SOLE   35,474 0 0
ENTERCOM COMMUNICATIONS CORP CL A 293639100 668 390,815 SH   SOLE   390,815 0 0
EXXON MOBIL CORP COM 30231G102 2,286 60,201 SH   SOLE   60,201 0 0
HILL ROM HLDGS INC COM 431475102 1,700 16,900 SH   SOLE   16,900 0 0
HOUGHTON MIFFLIN HARCOURT CO COM 44157R109 11,093 5,900,437 SH   SOLE   5,900,437 0 0
INTELLIA THERAPEUTICS INC COM 45826J105 602 49,230 SH   SOLE   49,230 0 0
INVESCO QQQ TR UNIT SER 1 46090E103 13,328 70,000 SH Call SOLE   70,000 0 0
INVESCO QQQ TR UNIT SER 1 46090E103 51,136 268,571 SH   SOLE   268,571 0 0
KNIGHT SWIFT TRANSN HLDGS IN CL A 499049104 5,523 168,371 SH   SOLE   168,371 0 0
LAMAR ADVERTISING CO NEW CL A 512816109 6,028 117,553 SH   SOLE   117,553 0 0
LAREDO PETROLEUM INC COM 516806106 779 2,050,943 SH   SOLE   2,050,943 0 0
MARATHON PETE CORP COM 56585A102 3,793 160,583 SH   SOLE   160,583 0 0
MICRON TECHNOLOGY INC COM 595112103 18,927 450,000 SH Call SOLE   450,000 0 0
MICRON TECHNOLOGY INC COM 595112103 29,586 703,435 SH   SOLE   703,435 0 0
NVIDIA CORP COM 67066G104 11,671 44,275 SH   SOLE   44,275 0 0
PRA GROUP INC COM 69354N106 5,958 214,933 SH   SOLE   214,933 0 0
RANGE RES CORP COM 75281A109 2,034 891,936 SH   SOLE   891,936 0 0
REGENERON PHARMACEUTICALS COM 75886F107 14,649 30,000 SH Put SOLE   30,000 0 0
REGENXBIO INC COM 75901B107 20,586 635,761 SH   SOLE   635,761 0 0
RYMAN HOSPITALITY PPTYS INC COM 78377T107 14,739 411,133 SH   SOLE   411,133 0 0
SANGAMO THERAPEUTICS INC COM 800677106 633 99,320 SH   SOLE   99,320 0 0
SAREPTA THERAPEUTICS INC COM 803607100 5,869 60,002 SH   SOLE   60,002 0 0
SCHLUMBERGER LTD COM 806857108 1,457 107,998 SH   SOLE   107,998 0 0
SOUTHWEST AIRLS CO COM 844741108 25,292 710,252 SH   SOLE   710,252 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 31,475 212,600 SH Call SOLE   212,600 0 0
SPDR GOLD TRUST GOLD SHS 78463V107 92,814 626,913 SH   SOLE   626,913 0 0
TESLA INC COM 88160R101 7,912 15,100 SH Call SOLE   15,100 0 0
TJX COS INC NEW COM 872540109 13,064 273,245 SH   SOLE   273,245 0 0
TWITTER INC COM 90184L102 1,228 50,000 SH Call SOLE   50,000 0 0
TWITTER INC COM 90184L102 8,596 350,000 SH   SOLE   350,000 0 0
UBER TECHNOLOGIES INC COM 90353T100 2,792 100,000 SH   SOLE   100,000 0 0
UBER TECHNOLOGIES INC COM 90353T100 3,630 130,000 SH Call SOLE   130,000 0 0
ULTRAGENYX PHARMACEUTICAL IN COM 90400D108 869 19,568 SH   SOLE   19,568 0 0
URBAN OUTFITTERS INC COM 917047102 1,389 97,544 SH   SOLE   97,544 0 0
WALMART INC COM 931142103 10,724 94,382 SH   SOLE   94,382 0 0
WAVE LIFE SCIENCES LTD SHS Y95308105 494 52,682 SH   SOLE   52,682 0 0
WELLS FARGO CO NEW COM 949746101 7,749 270,000 SH   SOLE   270,000 0 0