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
ABBOTT LABS COM 002824100 37 340 SH   SOLE   340 0 0
ALPHABET INC CAP STK CL A 02079K305 400 228 SH   SOLE   228 0 0
ALPHABET INC CAP STK CL C 02079K107 11,391 6,502 SH   SOLE   6,502 0 0
ALTERYX INC COM CL A 02156B103 5,148 42,270 SH   SOLE   42,270 0 0
AVALARA INC COM 05338G106 8,775 53,216 SH   SOLE   53,216 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 696 2 SH   SOLE   2 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 479 2,065 SH   SOLE   2,065 0 0
BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 235 5,700 SH   SOLE   5,700 0 0
BROWN FORMAN CORP CL B 115637209 270 3,400 SH   SOLE   3,400 0 0
CONOCOPHILLIPS COM 20825C104 32 800 SH   SOLE   800 0 0
COUPA SOFTWARE INC COM 22266L106 7,676 22,650 SH   SOLE   22,650 0 0
DARLING INGREDIENTS INC COM 237266101 577 10,000 SH   SOLE   10,000 0 0
DIGIMARC CORP NEW COM 25381B101 21,987 465,435 SH   SOLE   465,435 0 0
ENSTAR GROUP LIMITED SHS G3075P101 9,244 45,117 SH   SOLE   45,117 0 0
EXXON MOBIL CORP COM 30231G102 178 4,325 SH   SOLE   4,325 0 0
HEICO CORP NEW COM 422806109 116 875 SH   SOLE   875 0 0
KEYSIGHT TECHNOLOGIES INC COM 49338L103 281 2,130 SH   SOLE   2,130 0 0
MASTERCARD INCORPORATED CL A 57636Q104 747 2,094 SH   SOLE   2,094 0 0
MICROSOFT CORP COM 594918104 347 1,560 SH   SOLE   1,560 0 0
NATERA INC COM 632307104 9,872 99,200 SH   SOLE   99,200 0 0
NOVO-NORDISK A S ADR 670100205 158 2,255 SH   SOLE   2,255 0 0
PHILLIPS 66 COM 718546104 12 170 SH   SOLE   170 0 0
PTC INC COM 69370C100 14,294 119,509 SH   SOLE   119,509 0 0
RENAISSANCERE HLDGS LTD COM G7496G103 8,165 49,241 SH   SOLE   49,241 0 0
ROYALTY PHARMA PLC SHS CL A G7709Q104 4,849 96,885 SH   SOLE   96,885 0 0
SEATTLE GENETICS INC COM 812578102 10,013 57,170 SH   SOLE   57,170 0 0
SPDR GOLD TR GOLD SHS 78463V107 116 650 SH   SOLE   650 0 0
ST JOE CO COM 790148100 170 4,000 SH   SOLE   4,000 0 0
STEREOTAXIS INC COM NEW 85916J409 397 78,000 SH   SOLE   78,000 0 0
TERADYNE INC COM 880770102 299 2,490 SH   SOLE   2,490 0 0
TEXAS PAC LD TR SUB CTF PROP I T 882610108 18,234 25,081 SH   SOLE   25,081 0 0
TRUPANION INC COM 898202106 15,133 126,418 SH   SOLE   126,418 0 0
UBIQUITI INC COM 90353W103 10,309 37,015 SH   SOLE   37,015 0 0
VOLITIONRX LTD COM 928661107 9,910 2,547,481 SH   SOLE   2,547,481 0 0
XPO LOGISTICS INC COM 983793100 15,137 126,992 SH   SOLE   126,992 0 0