The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete. | |||||||||||||||||
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F INFORMATION TABLE |
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| 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 |
| INSMED INC | NOTE 1.750% 1/1 | 457669AA7 | 968 | 1,000,000 | SH | SOLE | 1,000,000 | 0 | 0 | ||
| ALIBABA GROUP HLDG LTD | SPONSORE ADS | 01609W102 | 3,224 | 15,200 | SH | SOLE | 15,200 | 0 | 0 | ||
| BAIDU INC | SPON REP A | 056752108 | 8,091 | 64,013 | SH | SOLE | 64,013 | 0 | 0 | ||
| AIR TRANSPORT SERVICES GROUP | COM | 00922R105 | 15,103 | 643,769 | SH | SOLE | 643,769 | 0 | 0 | ||
| ALPHABET INC | CAP STK CL A | 02079K305 | 20,132 | 15,031 | SH | SOLE | 15,031 | 0 | 0 | ||
| BERKSHIRE HATHAWAY | CL B NEW | 084670702 | 7,076 | 31,239 | SH | SOLE | 31,239 | 0 | 0 | ||
| CHROMADEX CORP | COM NEW | 171077407 | 1,358 | 315,025 | SH | SOLE | 315,025 | 0 | 0 | ||
| DAVITA HEALTHCARE PARTNERS I | COM | 23918K108 | 3,657 | 48,741 | SH | SOLE | 48,741 | 0 | 0 | ||
| GCI LIBERTY INC | CLASS A | 36164V305 | 1,507 | 21,276 | SH | SOLE | 21,276 | 0 | 0 | ||
| INSMED INC | COM PAR $.01 | 457669307 | 778 | 32,597 | SH | SOLE | 32,597 | 0 | 0 | ||
| INTERACTIVE BROKERS GROUO IN | COM CL A | 45841N107 | 11,481 | 246,275 | SH | SOLE | 246,275 | 0 | 0 | ||
| NELNET INC | CL A | 64031N108 | 22,792 | 391,347 | SH | SOLE | 391,347 | 0 | 0 | ||
| PAYPAL HOLDINGS INC | COM | 70450Y103 | 10,610 | 98,082 | SH | SOLE | 98,082 | 0 | 0 | ||
| PROGRESSIVE CORP OHIO | COM | 743315103 | 9,193 | 126,994 | SH | SOLE | 126,994 | 0 | 0 | ||
| STARS GROUP INC | COM | 85570W100 | 9,354 | 358,523 | SH | SOLE | 358,523 | 0 | 0 | ||