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
Aspen Aerogels Common 04523Y105 14,095 3,167,322 SH   SOLE n/a 3,167,322 0 0
BOK Financial Common 05561Q201 180,120 2,140,978 SH   SOLE n/a 2,140,978 0 0
Allergan PLC Common G0177J108 1,307 5,378 SH   OTR n/a 0 0 5,378
Berkshire Hathaway Inc. CL B Common 084670702 2,785 16,443 SH   OTR n/a 0 0 16,443
Calpine Corporation Common 131347304 1,260 93,118 SH   OTR n/a 0 0 93,118
Cimpress N.V. Common N20146101 1,567 16,573 SH   OTR n/a 0 0 16,573
Commerce Hub Inc. Common 20084V306 613 35,169 SH   OTR n/a 0 0 35,169
Costco Wholesale Corp Common 22160K105 709 4,434 SH   OTR n/a 0 0 4,434
JPMorgan Chase & Co Common 46625H100 3,204 35,056 SH   OTR n/a 0 0 35,056
Liberty Broadband Corp Common 530307305 3,171 36,557 SH   OTR n/a 0 0 36,557
Liberty Global - Series C Common G5480U120 1,308 41,936 SH   OTR n/a 0 0 41,936
Liberty Global Lilac Series A Common G5480U138 519 23,860 SH   OTR n/a 0 0 23,860
Liberty Interactive Corporation QVC Group Ser A Common 53071M104 1,531 62,400 SH   OTR n/a 0 0 62,400
Liberty Media Corp Series C Sirius XM Group Common 531229607 1,294 31,038 SH   OTR n/a 0 0 31,038
Moodys Corp Common 615369105 1,117 9,181 SH   OTR n/a 0 0 9,181
Microsoft Corp Common 594918104 1,894 27,481 SH   OTR n/a 0 0 27,481
S&P Global Inc. Common 78409V104 1,485 10,170 SH   OTR n/a 0 0 10,170