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
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,815 43,172 SH   SOLE   43,172 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,056 5,170 SH   OTR   0 0 5,170
BRIGHTCOVE INC COM 10921T101 16,669 2,367,803 SH   SOLE   2,367,803 0 0
BRIGHTCOVE INC COM 10921T101 7,443 1,057,283 SH   OTR   0 0 1,057,283
CECO ENVIRONMENTAL CORP COM 125141101 21,800 3,229,584 SH   SOLE   3,229,584 0 0
CECO ENVIRONMENTAL CORP COM 125141101 9,503 1,407,914 SH   OTR   0 0 1,407,914
DOLBY LABORATORIES INC COM 25659T107 10,139 163,953 SH   SOLE   163,953 0 0
DOLBY LABORATORIES INC COM 25659T107 4,461 72,134 SH   OTR   0 0 72,134
ENERGY RECOVERY INC COM 29270J100 13,165 1,956,150 SH   SOLE   1,956,150 0 0
ENERGY RECOVERY INC COM 29270J100 5,974 887,652 SH   OTR   0 0 887,652
ENTEGRIS INC COM 29362U104 10,300 369,235 SH   SOLE   369,235 0 0
ENTEGRIS INC COM 29362U104 4,877 174,826 SH   OTR   0 0 174,826
FARMER BROS CO COM 307675108 27,852 1,193,811 SH   SOLE   1,193,811 0 0
FARMER BROS CO COM 307675108 12,502 535,874 SH   OTR   0 0 535,874
GENTHERM INC COM 37253A103 31,561 789,411 SH   SOLE   789,411 0 0
GENTHERM INC COM 37253A103 14,073 352,002 SH   OTR   0 0 352,002
HACKETT GROUP INC COM 404609109 17,753 1,108,878 SH   SOLE   1,108,878 0 0
HACKETT GROUP INC COM 404609109 7,989 498,975 SH   OTR   0 0 498,975
INTEGRATED DEVICE TECHNOLOGY COM 458118106 7,683 158,638 SH   SOLE   158,638 0 0
INTEGRATED DEVICE TECHNOLOGY COM 458118106 325 6,712 SH   OTR   0 0 6,712
MODEL N INC COM 607525102 18,039 1,363,466 SH   SOLE   1,363,466 0 0
MODEL N INC COM 607525102 8,114 613,313 SH   OTR   0 0 613,313
MONOTYPE IMAGING HOLDINGS IN COM 61022P100 39,171 2,523,929 SH   SOLE   2,523,929 0 0
MONOTYPE IMAGING HOLDINGS IN COM 61022P100 17,700 1,140,496 SH   OTR   0 0 1,140,496
PANHANDLE OIL AND GAS INC CL A 698477106 23,580 1,521,289 SH   SOLE   1,521,289 0 0
PANHANDLE OIL AND GAS INC CL A 698477106 10,134 653,780 SH   OTR   0 0 653,780
PURECYCLE CORP COM NEW 746228303 12,423 1,251,048 SH   SOLE   1,251,048 0 0
PURECYCLE CORP COM NEW 746228303 5,515 555,415 SH   OTR   0 0 555,415
QUANTENNA COMMUNICATIONS INC COM 74766D100 14,740 1,027,154 SH   SOLE   1,027,154 0 0
QUANTENNA COMMUNICATIONS INC COM 74766D100 6,606 460,332 SH   OTR   0 0 460,332
SIERRA WIRELESS INC COM 826516106 16,350 1,217,437 SH   SOLE   1,217,437 0 0
SIERRA WIRELESS INC COM 826516106 7,473 556,424 SH   OTR   0 0 556,424
SURMODICS INC COM 868873100 25,838 546,728 SH   SOLE   546,728 0 0
SURMODICS INC COM 868873100 11,743 248,474 SH   OTR   0 0 248,474
TPI COMPOSITES INC COM 87266J104 32,064 1,304,483 SH   SOLE   1,304,483 0 0
TPI COMPOSITES INC COM 87266J104 14,461 588,335 SH   OTR   0 0 588,335
TECHTARGET INC COM 87874R100 2,760 226,075 SH   SOLE   226,075 0 0
TECHTARGET INC COM 87874R100 1,163 95,241 SH   OTR   0 0 95,241
VISTEON CORP COM 92839U206 13,820 229,259 SH   SOLE   229,259 0 0
VISTEON CORP COM 92839U906 6,253 103,734 SH   OTR   0 0 103,734
XPERI CORP COM 98421B100 11,937 649,081 SH   SOLE   649,081 0 0
XPERI CORP COM 98421B100 4,899 266,421 SH   OTR   0 0 266,421