OWNERSHIP PROFILE

SHAREHOLDER BREAKDOWN

Shareholder Holders Value ($MM) % O/S Shares
Institution 54 113.21 83.20 13,027,928
Mutual Fund 55 17.57 15.24 2,386,077
Insider 4 4.25 3.01 470,963

INSTITUTIONAL SHAREHOLDER ROTATION

Shareholder Holders Value Chg ($MM) % O/S Share Change
Buyers 16 3.80 3.60 563,134
Sellers 27 -10.18 9.59 -1,501,776
Net -- -6.38 5.99 -938,642

INSTITUTIONAL SHAREHOLDER CONCENTRATION

Value ($MM) % O/S Shares
Total Inst. 113.21 83.20 13,027,928
Top 10 Inst. 98.22 69.40 10,867,026
Top 20 Inst. 109.40 79.69 12,479,028
Top 50 Inst. 113.21 83.19 13,027,101

INSTITUTIONAL SHAREHOLDER STYLE

Holders Value ($MM) % Inst Shares Shares
Growth 11 11.70 11.07 1,733,845
Aggressive Growth 4 4.19 3.97 621,401
Core Growth 7 7.51 7.10 1,112,444
Income 2 0.21 0.20 30,899
Income Value 2 0.21 0.20 30,899
Index 8 7.50 6.16 964,497
Other 15 74.48 48.66 7,619,223
Broker Dealer 3 0.09 0.08 13,273
GARP 3 4.45 4.21 658,600
Hedge Fund 8 60.05 38.29 5,996,629
VC/Private Equi 1 9.89 6.07 950,721
Value 10 14.03 13.41 2,100,620
Core Value 6 10.90 10.45 1,635,870
Deep Value 4 3.14 2.97 464,750

TOP HOLDERS: INSTITUTIONAL INVESTOR

Holder Shares Held % O/S Share Change Filing Date
Grace Brothers Management, LLC 5,363,073 34.25 -- 5/29/18
Dimensional Fund Advisors, L.P. 1,060,836 6.77 10,628 12/31/18
NGP Energy Technology Partners, L.P. 950,721 6.07 -- 5/29/18
Eliot Rose Asset Management, L.L.C. 727,090 4.64 -502,625 12/31/17
Wellington Management Company, LLP 642,427 4.10 -- 12/31/18
Thomson Horstmann & Bryant, Inc. 635,400 4.06 46,587 12/31/18
The Vanguard Group, Inc. 444,652 2.84 953 12/31/18
Franklin Mutual Advisers, LLC 426,600 2.72 426,600 12/31/18
Global X Management Company LLC 345,939 2.21 -17,906 6/30/18
Popielec (Michael D) 270,288 1.73 -- 5/29/18
Renaissance Technologies LLC 266,000 1.70 7,900 12/31/18
NorthPointe Capital, LLC 232,823 1.49 -101,221 12/31/18
Monashee Investment Management, LLC 223,155 1.43 -26,845 12/31/18
Mirae Asset Global Investments (USA) LLC 214,515 1.37 -102,996 12/31/18
Bridgeway Capital Management, Inc. 177,000 1.13 -25,000 12/31/18
Essex Investment Management Company, LLC 170,586 1.09 -11,431 12/31/18
Fain (Philip A) 92,229 0.59 22,229 12/28/18
Algert Global LLC 85,089 0.54 -38,645 12/31/18
Singh (Ranjit C) 79,801 0.51 -- 5/29/18
Geode Capital Management, L.L.C. 70,804 0.45 -- 12/31/18
Saeli (Thomas Louis) 60,446 0.39 2,000 11/14/18
Teton Advisors, Inc. 59,300 0.38 34,300 12/31/18
Shaw (Robert W II) 52,000 0.33 2,000 12/14/18
Manatuck Hill Partners, LLC 48,299 0.31 -92,502 12/31/18
Acadian Asset Management LLC 36,011 0.23 -- 12/31/18
BlackRock Institutional Trust Company, N.A. 32,674 0.21 45 12/31/18
California Public Employees' Retirement System 31,400 0.20 -- 12/31/18
Shikiar Asset Management, Inc. 26,000 0.17 -- 12/31/18
Deutsche Asset Management Americas 25,600 0.16 -1,000 12/31/18
Northern Trust Investments, Inc. 25,277 0.16 -300 12/31/18
Alambic Investment Management, L.P. 20,899 0.13 20,899 12/31/18
Anderson (Steven Mark) 18,500 0.12 -- 5/29/18
Carosa Stanton Asset Management, LLC 17,400 0.11 -- 10/31/18
O'Shaughnessy Asset Management, LLC 11,469 0.07 -2,818 12/31/18
Barclays Capital Inc. 11,433 0.07 6,923 12/31/18
State Street Global Advisors (US) 10,116 0.06 -342 12/31/18
Saturna Capital Corporation 10,000 0.06 -- 12/31/18
Morgan Stanley Wealth Management 8,652 0.06 244 12/31/18
T. Rowe Price Associates, Inc. 5,800 0.04 -- 12/31/18
Guggenheim Investments 5,591 0.04 33 7/31/17
Prelude Capital Management, LLC 5,349 0.03 3,470 12/31/18
Tower Research Capital LLC 5,264 0.03 4,147 12/31/18
Vericimetry Advisors LLC 5,000 0.03 -4,900 9/30/18
Dimensional Fund Advisors, Ltd. 3,705 0.02 -- 12/31/18
Invesco Capital Management LLC 3,635 0.02 -5,333 12/31/18
Northern Trust Global Investments 1,982 0.01 -300 12/31/18
AXA Rosenberg Investment Management LLC 1,939 0.01 189 12/31/18
BlackRock Investment Management, LLC 1,939 0.01 189 12/31/18
Morgan Stanley & Co. LLC 1,813 0.01 -118 12/31/18
Capital Advisors, Ltd., LLC 580 -- -- 12/31/18

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* Insider values reflect direct beneficial ownership.