OWNERSHIP PROFILE

SHAREHOLDER BREAKDOWN

Shareholder Holders Value ($MM) % O/S Shares
Institution 60 127.08 80.91 12,901,686
Mutual Fund 55 22.55 15.62 2,490,776
Insider 4 4.27 2.81 448,734

INSTITUTIONAL SHAREHOLDER ROTATION

Shareholder Holders Value Chg ($MM) % O/S Share Change
Buyers 17 4.82 3.15 501,885
Sellers 24 -5.25 4.41 -703,160
Net -- -0.43 1.26 -201,275

INSTITUTIONAL SHAREHOLDER CONCENTRATION

Value ($MM) % O/S Shares
Total Inst. 127.08 80.91 12,901,686
Top 10 Inst. 107.93 68.65 10,947,561
Top 20 Inst. 121.80 77.47 12,352,892
Top 50 Inst. 127.03 80.88 12,896,288

INSTITUTIONAL SHAREHOLDER STYLE

Holders Value ($MM) % Inst Shares Shares
Growth 10 14.08 9.20 1,466,521
Aggressive Growth 3 3.55 2.32 369,329
Core Growth 7 10.53 6.88 1,097,192
Income 2 0.20 0.13 20,526
Income Value 2 0.20 0.13 20,526
Index 8 8.11 5.31 845,930
Other 17 76.51 46.70 7,446,560
Broker Dealer 4 0.18 0.12 18,583
GARP 4 5.52 3.62 577,936
Hedge Fund 8 60.92 37.00 5,899,320
VC/Private Equi 1 9.89 5.96 950,721
Value 10 21.39 15.43 2,460,007
Core Value 7 21.01 15.18 2,420,548
Deep Value 3 0.38 0.25 39,459

TOP HOLDERS: INSTITUTIONAL INVESTOR

Holder Shares Held % O/S Share Change Filing Date
Grace Brothers Management, LLC 5,363,073 33.63 -- 5/29/18
Dimensional Fund Advisors, L.P. 1,021,439 6.41 45,330 6/30/18
NGP Energy Technology Partners, L.P. 950,721 5.96 -- 5/29/18
Wellington Management Company, LLP 821,971 5.15 -- 6/30/18
Eliot Rose Asset Management, L.L.C. 727,090 4.56 -502,625 12/31/17
Thomson Horstmann & Bryant, Inc. 551,021 3.46 154,254 6/30/18
Franklin Advisory Services, LLC 426,600 2.68 -- 6/30/18
NorthPointe Capital, LLC 412,133 2.58 168,063 6/30/18
Global X Management Company LLC 345,939 2.17 -17,906 6/30/18
The Vanguard Group, Inc. 327,574 2.05 20,081 6/30/18
Popielec (Michael D) 270,288 1.70 -- 5/29/18
Renaissance Technologies LLC 247,266 1.55 18,767 6/30/18
Bridgeway Capital Management, Inc. 237,000 1.49 -- 6/30/18
Manatuck Hill Partners, LLC 140,801 0.88 10,000 6/30/18
Algert Global LLC 124,555 0.78 -15,425 6/30/18
Essex Investment Management Company, LLC 107,329 0.67 -8,798 6/30/18
Singh (Ranjit C) 79,801 0.50 -- 5/29/18
Fain (Philip A) 70,000 0.44 -- 5/29/18
Geode Capital Management, L.L.C. 69,845 0.44 6,646 6/30/18
Saeli (Thomas Louis) 58,446 0.37 6,200 5/29/18
Municipal Employees' Retirement System of Michigan 53,810 0.34 -- 6/30/18
Shaw (Robert W II) 50,000 0.31 -- 5/29/18
Acadian Asset Management LLC 37,509 0.24 62 6/30/18
O'Shaughnessy Asset Management, LLC 32,218 0.20 -2,883 6/30/18
California Public Employees' Retirement System 31,400 0.20 -- 6/30/18
BlackRock Institutional Trust Company, N.A. 31,275 0.20 2,857 6/30/18
Adviser Investments LLC 29,000 0.18 29,000 6/30/18
Deutsche Asset Management Americas 27,566 0.17 -10,334 6/30/18
Shikiar Asset Management, Inc. 26,000 0.16 -- 6/30/18
Northern Trust Investments, Inc. 25,577 0.16 -- 6/30/18
Teton Advisors, Inc. 25,000 0.16 -- 6/30/18
Susquehanna International Group, LLP 21,490 0.13 21,490 6/30/18
Anderson (Steven Mark) 18,500 0.12 -- 5/29/18
Carosa Stanton Asset Management, LLC 17,400 0.11 -- 4/30/18
J.P. Morgan Securities LLC 15,392 0.10 15,392 6/30/18
Spark Investment Management LLC 13,020 0.08 -2,680 6/30/18
Alambic Investment Management, L.P. 10,526 0.07 -2,574 6/30/18
Saturna Capital Corporation 10,000 0.06 -- 6/30/18
Vericimetry Advisors LLC 9,900 0.06 -- 6/30/18
Morgan Stanley Wealth Management 9,782 0.06 1,065 6/30/18
Invesco Capital Management LLC 8,968 0.06 -549 8/31/18
Tower Research Capital LLC 7,441 0.05 7,441 6/30/18
T. Rowe Price Associates, Inc. 5,800 0.04 -- 6/30/18
State Street Global Advisors (US) 5,352 0.03 1,254 8/31/18
Guggenheim Investments 5,004 0.03 -- 1/31/18
Invesco Advisers, Inc. 3,715 0.02 -- 8/31/18
Dimensional Fund Advisors, Ltd. 3,705 0.02 -- 7/31/18
Bank of America Merrill Lynch (US) 3,000 0.02 -1,053 6/30/18
Prelude Capital Management, LLC 2,764 0.02 -2,343 6/30/18
Northern Trust Global Investments 2,282 0.01 -- 6/30/18

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* Insider values reflect direct beneficial ownership.