OWNERSHIP PROFILE

SHAREHOLDER BREAKDOWN

Shareholder Holders Value ($MM) % O/S Shares
Institution 57 123.35 83.78 13,368,465
Mutual Fund 54 19.85 15.53 2,478,106
Insider 4 4.27 2.81 448,734

INSTITUTIONAL SHAREHOLDER ROTATION

Shareholder Holders Value Chg ($MM) % O/S Share Change
Buyers 16 6.97 5.36 855,719
Sellers 25 -7.16 6.06 -967,172
Net -- -0.19 0.70 -111,453

INSTITUTIONAL SHAREHOLDER CONCENTRATION

Value ($MM) % O/S Shares
Total Inst. 123.35 83.78 13,368,465
Top 10 Inst. 102.16 68.14 10,872,614
Top 20 Inst. 118.39 80.11 12,782,272
Top 50 Inst. 123.32 83.76 13,364,621

INSTITUTIONAL SHAREHOLDER STYLE

Holders Value ($MM) % Inst Shares Shares
Growth 11 14.93 11.48 1,832,218
Aggressive Growth 4 5.92 4.55 726,528
Core Growth 7 9.01 6.93 1,105,690
Income 1 0.08 0.06 10,000
Income Value 1 0.08 0.06 10,000
Index 8 8.35 6.04 964,038
Other 16 77.21 48.45 7,730,479
Broker Dealer 4 0.23 0.18 28,641
GARP 3 4.99 3.84 612,013
Hedge Fund 8 62.10 38.47 6,139,104
VC/Private Equi 1 9.89 5.96 950,721
Value 10 16.77 13.80 2,201,652
Core Value 7 16.46 13.56 2,163,691
Deep Value 3 0.31 0.24 37,961

TOP HOLDERS: INSTITUTIONAL INVESTOR

Holder Shares Held % O/S Share Change Filing Date
Grace Brothers Management, LLC 5,363,073 33.61 -- 5/29/18
Dimensional Fund Advisors, L.P. 1,050,208 6.58 28,769 9/30/18
NGP Energy Technology Partners, L.P. 950,721 5.96 -- 5/29/18
Eliot Rose Asset Management, L.L.C. 727,090 4.56 -502,625 12/31/17
Wellington Management Company, LLP 642,427 4.03 -179,544 9/30/18
Thomson Horstmann & Bryant, Inc. 588,813 3.69 37,792 9/30/18
The Vanguard Group, Inc. 443,699 2.78 116,125 9/30/18
Franklin Advisory Services, LLC 426,600 2.67 -- 9/30/18
Global X Management Company LLC 345,939 2.17 -17,906 6/30/18
NorthPointe Capital, LLC 334,044 2.09 -78,089 9/30/18
Mirae Asset Global Investments (USA) LLC 317,511 1.99 317,511 9/30/18
Popielec (Michael D) 270,288 1.69 -- 5/29/18
Renaissance Technologies LLC 258,100 1.62 10,834 9/30/18
Monashee Investment Management, LLC 250,000 1.57 250,000 9/30/18
Bridgeway Capital Management, Inc. 202,000 1.27 -35,000 9/30/18
Essex Investment Management Company, LLC 182,017 1.14 74,688 9/30/18
Manatuck Hill Partners, LLC 140,801 0.88 -- 9/30/18
Algert Global LLC 123,734 0.78 -821 9/30/18
Fain (Philip A) 85,406 0.54 15,406 12/3/18
Singh (Ranjit C) 79,801 0.50 -- 5/29/18
Geode Capital Management, L.L.C. 70,804 0.44 959 9/30/18
Saeli (Thomas Louis) 60,446 0.38 2,000 11/14/18
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 36,011 0.23 -1,498 9/30/18
BlackRock Institutional Trust Company, N.A. 32,629 0.20 1,354 9/30/18
California Public Employees' Retirement System 31,400 0.20 -- 9/30/18
Deutsche Asset Management Americas 26,600 0.17 -966 9/30/18
Shikiar Asset Management, Inc. 26,000 0.16 -- 9/30/18
Northern Trust Investments, Inc. 25,577 0.16 -- 9/30/18
Teton Advisors, Inc. 25,000 0.16 -- 9/30/18
J.P. Morgan Securities LLC 19,200 0.12 3,808 9/30/18
Anderson (Steven Mark) 18,500 0.12 -- 5/29/18
Carosa Stanton Asset Management, LLC 17,400 0.11 -- 4/30/18
O'Shaughnessy Asset Management, LLC 14,287 0.09 -17,931 9/30/18
State Street Global Advisors (US) 10,458 0.07 6,360 9/30/18
Saturna Capital Corporation 10,000 0.06 -- 9/30/18
Vericimetry Advisors LLC 9,900 0.06 -- 6/30/18
Morgan Stanley Wealth Management 8,408 0.05 -1,374 9/30/18
T. Rowe Price Associates, Inc. 5,800 0.04 -- 9/30/18
Guggenheim Investments 5,591 0.04 33 7/31/17
Barclays Capital Inc. 4,510 0.03 4,475 9/30/18
Dimensional Fund Advisors, Ltd. 3,705 0.02 -- 10/31/18
Invesco Capital Management LLC 3,532 0.02 -5,436 10/31/18
Bank of America Merrill Lynch (US) 3,000 0.02 -- 9/30/18
Northern Trust Global Investments 2,282 0.01 -- 9/30/18
AXA Rosenberg Investment Management LLC 1,939 0.01 189 10/31/18
Morgan Stanley & Co. LLC 1,931 0.01 1,775 9/30/18
Prelude Capital Management, LLC 1,879 0.01 -885 9/30/18
BlackRock Investment Management, LLC 1,750 0.01 -- 9/30/18

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* Insider values reflect direct beneficial ownership.