Ownership Profile

Shareholder Breakdown

Shareholder Holders Value ($MM) % O/S Shares
Institution 40 16.23 48.31 15,377,203
Mutual Fund 14 0.55 1.61 513,487
Insider 3 2.05 1.41 448,598

Institutional Shareholder Rotation

Shareholder Holders Value Chg ($MM) % O/S Share Change
Buyers 9 3.08 11.38 3,621,271
Sellers 20 -2.75 5.49 -1,748,927
Net -- 0.33 5.89 1,872,344

Institutional Shareholder Concentration

Value ($MM) % O/S Shares
Total Inst. 16.23 48.31 15,377,203
Top 10 Inst. 15.54 46.80 14,896,985
Top 20 Inst. 16.13 48.11 15,313,028
Top 50 Inst. 16.23 48.31 15,377,203

Institutional Shareholder Style

Holders Value ($MM) % Inst Shares Shares
Growth 4 2.12 9.70 3,086,876
Aggressive Growth 1 0.10 0.20 65,000
Core Growth 2 0.03 0.07 21,876
Growth 1 1.98 9.42 3,000,000
Income 1 0.01 0.01 3,758
Income Value 1 0.01 0.01 3,758
Index 5 1.17 2.32 738,665
Other 12 8.25 21.32 6,786,272
Broker Dealer 5 0.07 0.14 44,852
GARP 2 0.11 0.23 72,703
Hedge Fund 3 0.71 1.19 377,789
VC/Private Equi 2 7.35 19.76 6,290,928
Value 5 0.02 0.04 13,305
Core Value 3 0.01 0.03 8,074
Deep Value 2 0.01 0.02 5,231

Top Holders: Institutional Investor

Fund Shares Held % O/S Share Change Filing Date
Vanguard Total Stock Market Index Fund 202,201 0.64 108,550 10/31/17
Vanguard Extended Market Index Fund 85,853 0.27 -- 10/31/17
Bridgeway Ultra-Small Company Market Fund 65,000 0.20 -- 6/30/17
T. Rowe Price Extended Equity Market Index Fund 52,700 0.17 -- 9/30/17
iShares Micro-Cap ETF 35,847 0.11 1,344 11/30/17
Fidelity Extended Market Index Fund 33,461 0.11 -- 10/31/17
Fidelity NASDAQ Composite Index Fund 16,656 0.05 -- 10/31/17
Fidelity Total Market Index Fund 6,105 0.02 -- 10/31/17
Wilshire Micro-Cap ETF 4,765 0.01 -594 10/31/17
iShares Core S&P Total U.S. Stock Market ETF 4,128 0.01 332 11/30/17
1290 VT Micro Cap Portfolio 2,745 0.01 -- 10/31/17
Legg Mason Small-Cap Quality Value ETF 2,486 0.01 2,486 8/31/17
Vanguard US Equity Index Fund 1,400 -- -- 10/31/17
Vanguard US Total Market Index ETF 140 -- 140 9/30/17

Top Holders

Holder Shares Held % O/S Share Change Filing Date
Third Rock Ventures, LLC 4,841,591 15.21 -- 10/31/17
Clairmark Investments, Ltd. 3,582,328 11.25 -- 10/31/17
Empery Asset Management, L.P. 3,000,000 9.42 3,000,000 11/1/17
JAFCO Co., Ltd. 1,449,337 4.55 -- 4/7/17
BlackRock Institutional Trust Company, N.A. 440,946 1.39 -1,713 9/30/17
Celniker (Abbie C) 409,915 1.29 -- 10/31/17
Hurly (Stephen A.) 398,031 1.25 -- 10/31/17
Sabby Management, LLC 348,893 1.10 348,893 12/31/16
Municipal Employees' Retirement System of Michigan 241,640 0.76 241,640 9/30/17
The Vanguard Group, Inc. 184,304 0.58 -22,146 9/30/17
Lynch (Daniel S) 70,879 0.22 -- 10/31/17
Bridgeway Capital Management, Inc. 65,000 0.20 -- 9/30/17
Geode Capital Management, L.L.C. 56,222 0.18 -- 9/30/17
T. Rowe Price Associates, Inc. 52,700 0.17 -- 9/30/17
Virtu Americas LLC 38,546 0.12 -72,934 9/30/17
Mellon Capital Management Corporation 36,600 0.11 -- 9/30/17
Tubridy (Karen L) 32,753 0.10 -- 10/31/17
Citadel LLC 22,747 0.07 22,747 9/30/17
Northern Trust Investments, Inc. 20,593 0.06 -- 9/30/17
PanAgora Asset Management Inc. 20,003 0.06 -4,286 9/30/17
Fiduciary Trust Company 20,000 0.06 -- 9/30/17
Acrospire Investment Management LLC 6,149 0.02 -300 6/30/17
McCabe (John J) 5,930 0.02 -- 10/31/17
Guggenheim Investments 5,324 0.02 5,324 3/31/17
Morgan Stanley & Co. LLC 5,130 0.02 -289 9/30/17
BNY Mellon Asset Management 3,758 0.01 -- 9/30/17
AXA Rosenberg Investment Management LLC 2,745 0.01 -- 10/31/17
BlackRock Investment Management, LLC 2,745 0.01 -- 9/30/17
Royce & Associates, LP 2,486 0.01 2,486 8/31/17
UBS Financial Services, Inc. 2,000 0.01 -846 9/30/17
Independent Financial Partners 2,000 0.01 -- 9/30/17
Morgan Stanley Wealth Management 1,876 0.01 -- 9/30/17
Advisor Group, Inc 1,300 -- -- 9/30/17
Advantage Investment Management, LLC 1,000 -- -- 9/30/17
Citi Investment Research (US) 600 -- 100 9/30/17
RBC Capital Markets Wealth Management 500 -- -- 9/30/17
IHT Wealth Management, LLC 490 -- -- 9/30/17
Barclays Capital Inc. 76 -- 76 9/30/17
Cutler Group, LP 61 -- -400 9/30/17
RBC Capital Partners 5 -- 5 9/30/17

* Insider values reflect direct beneficial ownership.

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