Ownership Summary

Top Holders

Holder Shares Held % O/S Share Change Filing Date
BlackRock Institutional Trust Company, N.A. 973,450 6.57 -253 12/31/17
Frontier Capital Management Company, LLC 813,550 5.49 -137,857 12/31/17
The Vanguard Group, Inc. 779,763 5.26 14,192 12/31/17
Renaissance Technologies LLC 646,400 4.36 68,400 12/31/17
Dimensional Fund Advisors, L.P. 554,130 3.74 14,937 12/31/17
Adage Capital Management, L.P. 410,000 2.77 210,000 12/31/17
Impax Asset Management LLC 400,077 2.70 3,900 12/31/17
State Street Global Advisors (US) 370,706 2.50 15,166 12/31/17
Monarch Partners Asset Management LLC 185,714 1.25 27,016 12/31/17
Northern Trust Investments, Inc. 162,863 1.10 -1,076 12/31/17

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
Pax World Small Cap Fund 396,177 2.67 13,154 9/30/17
Vanguard Total Stock Market Index Fund 370,498 2.50 -- 1/31/18
iShares Russell 2000 ETF 269,099 1.82 -6,600 1/31/18
Vanguard Extended Market Index Fund 198,891 1.34 -901 1/31/18
DFA U.S. Small Cap Portfolio 188,122 1.27 305 10/31/17
British Columbia Investment Management Corp 140,277 0.95 26,858 3/31/17
iShares Russell 2000 Value ETF 127,107 0.86 -422 1/31/18
DFA U.S. Micro Cap Portfolio 117,871 0.80 350 10/31/17
Vanguard Explorer Value Fund 98,950 0.67 2,931 9/30/17
Fidelity Extended Market Index Fund 68,493 0.46 -- 12/31/17

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