Ownership Summary

Top Holders

Holder Shares Held % O/S Share Change Filing Date
BlackRock Institutional Trust Company, N.A. 975,950 6.57 2,500 3/31/18
Frontier Capital Management Company, LLC 856,254 5.76 42,704 3/31/18
The Vanguard Group, Inc. 749,280 5.04 -30,483 3/31/18
Renaissance Technologies LLC 716,425 4.82 70,025 3/31/18
Dimensional Fund Advisors, L.P. 562,100 3.78 7,970 3/31/18
Impax Asset Management LLC 499,549 3.36 99,472 3/31/18
Adage Capital Management, L.P. 410,000 2.76 -- 3/31/18
State Street Global Advisors (US) 334,920 2.25 -35,786 3/31/18
Aristotle Capital Boston, LLC 199,950 1.35 47,537 3/31/18
Monarch Partners Asset Management LLC 187,686 1.26 1,972 3/31/18

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
Pax World Small Cap Fund 499,549 3.36 99,472 3/31/18
Vanguard Total Stock Market Index Fund 371,152 2.50 654 5/31/18
iShares Russell 2000 ETF 291,253 1.96 15,769 5/31/18
Vanguard Extended Market Index Fund 209,581 1.41 11,473 5/31/18
DFA U.S. Small Cap Portfolio 190,919 1.28 2,797 1/31/18
British Columbia Investment Management Corp 140,277 0.94 26,858 3/31/17
iShares Russell 2000 Value ETF 140,169 0.94 9,450 5/31/18
DFA U.S. Micro Cap Portfolio 119,658 0.81 1,787 1/31/18
Vanguard Explorer Value Fund 110,216 0.74 5,553 3/31/18
Fidelity Extended Market Index Fund 68,493 0.46 -- 4/30/18

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