Ownership Summary

Top Holders

Holder Shares Held % O/S Share Change Filing Date
BlackRock Institutional Trust Company, N.A. 1,041,943 7.01 13,972 9/30/18
Frontier Capital Management Company, LLC 876,351 5.89 41,006 9/30/18
Renaissance Technologies LLC 813,000 5.47 29,200 9/30/18
The Vanguard Group, Inc. 763,438 5.13 41,978 9/30/18
Dimensional Fund Advisors, L.P. 571,595 3.84 3,886 9/30/18
Impax Asset Management LLC 507,954 3.42 7,000 9/30/18
Adage Capital Management, L.P. 410,000 2.76 -- 9/30/18
State Street Global Advisors (US) 344,882 2.32 12,067 9/30/18
Aristotle Capital Boston, LLC 224,533 1.51 11,069 9/30/18
Eagle Boston Investment Management, Inc. 196,211 1.32 4,769 9/30/18

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
Pax Small Cap Fund 507,954 3.42 7,000 9/30/18
Vanguard Total Stock Market Index Fund 390,136 2.62 385 10/31/18
iShares Russell 2000 ETF 324,074 2.18 3,132 11/30/18
Vanguard Extended Market Index Fund 202,349 1.36 3,468 10/31/18
DFA U.S. Small Cap Portfolio 199,331 1.34 3,358 7/31/18
iShares Russell 2000 Value ETF 140,761 0.95 6,848 11/30/18
DFA U.S. Micro Cap Portfolio 119,658 0.80 -- 7/31/18
Vanguard Explorer Value Fund 110,216 0.74 -- 9/30/18
Tributary Small Company Fund 88,400 0.59 13,767 9/30/18
Vanguard Utilities Index Fund 68,678 0.46 2,501 10/31/18

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