Ownership Summary

Top Holders

Holder Shares Held % O/S Share Change Filing Date
Royce & Associates, LP 2,556,983 8.25 542,700 3/31/18
Siemer (Arnold B) 2,126,564 6.86 -881,123 12/31/17
Renaissance Technologies LLC 2,035,800 6.57 -5,073 3/31/18
Dimensional Fund Advisors, L.P. 1,655,323 5.34 20,385 3/31/18
BlackRock Institutional Trust Company, N.A. 1,255,531 4.05 43,210 3/31/18
The Vanguard Group, Inc. 1,201,080 3.87 -2,449 3/31/18
Eagle Boston Investment Management, Inc. 1,097,569 3.54 26,977 3/31/18
Aristotle Capital Boston, LLC 1,052,650 3.40 78,642 3/31/18
AQR Capital Management, LLC 702,262 2.27 153,749 3/31/18
Alambic Investment Management, L.P. 616,068 1.99 185,926 3/31/18

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
Royce Opportunity Fund 818,846 2.64 -162,268 3/31/18
Vanguard Total Stock Market Index Fund 761,826 2.46 92,449 4/30/18
Legg Mason Royce US Small Cap Opportunity Fund 755,495 2.44 50,450 3/31/18
DFA U.S. Small Cap Portfolio 577,137 1.86 142,630 1/31/18
iShares Russell 2000 ETF 501,923 1.62 -2,184 4/30/18
Vanguard Extended Market Index Fund 349,236 1.13 1,014 4/30/18
iShares Russell 2000 Growth ETF 213,970 0.69 4,774 4/30/18
Legg Mason IF Royce US Smaller Companies Fund 181,674 0.59 181,674 3/31/18
DFA U.S. Micro Cap Portfolio 177,398 0.57 7,931 1/31/18
KP Small Cap Equity Fund;Instl 158,875 0.51 7,528 12/31/17

* Insider values reflect direct beneficial ownership.

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