OWNERSHIP SUMMARY

Top Holders

Holder Shares Held % O/S Share Change Filing Date
BlackRock Institutional Trust Company, N.A. 2,758,482 12.96 -27,227 9/30/18
The Vanguard Group, Inc. 2,557,469 12.01 443,322 9/30/18
Dimensional Fund Advisors, L.P. 1,204,015 5.65 -5,552 9/30/18
RE Advisers Corporation 831,230 3.90 -- 9/30/18
Acadian Asset Management LLC 765,717 3.60 380,544 9/30/18
Arthur Zaske & Associates, LLC 744,110 3.49 -339,322 12/31/17
Two Sigma Investments, LP 630,905 2.96 187,077 9/30/18
State Street Global Advisors (US) 596,706 2.80 68,875 9/30/18
Rothschild Asset Management, Inc. 493,839 2.32 12,155 9/30/18
OppenheimerFunds, Inc. 473,441 2.22 196,558 9/30/18

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
iShares Core S&P Small-Cap ETF 1,029,642 4.84 -- 11/30/18
Homestead Small Company Stock Fund 657,427 3.09 -- 6/30/18
Vanguard Total Stock Market Index Fund 558,391 2.62 37,430 12/31/18
Vanguard Small-Cap Index Fund 548,197 2.57 12,268 12/31/18
iShares Russell 2000 ETF 457,645 2.15 13,231 12/31/18
Statens Pensjonsfond Utland 400,919 1.88 222,043 12/31/17
Baron Small Cap Fund 386,191 1.81 -113,809 9/30/18
iShares S&P Small-Cap 600 Growth ETF 328,841 1.54 123,748 12/31/18
Oppenheimer Discovery Fund 315,730 1.48 -71,220 11/30/18
Vanguard Small-Cap Growth Index Fund 309,236 1.45 -97 12/31/18

* Insider values reflect direct beneficial ownership.

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