OWNERSHIP SUMMARY

Top Holders

Holder Shares Held % O/S Share Change Filing Date
BlackRock Institutional Trust Company, N.A. 2,500,491 12.03 288,445 3/31/18
The Vanguard Group, Inc. 2,114,147 10.17 313,805 6/30/18
Dimensional Fund Advisors, L.P. 1,211,415 5.83 7,303 3/31/18
RE Advisers Corporation 831,230 4.00 -- 3/31/18
Millennium Management LLC 823,231 3.96 -202,305 3/31/18
Arthur Zaske & Associates, LLC 744,110 3.58 -339,322 12/31/17
Neuberger Berman, LLC 677,061 3.26 -96,792 3/31/18
State Street Global Advisors (US) 511,718 2.46 -23,539 3/31/18
Baron Capital Management, Inc. 500,000 2.41 -- 3/31/18
Maverick Capital, Ltd. 481,360 2.32 256,821 3/31/18

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
iShares Core S&P Small-Cap ETF 961,703 4.63 95,967 6/30/18
Homestead Small Company Stock Fund 657,427 3.16 -- 3/31/18
Vanguard Total Stock Market Index Fund 515,824 2.48 36,239 6/30/18
Vanguard Small-Cap Index Fund 515,523 2.48 47,516 6/30/18
Baron Small Cap Fund 500,000 2.41 -- 3/31/18
iShares Russell 2000 ETF 435,016 2.09 42,449 6/30/18
Statens Pensjonsfond Utland 400,919 1.93 222,043 12/31/17
Vanguard Small-Cap Growth Index Fund 293,842 1.41 25,391 6/30/18
DFA U.S. Small Cap Portfolio 269,487 1.30 -- 4/30/18
Vanguard Extended Market Index Fund 236,398 1.14 3,871 6/30/18

* Insider values reflect direct beneficial ownership.

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