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Ownership Summary

Top Holders

Holder Shares Held % O/S Share Change Filing Date
BlackRock Institutional Trust Company, N.A. 3,234,637 10.51 431,644 9/30/18
Dimensional Fund Advisors, L.P. 2,539,225 8.25 -46,491 6/30/18
The Vanguard Group, Inc. 2,437,675 7.92 668,621 6/30/18
Satterfield (Thomas A Jr) 1,639,000 5.33 1,639,000 10/2/18
AQR Capital Management, LLC 717,369 2.33 454,526 6/30/18
Northern Trust Investments, Inc. 695,795 2.26 -233,728 6/30/18
Northern Trust Global Investments 574,649 1.87 -122,726 6/30/18
Invesco Capital Management LLC 522,457 1.70 277,038 6/30/18
Renaissance Technologies LLC 505,600 1.64 382,300 6/30/18
Royce & Associates, LP 485,386 1.58 -661,766 6/30/18

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
Vanguard Total Stock Market Index Fund 926,303 3.01 6,681 9/30/18
DFA U.S. Small Cap Value Portfolio 619,604 2.01 -- 7/31/18
Vanguard Tax-Managed Small-Cap Fund 450,122 1.46 -351,127 9/30/18
Vanguard Extended Market Index Fund 429,937 1.40 23,126 9/30/18
Northern Small Cap Value Fund 370,338 1.20 -181,580 9/30/18
Invesco S&P SmallCap Health Care ETF 331,401 1.08 95,964 9/30/18
DFA U.S. Targeted Value Portfolio 315,691 1.03 -- 7/31/18
IQ Chaikin US Small Cap ETF 311,238 1.01 12,127 10/31/18
DFA U.S. Small Cap Portfolio 297,901 0.97 -- 7/31/18
DFA U.S. Micro Cap Portfolio 291,782 0.95 -- 7/31/18

* Insider values reflect direct beneficial ownership.

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