Ownership Summary

Ownership Summary

Top Holders

Holder Shares Held % O/S Share Change Filing Date
ValueAct Capital Management, L.P. 6,082,646 11.17 -- 9/30/18
The Vanguard Group, Inc. 4,977,881 9.14 42,538 9/30/18
Fidelity Management & Research Company 2,411,834 4.43 -45,231 9/30/18
BlackRock Institutional Trust Company, N.A. 2,225,680 4.09 -19,017 9/30/18
State Street Global Advisors (US) 1,960,841 3.60 112,235 9/30/18
Brave Warrior Advisors, LLC 1,732,523 3.18 1,623 9/30/18
Wellington Management Company, LLP 1,727,310 3.17 -284,528 9/30/18
JP Morgan Asset Management 1,250,767 2.30 -259,650 9/30/18
Parnassus Investments 1,245,000 2.29 -- 9/30/18
Arlington Value Capital, LLC 1,088,979 2.00 86,387 9/30/18

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
Vanguard Total Stock Market Index Fund 1,210,108 2.22 19,746 11/30/18
Vanguard Mid-Cap Index Fund 1,107,570 2.03 11,942 12/31/18
Parnassus Endeavor Fund 1,000,000 1.84 -- 11/30/18
Vanguard 500 Index Fund 887,010 1.63 7,825 12/31/18
Fidelity Balanced Fund 752,100 1.38 54,100 11/30/18
Ivy Science and Technology Fund 672,818 1.24 -- 9/30/18
SPDR S&P 500 ETF 537,879 0.99 -392 12/31/18
Caisse de depot et Placement du Quebec 528,111 0.97 138,419 12/31/17
Statens Pensjonsfond Utland 488,253 0.90 167,409 12/31/17
US Bank Vanguard Institutional 500 Index Trust 444,026 0.82 -7,086 12/31/18