Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F3	Mar 20, 2018	P	134,900	$32.96	A	20,898,595	I	See Footnotes
Common Stock^F2,F3	Mar 21, 2018	P	12,605	$33.00	A	20,911,200	I	See Footnotes
Common Stock^F4,F2,F3	Mar 22, 2018	P	300,000	$32.47	A	21,211,200	I	See Footnotes

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1Weighted-average price at which shares were purchased on the listed date between the range of $32.93 and $32.99 per share. The reporting persons undertake to provide upon request to the SEC Staff, the Issuer, or a security holder of the Issuer information regarding the number of shares purchased at each price.
F2Each reporting person listed herein disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein, and this report shall not be deemed an admission that such person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
F3The securities reported herein are directly beneficially owned by ValueAct Capital Master Fund, L.P. and may be deemed to be indirectly beneficially owned by (i) VA Partners I, LLC as General Partner of ValueAct Capital Master Fund, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P., (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P., (iv) ValueAct Holdings, L.P. as the sole owner of the limited partnership interests of ValueAct Capital Management, L.P. and the membership interests of ValueAct Capital Management, LLC and as the majority owner of the membership interests of VA Partners I, LLC and (v) ValueAct Holdings GP, LLC as General Partner of ValueAct Holdings, L.P.
F4Weighted-average price at which shares were purchased on the listed date between the range of $32.37 and $32.57 per share. The reporting persons undertake to provide upon request to the SEC Staff, the Issuer, or a security holder of the Issuer information regarding the number of shares purchased at each price.

Remarks

The reporting persons herein may be deemed to be members of a "group" for purposes of the Securities Exchange Act of 1934, as amended. Each reporting person disclaims beneficial ownership of any securities deemed to be owned by the group that are not directly owned by such reporting person. This report shall not be deemed an admission that such reporting person is a member of a group or the beneficial owner of any securities not directly owned by such reporting person.