EXHIBIT A
Transactions in the Shares of the Issuer During the Last 60 Days
The following tables set forth all transactions in the Shares effected in the past sixty days by the Reporting Persons. Except as noted below, all such transactions were effected in the open market through brokers and the price per share is net of commissions.
JANA
| Trade Date | Shares Purchased (Sold) | Price Per Share ($) |
| 02/21/2018 | 25,949 | 55.61 |
| 02/21/2018 | 61,700 | 55.66 |
| 02/22/2018 | 301,759 | 55.51 |
| 02/22/2018 | 400 | 55.42 |
| 02/22/2018 | 49,100 | 55.52 |
| 02/26/2018 | 50,200 | 55.56 |
| 02/26/2018 | 160,483 | 55.52 |
| 02/26/2018 | 357,300 | 55.57 |
| 02/27/2018 | 308,679 | 55.46 |
| 02/27/2018 | 21,095 | 55.36 |
| 02/27/2018 | 874,800 | 55.40 |
| 02/27/2018 | 50,000 | 55.68 |
| 02/28/2018 | 69,213 | 54.42 |
| 02/28/2018 | 328,500 | 54.18 |
| 02/28/2018 | 14,400 | 54.13 |
| 03/01/2018 | 74,551 | 53.99 |
| 03/01/2018 | 38,500 | 54.03 |
| 03/01/2018 | 464,213 | 54.06 |
| 03/01/2018 | 237,300 | 54.07 |
| 03/16/2018 | 8,600 | 54.87 |
| 03/16/2018 | 11,500 | 55.06 |
| 03/16/2018 | 128,373 | 54.99 |
| 03/19/2018 | 38,200 | 54.81 |
| 03/19/2018 | 359,643 | 54.93 |
| 03/20/2018 | 159,254 | 54.99 |
| 03/21/2018 | 127,592 | 52.96 |
| 03/21/2018 | 25,571 | 53.46 |
| 03/21/2018 | 783,319 | 53.05 |
| 03/21/2018 | 67,948 | 53.28 |
| 03/22/2018 | 63,067 | 53.83 |
| 03/23/2018 | 25,000 | 53.63 |
| 03/23/2018 | 65,125 | 53.79 |
| 03/26/2018 | 7,926 | 53.80 |
| 04/09/2018 | 313,744 | 54.83 |
| 04/09/2018 | 43,611 | 54.67 |
| 04/09/2018 | (65,000) | 54.88 |
| 04/10/2018 | 145,636 | 55.01 |
| 04/10/2018 | 288,557 | 55.02 |
| 04/10/2018 | 11,000 | 54.96 |
| 04/11/2018 | 179,255 | 55.21 |
| 04/11/2018 | 96,329 | 55.28 |
| 04/11/2018 | 28,413 | 55.27 |
| 04/11/2018 | 31,700 | 55.12 |
| 04/12/2018 | 407,540 | 55.35 |
| 04/12/2018 | 202,281 | 55.41 |
| 04/12/2018 | 93,866 | 55.36 |
| 04/13/2018 | 53,698 | 55.74 |
| 04/13/2018 | 23,752 | 55.78 |
| 04/13/2018 | 116,042 | 55.83 |
| 04/13/2018 | 20,200 | 55.75 |
| 04/16/2018 | 174,838 | 56.75 |
| 04/16/2018 | 41,499 | 56.68 |
| 04/16/2018 | 370,824 | 56.84 |
| 04/17/2018 | 531,802 | 56.78 |
| 04/17/2018 | 371,800 | 56.72 |
| 04/17/2018 | 309,800 | 56.87 |
| 04/17/2018 | 205,000 | 56.64 |
| 04/17/2018 | 120,938 | 56.86 |
| 04/17/2018 | 140,693 | 56.69 |
| 04/18/2018 | 479,771 | 56.73 |
| 04/18/2018 | 275,411 | 56.76 |
| 04/18/2018 | 73,410 | 56.78 |
| 04/19/2018 | 267,000 | 55.87 |
| 04/19/2018 | 111,608 | 55.95 |
| 04/19/2018 | 3,000 | 55.96 |
Mr. Lawrence
| Trade Date | Shares Purchased (Sold) | Price Per Share ($) |
| 03/20/2018 | 200,000 | 55.08 |
| 03/21/2018 | 100,000 | 53.45 |
Mr. Murphy
| Trade Date | Shares Purchased (Sold) | Price Per Share ($) |
| 03/26/2018 | 115,262 | 53.78 |
| 03/28/2018 | 34,738 | 53.99 |
Ms. Dietz
| Trade Date | Shares Purchased (Sold) | Price Per Share ($) |
| 04/09/2018 | 30,000 | 54.88 |
| 04/09/2018 | 10,000 | 54.61 |
| 04/09/2018 | 10,000 | 54.63 |
| 04/09/2018 | 8,050 | 54.70 |
| 04/09/2018 | 3,950 | 54.42 |