Explanation of Responses: |
(1) | The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. |
(2) | This transaction was executed in multiple trades at prices ranging from $141.50 to $142.48. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(3) | This transaction was executed in multiple trades at prices ranging from $142.56 to $143.54. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(4) | This transaction was executed in multiple trades at prices ranging from $143.56 to $144.5450. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(5) | This transaction was executed in multiple trades at prices ranging from $144.56 to $145.50. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(6) | This transaction was executed in multiple trades at prices ranging from $145.58 to $146.53. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(7) | This transaction was executed in multiple trades at prices ranging from $146.58 to $147.57. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(8) | This transaction was executed in multiple trades at prices ranging from $147.58 to $148.57. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(9) | This transaction was executed in multiple trades at prices ranging from $148.59 to $148.71. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(10) | This transaction was executed in multiple trades at prices ranging from $141.3950 to $142.39. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(11) | This transaction was executed in multiple trades at prices ranging from $142.41 to $143.39. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(12) | This transaction was executed in multiple trades at prices ranging from $143.41 to $144.38. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(13) | This transaction was executed in multiple trades at prices ranging from $144.41 to $145.39. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(14) | This transaction was executed in multiple trades at prices ranging from $145.48 to $146.47. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(15) | This transaction was executed in multiple trades at prices ranging from $146.49 to $147.47. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(16) | This transaction was executed in multiple trades at prices ranging from $147.49 to $148.4650. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(17) | This transaction was executed in multiple trades at prices ranging from $148.50 to $148.68. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected. |
(18) | Exercise of stock option granted under the 2011 Equity Incentive Plan (the "Plan") on July 20, 2016. |
(19) | Exercise of stock option granted under the Plan on May 30, 2018; the option vested and became exercisable as to 25% of the total shares on August 3, 2018, and 1/48th of the total shares vests and becomes exercisable monthly thereafter, such that the option is fully vested and exercisable on August 3, 2021 subject to any accelerated vesting provided under the Executive Change in Control Severance Agreement by and between the Reporting Person and the Issuer. |