X0306 4 2018-02-01 0 0001035267 INTUITIVE SURGICAL INC ISRG 0001280628 GUTHART GARY S 1020 KIFER ROAD SUNNYVALE CA 94086 1 1 0 0 President & CEO Non-Qualified Stock Option (right to buy) 178.3867 2018-02-01 4 D 0 4119 0.00 D 2026-02-16 Common Stock 4119 2631 D Non-Qualified Stock Option (right to buy) 230.9967 2018-02-01 4 D 0 6750 0.00 D 2026-08-15 Common Stock 6750 0 D The remaining shares subject to the option will continue to vest as to 1/8th of the shares six months following 2/16/2016 and 1/48th monthly thereafter. The option was cancelled with respect to the number of shares reported pursuant to an agreement between the reporting person and the issuer. The option cancellation was in partial satisfaction of the terms of a settlement of claims brought in a purported stockholder's derivative lawsuit against the reporting person, among other current and former officers and directors of the issuer, and the issuer as a nominal defendant. The option was vesting as to 7/48th of the shares one month following 8/15/2016 and 1/48th monthly thereafter immediately prior to cancellation. /s/ Gary S Guthart 2018-02-05