X0306 4 2018-08-02 0 0001652044 Alphabet Inc. GOOG 0001738007 O'Toole Amie Thuener C/O ALPHABET INC. 1600 AMPHITHEATRE PKWY MOUNTAIN VIEW CA 94043 0 1 0 0 VP, Chief Accounting Officer Class C Capital Stock 2018-08-02 4 S 0 80 1206.20 D 388 D Class A Common Stock 447 D Class C Google Stock Units 1315 D Class C Google Stock Units 660 D Class C Google Stock Units 320 D The Class C Google Stock Units (GSUs) entitle the Reporting Person to receive one share of Alphabet Inc. Class C Capital Stock for each share underlying the GSU as GSU vest. 1/12th of GSUs vests on January 25, 2019 and an additional 1/12th of GSUs vests monthly thereafter until the GSUs are fully vested, subject to continued employment on such vesting dates. 1/6th of GSUs vested on July 25, 2018 and an additional 1/6th of GSUs vests monthly thereafter until the GSUs are fully vested, subject to continued employment on such vesting dates. 1/48th of GSUs vested on June 25, 2014 and an additional 1/48th of GSUs vests monthly thereafter until the GSUs are fully vested, subject to continued employment on such vesting dates. Transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person. /s/ Valentina Margulis, as Attorney-in-Fact for Amie Thuener O'Toole 2018-08-03