X0306 4 2019-04-25 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 2019-04-25 4 C 0 73 0.00 A 461 D Class C Google Stock Units 2019-04-25 4 F 0 15 1256.00 D 73 D Class C Google Stock Units 2019-04-25 4 C 0 14 0.00 D 59 D Class C Google Stock Units 2019-04-25 4 C 0 59 0.00 D 928 D Class C Google Stock Units 2019-04-25 4 F 0 51 1256.00 D 877 D Class A Common Stock 447 D Class C Google Stock Units 1449 D Vesting of Google Stock Units ("GSUs") grant of which was previously reported in Form 4. The Class C GSUs entitle the Reporting Person to receive one share of Alphabet Inc. Class C Capital Stock for each share underlying the GSU as GSU vests. 1/48th of GSUs vested on July 25, 2015 and an additional 1/48th of GSUs vests monthly thereafter until the GSUs are fully vested, subject to continued employment on such vesting dates. 3. Shares withheld to satisfy tax obligations arising out of vesting of GSUs. Shares withheld to satisfy tax obligations arising out of vesting of GSUs. 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. 1/12th of GSUs vests on January 25, 2020 and an additional 1/12th of GSUs vests monthly thereafter until the GSUs are fully vested, subject to continued employment on such vesting dates. /s/ Valentina Margulis as Attorney-in-Fact for Amie Thuener O'Toole 2019-04-26