X0306 4 2022-09-01 0 0001866692 Amplitude, Inc. AMPL 0001883031 Vuong Hoang C/O AMPLITUDE, INC. 201 THIRD ST., SUITE 200 SAN FRANCISCO CA 94103 0 1 0 0 Chief Financial Officer Class A Common Stock 2022-09-01 4 M 0 14748 2.26 A 364479 D Class A Common Stock 189 I Trust Stock Option (Right to Buy) 2.26 2022-09-01 4 M 0 14748 0 D 2029-06-03 Class A Common Stock 14748 29495 D Includes 300,171 restricted stock units. Represents shares of Class A Common Stock received in a pro rata in-kind distribution exempt from reporting pursuant to Rule 16a-9. Securities held by a trust over which the Reporting Person exercises voting and dispositive control. The option is early exercisable. 1/48th of the shares subject to the option vest on each monthly anniversary measured from April 29, 2019 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date. /s/ Elizabeth Fisher, as Attorney-in-Fact for Hoang Vuong 2022-09-06