X0306 4 2022-12-29 false 0001866692 Amplitude, Inc. AMPL 0001883031 Vuong Hoang C/O AMPLITUDE, INC. 201 THIRD ST., SUITE 200 SAN FRANCISCO CA 94103 false true false false Chief Financial Officer Class A Common Stock 2022-12-29 4 M false 14748.00 2.26 A 813896.00 D Class A Common Stock 378.00 I Trust Stock Options (Right to buy) 2.26 2022-12-29 4 M false 14748.00 0.00 D 2029-06-03 Class A Common Stock 14748.00 14747.00 D Includes 1,481 shares acquired under the Issuer's employee stock purchase plan on November 14, 2022. Includes 300,171 restricted stock units. Includes 189 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 2023-01-03