X0306 4 2023-03-15 false 0001866692 Amplitude, Inc. AMPL 0001720216 Harms Christopher C/O AMPLITUDE, INC. 201 THIRD ST., SUITE 200 SAN FRANCISCO CA 94103 false true false false Chief Financial Officer Class A Common Stock 2023-03-15 4 A false 408057.00 0.00 A 408057.00 D Employee Stock Option (Right to Buy) 12.37 2023-03-15 4 A false 241819.00 0.00 A 2033-03-14 Class A Common Stock 241819.00 241819.00 D Each restricted stock unit ("RSU") represents a right to receive one share of the Issuer's Class A Common Stock. The RSUs vest in twelve substantially equal quarterly installments beginning on May 15, 2023, subject to the continued service of the reporting person through each vesting date. Consists of 408,057 RSUs. 1/36th of the shares subject to the option vest on each monthly anniversary measured from February 15, 2023 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the third anniversary of the Vesting Commencement Date, subject to the continued service of the reporting person through each vesting date. /s/ Elizabeth Fisher, as Attorney-in-Fact for Christopher Harms 2023-03-17