X0306 4 2021-11-12 false 0001866692 Amplitude, Inc. AMPL 0001883017 Heinz Matthew C/O AMPLITUDE, INC. 201 THIRD ST., SUITE 200 SAN FRANCISCO CA 94103 false true false false Chief Revenue Officer Class A Common Stock 2021-11-12 4 M false 135000.00 2.26 A 179247.00 D Class A Common Stock 2021-11-12 4 S false 64070.00 72.6939 D 115177.00 D Class A Common Stock 2021-11-12 4 S false 37909.00 73.5863 D 77268.00 D Class A Common Stock 2021-11-12 4 S false 29551.00 74.4718 D 47717.00 D Class A Common Stock 2021-11-12 4 S false 3470.00 75.2454 D 44247.00 D Stock Option (Right to Buy) 2.26 2021-11-12 4 M false 135000.00 0.00 D 2029-10-31 Class A Common Stock 135000.00 925753.00 D This transaction was executed in multiple trades at prices ranging from $72.09 to $73.08. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $73.09 to $74.08. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $74.09 to $75.08. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $75.14 to $75.40. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The option is early exercisable. 25% of the shares subject to the option vest on the first anniversary measured from October 15, 2019 (the "Vesting Commencement Date"), and 1/48th of the total number of shares vest monthly thereafter, such that 100% of the shares subject to the option will be fully vested on the fourth anniversary of the Vesting Commencement Date. /s/ Hoang Vuong, as Attorney-in-Fact for Mathew Heinz 2021-11-16