X0306 4 2022-05-17 false 0001866692 Amplitude, Inc. AMPL 0001883039 Sarkis Ninos C/O AMPLITUDE, INC. 201 THIRD ST., SUITE 200 SAN FRANCISCO CA 94103 false true false false Chief Accounting Officer Class A Common Stock 2022-05-17 4 S false 279.00 16.7177 D 46455.00 D Class A Common Stock 2022-05-17 4 S false 232.00 17.2903 D 46223.00 D Pursuant to a mandatory sell-to-cover provision under the Issuer's 2021 Incentive Award Plan, the shares were sold upon the vesting of restricted stock units ("RSUs") solely to cover applicable withholding taxes This transaction was executed in multiple trades in prices ranging from $16.1300 to $17.1200, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. Includes 9,072 RSUs This transaction was executed in multiple trades in prices ranging from $17.1400 to $17.7400, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. /s/ Hoang Vuong, as Attorney-in-Fact for Ninos Sarkis 2022-05-19