X0306 4 2022-06-09 false 0001866692 Amplitude, Inc. AMPL 0001700423 Grady Patrick W 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 true false true false Class A Common Stock 2022-06-09 4 A false 9943.00 0.00 A 9943.00 D Class A Common Stock 2225077.00 I Sequoia Capital U.S. Growth Fund IX, L.P. Class A Common Stock 242788.00 I Sequoia Capital U.S. Growth IX Principals Fund, L.P. Class A Common Stock 95885.00 I Sequoia Capital U.S. Growth Partners Fund IX, L.P. Class A Common Stock 235201.00 I Sequoia Capital U.S. Venture 2010 - Seed Fund, L.P. Represents restricted stock units ("RSUs") that were granted pursuant to the Issuer's Non-Employee Director Compensation Program (the "Program"). Each RSU represents a right to receive one share of Class A Common Stock. The RSUs will vest in full on the earlier of (i) June 9, 2023 or (ii) immediately before the Issuer's 2023 annual meeting of stockholders, subject to the reporting person's continued service on the Board through such vesting date. SC US (TTGP), Ltd. is (i) the general partner of SC U.S. Venture 2010 Management, L.P., which is the general partner of Sequoia Capital U.S. Venture 2010-Seed Fund, L.P., and (ii) the general partner of SC U.S. Growth IX Management, L.P., which is the general partner of Sequoia Capital U.S. Growth Fund IX, L.P., Sequoia Capital U.S. Growth Partners Fund IX, L.P., and Sequoia Capital U.S. Growth IX Principals Fund, L.P. The Reporting Person is a Director of SC US (TTGP), Ltd. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. /s/ Jung Yeon Son, Attorney-in-Fact 2022-06-10