X0508 4 2025-06-12 false 0001866692 Amplitude, Inc. AMPL 0001744910 Wong Catherine C/O AMPLITUDE,INC. 201 THIRD ST., SUITE 200 SAN FRANCISCO CA 94103 true false false false false Class A Common Stock 2025-06-12 4 A false 14906.00 0.00 A 94058.00 D 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 12, 2026 or (ii) immediately before the Issuer's 2026 annual meeting of stockholders, subject to the reporting person's continued service on the Board through such vesting date. Includes 14,906 RSUs. /s/ Elizabeth Fisher, as attorney in fact for Wong Catherine 2025-06-16