X0508 4 2025-06-11 false 0001866692 Amplitude, Inc. AMPL 0001542687 Schultz Erica C/O AMPLITUDE, INC. 201 THIRD ST., SUITE 200 SAN FRANCISCO CA 94103 true false false false true Class A Common Stock 2025-06-11 4 S false 26394.00 12.4926 D 92500.00 D The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on March 12, 2025. This transaction was executed in multiple trades in prices ranging from $12.3000 to $12.6800, 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/ Elizabeth Fisher, as attorney in fact for Schultz Erica 2025-06-13