SEC Form 4/A · accession 0001610717-26-000228
Amplitude, Inc. · AMPL
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
This is an amendment (Form 4/A). It replaces an earlier filing for the same period.
Reporting owner
Curtis Liu
Officer — Chief Technology Officer · Director · 10% Owner
Period of report
Jun 1, 2026
Accepted (ET)
Jun 16, 2026 · 5:15 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001866692
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Class A Common StockF1,F2,F3,F4 | Jun 1, 2026 | S | 22,786 | $8.0259 | D | 1,004,194 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on November 26, 2025.
- F2This Form 4/A is being filed solely to correct the number of shares reported as sold on June 1, 2026 and the total number of shares owned following the transaction. Due to a broker administrative error, 585 fewer shares were sold than were required pursuant to the Reporting Person's Rule 10b5-1 trading plan. The error was corrected through the broker's error account, with the broker crediting the Reporting Person for the additional 585 shares at the applicable June 1, 2026 sale price and absorbing the cost of the correction. No additional open-market sale was effected in connection with the correction.
- F3This transaction was executed in multiple trades at prices ranging from $8.0000 to $8.0600. 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.
- F4Includes 880,520 restricted stock units.