Updated Jul 16, 2026 · Last SEC filing 2026-07-10
Amplitude, Inc. (AMPL) has filed 20 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-10. 2 Form 8-K material event filings were reported by AMPL in the last 90 days. 3 Form 144 notices of proposed sale were filed for AMPL stock. InsiderAlpha tracks every AMPL SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Services-Prepackaged Software (SIC 7372) |
|---|---|
| SEC CIK | 0001866692 |
| Form 4 filings (90d) | 20 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 3 |
| Latest Form 4 filing | 2026-07-10 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Schultz Erica | Insider | A — Grant or award | 1.7K | $0.00 | — | SEC | |
| Tzuo Tien | Insider | A — Grant or award | 1.5K | $0.00 | — | SEC | |
| Wong Catherine | Insider | S — Open-market sale | 7.5K | $6.79 | $51K | SEC | |
| Schultz Erica | Insider | A — Grant or award | 24.9K | $0.00 | — | SEC | |
| Wong Catherine | Insider | A — Grant or award | 24.9K | $0.00 | — | SEC | |
| Whitehurst James M | Insider | A — Grant or award | 24.9K | $0.00 | — | SEC | |
| Grady Patrick W | Insider | A — Grant or award | 24.9K | $0.00 | — | SEC | |
| Gill Ronald S | Insider | A — Grant or award | 24.9K | $0.00 | — | SEC | |
| Liu Curtis | Chief Technology Officer | S — Open-market sale | 22.2K | $8.03 | $178K | SEC | |
| Liu Curtis | Chief Technology Officer | S — Open-market sale | 22.8K | $8.03 | $183K | SEC | |
| Casey Andrew | Chief Financial Officer | F — Tax withholding / forfeiture | 64.9K | $6.06 | $393K | SEC | |
| Skates Spenser | CEO and President | F — Tax withholding / forfeiture | 39.6K | $6.06 | $240K | SEC | |
| Crook Nathaniel Glenn | Chief Commercial Officer | F — Tax withholding / forfeiture | 101.3K | $6.06 | $614K | SEC | |
| Liu Curtis | Chief Technology Officer | F — Tax withholding / forfeiture | 40.3K | $6.06 | $244K | SEC | |
| Liu Curtis | Chief Technology Officer | S — Open-market sale | 17.6K | $8.12 | $143K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Amplitude, Inc. (AMPL). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Liu Curtis | 7 | $748K |
| Crook Nathaniel Glenn | 3 | $614K |
| Wong Catherine | 2 | $51K |
| Skates Spenser | 2 | $240K |
| Schultz Erica | 2 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in AMPL insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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