24 transactions on file (0 open-market purchases and 1 open-market sale on this page).
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-09-04 | Crook Nathaniel Glenn Chief Commercial Officer Open-market sale | Open-market sale | −300,000 | $12.99 | −3.9M | 1,622,696 |
| 2026-08-17 | Liu Curtis Chief Technology Officer · Director · 10% owner Tax withholding | Tax withholding | −53,878 | $13.03 | −702.03K | 950,316 |
| 2026-08-17 | Skates Spenser CEO and President · Director · 10% owner Tax withholding | Tax withholding | −52,369 | $13.03 | −682.37K | 1,231,188 |
| 2026-08-17 | Crook Nathaniel Glenn Chief Commercial Officer Tax withholding | Tax withholding | −109,368 | $13.03 | −1.43M | 1,922,696 |
| 2026-08-17 | Casey Andrew Chief Financial Officer Tax withholding | Tax withholding | −72,814 | $13.03 | −948.77K | 1,363,338 |
19 more transactions are on Measure
The assistant answers from what AMPL has actually filed: 7 annual reports filed with the SEC, 13F positions from the 1 tracked investor who hold it and 4 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.
Pressing one answers it here, from AMPL's filings and figures. One a day without an account; a free account has its own, and no card.
See every Form 4 AMPL insiders have filed, not the latest few.
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Source
From SEC Form 4 filings, filed by officers, directors and 10%-owners within two business days of a transaction. “Indirect” holdings (a trust, an LLC, a family member) are included and not distinguished from direct ones in this table.
Past transactions say nothing about future ones, and none of this is investment advice.
See who bought, not who was handed shares
Every Form 4 AMPL insiders file, not just the latest handful, with vesting and tax withholding struck out so what's left reads as a decision.
Every filingMeasure
Follow the investors who hold it
Each stake priced at the quarter it was filed, and diffed against the quarter before: who added, who trimmed, who left.
Every position they holdMeasure
Ask what a run of filings adds up to
Whether this is one decision or a pattern, and how it compares with AMPL's own history of insider activity.
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