AMPX (Amprius Technologies, Inc.)
Insider Trading Activity
Every open-market purchase and sale reported by AMPX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-25 | Kang Sun | Director | Sell | — | — |
| 2026-08-25 | Constantin Ionel Stefan | Chief Technology Officer | Sell | — | — |
| 2026-08-25 | Thomas M Stepien | Chief Executive Officer | MIXED | — | — |
| 2007-07-25 | Charles W. Dyke | Director | A | — | — |
| 2007-07-02 | JOEL D TALCOTT | Vice President | A | — | — |
| 2007-07-02 | RAMON C H VENEMA | VP, Asst Treasurer, Asst Sec. | A | — | — |
| 2007-07-02 | ROBERT L ATCHISON | Vice President | A | — | — |
| 2007-07-02 | SHARON M GENBERG | Vice President | A | — | — |
| 2007-05-22 | DOUGLAS T MCCLURE JR | Director | A | — | — |
| 2007-05-22 | ALAIN C BRIANCON | Director | A | — | — |
| 2007-05-22 | RAMON C H VENEMA | VP, Asst Treasurer, Asst Sec. | A | — | — |
| 2007-05-22 | SHARON M GENBERG | Vice President | A | — | — |
| 2007-05-22 | PETER SLUSSER | Director | A | — | — |
| 2007-05-22 | JOEL D TALCOTT | Vice President | A | — | — |
| 2007-05-22 | ROBERT L ATCHISON | Vice President | A | — | — |
| 2007-05-22 | Ned S Goldstein | Director | A | — | — |
| 2007-04-06 | SHARON M GENBERG | Vice President | M | — | — |
| 2007-04-06 | RAMON C H VENEMA | VP, Asst Treasurer, Asst Sec. | M | — | — |
| 2007-04-05 | CRAIG L MCKIBBEN | Vice Pres., Treasurer & CFO | MIXED | — | — |
| 2007-04-05 | JOEL D TALCOTT | Vice President | MIXED | — | — |
| 2007-03-12 | JOEL D TALCOTT | Vice President | MIXED | — | — |
| 2007-03-12 | CRAIG L MCKIBBEN | Vice Pres., Treasurer & CFO | MIXED | — | — |
| 2007-03-08 | JOEL D TALCOTT | Vice President | MIXED | — | — |
| 2007-02-21 | D GORDON STRICKLAND | CEO, President & Director | A | — | — |
| 2007-02-15 | CRAIG L MCKIBBEN | Vice Pres., Treasurer & CFO | MIXED | — | — |
| 2007-02-15 | CRAIG L MCKIBBEN | Vice Pres., Treasurer & CFO | MIXED | — | — |
| 2007-02-09 | CRAIG L MCKIBBEN | Vice Pres., Treasurer & CFO | MIXED | — | — |
| 2007-02-06 | JOEL D TALCOTT | Vice President | MIXED | — | — |
| 2007-01-16 | CRAIG L MCKIBBEN | Vice Pres., Treasurer & CFO | MIXED | — | — |
| 2007-01-09 | JOEL D TALCOTT | Vice President | MIXED | — | — |
| 2007-01-08 | CRAIG L MCKIBBEN | Vice Pres., Treasurer & CFO | MIXED | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 1,274,803 | — |
| — | Chief Technology Officer | 771,629 | — |
| — | Chief Executive Officer | 631,356 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the AMPX quote page; the site-wide leaderboard is on the insider transactions hub.