Open Insider Trading Activity for Amprius Technologies, Inc. Chief Technology Officer Stefan Constantin Ionel
31-day price and insider activity (up to 2 years)
Daily candles with triangles for the buy and sale transactions shown below. Scroll left or zoom out to load earlier candles (up to 2 years).
▲ Insider buy
▼ Insider sale
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| Ticker | Filing Date | Transaction Date | Company | Insider | Title | Transaction | Trade Count | Shares | Avg. Price | Total Value | Position Size Change | SEC Filing |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting AMPX | 2026-05-28 | 2026-05-27 | Amprius Technologies, Inc. | Stefan Constantin Ionel | Chief Technology Officer | Sell | 1 | 3,208 | $17.19 | $55,145.52 | 0.40% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting AMPX | 2026-05-26 | 2026-05-21 | Amprius Technologies, Inc. | Stefan Constantin Ionel | Chief Technology Officer | Sell | 1 | 28,812 | $14.79 | $426,129.48 | 3.46% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting AMPX | 2026-02-24 | 2026-02-23 | Amprius Technologies, Inc. | Stefan Constantin Ionel | Chief Technology Officer | Sell | 1 | 25,366 | $10.16 | $257,718.56 | 3.39% | View Filing |
| Explained M/S: sale activity tied to share conversions or derivative-related share movements. AMPX | 2026-01-23 | 2026-01-23 | Amprius Technologies, Inc. | Stefan Constantin Ionel | Chief Technology Officer | Sell | 3 | 567,707 | $12.03 | $6,832,197.08 | 20.18% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting AMPX | 2025-11-25 | 2025-11-21 | Amprius Technologies, Inc. | Stefan Constantin Ionel | Chief Technology Officer | Sell | 1 | 25,024 | $10.08 | $252,241.92 | 2.95% | View Filing |