Stepien Thomas M
SEC CIK 2067233 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| AMPX | Amprius Technologies, Inc. | Pres, Dir | 578.8K | — | $1.34M | 12 | 2025-05-01 | 2026-08-25 |
Most active insiders at AMPX, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Sun Kang | Dir | — | $57.63M |
| 2 | Stefan Constantin Ionel | CTO | — | $10.69M |
| 3 | HSIEH Wen Hsuan | Dir | — | $7.62M |
| 4 | Chu Steven | Dir | — | $5.86M |
| 5 | DIXON DONALD R | Dir | — | $2.54M |
| 6 | Stepien Thomas M | Pres, Dir | — | $1.34M |
| 7 | RODRIGUEZ RICARDO C. | CFO | — | — |
| 8 | SATTERTHWAITE LIVINGSTON | Dir | — | — |
| 9 | BAYLESS KATHLEEN A | Dir | — | — |
Transactions 12
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 2026-08-25 17:21 | 2026-08-21+ | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | S - Sale | $10.26 | -31.5K | 594.1K | -5% | -$323.6K |
| M | 2026-08-25 17:21 | 2026-08-25 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | G - Gift | $0.00 | -15.3K | 578.8K | -3% | $0 |
| I | 2026-08-25 17:21 | 2026-08-25 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | A - Grant | $0.00 | +346 | 37.3K | +0.9% | $0 |
| M | 2026-06-05 16:57 | 2026-06-04 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | G - Gift | $0.00 | -67.3K | 627.6K | -10% | $0 |
| I | 2026-06-05 16:57 | 2026-06-04 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | G - Gift | $0.00 | +36.9K | 36.9K | New | $0 |
| 2026-06-05 16:57 | 2026-06-04 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | S - Sale | $20.97 | -2,000 | 625.6K | -0.3% | -$41.9K | |
| 2026-05-28 18:22 | 2026-05-27 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | S - Sale | $17.19 | -4,375 | 694.9K | -0.6% | -$75.2K | |
| 2026-05-26 19:03 | 2026-05-21 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | S - Sale | $14.79 | -60.7K | 699.3K | -8% | -$897.7K | |
| A | 2026-05-07 16:53 | 2025-12-19 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | A - Grant | $0.00 | +200.0K | 760.0K | +36% | $0 |
| 2026-03-06 | 2026-03-04 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | CEO, Dir | A - Grant | $0.00 | +150.0K | 760.0K | +25% | $0 | |
| 2025-12-22 | 2025-12-19 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | Pres, Dir | A - Grant | $0.00 | +200.0K | 610.0K | +49% | $0 | |
| 2025-05-06 | 2025-05-01 | AMPX | Amprius Technologies, Inc. | Stepien Thomas M | Pres, Dir | A - Grant | $0.00 | +400.0K | 400.0K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations