Thomas M. Stepien
President at Amprius Technologies Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 2 years
- Director since
- 2025
2 years of board service in total across 1 board, counting each seat separately. Longest: Amprius Technologies Inc., 1 year.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Amprius Technologies Inc. June 11, 202676.4%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 25, 2026 | Amprius Technologies Inc. | Gift | −5,000 | — | — |
| Aug 25, 2026 | Amprius Technologies Inc. | Gift | −5,000 | — | — |
| Aug 25, 2026 | Amprius Technologies Inc. | Gift | −5,000 | — | — |
| Aug 25, 2026 | Amprius Technologies Inc. | Gift | −346 | — | — |
| Aug 25, 2026 | Amprius Technologies Inc. | Grant or award | +346 | — | — |
| Aug 24, 2026 | Amprius Technologies Inc. | Open-market sale | −8,000 | $10.03 | $80,240 |
| Aug 21, 2026 | Amprius Technologies Inc. | Open-market sale | −23,529 | $10.34 | $243,290 |
| Jun 4, 2026 | Amprius Technologies Inc. | Gift | −30,384 | — | — |
| Jun 4, 2026 | Amprius Technologies Inc. | Gift | −36,914 | — | — |
| Jun 4, 2026 | Amprius Technologies Inc. | Gift | +36,914 | — | — |
| Jun 4, 2026 | Amprius Technologies Inc. | Open-market sale | −2,000 | $20.97 | $41,940 |
| May 27, 2026 | Amprius Technologies Inc. | Open-market sale | −4,375 | $17.19 | $75,206 |
| May 21, 2026 | Amprius Technologies Inc. | Open-market sale | −60,702 | $14.79 | $897,783 |
| Mar 4, 2026 | Amprius Technologies Inc. | Grant or award | +150,000 | — | — |
| Dec 19, 2025 | Amprius Technologies Inc. | Grant or award | +200,000 | — | — |
Questions about Thomas M. Stepien
What boards is Thomas M. Stepien on?
Thomas M. Stepien sits on the board of Amprius Technologies Inc.
What company is Thomas M. Stepien the CEO of?
Thomas M. Stepien is Chief Executive Officer of Amprius Technologies Inc.
How long has Thomas M. Stepien served on boards?
Our records show at least 2 years of board service across 1 board, the earliest from 2025.
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