Thomas M. Stepien
CIK: 0002067233
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Amprius Technologies, Inc.
Discretionary Trading P&L
Holdings
Transaction History (17 total)
- Aug 25, 2026AMPX
Amprius Technologies, Inc.
Gift(G)Direct5K shares- - Aug 25, 2026AMPX
Amprius Technologies, Inc.
Award(A)Indirect346 shares- - Aug 25, 2026AMPX
Amprius Technologies, Inc.
Gift(G)Direct346 shares- - Aug 25, 2026AMPX
Amprius Technologies, Inc.
Gift(G)Direct5K shares- - Aug 25, 2026AMPX
Amprius Technologies, Inc.
Gift(G)Direct5K shares- - Aug 24, 2026AMPX
Amprius Technologies, Inc.
Sale(S)Direct8K shares at avg. $10.03$80K - Aug 21, 2026AMPX
Amprius Technologies, Inc.
Sale(S)Direct23.5K shares at avg. $10.34$243K - Jun 4, 2026AMPX
Amprius Technologies, Inc.
Sale(S)Direct2K shares at avg. $20.97$42K - Jun 4, 2026AMPX
Amprius Technologies, Inc.
Gift(G)Direct30.4K shares- - Jun 4, 2026AMPX
Amprius Technologies, Inc.
Gift(G)Direct36.9K shares- - Jun 4, 2026AMPX
Amprius Technologies, Inc.
Gift(G)Indirect36.9K shares- - May 27, 2026AMPX
Amprius Technologies, Inc.
Sale(S)Direct4.4K shares at avg. $17.19$75K - May 21, 2026AMPX
Amprius Technologies, Inc.
Sale(S)Direct60.7K shares at avg. $14.79$898K - Mar 4, 2026AMPX
Amprius Technologies, Inc.
Award(A)Direct150K shares- - Dec 19, 2025AMPX
Amprius Technologies, Inc.
Award(A)Direct200K shares- - Dec 19, 2025AMPX
Amprius Technologies, Inc.
Award(A)Direct200K shares- - May 1, 2025AMPX
Amprius Technologies, Inc.
Award(A)Direct400K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 25, 2026 | AMPX Amprius Technologies, Inc. | Gift(G) | 5,000 | - | $0 | Direct |
| Aug 25, 2026 | AMPX Amprius Technologies, Inc. | Award(A) | 346 | - | $0 | Indirect |
| Aug 25, 2026 | AMPX Amprius Technologies, Inc. | Gift(G) | 346 | - | $0 | Direct |
| Aug 25, 2026 | AMPX Amprius Technologies, Inc. | Gift(G) | 5,000 | - | $0 | Direct |
| Aug 25, 2026 | AMPX Amprius Technologies, Inc. | Gift(G) | 5,000 | - | $0 | Direct |
| Aug 24, 2026 | AMPX Amprius Technologies, Inc. | Sale(S) | 8,000 | $10.03 | $80,240 | Direct |
| Aug 21, 2026 | AMPX Amprius Technologies, Inc. | Sale(S) | 23,529 | $10.34 | $243,313 | Direct |
| Jun 4, 2026 | AMPX Amprius Technologies, Inc. | Sale(S) | 2,000 | $20.97 | $41,940 | Direct |
| Jun 4, 2026 | AMPX Amprius Technologies, Inc. | Gift(G) | 30,384 | - | $0 | Direct |
| Jun 4, 2026 | AMPX Amprius Technologies, Inc. | Gift(G) | 36,914 | - | $0 | Direct |
| Jun 4, 2026 | AMPX Amprius Technologies, Inc. | Gift(G) | 36,914 | - | $0 | Indirect |
| May 27, 2026 | AMPX Amprius Technologies, Inc. | Sale(S) | 4,375 | $17.19 | $75,222 | Direct |
| May 21, 2026 | AMPX Amprius Technologies, Inc. | Sale(S) | 60,702 | $14.79 | $897,685 | Direct |
| Mar 4, 2026 | AMPX Amprius Technologies, Inc. | Award(A) | 150,000 | - | $0 | Direct |
| Dec 19, 2025 | AMPX Amprius Technologies, Inc. | Award(A) | 200,000 | - | $0 | Direct |
| Dec 19, 2025 | AMPX Amprius Technologies, Inc. | Award(A) | 200,000 | - | - | Direct |
| May 1, 2025 | AMPX Amprius Technologies, Inc. | Award(A) | 400,000 | - | - | Direct |
1-17 of 17 transactions
About Stepien Thomas M
Stepien Thomas M (SEC CIK 0002067233) files insider reports with the SEC as Chief Executive Officer of Amprius Technologies, Inc. (AMPX).
Signal8 holds 10 ownership filings by Stepien Thomas M (2 Form 3, 8 Form 4), filed between May 6, 2025 and Aug 25, 2026. Those filings report 17 transactions, from May 1, 2025 to Aug 25, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Stepien Thomas M's filings is in FREMONT, CA.
Recent filings by Stepien Thomas M
Other insiders filing for Amprius Technologies, Inc. (AMPX)
- Sun Kang, Director
- Stefan Constantin Ionel, Chief Technology Officer
- BAYLESS KATHLEEN A, Director
- SATTERTHWAITE LIVINGSTON, Director
- DIXON DONALD R, Director
- Chu Steven, Director