Stefan Constantin Ionel's Form 4 filing
Amprius Technologies, Inc. (AMPX) · filed Jan 23, 2026
- Accession no.
- 0001940928-26-000002
- Filed
- Jan 23, 2026, 5:36 PM ET
- Trade date
- Jan 21-23, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Not checked
This filing lists 10 non-derivative transactions and 7 derivative transactions. Open-market sales total $6.83M. It was filed 2 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Stefan Constantin IonelCIK 0001940928 | Officer (Chief Technology Officer) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Jan 21, 2026 | Common stock | MOption exerciseAcquired | +41,563 | $0.62 | +$25,769.06 | 790,259 | Direct | |
| Jan 21, 2026 | Common stock | MOption exerciseAcquired | +15,834 | $0.05 | +$791.7 | 806,093 | Direct | |
| Jan 21, 2026 | Common stock | MOption exerciseAcquired | +15,883 | $0.05 | +$794.15 | 821,976 | Direct | |
| Jan 21, 2026 | Common stock | SSaleDisposed | −73,280 | $12.00 | −$879,411.3 | 748,696 | Direct | |
| Jan 22, 2026 | Common stock | MOption exerciseAcquired | +253,928 | $0.05 | +$12,696.4 | 1,002,624 | Direct | |
| Jan 22, 2026 | Common stock | MOption exerciseAcquired | +72,795 | $0.45 | +$32,757.75 | 1,075,419 | Direct | |
| Jan 22, 2026 | Common stock | MOption exerciseAcquired | +166,104 | $0.05 | +$8,305.2 | 1,241,523 | Direct | |
| Jan 22, 2026 | Common stock | SSaleDisposed | −492,827 | $12.04 | −$5,931,912.19 | 748,696 | Direct | |
| Jan 23, 2026 | Common stock | MOption exerciseAcquired | +1,600 | $0.05 | +$80 | 750,296 | Direct | |
| Jan 23, 2026 | Common stock | SSaleDisposed | −1,600 | $12.00 | −$19,200 | 748,696 | Direct |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Jan 21, 2026 | Common stock | MOption exerciseDisposed | −41,563 | $0.00 | $0 | 90 | Direct | |
| Jan 21, 2026 | Common stock | MOption exerciseDisposed | −15,834 | $0.00 | $0 | 295,128 | Direct | |
| Jan 21, 2026 | Common stock | MOption exerciseDisposed | −15,883 | $0.00 | $0 | 166,104 | Direct | |
| Jan 22, 2026 | Common stock | MOption exerciseDisposed | −253,928 | $0.00 | $0 | 41,200 | Direct | |
| Jan 22, 2026 | Common stock | MOption exerciseDisposed | −72,795 | $0.00 | $0 | 0 | Direct | |
| Jan 22, 2026 | Common stock | MOption exerciseDisposed | −166,104 | $0.00 | $0 | 0 | Direct | |
| Jan 23, 2026 | Common stock | MOption exerciseDisposed | −1,600 | $0.00 | $0 | 39,600 | Direct |
Footnotes
Livermore does not store Form 4 footnotes. For price ranges, how indirect holdings are held and trading plan details, read the original on SEC EDGAR.