AMPX insider transaction filings
Amprius Technologies, Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-06-16. Screen AMPX transaction legs live →
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-06-16 | 4 | SATTERTHWAITE LIVINGSTON — Director | Grant/award (A): 10,423 @ $0 | EDGAR |
| 2026-06-16 | 4 | Chu Steven — Director | Grant/award (A): 10,423 @ $0 | EDGAR |
| 2026-06-16 | 4 | BAYLESS KATHLEEN A — Director | Grant/award (A): 10,423 @ $0 | EDGAR |
| 2026-06-16 | 4 | DIXON DONALD R — Director | Grant/award (A): 10,423 @ $0 · Sale (S): 85,000 @ $17.17 | EDGAR |
| 2026-06-11 | 4 | DIXON DONALD R — Director | Sale (S): 40,000 @ $19.13 | EDGAR |
| 2026-06-05 | 4 | Stepien Thomas M — Chief Executive Officer, Director | Gift (G): 30,384 @ $0 · Gift (G): 36,914 @ $0 · Gift (G): 36,914 @ $0 · Sale (S): 2,000 @ $20.97 | EDGAR |
| 2026-05-28 | 4 | Stepien Thomas M — Chief Executive Officer, Director | Sale (S): 4,375 @ $17.19 | EDGAR |
| 2026-05-28 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Sale (S): 3,208 @ $17.19 | EDGAR |
| 2026-05-28 | 4 | Sun Kang — Director | Sale (S): 356 @ $17.19 | EDGAR |
| 2026-05-28 | 4 | DIXON DONALD R — Director | Sale (S): 17,895 @ $17.90 | EDGAR |
| 2026-05-26 | 4 | Stepien Thomas M — Chief Executive Officer, Director | Sale (S): 60,702 @ $14.79 | EDGAR |
| 2026-05-26 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Sale (S): 28,812 @ $14.79 | EDGAR |
| 2026-05-26 | 4 | Sun Kang — Director | Sale (S): 67,796 @ $14.79 | EDGAR |
| 2026-05-07 | 4/A | Stepien Thomas M — Chief Executive Officer, Director | Grant/award (A): 200,000 @ $0 | EDGAR |
| 2026-05-07 | 4 | Sun Kang — Director | Grant/award (A): 6,250 @ $0 | EDGAR |
| 2026-04-02 | 4 | Sun Kang — Director | Option exercise (M): 1,312,505 @ $1.78 · Option exercise (M): 187,495 @ $3.68 · Sale (S): 1,250,963 @ $15.73 · Sale (S): 249,037 @ $16.78 · Option exercise (M): 1,312,505 (derivative) @ $1.78 · Option exercise (M): 187,495 (derivative) @ $3.68 | EDGAR |
| 2026-03-24 | 4 | Sun Kang — Director | Sale (S): 152,823 @ $18.69 · Sale (S): 65,046 @ $19.06 | EDGAR |
| 2026-03-13 | 4/A | RODRIGUEZ RICARDO C. — Chief Financial Officer | Grant/award (A): 150,000 @ $0 | EDGAR |
| 2026-03-13 | 4 | HSIEH Wen Hsuan — Director | Option exercise (M): 270,251 @ $2.61 · Sale (S): 282,500 @ $18.55 · Sale (S): 130,646 @ $18.22 · Option exercise (M): 270,251 (derivative) @ $2.61 | EDGAR |
| 2026-03-12 | 4 | Chu Steven — Director | Option exercise (M): 104,132 @ $0.62 · Sale (S): 166,632 @ $17.92 · Option exercise (M): 86,143 @ $2.61 · Option exercise (M): 69,422 @ $0.62 · Sale (S): 100,000 @ $18.65 · Sale (S): 50,000 @ $18.21 · +4 more | EDGAR |
| 2026-03-06 | 4 | Stepien Thomas M — Chief Executive Officer, Director | Grant/award (A): 150,000 @ $0 | EDGAR |
| 2026-03-06 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Grant/award (A): 110,000 @ $0 | EDGAR |
| 2026-03-06 | 4 | RODRIGUEZ RICARDO C. — Chief Financial Officer | Grant/award (A): 150,000 @ $0 | EDGAR |
| 2026-02-24 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Sale (S): 25,366 @ $10.16 | EDGAR |
| 2026-02-24 | 4 | Sun Kang — Director | Sale (S): 61,251 @ $10.16 | EDGAR |
| 2026-01-30 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Option exercise (M): 90 @ $0.62 · Option exercise (M): 39,600 @ $0.05 · Sale (S): 39,690 @ $12.00 · Option exercise (M): 90 (derivative) @ $0 · Option exercise (M): 39,600 (derivative) @ $0 | EDGAR |
| 2026-01-23 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Option exercise (M): 41,563 @ $0.62 · Option exercise (M): 15,834 @ $0.05 · Option exercise (M): 15,883 @ $0.05 · Sale (S): 73,280 @ $12.00 · Option exercise (M): 253,928 @ $0.05 · Option exercise (M): 72,795 @ $0.45 · +11 more | EDGAR |
| 2026-01-20 | 4 | Sun Kang — Director | Option exercise (M): 850,338 @ $2.50 · Option exercise (M): 100,210 @ $1.78 · Sale (S): 950,548 @ $11.07 · Option exercise (M): 43,185 @ $1.78 · Sale (S): 43,185 @ $11.03 · Option exercise (M): 850,338 (derivative) @ $0 · +2 more | EDGAR |
| 2026-01-14 | 4 | Sun Kang — Director | Option exercise (M): 180,802 @ $0.62 · Option exercise (M): 208,264 @ $2.44 · Option exercise (M): 117,201 @ $2.50 · Sale (S): 506,267 @ $10.10 · Option exercise (M): 180,802 (derivative) @ $0 · Option exercise (M): 208,264 (derivative) @ $0 · +1 more | EDGAR |
| 2025-12-22 | 4 | Stepien Thomas M — President, Director | Grant/award (A): 200,000 @ $0 | EDGAR |
| 2025-12-15 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Option exercise (M): 125,000 @ $0.05 · Sale (S): 198,255 @ $10.51 · Option exercise (M): 125,000 (derivative) @ $0 | EDGAR |
| 2025-11-25 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Sale (S): 25,024 @ $10.08 | EDGAR |
| 2025-11-25 | 4 | Sun Kang — Chief Executive Officer, Director | Sale (S): 68,655 @ $10.08 | EDGAR |
| 2025-11-19 | 4 | Sun Kang — Chief Executive Officer, Director | Option exercise (M): 202,934 @ $0.98 · Option exercise (M): 727,950 @ $0.05 · Option exercise (M): 27,463 @ $0.62 · Option exercise (M): 41,653 @ $0.62 · Sale (S): 1,000,000 @ $10.60 · Option exercise (M): 202,934 (derivative) @ $0 · +3 more | EDGAR |
| 2025-10-08 | 4 | RODRIGUEZ RICARDO C. — Chief Financial Officer | Grant/award (A): 200,000 @ $0 | EDGAR |
| 2025-08-25 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Sale (S): 19,159 @ $6.82 | EDGAR |
| 2025-08-25 | 4 | Wallach Sandra — Chief Financial Officer | Sale (S): 28,390 @ $6.82 | EDGAR |
| 2025-08-25 | 4 | Sun Kang — Chief Executive Officer, Director | Sale (S): 65,654 @ $6.82 | EDGAR |
| 2025-06-17 | 4 | HSIEH Wen Hsuan — Director | Grant/award (A): 44,444 @ $0 | EDGAR |
| 2025-06-17 | 4 | SATTERTHWAITE LIVINGSTON — Director | Grant/award (A): 44,444 @ $0 | EDGAR |
| 2025-06-17 | 4 | Chu Steven — Director | Grant/award (A): 44,444 @ $0 | EDGAR |
| 2025-06-17 | 4 | BAYLESS KATHLEEN A — Director | Grant/award (A): 44,444 @ $0 | EDGAR |
| 2025-06-17 | 4 | DIXON DONALD R — Director | Grant/award (A): 44,444 @ $0 | EDGAR |
| 2025-05-23 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Sale (S): 20,366 @ $2.43 | EDGAR |
| 2025-05-23 | 4 | Wallach Sandra — Chief Financial Officer | Sale (S): 27,595 @ $2.43 | EDGAR |
| 2025-05-23 | 4 | Sun Kang — Chief Executive Officer, Director | Sale (S): 69,786 @ $2.43 | EDGAR |
| 2025-05-06 | 4 | Stepien Thomas M — President, Director | Grant/award (A): 400,000 @ $0 | EDGAR |
| 2025-03-21 | 4 | Stefan Constantin Ionel — Chief Technology Officer | Grant/award (A): 461,540 @ $0 | EDGAR |
| 2025-03-21 | 4 | Wallach Sandra — Chief Financial Officer | Grant/award (A): 383,260 @ $0 | EDGAR |
| 2025-03-21 | 4 | Sun Kang — Chief Executive Officer, Director | Grant/award (A): 599,400 @ $0 | EDGAR |
Recent 8-K events — Amprius Technologies, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-13 | 8-K | 1.01 — Entry into a Material Definitive Agreement 2.03 — Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-08-04 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-17 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-05-19 | 8-K/A | 3.02 — Unregistered Sales of Equity Securities | EDGAR |
| 2026-05-07 | 8-K | 1.01 — Entry into a Material Definitive Agreement 3.02 — Unregistered Sales of Equity Securities 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-06 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-21 | 8-K | 4.01 — Changes in Registrant's Certifying Accountant | EDGAR |
| 2026-03-04 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-03 | 8-K | 1.02 — Termination of a Material Definitive Agreement | EDGAR |
| 2026-01-12 | 8-K | 8.01 — Other Events | EDGAR |
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