Form 4 for AMPX Amprius Technologies, Inc.
Accepted 2026-04-02 16:51:04 ET · period of report 2026-04-01 · accession 0001476220-26-000015 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-04-02 16:51 | 2026-04-01 | AMPX | Sun Kang | Dir | M - OptEx | $2.02 | +1.50M | 2.84M | +112% | +$3.03M |
| DM | 2026-04-02 16:51 | 2026-04-01 | AMPX | Sun Kang | Dir | S - Sale+OE | $15.91 | -1.50M | 1.34M | -53% | -$23.86M |
| DM | 2026-04-02 16:51 | 2026-04-01 | AMPX | Sun Kang | Dir | M - OptEx | $2.02 | -1.50M | 1.79M | -46% | -$3.03M |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common stock | 2026-04-01 | M | A | 1,312,505 | $1.78 | 2,654,905 | D | — | — | (F1) The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025. (F2) Includes 1,159,385 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit. |
| 2 | Common | Common stock | 2026-04-01 | M | A | 187,495 | $3.68 | 2,842,400 | D | — | — | (F1) The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025. (F2) Includes 1,159,385 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit. |
| 3 | Common | Common stock | 2026-04-01 | S | D | 1,250,963 | $15.73 | 1,591,437 | D | — | — | (F1) The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025. (F3) The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $15.37 to $16.36, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. (F2) Includes 1,159,385 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit. |
| 4 | Common | Common stock | 2026-04-01 | S | D | 249,037 | $16.78 | 1,342,400 | D | — | — | (F1) The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025. (F4) The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $16.37 to $17.31, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. (F2) Includes 1,159,385 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit. |
| 5 | Derivative | Stock Option (right to buy) | 2026-04-01 | M | D | 1,312,505 | $1.78 | 0 | D | $1.78 · 2022-09-14 to 2031-06-16 | 1,312,505 Common stock | (F1) The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025. |
| 6 | Derivative | Stock Option (right to buy) | 2026-04-01 | M | D | 187,495 | $3.68 | 1,787,007 | D | $3.68 · 2024-10-23 to 2031-12-15 | 187,495 Common stock | (F1) The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025. |