Form 4 for AMPH Amphastar Pharmaceuticals, Inc.
Accepted 2026-03-11 00:00:00 ET · period of report 2026-03-09 · accession 0001263136-26-000008 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-03-11 | 2026-03-10 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $18.91 | -3,297 | 177.0K | -2% | -$62.3K |
| D | 2026-03-11 | 2026-03-09 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +58.7K | 180.3K | +48% | $0 |
| D | 2026-03-11 | 2026-03-09 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +121.1K | 121.1K | New | $0 |
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 | 2026-03-10 | F | D | 3,297 | $18.91 | 177,036 | D | — | — | (F2) The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of RSUs. |
| 2 | Common | Common Stock | 2026-03-09 | A | A | 58,693 | $0.00 | 180,333 | D | — | — | (F1) The reported shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on March 9, 2027. |
| 3 | Derivative | Employee Stock Option (right to buy) | 2026-03-09 | A | A | 121,071 | $0.00 | 121,071 | D | $19.21 · — to 2036-03-09 | 121,071 Common Stock | (F3) The shares subject to the option vest in four equal annual installments beginning on March 9, 2027. |