Form 4 for AMPH Amphastar Pharmaceuticals, Inc.
Accepted 2026-06-03 21:20:03 ET · period of report 2026-06-01 · accession 0001379941-26-000003 · 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 | 2026-06-03 21:20 | 2026-06-01 | AMPH | Lee Howard | Dir | A - Grant | $0.00 | +8,143 | 160.1K | +5% | $0 |
| D | 2026-06-03 21:20 | 2026-06-02 | AMPH | Lee Howard | Dir | F - Tax | $18.45 | -769 | 159.3K | -0.5% | -$14.2K |
| D | 2026-06-03 21:20 | 2026-06-01 | AMPH | Lee Howard | Dir | A - Grant | $0.00 | +17.4K | 17.4K | 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 | 2026-06-01 | A | A | 8,143 | $0.00 | 160,119 | D | — | — | (F1) The reported shares are represented by restricted stock units, or RSUs, all of which vest on June 1, 2027. |
| 2 | Common | Common Stock | 2026-06-02 | F | D | 769 | $18.45 | 159,350 | D | — | — | (F2) The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of RSUs. |
| 3 | Derivative | Stock Option (right to buy) | 2026-06-01 | A | A | 17,365 | $0.00 | 17,365 | D | $18.42 · — to 2036-06-01 | 17,365 Common Stock | (F3) All of the shares subject to the option vest on June 1, 2027. |