Form 4 for AMPH Amphastar Pharmaceuticals, Inc.
Accepted 2026-08-11 16:57:01 ET · period of report 2026-08-07 · accession 0001263136-26-000012 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-08-11 16:57 | 2026-08-07 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $19.79 | +5,053 | 181.0K | +3% | +$100.0K |
| DT | 2026-08-11 16:57 | 2026-08-07 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $22.48 | -8,180 | 172.8K | -5% | -$183.9K |
| DT | 2026-08-11 16:57 | 2026-08-07 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $0.00 | -5,053 | 0 | -100% | $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 | 2026-08-07 | M | A | 5,053 | $19.79 | 181,026 | D | — | — | (F1) Includes 910 shares acquired on May 31, 2026 under the Issuer's 2014 Employee Stock Purchase Plan. |
| 2 | Common | Common Stock | 2026-08-07 | S | D | 8,180 | $22.48 | 172,846 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 10, 2026. |
| 3 | Derivative | Employee Stock Option (right to buy) | 2026-08-07 | M | D | 5,053 | $0.00 | 0 | D | $19.79 · — to 2028-03-15 | 5,053 Common Stock | (F3) Shares subject to the option are fully vested and immediately exercisable. |