Amphastar Pharmaceuticals, Inc. (AMPH)
Nasdaq · Pharmaceutical Preparations
What they're doing
Between 2026-06-21 and 2026-09-19, public records show 1 signal for Amphastar Pharmaceuticals, Inc.. Most notable: 2026-07-13: Filed 8-K disclosing director or officer change. Federal contract obligations over the last 24 months total $0. This summary was assembled automatically from SEC EDGAR, USAspending.gov, U.S. Senate lobbying disclosures and Wikimedia pageview counts.
Generated 2026-09-19 from public records.
Signals, last 12 months
- Material 8-K filingFiled 8-K disclosing director or officer change
- Material 8-K filingFiled 8-K disclosing director or officer change
- Material 8-K filingFiled 8-K disclosing material agreement
- Material 8-K filingFiled 8-K disclosing material agreement
- Material 8-K filingFiled 8-K disclosing material agreement
Insider transactions
| Date | Insider | Role | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-16 | Zhou Rong | officer | S | 10,000 | 23.94 | $239,404 |
| 2026-09-16 | Zhou Rong | officer | M | 10,000 | 13.35 | $133,500 |
| 2026-09-02 | Zhou Rong | officer | S | 3,187 | 23.63 | $75,306 |
| 2026-08-11 | PRINS RICHARD K | director | S | 7,973 | 20.3 | $161,852 |
| 2026-08-07 | PETERS WILLIAM J | director | M | 5,053 | 19.79 | $99,999 |
| 2026-08-07 | PETERS WILLIAM J | director | S | 8,180 | 22.48 | $183,886 |
| 2026-07-09 | Pierce Anthony T | director | A | 7,886 | 0 | $0 |
| 2026-06-02 | Lee Howard | director | F | 769 | 18.45 | $14,188 |
| 2026-06-02 | Lee Howard | director | F | 769 | 18.45 | $14,188 |
| 2026-06-01 | PRINS RICHARD K | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Lee Howard | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | ZASLOFF MICHAEL A | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Gerst Diane G. | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Gaugh David Russell | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Deflin Gayle | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | PRINS RICHARD K | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Lee Howard | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | ZASLOFF MICHAEL A | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Gerst Diane G. | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Gaugh David Russell | director | A | 8,143 | 0 | $0 |
| 2026-06-01 | Deflin Gayle | director | A | 8,143 | 0 | $0 |
| 2026-03-15 | Liawatidewi Yakob | director | F | 1,033 | 18.18 | $18,780 |
| 2026-03-15 | Zhou Rong | officer | F | 1,225 | 18.18 | $22,271 |
| 2026-03-15 | PETERS WILLIAM J | director | F | 1,973 | 18.18 | $35,869 |
| 2026-03-15 | Zhang Jack Y. | director | F | 9,784 | 18.18 | $177,873 |
| 2026-03-15 | Zhang Jack Y. | director | F | 2,908 | 18.18 | $52,867 |
| 2026-03-15 | Liawatidewi Yakob | director | F | 1,033 | 18.18 | $18,780 |
| 2026-03-15 | Zhou Rong | officer | F | 1,225 | 18.18 | $22,271 |
| 2026-03-15 | PETERS WILLIAM J | director | F | 1,973 | 18.18 | $35,869 |
| 2026-03-15 | Zhang Jack Y.; Luo Mary Z. | director | F | 9,784 | 18.18 | $177,873 |
| 2026-03-15 | Zhang Jack Y.; Luo Mary Z. | director | F | 2,908 | 18.18 | $52,867 |
| 2026-03-10 | PETERS WILLIAM J | director | F | 3,297 | 18.91 | $62,346 |
| 2026-03-10 | Zhou Rong | officer | F | 2,215 | 18.91 | $41,886 |
| 2026-03-10 | Liawatidewi Yakob | director | F | 1,870 | 18.91 | $35,362 |
| 2026-03-10 | Zhang Jack Y. | director | F | 4,395 | 18.91 | $83,109 |
| 2026-03-10 | Zhang Jack Y. | director | F | 14,785 | 18.91 | $279,584 |
| 2026-03-10 | PETERS WILLIAM J | director | F | 3,297 | 18.91 | $62,346 |
| 2026-03-10 | Zhou Rong | officer | F | 2,215 | 18.91 | $41,886 |
| 2026-03-10 | Liawatidewi Yakob | director | F | 1,870 | 18.91 | $35,362 |
| 2026-03-10 | Zhang Jack Y.; Luo Mary Z. | director | F | 14,785 | 18.91 | $279,584 |
| 2026-03-10 | Zhang Jack Y.; Luo Mary Z. | director | F | 4,395 | 18.91 | $83,109 |
| 2026-03-09 | PETERS WILLIAM J | director | A | 58,693 | 0 | $0 |
| 2026-03-09 | Zhou Rong | officer | A | 39,432 | 0 | $0 |
| 2026-03-09 | Liawatidewi Yakob | director | A | 35,450 | 0 | $0 |
| 2026-03-09 | Zhang Jack Y. | director | A | 180,504 | 0 | $0 |
| 2026-03-09 | Zhang Jack Y. | director | A | 72,462 | 0 | $0 |
| 2026-03-09 | PETERS WILLIAM J | director | A | 58,693 | 0 | $0 |
| 2026-03-09 | Zhou Rong | officer | A | 39,432 | 0 | $0 |
| 2026-03-09 | Liawatidewi Yakob | director | A | 35,450 | 0 | $0 |
| 2026-03-09 | Zhang Jack Y.; Luo Mary Z. | director | A | 180,504 | 0 | $0 |
Federal contracts
No federal contract actions on record for this recipient mapping.
Lobbying
No federal lobbying filings on record for this client mapping.
Public attention
No Wikipedia pageview data linked to this company.