Machine signal
Active cluster sell — 3 distinct insiders, $763.9K, window ends Sep 21, 2026.
Figures computed from official regulatory filings — .
Analysttarget 22.5 USD (-13%) · consensus 2.86/5 · 0 buy · 6 hold · 1 sell
Ownershipinsiders 30.81% · institutions 68.32% · short 22.6% of float
In USD · as of Oct 19, 2026
Ask the machine
Search and compare insider transactions, companies and their statistics in plain language. Your question becomes a query over available data, not a conversation or investment advice.
Data for Amphastar Pharmaceuticals, Inc. only. No web search. Global per-insider statistics are excluded.
An executed search uses one credit, even with no results. Errors and unsupported questions use no credits.
Amphastar Pharmaceuticals, Inc., a bio-pharmaceutical company, develops, manufactures, markets, and sells generic and proprietary injectable, inhalation, and intranasal products in the United States, China, and France. It offers BAQSIMI, a dry nasal spray used in an emergency for the treatment of severe hypoglycemia; Primatene MIST, an epinephrine inhalation product for the temporary relief of mild symptoms of intermittent asthma; Glucagon for injection emergency kit; Enoxaparin, an injectable form of low molecular weight heparin for the prevention and treatment of deep vein thrombosis; and REXTOVY and Naloxone for opioid overdose. The company also provides Cortrosyn, a lyophilized power for use as a diagnostic agent in the screening of patients with adrenocortical insufficiency; Amphadase, a bovine-sourced hyaluronidase injection; Epinephrine injection for allergic reactions; Lidocaine jelly, an anesthetic product for urological procedures; Lidocaine topical solution for various procedures; Phytonadione injection, a vitamin K1 injection for newborn babies; and emergency syringe products, including atropine, calcium chloride, dextrose, epinephrine, lidocaine, and sodium bicarbonate. In addition, it offers Albuterol sulfate inhalation aerosol for the treatment or prevention of bronchospasm; Iron sucrose injection, an iron replacement product for the treatment of iron deficiency anemia in patients with chronic kidney disease; Teriparatide injection for managing daily osteoporosis therapy; and Ipratropium Bromide HFA inhalation aerosol, an anticholinergic indicated for the maintenance treatment of bronchospasm associated with chronic obstructive pulmonary disease. Further, the company provides active pharmaceutical ingredient (API) products, such as Recombinant Human Insulin and porcine insulin API. The company was founded in 1996 and is headquartered in Rancho Cucamonga, California.
Market information source · Oct 19, 2026
SEC company identity · Oct 19, 2026
Open-market timeline · full history
10 buys470 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details | |
|---|---|---|---|---|---|
| PETERS WILLIAM J | Sell | $103.5K | SEC |
| Zhou Rong | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Zhou Rong | Exercise | $133.5K | Unusual size | SEC |
| Zhou Rong | Sell | $239.4K | SEC |
| Zhou Rong | Sell | $75.3K | SEC |
| PRINS RICHARD K | Sell | $161.9K | SEC |
| PETERS WILLIAM J | Sell | $183.9K | SEC |
| PETERS WILLIAM J | Exercise | $100K | SEC |
| PETERS WILLIAM J | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Pierce Anthony T | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Pierce Anthony T | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Deflin Gayle | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| PRINS RICHARD K | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Gaugh David Russell | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Deflin Gayle | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Gerst Diane G. | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| ZASLOFF MICHAEL A | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Gerst Diane G. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| ZASLOFF MICHAEL A | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| PRINS RICHARD K | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Lee Howard | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Lee Howard | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| PRINS RICHARD K | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Lee Howard | Other | $14.2K | SEC |
| Gaugh David Russell | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |