Amphastar Pharmaceuticals, Inc. (AMPH) Stock
6 of the hedge funds AlphaScala tracks reported AMPH in 13F filings for the quarter ended Jun 30, 2026; the largest reported position is Marshall Wace's at $21.52M. Company insiders reported 0 open-market buys and 5 sales on SEC Form 4 in the 90 days to Oct 21, 2026.
Which hedge funds own AMPH?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Marshall Wace | 1.07M | $21.52M | +4% |
| D.E. Shaw David Shaw | 887K | $17.90M | +33% |
| Renaissance Technologies Jim Simons (founder) | 525K | $10.60M | -5% |
| Point72 Steve Cohen | 55K | $1.11M | NEW |
| Millennium Management Israel Englander | 32K | $642.0K | -91% |
| Citadel Ken Griffin | 16K | $327.5K | -75% |
13F holdings as of Jun 30, 2026
Explore all tracked funds →Are Amphastar Pharmaceuticals, Inc. insiders buying or selling?
SEC Form 4 filings| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Sep 21, 26 | Peters William J | CFO, EVP & TREASURER | SELL | 4.1K | $103K |
| Sep 16, 26 | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | SELL | 10.0K | $239K |
| Sep 2, 26 | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | SELL | 3.2K | $75K |
| Aug 11, 26 | Prins Richard K | Director | SELL | 8.0K | $162K |
| Aug 7, 26 | Peters William J | CFO, EVP & TREASURER | SELL | 8.2K | $184K |
SEC Form 4 filings as of Oct 21, 2026
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Powered by TradingViewWhat does Amphastar Pharmaceuticals, Inc. do?
Amphastar Pharmaceuticals Inc. is a biopharmaceutical company specializing in the development, manufacturing, and marketing of generic and proprietary injectable, intranasal, and inhalation products. Its portfolio includes technically challenging medications such as BAQSIMI, the leading prescribed nasal spray glucagon for treating severe hypoglycemia; Primatene Mist, an over-the-counter epinephrine inhalation aerosol for mild asthma symptoms; enoxaparin for preventing deep vein thrombosis; naloxone and REXTOVY for opioid overdose reversal; glucagon emergency kits; and Cortrosyn for diagnosing adrenocortical insufficiency. Additional offerings encompass Amphadase hyaluronidase injections, epinephrine for allergic reactions, lidocaine formulations for anesthesia, phytonadione for newborns, morphine for pain management, and lorazepam for procedures. These products serve hospital, urgent care, emergency medical services, and retail pharmacy channels, distributed via group purchasing organizations and wholesalers. Operating from state-of-the-art cGMP-compliant facilities, primarily in the United States with presence in China and France, Amphastar Pharmaceuticals Inc. focuses on one reportable segment: pharmaceutical products, emphasizing complex generics, biologics, biosimilars, and innovative drug delivery systems. Founded in 1996 and headquartered in Rancho Cucamonga, California, it plays a vital role in addressing critical medical needs in the specialty pharmaceutical sector.