Amphastar Pharmaceuticals, Inc. (AMPH) Stock

HealthcareDrug Manufacturers - Specialty & Generic Website

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
FundShares HeldPosition ValueChange vs prior Q
Marshall Wace1.07M$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$1.11MNEW
Millennium Management
Israel Englander
32K$642.0K-91%
Citadel
Ken Griffin
16K$327.5K-75%

13F holdings as of Jun 30, 2026

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Are Amphastar Pharmaceuticals, Inc. insiders buying or selling?

SEC Form 4 filings
90 days to Oct 21, 2026
Buys
0
Sells
5
Net $
-$764K
Unique insiders
3
DateInsiderRoleTypeSharesValue
Sep 21, 26Peters William JCFO, EVP & TREASURERSELL4.1K$103K
Sep 16, 26Zhou RongSENIOR EVP, PRODUCTION CENTERSELL10.0K$239K
Sep 2, 26Zhou RongSENIOR EVP, PRODUCTION CENTERSELL3.2K$75K
Aug 11, 26Prins Richard KDirectorSELL8.0K$162K
Aug 7, 26Peters William JCFO, EVP & TREASURERSELL8.2K$184K

SEC Form 4 filings as of Oct 21, 2026

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What 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.

CEO
Dr. Yongfeng Zhang Ph.D.
Employees
2,028
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