AMPHASTAR PHARMACEUTICALS IN (AMPH) Institutional Ownership and Insiders Activity

AMPHASTAR PHARMACEUTICALS IN (AMPH) is widely held by institutional investors, with 204 firms reporting positions valued at approximately $569.74M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Blackrock, Inc. is the largest disclosed holder, reporting approximately $105.44M in AMPH holdings in its latest filing.

Recent insider activity includes 6 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.