Zhang Jack Y.

Zhang Jack Y. is listed in filings as CEO & CHIEF SCIENTIFIC OFFICER at Amphastar Pharmaceuticals, Inc.. This profile follows SEC Form 4 activity through Mar 17, 2026, including 30 public disclosures. Recent filings connect the profile to Amphastar Pharmaceuticals, Inc. (AMPH). The current snapshot covers public activity from Jun 11, 2024 to Mar 17, 2026. Reported amounts are shown as $177.9K to $279.6K. The page organizes purchases, sales, issuer links, reported share activity, and filing evidence for review as public disclosure data.