Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Anthony T. Pierce files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Floyd F. Petersen - $454K in AMPH purchases and sales in the last 12 months
- Rong Zhou - $315K in AMPH purchases and sales in the last 12 months
- William J. Peters - $287K in AMPH purchases and sales in the last 12 months
- Richard K. Prins - $275K in AMPH purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Anthony T. Pierce?
Anthony T. Pierce is a corporate insider of Amphastar Pharmaceuticals, Inc. (AMPH). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Anthony T. Pierce last file a Form 4?
The only primary Form 4 on record is dated 13 July 2026.
