Richard K. Prins
Director · Amphastar Pharmaceuticals, Inc.
IndividualSelling only
- 2024
- Aug 12, 2026
- 9
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Richard K. Prins 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
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Frequently asked questions
Who is Richard K. Prins?
Richard K. Prins is a corporate insider, tracked as Director of Amphastar Pharmaceuticals, Inc. (AMPH). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Richard K. Prins submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Richard K. Prins been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($957K) across all tracked filings.
