Director exercised or converted 4,179 AMPH derivative securities | OQRO Insider tradesWhy it stands out
Derivative exercise or conversion — not an open-market buy.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
All the details
Dates, kept separate
- Transaction date
- Nov 25, 2025
- Reporting period
- Not applicable
- Filed with the SEC
- Nov 26, 2025
DirectorOption exercise
Context
- Classification
option exercise
Code M — exercise or conversion of a derivative security
- Planned / mechanical clue
Footnote references vesting of compensation awards
Only flagged when a footnote says so; never inferred
Source receipt
- Record ID
- 0001047579-25-000006
Added to OQROOct 6, 2026, 9:54 PM UTC Data qualityVerified: identifiers matched exactly IssuerAmphastar Pharmaceuticals, Inc. Reporting personRichard K Prins SecurityStock Option (right to buy) TableDerivative (Table II) Transaction dateNov 25, 2025 Acquired / disposedDisposed (D) Footnotes from the filing
- Shares subject to the option are fully vested and immediately exercisable.
Around the same time
Derivative exercise or conversion — not an open-market buy.
Amphstar Pharmaceuticals's SENIOR EVP, PRODUCTION CENTER sold $256K of Amphstar Pharmaceuticals shares. Nobody planned it ahead of time.
Derivative exercise or conversion — not an open-market buy.