Officer exercised or converted 9,787 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
- Dec 17, 2025
- Reporting period
- Not applicable
- Filed with the SEC
- Dec 18, 2025
OfficerOption 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
- 0001645326-25-000004
Added to OQROOct 6, 2026, 9:54 PM UTC Data qualityVerified: identifiers matched exactly IssuerAmphastar Pharmaceuticals, Inc. Reporting personRong Zhou Officer titleSENIOR EVP, PRODUCTION CENTER SecurityEmployee Stock Option (right to buy) TableDerivative (Table II) Transaction dateDec 17, 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.
A board member of Amphstar Pharmaceuticals sold $45K of Amphstar Pharmaceuticals shares. Nobody planned it ahead of time.