2,432 AMPH shares were withheld to cover taxes or exercise cost (CEO) | OQRO Insider tradesWhy it stands out
Routine share withholding; mechanical by default.
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
- Mar 4, 2026
- Reporting period
- Not applicable
- Filed with the SEC
- Mar 7, 2026
CEOIndirect holdingTax withholding
Context
- Classification
tax withholding
Code F — shares delivered to pay exercise price or tax liability
- Planned / mechanical clue
Tax mechanics (code F)
Only flagged when a footnote says so; never inferred
0001104659-26-024842
Filed / recordedMar 7, 2026, 2:58 AM UTC Added to OQROOct 6, 2026, 9:54 PM UTC Data qualityVerified: identifiers matched exactly IssuerAmphastar Pharmaceuticals, Inc. Reporting personJack Y. Zhang RelationshipDirector, Officer, 10% owner Officer titleCEO & CHIEF SCIENTIFIC OFFICER TableNon-derivative (Table I) Transaction dateMar 4, 2026 Acquired / disposedDisposed (D) Shares owned after1,183,043 Ownership formIndirect — See footnote Footnotes from the filing
- The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs.
- The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.
Around the same time
Traded Mar 15 · filed 3 days later
Routine share withholding; mechanical by default.
Traded Mar 15 · filed 2 days later
Routine share withholding; mechanical by default.
Traded Mar 15 · filed 2 days later
Routine share withholding; mechanical by default.