Arkolith/Insider Trading/AMPH/Form 4

Zhang Jack Y.

CEO & CHIEF SCIENTIFIC OFFICER, Director, 10% OwnerAmphastar Pharmaceuticals, Inc. (AMPH) · full profile →Form 4 · filed Mar 11, 2026
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
6
4 non-derivative · 2 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Mar 10, 2026Tax withholding(F)4K$18.91$83K1.2M
Mar 10, 2026Tax withholding(F)15K$18.91$280K3.0M
Mar 9, 2026Grant(A)181K—$03.0M
Mar 9, 2026Grant(A)72K—$01.3M

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Mar 9, 2026Grant(A)372K—$0372K
Mar 9, 2026Grant(A)149K—$0149K

Transaction Codes

F
Shares withheld for taxes
A
Grant / award

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0000889740-26-000005) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML