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 17, 2026
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
2
2 non-derivative · 0 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Mar 15, 2026Tax withholding(F)10K$18.18$178K3.0M
Mar 15, 2026Tax withholding(F)3K$18.18$53K1.2M

Transaction Codes

F
Shares withheld for taxes

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0000889740-26-000007) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML