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 18, 2025
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
10
8 non-derivative · 2 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Mar 17, 2025Tax withholding(F)7K$27.69$200K1.2M
Mar 17, 2025Tax withholding(F)16K$27.69$447K2.6M
Mar 15, 2025Tax withholding(F)10K$26.66$260K2.7M
Mar 15, 2025Tax withholding(F)4K$26.66$110K1.2M
Mar 14, 2025Option exercise(M)290K$14.69$4.3M2.9M
Mar 14, 2025Tax withholding(F)226K$26.66$6.0M2.7M
Mar 14, 2025Option exercise(M)211K$14.69$3.1M1.4M
Mar 14, 2025Tax withholding(F)163K$26.66$4.3M1.2M

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Mar 14, 2025Option exercise(M)290K—$00
Mar 14, 2025Option exercise(M)211K—$00

Transaction Codes

F
Shares withheld for taxes
M
Option exercise / conversion

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001415889-25-008523) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML