Arkolith/Insider Trading/AMPH/Form 4

Zhou Rong

SENIOR EVP, PRODUCTION CENTERAmphastar Pharmaceuticals, Inc. (AMPH) · full profile →Form 4 · filed Dec 18, 2025
Net Selling
Open-Market Buys
$0
Open-Market Sells
$256K
Net Open-Market Flow
-$256K
Transactions
3
2 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Dec 17, 2025Option exercise(M)10K$11.33$111K148K
Dec 17, 2025Sell(S)10K$26.20$256K138K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Dec 17, 2025Option exercise(M)10K—$00

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001645326-25-000004) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML