Arkolith/Insider Trading/AMPX/Form 4

Stefan Constantin Ionel

Chief Technology OfficerAmprius Technologies, Inc. (AMPX) · full profile →Form 4 · filed Dec 15, 2025
Net Selling
Open-Market Buys
$0
Open-Market Sells
$2.1M
Net Open-Market Flow
-$2.1M
Transactions
3
2 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Dec 11, 2025Option exercise(M)125K$0.05$6K947K
Dec 11, 2025Sell(S)198K$10.51$2.1M749K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Dec 11, 2025Option exercise(M)125K—$0311K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001940928-25-000020) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML