Arkolith/Insider Trading/AMPX/Form 4

Stefan Constantin Ionel

Chief Technology OfficerAmprius Technologies, Inc. (AMPX) · full profile →Form 4 · filed Jan 23, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$6.8M
Net Open-Market Flow
-$6.8M
Transactions
17
10 non-derivative · 7 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Jan 23, 2026Option exercise(M)2K$0.05$80750K
Jan 23, 2026Sell(S)2K$12.00$19K749K
Jan 22, 2026Option exercise(M)254K$0.05$13K1.0M
Jan 22, 2026Sell(S)493K$12.04$5.9M749K
Jan 22, 2026Option exercise(M)166K$0.05$8K1.2M
Jan 22, 2026Option exercise(M)73K$0.45$33K1.1M
Jan 21, 2026Sell(S)73K$12.00$879K749K
Jan 21, 2026Option exercise(M)16K$0.05$792806K
Jan 21, 2026Option exercise(M)42K$0.62$26K790K
Jan 21, 2026Option exercise(M)16K$0.05$794822K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Jan 23, 2026Option exercise(M)2K—$040K
Jan 22, 2026Option exercise(M)254K—$041K
Jan 22, 2026Option exercise(M)73K—$00
Jan 22, 2026Option exercise(M)166K—$00
Jan 21, 2026Option exercise(M)16K—$0295K
Jan 21, 2026Option exercise(M)16K—$0166K
Jan 21, 2026Option exercise(M)42K—$090

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001940928-26-000002) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML