Arkolith/Insider Trading/ACMR/Form 4

Dun Haiping

DirectorACM Research, Inc. (ACMR) · full profile →Form 4 · filed Mar 11, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$217K
Net Open-Market Flow
-$217K
Transactions
4
3 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Mar 9, 2026Sell(S)900$43.94$40K0
Mar 9, 2026Sell(S)4K$43.37$178K900
Mar 9, 2026Option exercise(M)5K$5.60$28K5K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Mar 9, 2026Option exercise(M)5K—$055K

Transaction Codes

S
Open-market sale
M
Option exercise / conversion

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001140361-26-009039) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML