Arkolith/Insider Trading/ACMR/Form 4

Wang David H

See Remarks, Director, 10% OwnerACM Research, Inc. (ACMR) · full profile →Form 4 · filed Jun 5, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$8.8M
Net Open-Market Flow
-$8.8M
Transactions
15
13 non-derivative · 2 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Jun 4, 2026Option exercise(M)40K$1.00$40K843K
Jun 4, 2026Sell(S)2K$83.86$173K841K
Jun 4, 2026Sell(S)18K$85.11$1.5M823K
Jun 4, 2026Sell(S)11K$86.07$946K812K
Jun 4, 2026Sell(S)9K$87.13$748K804K
Jun 4, 2026Sell(S)826$87.91$73K803K
Jun 3, 2026Sell(S)1K$93.04$110K803K
Jun 3, 2026Option exercise(M)60K$1.00$60K863K
Jun 3, 2026Sell(S)4K$87.57$377K858K
Jun 3, 2026Sell(S)6K$88.98$560K852K
Jun 3, 2026Sell(S)32K$89.84$2.9M820K
Jun 3, 2026Sell(S)10K$90.78$901K810K
Jun 3, 2026Sell(S)6K$92.38$540K804K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Jun 4, 2026Option exercise(M)40K—$0270K
Jun 3, 2026Option exercise(M)60K—$0310K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001140361-26-024280) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML