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4//SEC Filing

Wang David H 4

Accession 0001140361-25-036835

CIK 0001680062other

View on SEC.gov Company Profile

Filed

Sep 29, 8:00 PM ET

Accepted

Sep 30, 9:33 PM ET

Size

9.8 KB

Accession

0001140361-25-036835

Insider Transaction Report

Form 4

Period: 2025-09-08

ACM Research, Inc.ACMR

DirectorSee Remarks10% Owner

Transactions

Exercise/Conversion
Stock Option
2025-09-08−130,000→ 610,002 total
Exercise: $1.00Exp: 2026-12-27→ Class A Common Stock (130,000 underlying)
Exercise/Conversion
Class A Common Stock
2025-09-08$1.00/sh+130,000$130,000→ 802,708 total

Holdings

Class A Common Stock
(indirect: By Sophia Wang, daughter of David H. Wang)
45,837
Class A Common Stock
(indirect: By Trust)
620,001
Class A Common Stock
(indirect: By Spouse)
100,002
Class A Common Stock
(indirect: By Trust)
180,000

Footnotes (2)

[F1]On September 8, 2025, the reporting person exercised, by net exercise, a previously issued stock option to purchase 130,000 shares of Class A Common Stock of the Issuer.
[F2]The option is fully vested and exercisable.

Documents

1 file

4
form4.xmlPrimary
FORM 4

Issuer

ACM Research, Inc.

CIK 0001680062

Entity typeother

Related Parties

1

filerCIK 0001721580

Filing Metadata

Form type: 4
Filed: Sep 29, 8:00 PM ET
Accepted: Sep 30, 9:33 PM ET
Size: 9.8 KB

View on SEC.gov