Jian Wang - 18 Sep 2025 Form 4 Insider Report for ACM Research, Inc. (ACMR)

Reporting relationship: Chief Executive Officer and President of ACM Research (Shanghai), Inc., a subsidiary of the Issuer
Issuer ticker: ACMR
Reported as of: 18 Sep 2025
Net transaction value: -$882,000
SEC form: 4
Accepted by SEC: 19 Sep 2025, 16:30:13 UTC
Prior SEC filing: 26 Aug 2025
Source filing: View source filing
Reporting owner signature: /s/ Mark McKechnie, Attorney-in-Fact for Jian Wang

Key filing fact

Jian Wang filed Form 4 for ACM Research, Inc. (ACMR) on 19 Sep 2025.

Key facts

This page summarizes Jian Wang's Form 4 filing for ACM Research, Inc. (ACMR).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 19 Sep 2025, 16:30.

Change

Previous filing in this sequence was filed on 26 Aug 2025.
Current net transaction value: -$882,000.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001721620 Primary reporting owner

Wang Jian

Relationship: Chief Executive Officer and President of ACM Research (Shanghai), Inc., a subsidiary of the Issuer
Address: C/O ACM RESEARCH, INC., 42307 OSGOOD ROAD, SUITE I, FREMONT
Signature: /s/ Mark McKechnie, Attorney-in-Fact for Jian Wang
Signature date: 19 Sep 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ACMR transaction

Class A Common Stock

Options Exercise

Transaction value: $168,000
Shares: +30,000
Change %: +12%
Price: $5.60
Shares after: 283,158
Date: 18 Sep 2025
Ownership: Direct
Footnotes: F1

ACMR transaction

Class A Common Stock

Sale

Transaction value: $1,050,000
Shares: -30,000
Change %: -11%
Price: $35.00
Shares after: 253,158
Date: 18 Sep 2025
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ACMR transaction Derivative

Stock Option

Options Exercise

Transaction value: $0
Shares: -30,000
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 18 Sep 2025
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 30,000
Exercise price: $5.60
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

On September 18, 2025, the reporting person exercised a previously issued stock option to purchase 30,000 shares of Class A Common Stock of the Issuer.

Footnote F2

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 20, 2025.

Footnote F3

The option is fully vested and exercisable.

SEC remarks

Chief Executive Officer and President of ACM Research (Shanghai), Inc., a subsidiary of the Issuer