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ACM Research (NASDAQ: ACMR) details 6,208-share RSU grant to family trust

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Wang David H reported acquisition or exercise transactions in this Form 4 filing.

ACM Research, Inc. reported an insider equity award connected to director and officer David H. Wang. A trust for his daughter, Sophia Wang, received a grant of 6,208 restricted stock units tied to Class A common stock. Each restricted stock unit represents a contingent right to receive one share of ACMR common stock, with the grant value based on a 30-day lookback average fair market value of $51.54 per share. These units vest in four equal annual installments beginning on May 13, 2027. The filing also lists indirect holdings of Class A common stock by several family-related trusts and by Wang’s spouse and daughter.

Positive

  • None.

Negative

  • None.
Insider Wang David H
Role See Remarks
Type Security Shares Price Value
Grant/Award Restricted Stock Units 6,208 $0.00 --
holding Class A Common Stock -- -- --
holding Class A Common Stock -- -- --
holding Class A Common Stock -- -- --
holding Class A Common Stock -- -- --
Holdings After Transaction: Restricted Stock Units — 6,208 shares (Indirect, By Sophia Wang, daughter of David H. Wang); Class A Common Stock — 100,002 shares (Indirect, By Jing Chen, wife of David H. Wang)
Footnotes (1)
  1. Each restricted stock unit represents a contingent right to receive one share of ACMR common stock. The number of RSUs granted will be determined by dividing the applicable annual grant value by the 30-day lookback average fair market value of the Issuer's common stock, determined to be $51.54 per share. The restricted stock units vest in four equal annual installments beginning May 13, 2027.
RSU grant size 6,208 units Restricted stock units granted to Sophia Wang
Underlying shares 6,208 shares Each RSU represents one share of Class A common stock
Lookback fair market value $51.54 per share 30-day lookback average used to size annual grant
Vesting start date May 13, 2027 First of four equal annual vesting installments
Family Living Trust holdings 620,001 shares Class A common stock held by Wang-Chen Family Living Trust
Children’s Irrevocable Trust holdings 180,000 shares Class A common stock held by family irrevocable trust for children
Sophia Wang holdings 45,837 shares Indirect Class A common stock holdings by Sophia Wang
Jing Chen holdings 100,002 shares Indirect Class A common stock holdings by Jing Chen
restricted stock unit financial
"Each restricted stock unit represents a contingent right to receive one share of ACMR common stock."
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
RSUs financial
"The number of RSUs granted will be determined by dividing the applicable annual grant value by the 30-day lookback average fair market value..."
RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.
30-day lookback average fair market value financial
"The number of RSUs granted will be determined by dividing the applicable annual grant value by the 30-day lookback average fair market value of the Issuer's common stock..."
annual grant value financial
"The number of RSUs granted will be determined by dividing the applicable annual grant value by the 30-day lookback average fair market value..."
vest in four equal annual installments financial
"The restricted stock units vest in four equal annual installments beginning May 13, 2027."
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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Wang David H

(Last)(First)(Middle)
C/O ACM RESEARCH, INC.
42307 OSGOOD ROAD, SUITE I

(Street)
FREMONT CALIFORNIA 94539

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
ACM Research, Inc. [ ACMR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirectorX10% Owner
XOfficer (give title below)Other (specify below)
See Remarks
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class A Common Stock100,002IBy Jing Chen, wife of David H. Wang
Class A Common Stock45,837IBy Sophia Wang, daughter of David H. Wang
Class A Common Stock180,000IBy David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children
Class A Common Stock620,001IBy Wang-Chen Family Living Trust
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)05/13/2026A6,208(2) (3) (3)Class A Common Stock6,208$06,208IBy Sophia Wang, daughter of David H. Wang
Explanation of Responses:
1. Each restricted stock unit represents a contingent right to receive one share of ACMR common stock.
2. The number of RSUs granted will be determined by dividing the applicable annual grant value by the 30-day lookback average fair market value of the Issuer's common stock, determined to be $51.54 per share.
3. The restricted stock units vest in four equal annual installments beginning May 13, 2027.
Remarks:
Chief Executive Officer, President and Director
/s/ Mark McKechnie, Attorney-in-Fact for David H. Wang07/06/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did ACM Research (ACMR) report for David H. Wang?

ACM Research reported an indirect equity award linked to David H. Wang. A trust for his daughter, Sophia Wang, received 6,208 restricted stock units tied to Class A common stock, representing a contingent right to receive the same number of ACMR shares over time.

How many restricted stock units were granted in the latest ACMR Form 4?

The filing shows a grant of 6,208 restricted stock units. Each unit corresponds to one share of ACM Research Class A common stock, with vesting over four annual installments starting May 13, 2027, providing long-term equity exposure rather than an immediate cash transaction.

Who received the ACMR restricted stock units reported in this Form 4?

The restricted stock units are held indirectly by Sophia Wang, daughter of David H. Wang. They are reported as owned by her, with David H. Wang as the reporting person, reflecting family-related indirect ownership rather than a direct personal purchase or sale by him.

What is the fair market value reference for ACMR’s RSU grant?

The number of RSUs granted is based on an annual grant value divided by the 30-day lookback average fair market value of ACM Research’s common stock, determined to be $51.54 per share, aligning the equity award size with recent trading levels disclosed in the filing.

When do the ACMR restricted stock units reported for Sophia Wang vest?

The restricted stock units vest in four equal annual installments beginning May 13, 2027. This schedule spreads delivery of ACM Research Class A shares over four years, encouraging longer-term alignment with the company’s performance rather than immediate ownership or rapid turnover.

What indirect ACMR shareholdings were disclosed for David H. Wang’s family?

The filing lists indirect Class A common stock holdings, including 620,001 shares held by the Wang-Chen Family Living Trust, 180,000 shares in a family irrevocable trust for the children, 45,837 shares held by daughter Sophia Wang, and 100,002 shares held by Jing Chen, Wang’s spouse.