STOCK TITAN

ACM Research (ACMR) grants options and RSUs to director

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Form Type
4

Rhea-AI Filing Summary

ACM Research, Inc. (ACMR) reported that director Charles C. Pappis received equity awards on August 12, 2026. He was granted 6,400 stock options with an exercise price of $81.26 per share, expiring on August 11, 2036; these options vest and become exercisable immediately prior to the 2027 annual meeting of stockholders, subject to continued service. He also received 728 restricted stock units, with a reference price of $96.13 per unit based on the average closing price over the 30 trading days before the grant; these RSUs are scheduled to vest immediately prior to the 2027 annual meeting of stockholders, subject to continued service.

Positive

  • None.

Negative

  • None.
Insider Pappis Charles C
Role Director
Type Security Shares Price Value
Grant/Award Stock Option F1 6,400 $0.00 $0.00
Grant/Award Restricted Stock Units F2, F3 728 $0.00 $0.00
Holdings After Transaction: Stock Option — 6,400 shares (Direct); Restricted Stock Units — 728 shares (Direct)
Footnotes (3)
  1. F1. The option will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.
  2. F2. The price per restricted stock unit is based on the average closing market price of the Issuer's common stock for the 30 trading days preceding the grant day.
  3. F3. The restricted stock units should be vested immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service.
Stock options granted 6,400 options Grant to Charles C. Pappis on August 12, 2026
Option exercise price $81.26 per share Exercise price for 6,400 stock options granted August 12, 2026
Option expiration date August 11, 2036 Expiration for 6,400 stock options held after grant
Restricted stock units granted 728 RSUs Grant to Charles C. Pappis on August 12, 2026
RSU reference price $96.13 per unit Based on average closing market price for 30 trading days before grant
Total stock options after transaction 6,400 options Direct holdings of options following the grant
Total RSUs after transaction 728 RSUs Direct holdings of RSUs following the grant
Stock Option financial
"security_title: "Stock Option" with an exercise price of 81.2600"
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
Restricted Stock Units financial
"security_title: "Restricted Stock Units" with 728.0000 underlying shares"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
exercise price financial
"conversion_or_exercise_price: "81.2600" for the stock option grant"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
annual meeting of stockholders regulatory
"will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders"
average closing market price financial
"price per restricted stock unit is based on the average closing market price"

FAQ

What equity awards did ACMR director Charles C. Pappis receive on August 12, 2026?

He received 6,400 stock options with an exercise price of $81.26 per share and 728 restricted stock units. Both awards are subject to service-based vesting linked to the 2027 annual meeting of stockholders.

What is the exercise price and expiration date of the new ACMR stock options?

The stock options granted to Charles C. Pappis have an exercise price of $81.26 per share and an expiration date of August 11, 2036, providing a 10-year term from the grant date.

When do the new ACMR stock options granted to Charles C. Pappis vest?

The 6,400 stock options will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders, subject to his continued service through that vesting date.

How many ACMR restricted stock units were granted to Charles C. Pappis and how are they priced?

He was granted 728 restricted stock units. The price per unit is based on the average closing market price of ACM Research’s common stock for the 30 trading days preceding the grant date, which is stated as $96.13.

What is the vesting schedule for the ACMR restricted stock units granted to Charles C. Pappis?

The 728 restricted stock units are scheduled to vest immediately prior to the 2027 annual meeting of stockholders, subject to his continued service with ACM Research through that vesting date.

Are the ACMR equity awards to Charles C. Pappis direct holdings?

Yes. The filing reports both the stock options and the restricted stock units as direct holdings of Charles C. Pappis following the transactions.

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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*
Pappis Charles C

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/12/2026
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
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
Stock Option$81.2608/12/2026A6,400 (1)08/11/2036Class A Common Stock6,400$06,400D
Restricted Stock Units$96.13(2)08/12/2026A728 (3) (3)Class A Common Stock728$0728D
Explanation of Responses:
1. The option will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.
2. The price per restricted stock unit is based on the average closing market price of the Issuer's common stock for the 30 trading days preceding the grant day.
3. The restricted stock units should be vested immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service.
/s/ Mark McKechnie, Attorney-in-Fact for Charles08/26/2026
** 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)