-
Signature
-
/s/ Mark McKechnie, Attorney-in-Fact for Charles Pappis
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Issuer symbol
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ACMR
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Transactions as of
-
05 Mar 2026
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Net transactions value
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-$250,450
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Form type
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4
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Filing time
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09 Mar 2026, 16:30:32 UTC
Reporting Owners (1)
| Name |
Relationship |
Address |
Signature |
Signature date |
CIK |
| Pappis Charles C |
Director |
C/O ACM RESEARCH, INC., 42307 OSGOOD ROAD, SUITE I, FREMONT |
/s/ Mark McKechnie, Attorney-in-Fact for Charles Pappis |
09 Mar 2026 |
0001475345 |
Transactions Table
| Type |
Sym |
Class |
Transaction |
Value $ |
Shares |
Change % |
* Price $ |
Shares After |
Date |
Ownership |
Footnotes |
| transaction |
ACMR |
Class A Common Stock |
Options Exercise |
|
+5,000 |
|
$29.18* |
5,000 |
05 Mar 2026 |
Direct |
F1 |
| transaction |
ACMR |
Class A Common Stock |
Sale |
$250,450 |
-5,000 |
-100% |
$50.09 |
0 |
05 Mar 2026 |
Direct |
F2 |
Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)
| Type |
Sym |
Class |
Transaction |
Value $ |
Shares |
Change % |
* Price $ |
Shares After |
Date |
Underlying Class |
Amount |
Exercise Price |
Ownership |
Footnotes |
| transaction |
ACMR |
Stock Option |
Options Exercise |
|
-5,000 |
-50% |
$0.000000* |
5,000 |
05 Mar 2026 |
Class A Common Stock |
5,000 |
$29.18 |
Direct |
F1, F3 |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.
Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.
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).
Explanation of Responses: