ACM Research insider sells 140,000 shares
Director, officer, and ten percent owner David H. Wang exercised options and sold 140,000 ACMR shares over two days under a Rule 10b5-1 trading plan.
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Form Type
4
Rhea-AI Filing Summary
ACM Research, Inc. (ACMR) reported that director, officer, and ten percent owner David H. Wang exercised options to acquire a total of 140,000 shares of Class A Common Stock at an exercise price of $1.00 per share on September 8 and 9, 2026, and sold 140,000 shares of Class A Common Stock in multiple open-market transactions on those same dates under a Rule 10b5-1 trading plan adopted on June 5, 2026.
Insider Trade Summary 10b5-1
Exercise and Sale: 140,000 shares ($10.49M approx. pre-tax spread)
Exercise and Sale
16 txns
Insider
Wang David H
Role
See Remarks
Sold
140,000 shs ($10.63M)
Approx. gross sale proceeds
$10.63M
Approx. exercise cost
$140K
Approx. pre-tax spread
$10.49M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option F11 | 70,000 | $0.00 | $0.00 |
| Exercise | Class A Common Stock | 70,000 | $1.00 | $70K |
| Sale | Class A Common Stock F1, F6 | 33,493 | $73.80 | $2.47M |
| Sale | Class A Common Stock F1, F7 | 18,934 | $74.67 | $1.41M |
| Sale | Class A Common Stock F1, F8 | 11,666 | $75.58 | $882K |
| Sale | Class A Common Stock F1, F9 | 4,807 | $76.73 | $369K |
| Sale | Class A Common Stock F1, F10 | 1,100 | $77.59 | $85K |
| Exercise | Stock Option F11 | 70,000 | $0.00 | $0.00 |
| Exercise | Class A Common Stock | 70,000 | $1.00 | $70K |
| Sale | Class A Common Stock F1, F2 | 4,803 | $75.99 | $365K |
| Sale | Class A Common Stock F1, F3 | 51,374 | $77.15 | $3.96M |
| Sale | Class A Common Stock F1, F4 | 12,323 | $78.08 | $962K |
| Sale | Class A Common Stock F1, F5 | 1,500 | $78.57 | $118K |
| holding | Class A Common Stock | -- | -- | -- |
| holding | Class A Common Stock | -- | -- | -- |
| holding | Class A Common Stock | -- | -- | -- |
Holdings After Transaction:
Stock Option — 130,000 contracts (Direct);
Class A Common Stock — 802,708 shares (Direct);
Class A Common Stock — 100,002 shares (Indirect, By Jing Chen, wife of David H. Wang);
Class A Common Stock — 180,000 shares (Indirect, By David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children);
Class A Common Stock — 620,001 shares (Indirect, By Wang-Chen Family Living Trust)
Footnotes (11)
- F1. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026.
- F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.52 to $76.41, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2), (3), (4), (5), (6), (7), (8), (9), and (10) to this Form 4.
- F3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $76.52 to $77.5, inclusive.
- F4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $77.52 to $78.48, inclusive.
- F5. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $78.55 to $78.64, inclusive.
- F6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $73.26 to $74.21, inclusive.
- F7. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $74.26 to $75.22, inclusive.
- F8. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $75.28 to $75.95, inclusive.
- F9. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $76.38 to $77.35, inclusive.
- F10. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $77.59 to $77.59, inclusive.
- F11. The option is fully vested and exercisable.
Key Figures
Options exercised: 140,000 shares
Option exercise price: $1.00 per share
Shares sold: 140,000 shares
+5 more
8 metrics
Options exercised
140,000 shares
Total options exercised into Class A Common Stock on September 8–9, 2026
Option exercise price
$1.00 per share
Exercise price for 140,000 shares of Class A Common Stock
Shares sold
140,000 shares
Total Class A Common Stock sold in open-market transactions on September 8–9, 2026
Illustrative sale price range (example footnote)
$75.52–$76.41 per share
One group of sales on September 8, 2026 executed at multiple prices within this range
Indirect holding by spouse
100,002 shares
Class A Common Stock held by Jing Chen, wife of David H. Wang, reported as indirect ownership
Indirect holding by irrevocable trust
180,000 shares
Class A Common Stock held by the family irrevocable trust for the Wang children
Indirect holding by living trust
620,001 shares
Class A Common Stock held by the Wang-Chen Family Living Trust
Option expiration date
December 27, 2026
Expiration date of the fully vested options exercised for 140,000 shares
Key Terms
Rule 10b5-1 trading plan, weighted average price, Class A Common Stock, fully vested and exercisable
4 terms
Rule 10b5-1 trading plan regulatory
"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Class A Common Stock financial
"The option is exercisable into shares of Class A Common Stock."
Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.
fully vested and exercisable financial
"The option is fully vested and exercisable."
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did ACMR insider David H. Wang do in this Form 4 filing?
David H. Wang exercised options for 140,000 shares of ACM Research Class A Common Stock at $1.00 per share and sold 140,000 shares in open-market transactions on September 8 and 9, 2026, pursuant to a Rule 10b5-1 trading plan.
Over what dates did the ACMR insider transactions occur?
The reported transactions for ACM Research occurred on September 8, 2026 and September 9, 2026, including option exercises and related open-market sales of Class A Common Stock.
How many ACMR options did David H. Wang exercise, and at what price?
David H. Wang exercised options covering 140,000 shares of ACM Research Class A Common Stock in total, at an exercise price of $1.00 per share, from options that were fully vested and exercisable and scheduled to expire on December 27, 2026.
Were the ACMR insider sales made under a Rule 10b5-1 trading plan?
Yes. A footnote states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by David H. Wang on June 5, 2026, indicating the sales followed a pre-arranged trading plan.
AI-generated analysis. How Rhea-AI works. Not financial advice.
