ACM Research, Inc. (ACMR) Insider Trading
Directors, officers and holders of more than 10% of ACMR report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 248 transactions on file: 0 with code P, 28 with code S and 22 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 9, 2026 | Wang David H | See Remarks | M Exercise | 70,000 | Not measured | Not measured |
| Sep 9, 2026 | Wang David H | See Remarks | S Sale | 33,493 | $73.80 | $2,471,783 |
| Sep 9, 2026 | Wang David H | See Remarks | S Sale | 4,807 | $76.73 | $368,841 |
| Sep 9, 2026 | Wang David H | See Remarks | S Sale | 11,666 | $75.58 | $881,716 |
| Sep 9, 2026 | Wang David H | See Remarks | S Sale | 1,100 | $77.59 | $85,349 |
| Sep 9, 2026 | Wang David H | See Remarks | S Sale | 18,934 | $74.67 | $1,413,802 |
| Sep 9, 2026 | Wang David H | See Remarks | M Exercise | 70,000 | $1.00 | $70,000 |
| Sep 8, 2026 | Wang David H | See Remarks | M Exercise | 70,000 | $1.00 | $70,000 |
| Sep 8, 2026 | Wang David H | See Remarks | S Sale | 51,374 | $77.15 | $3,963,504 |
| Sep 8, 2026 | Wang David H | See Remarks | S Sale | 1,500 | $78.57 | $117,855 |
| Sep 8, 2026 | Wang David H | See Remarks | S Sale | 4,803 | $75.99 | $364,980 |
| Sep 8, 2026 | Wang David H | See Remarks | M Exercise | 70,000 | Not measured | Not measured |
| Sep 8, 2026 | Wang David H | See Remarks | S Sale | 12,323 | $78.08 | $962,180 |
| Aug 20, 2026 | McKechnie Mark | See Remarks | M Exercise | 25,000 | $13.89 | $347,250 |
| Aug 20, 2026 | McKechnie Mark | See Remarks | M Exercise | 30,199 | Not measured | Not measured |
| Aug 20, 2026 | McKechnie Mark | See Remarks | S Sale | 30,365 | $77.45 | $2,351,769 |
| Aug 20, 2026 | McKechnie Mark | See Remarks | M Exercise | 25,000 | Not measured | Not measured |
| Aug 20, 2026 | McKechnie Mark | See Remarks | M Exercise | 30,199 | $19.49 | $588,579 |
| Aug 20, 2026 | McKechnie Mark | See Remarks | S Sale | 13,625 | $76.34 | $1,040,133 |
| Aug 20, 2026 | McKechnie Mark | See Remarks | S Sale | 11,209 | $77.89 | $873,069 |
| Aug 18, 2026 | Dun Haiping | Director | M Exercise | 5,000 | Not measured | Not measured |
| Aug 18, 2026 | Dun Haiping | Director | S Sale | 1,200 | $80.29 | $96,348 |
| Aug 18, 2026 | Dun Haiping | Director | S Sale | 3,400 | $81.31 | $276,454 |
| Aug 18, 2026 | Dun Haiping | Director | S Sale | 400 | $82.17 | $32,868 |
| Aug 18, 2026 | Dun Haiping | Director | M Exercise | 5,000 | $5.60 | $28,000 |
| Aug 12, 2026 | Pappis Charles C | Director | A Award | 728 | Not measured | Not measured |
| Aug 12, 2026 | Liu Tracy | Director | A Award | 728 | Not measured | Not measured |
| Aug 12, 2026 | Liu Tracy | Director | A Award | 6,400 | Not measured | Not measured |
| Aug 12, 2026 | Pappis Charles C | Director | A Award | 6,400 | Not measured | Not measured |
| Aug 12, 2026 | Dun Haiping | Director | A Award | 6,400 | Not measured | Not measured |
| Aug 12, 2026 | Dun Haiping | Director | A Award | 728 | Not measured | Not measured |
| Jun 5, 2026 | Cheav Sotheara | See remarks | S Sale | 968 | $82.61 | $79,966 |
| Jun 5, 2026 | Cheav Sotheara | See remarks | S Sale | 400 | $84.01 | $33,604 |
| Jun 5, 2026 | Cheav Sotheara | See remarks | M Exercise | 5,399 | $13.89 | $74,992 |
| Jun 5, 2026 | Cheav Sotheara | See remarks | S Sale | 1,647 | $85.41 | $140,670 |
| Jun 5, 2026 | Cheav Sotheara | See remarks | S Sale | 2,384 | $81.73 | $194,844 |
| Jun 5, 2026 | Cheav Sotheara | See remarks | M Exercise | 5,399 | Not measured | Not measured |
| Jun 4, 2026 | Cheav Sotheara | See remarks | M Exercise | 13,351 | $13.89 | $185,445 |
| Jun 4, 2026 | Cheav Sotheara | See remarks | S Sale | 1,300 | $84.08 | $109,304 |
| Jun 4, 2026 | Wang David H | See Remarks | S Sale | 2,060 | $83.86 | $172,752 |
| Jun 4, 2026 | Wang David H | See Remarks | S Sale | 8,581 | $87.13 | $747,663 |
| Jun 4, 2026 | Wang David H | See Remarks | S Sale | 17,543 | $85.11 | $1,493,085 |
| Jun 4, 2026 | Cheav Sotheara | See remarks | S Sale | 2,839 | $85.77 | $243,501 |
| Jun 4, 2026 | Wang David H | See Remarks | M Exercise | 40,002 | $1.00 | $40,002 |
| Jun 4, 2026 | Wang David H | See Remarks | S Sale | 826 | $87.91 | $72,614 |
| Jun 4, 2026 | Wang David H | See Remarks | S Sale | 10,992 | $86.07 | $946,081 |
| Jun 4, 2026 | Cheav Sotheara | See remarks | S Sale | 9,212 | $85.11 | $784,033 |
| Jun 4, 2026 | Cheav Sotheara | See remarks | M Exercise | 13,351 | Not measured | Not measured |
| Jun 4, 2026 | Wang David H | See Remarks | M Exercise | 40,002 | Not measured | Not measured |
| Jun 3, 2026 | Wang David H | See Remarks | S Sale | 9,925 | $90.78 | $900,992 |
The full Form 4 history is on the ACMR company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.