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ACM Research, Inc.

ACMR Net selling
CIK 0001680062 #1301 in the set updated 17 Sep 2026
Bought (120 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$244.77M
$79.83M on a plan · $86.31M straight out of an exercise
Sold at will
$78.64M
45 of 253 sales
Net
−$244.77M
−$78.64M against sales at will

By person

14 insiders · 300 transactions
502×

David H. Wang holds 502 times base salary in stock. $134.70M of shares against $267.80K in salary for 2025.

Salary from the company's own proxy. The shares are what David H. Wang last reported holding, valued at $77.59, the price Class A Common Stock was last bought or sold at on the open market here, on 9 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Wang David H
See Remarks
$79.97M (65) scheduled
−$79.97M
1,736,045
$134.70M
+25.1%
Xiang Yinan
Director
$43.39M (19)
−$43.39M
1,146,170
$88.93M
−31.2%
Shanghai Science & Technology Venture Capital (Group) Co., Ltd. entity
10% owner
$24.21M (8) scheduled
−$24.21M
2,338,510
$181.44M
−32.0%
Xing Xiao
Director
$24.21M (8) scheduled
−$24.21M
2,338,510
$181.44M
−32.0%
McKechnie Mark
See Remarks
$16.14M (43) scheduled
−$16.14M
900
$69.83K
+50.0%
Cheav Sotheara
See remarks
$10.24M (27) scheduled
−$10.24M
100,002
$7.76M
−7.2%
Dun Haiping
Director
$9.67M (33) scheduled
−$9.67M
0
$0.00
−100.0%
Chen Fuping
See remarks
$9.16M (5) scheduled
−$9.16M
0
$0.00
−100.0%
Hu Chenming
Director
$8.59M (5) scheduled
−$8.59M
100,002
$7.76M
−49.4%
Wang Jian
See remarks
$8.15M (9) scheduled
−$8.15M
253,158
$19.64M
0.0%
Feng Lisa
See remarks
$5.29M (16) scheduled
−$5.29M
50,001
$3.88M
+24.1%
Liu Tracy
Director
$5.24M (13) scheduled
−$5.24M
110,772
$8.59M
+45.3%
Pappis Charles C
Director
$510.45K (2) scheduled
−$510.45K
0
$0.00
Chen Fufa
See Remarks
129,583
$10.05M
+76.7%

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Insider
Date
Role
Action
Shares
Price
Amount
Wang David H
8 Sep 2025
See Remarks
Exercised, kept
130,000
$1.00
$130.00K
Wang David H
3 Mar 2025
See Remarks
Exercised, kept
210,000
$0.50
$105.00K
Dun Haiping
3 Mar 2025
Director
Exercised, kept
25,001
$0.50
$12.50K
Wang David H
14 Nov 2024
See Remarks
Exercised, kept
270,000
$0.50
$135.00K
Dun Haiping
14 Nov 2024
Director
Exercised, kept
35,000
$0.50
$17.50K
Dun Haiping
14 Aug 2024
Director
Exercised, kept
35,000
$0.50
$17.50K
Dun Haiping
14 May 2024
Director
Exercised, kept
35,000
$0.50
$17.50K
Wang David H
14 May 2024
See Remarks
Exercised, kept
180,000
$0.50
$90.00K
Dun Haiping
1 Mar 2024
Director
Exercised, kept
35,000
$0.50
$17.50K
Wang David H
1 Mar 2024
See Remarks
Exercised, kept
180,000
$0.50
$90.00K
Dun Haiping
14 Nov 2023
Director
Exercised, kept
35,000
$0.50
$17.50K
Wang David H
14 Nov 2023
See Remarks
Exercised, kept
180,000
$0.50
$90.00K
Wang David H
4 Sep 2023
See Remarks
Exercised, kept
180,000
$0.50
$90.00K
Dun Haiping
22 May 2023
Director
Exercised, kept
37,500
$0.50
$18.75K
Dun Haiping
9 Mar 2023
Director
Exercised, kept
37,500
$0.50
$18.75K
Dun Haiping
22 Nov 2022
Director
Exercised, kept
37,500
$0.50
$18.75K
Dun Haiping
14 Nov 2022
Director
Exercised, kept
37,500
$0.50
$18.75K
Dun Haiping
8 Aug 2022
Director
Exercised, kept
37,500
$0.50
$18.75K
Dun Haiping
18 May 2022
Director
Exercised, kept
37,500
$0.50
$18.75K
McKechnie Mark
9 Mar 2022
See Remarks
Exercised, kept
300
$13.85
$4.16K
Dun Haiping
2 Mar 2022
Director
Exercised, kept
12,500
$1.50
$18.75K
Feng Lisa
3 Nov 2021
See remarks
Exercised, kept
2,437
$5.60
$13.65K
Hu Chenming
4 May 2021
Director
Exercised, kept
23,334
$3.00
$70.00K
Cheav Sotheara
5 Apr 2021
See remarks
Exercised, kept
13,334
$1.50
$20.00K
Hu Chenming
30 Mar 2021
Director
Exercised, kept
10,000
$3.00
$30.00K
Wang David H
12 Mar 2021
See remarks
Exercised, kept
100,001
$0.75
$75.00K
Hu Chenming
8 Mar 2021
Director
Exercised, kept
12,334
$7.50
$92.51K
Showing 250 of 300 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 219
Amendments (4/A) skipped 16
Filings about a different issuer 0
Unreadable filings 0
Joint filings 2
Sales on a Rule 10b5-1 plan 57
Sales straight out of an exercise 151
Sales at will 45
Transactions with no price 0
Shares from compensation/vesting 6,671,043
Sales filed before the plan box existed 42
History held since 17 May 2018