InsiderClue
← All stocks

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.

Individual transactions

57
Insider
Date
Role
Action
Shares
Price
Amount
Hu Chenming
17 Mar 2025
Director
Sold on a plan
163,308
$30.00
$4.90M
Dun Haiping
14 Mar 2025
Director
Sold on a plan
7,062
$29.23
$206.42K
Dun Haiping
14 Mar 2025
Director
Sold on a plan
2,456
$28.32
$69.55K
Wang David H
13 Mar 2025
See Remarks
Sold on a plan
1,019
$27.65
$28.18K
Wang David H
13 Mar 2025
See Remarks
Sold on a plan
36,481
$27.29
$995.57K
Wang David H
12 Mar 2025
See Remarks
Sold on a plan
37,500
$27.42
$1.03M
Wang David H
11 Mar 2025
See Remarks
Sold on a plan
56,250
$26.57
$1.49M
Dun Haiping
10 Mar 2025
Director
Sold on a plan
15,001
$26.54
$398.13K
Wang David H
29 Nov 2024
See Remarks
Sold on a plan
56,250
$17.44
$981.00K
Dun Haiping
29 Nov 2024
Director
Sold on a plan
19,058
$17.43
$332.18K
Wang David H
26 Nov 2024
See Remarks
Sold on a plan
9,484
$18.31
$173.65K
Wang David H
26 Nov 2024
See Remarks
Sold on a plan
46,766
$17.80
$832.43K
Wang David H
22 Nov 2024
See Remarks
Sold on a plan
56,250
$19.08
$1.07M
Dun Haiping
22 Nov 2024
Director
Sold on a plan
15,000
$19.12
$286.80K
Xing Xiao
8 Oct 2024
Director
Sold on a plan indirect
90,396
$21.13
$1.91M
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
8 Oct 2024
10% owner
Sold on a plan
90,396
$21.13
$1.91M
Xing Xiao
7 Oct 2024
Director
Sold on a plan indirect
977
$26.01
$25.41K
Xing Xiao
7 Oct 2024
Director
Sold on a plan indirect
101,018
$25.35
$2.56M
Xing Xiao
7 Oct 2024
Director
Sold on a plan indirect
173,005
$23.32
$4.03M
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
7 Oct 2024
10% owner
Sold on a plan
173,005
$23.32
$4.03M
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
7 Oct 2024
10% owner
Sold on a plan
1,481
$25.02
$37.05K
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
7 Oct 2024
10% owner
Sold on a plan
100,514
$25.36
$2.55M
Xing Xiao
4 Oct 2024
Director
Sold on a plan indirect
119,127
$21.79
$2.60M
Xing Xiao
4 Oct 2024
Director
Sold on a plan indirect
580,873
$21.33
$12.39M
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
4 Oct 2024
10% owner
Sold on a plan
129,265
$20.94
$2.71M
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
4 Oct 2024
10% owner
Sold on a plan
570,735
$21.52
$12.28M
Xing Xiao
2 Oct 2024
Director
Sold on a plan indirect
26,300
$20.01
$526.26K
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
2 Oct 2024
10% owner
Sold on a plan
26,300
$20.01
$526.26K
Xing Xiao
1 Oct 2024
Director
Sold on a plan indirect
8,304
$20.19
$167.66K
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.
1 Oct 2024
10% owner
Sold on a plan
8,304
$20.19
$167.66K
Dun Haiping
29 Aug 2024
Director
Sold on a plan
19,097
$18.08
$345.27K
Dun Haiping
22 Aug 2024
Director
Sold on a plan
15,000
$19.85
$297.75K
Wang David H
29 May 2024
See Remarks
Sold on a plan
41,090
$22.62
$929.46K
Wang David H
29 May 2024
See Remarks
Sold on a plan
45,000
$22.62
$1.02M
Dun Haiping
29 May 2024
Director
Sold on a plan
19,239
$22.63
$435.38K
Dun Haiping
22 May 2024
Director
Sold on a plan
15,000
$22.88
$343.20K
Wang David H
22 May 2024
See Remarks
Sold on a plan
45,000
$22.81
$1.03M
Wang David H
22 May 2024
See Remarks
Sold on a plan
45,000
$22.81
$1.03M
Cheav Sotheara
14 Mar 2024
See remarks
Sold on a plan
2,383
$28.32
$67.49K
Cheav Sotheara
14 Mar 2024
See remarks
Sold on a plan
2,617
$27.49
$71.94K
Dun Haiping
14 Mar 2024
Director
Sold on a plan
3,557
$28.34
$100.81K
Dun Haiping
14 Mar 2024
Director
Sold on a plan
15,877
$27.56
$437.57K
Wang David H
14 Mar 2024
See Remarks
Sold on a plan
10,611
$28.38
$301.14K
Wang David H
14 Mar 2024
See Remarks
Sold on a plan
76,478
$27.51
$2.10M
Cheav Sotheara
13 Mar 2024
See remarks
Sold on a plan
5,000
$29.09
$145.45K
Wang David H
8 Mar 2024
See Remarks
Sold on a plan
45,000
$30.35
$1.37M
Wang David H
8 Mar 2024
See Remarks
Sold on a plan
45,000
$30.36
$1.37M
Dun Haiping
8 Mar 2024
Director
Sold on a plan
15,000
$30.36
$455.40K
Wang David H
29 Nov 2023
See Remarks
Sold on a plan
39,776
$17.13
$681.36K
Wang David H
29 Nov 2023
See Remarks
Sold on a plan
45,000
$17.14
$771.30K
Dun Haiping
29 Nov 2023
Director
Sold on a plan
18,984
$17.25
$327.47K
Dun Haiping
22 Nov 2023
Director
Sold on a plan
15,000
$17.66
$264.90K
Wang David H
22 Nov 2023
See Remarks
Sold on a plan
45,000
$17.68
$795.60K
Wang David H
22 Nov 2023
See Remarks
Sold on a plan
45,000
$17.67
$795.15K
Wang David H
13 Sep 2023
See Remarks
Sold on a plan
85,116
$17.68
$1.50M
Wang David H
12 Sep 2023
See Remarks
Sold on a plan
3,573
$18.72
$66.89K
Wang David H
12 Sep 2023
See Remarks
Sold on a plan
86,427
$18.03
$1.56M
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