Insider trading

Period: 120 months Stock: ACMR Role: Directors × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

57 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

57 decisions over 120 months Remove this filter
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

57 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

57 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
57 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
57 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

57 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
18 Aug 2026
Dun Haiping Director
Sold on a plan 3×
$405.67K 5,000 at 81.13
100%
Sold half or more
19 May 2026
Dun Haiping Director
Sold on a plan 4×
$331.11K 5,000 at 66.22
100%
Sold half or more
17 Apr 2026
Pappis Charles C Director
Sold on a plan
$260.00K 5,000 at 52.00
100%
Sold half or more
11 Mar 2026
Liu Tracy Director
Sold on a plan 2×
$718.64K 15,000 at 47.91
11.9%
Planned (10b5-1)
10 Mar 2026
Liu Tracy Director
Sold on a plan 2×
$2.13M 45,000 at 47.38
28.9%
Planned (10b5-1)
9 Mar 2026
Dun Haiping Director
Sold on a plan 2×
$217.36K 5,000 at 43.47
100%
Sold half or more
5 Mar 2026
Pappis Charles C Director
Sold on a plan
$250.45K 5,000 at 50.09
100%
Sold half or more
17 Sep 2025
Liu Tracy Director
Sold on a plan
$495.00K 15,000 at 33.00
11.9%
Planned (10b5-1)
15 Jul 2025
Liu Tracy Director
Sold on a plan
$450.00K 15,000 at 30.00
11.9%
Planned (10b5-1)
17 Mar 2025
Hu Chenming Director
Sold on a plan
$4.90M 163,308 at 30.00
62.0%
Sold half or more
14 Mar 2025
Dun Haiping Director
Sold on a plan 2×
$275.98K 9,518 at 29.00
1.2%
Planned (10b5-1)
10 Mar 2025
Dun Haiping Director
Sold on a plan
$398.13K 15,001 at 26.54
1.9%
Planned (10b5-1)
29 Nov 2024
Dun Haiping Director
Sold on a plan
$332.18K 19,058 at 17.43
2.5%
Planned (10b5-1)
22 Nov 2024
Dun Haiping Director
Sold on a plan
$286.80K 15,000 at 19.12
1.9%
Planned (10b5-1)
8 Oct 2024
Xing Xiao Director · indirect
Sold on a plan
$1.91M 90,396 at 21.13
3.7%
Planned (10b5-1)
7 Oct 2024
Xing Xiao Director · indirect
Sold on a plan 3×
$6.62M 275,000 at 24.08
10.2%
Planned (10b5-1)
4 Oct 2024
Xing Xiao Director · indirect
Sold on a plan 2×
$14.99M 700,000 at 21.41
20.6%
Planned (10b5-1)
2 Oct 2024
Xing Xiao Director · indirect
Sold on a plan
$526.26K 26,300 at 20.01
0.8%
Planned (10b5-1)
1 Oct 2024
Xing Xiao Director · indirect
Sold on a plan
$167.66K 8,304 at 20.19
0.2%
Planned (10b5-1)
29 Aug 2024
Dun Haiping Director
Sold on a plan
$345.27K 19,097 at 18.08
2.5%
Planned (10b5-1)
22 Aug 2024
Dun Haiping Director
Sold on a plan
$297.75K 15,000 at 19.85
1.9%
Planned (10b5-1)
29 May 2024
Dun Haiping Director
Sold on a plan
$435.38K 19,239 at 22.63
2.2%
Planned (10b5-1)
22 May 2024
Dun Haiping Director
Sold on a plan
$343.20K 15,000 at 22.88
1.7%
Planned (10b5-1)
14 Mar 2024
Dun Haiping Director
Sold on a plan 2×
$538.38K 19,434 at 27.70
2.2%
Planned (10b5-1)
8 Mar 2024
Dun Haiping Director
Sold on a plan
$455.40K 15,000 at 30.36
1.7%
Planned (10b5-1)
28 Feb 2024
Liu Tracy Director
Sold on a plan
$315.00K 12,500 at 25.20
10.1%
Planned (10b5-1)
26 Dec 2023
Liu Tracy Director
Sold on a plan
$200.00K 10,000 at 20.00
8.3%
Planned (10b5-1)
29 Nov 2023
Dun Haiping Director
Sold on a plan
$327.47K 18,984 at 17.25
2.2%
Planned (10b5-1)
22 Nov 2023
Dun Haiping Director
Sold on a plan
$264.90K 15,000 at 17.66
1.7%
Planned (10b5-1)
20 Nov 2023
Liu Tracy Director
Sold on a plan
$268.65K 15,000 at 17.91
28.9%
Planned (10b5-1)
22 Aug 2023
Dun Haiping Director
Sold at will
$444.56K 32,098 at 13.85
3.6%
Not planned
1 Jun 2023
Dun Haiping Director
Sold at will
$375.00K 37,500 at 10.00
4.1%
Not planned
16 Mar 2023
Dun Haiping Director
Sold at will
$452.25K 37,500 at 12.06
4.0%
Not planned
30 Nov 2022
Dun Haiping Director
Sold, plan not stated
$297.81K 35,327 at 8.43
3.8%
22 Aug 2022
Dun Haiping Director
Sold, plan not stated
$588.25K 36,537 at 16.10
4.1%
15 Aug 2022
Dun Haiping Director
Bought
$704.09K 36,519 at 19.28
4.3%
First buy on file
27 May 2022
Dun Haiping Director
Sold, plan not stated
$542.25K 36,150 at 15.00
4.1%
9 Mar 2022
Dun Haiping Director
Sold, plan not stated 3×
$1.01M 12,269 at 82.09
4.0%
24 Aug 2021
Xiang Yinan Director · indirect
Sold, plan not stated 3×
$21.50M 244,629 at 87.88
17.6%
23 Aug 2021
Xiang Yinan Director · indirect
Sold, plan not stated
$2.99M 35,136 at 85.03
2.5%
18 Aug 2021
Xiang Yinan Director · indirect
Sold, plan not stated 2×
$2.27M 26,612 at 85.12
1.8%
13 Aug 2021
Xiang Yinan Director · indirect
Sold, plan not stated
$308.31K 3,623 at 85.10
0.2%
12 Aug 2021
Xiang Yinan Director · indirect
Sold, plan not stated
$1.71M 20,000 at 85.33
1.4%
11 Aug 2021
Xiang Yinan Director · indirect
Sold, plan not stated 4×
$2.58M 30,000 at 86.11
2.0%
12 Feb 2021
Hu Chenming Director
Sold, plan not stated
$1.20M 10,000 at 120.00
32.2%
12 Feb 2021
Liu Tracy Director
Sold, plan not stated
$240.00K 2,000 at 120.00
5.1%
10 Feb 2021
Liu Tracy Director
Sold, plan not stated
$176.00K 1,600 at 110.00
3.9%
9 Feb 2021
Liu Tracy Director
Sold, plan not stated
$44.00K 400 at 110.00
1.0%
6 Jan 2021
Liu Tracy Director
Sold, plan not stated
$200.00K 2,000 at 100.00
4.7%
22 Dec 2020
Xiang Yinan Director · indirect
Sold, plan not stated
$1.12M 14,920 at 75.00
1.0%
Showing 1–50 of 57. Page 1 of 2 Older →