Insider trading

Period: 12 months Stock: ACMR Minimum amount: $100K × Plan: Scheduled (10b5-1) × + Add filter Clear all
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When

Period

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

27 decisions over 12 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.

27 decisions over 12 months
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.

27 decisions over 12 months
The trade

Minimum amount

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

27 decisions over 12 months Remove this filter
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.
27 decisions over 12 months Remove this filter
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
27 decisions over 12 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.

27 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
9 Sep 2026
Wang David H See Remarks
Sold on a plan 5×
$5.22M 70,000 at 74.59
8.0%
Planned (10b5-1)
8 Sep 2026
Wang David H See Remarks
Sold on a plan 4×
$5.41M 70,000 at 77.26
8.0%
Planned (10b5-1)
20 Aug 2026
McKechnie Mark See Remarks
Sold on a plan 3×
$4.26M 55,199 at 77.27
98.4%
Sold half or more
18 Aug 2026
Dun Haiping Director
Sold on a plan 3×
$405.67K 5,000 at 81.13
100%
Sold half or more
5 Jun 2026
Cheav Sotheara See remarks
Sold on a plan 4×
$449.09K 5,399 at 83.18
5.1%
Planned (10b5-1)
4 Jun 2026
Wang David H See Remarks
Sold on a plan 5×
$3.43M 40,002 at 85.80
4.7%
Planned (10b5-1)
4 Jun 2026
Cheav Sotheara See remarks
Sold on a plan 3×
$1.14M 13,351 at 85.15
11.8%
Planned (10b5-1)
3 Jun 2026
Wang David H See Remarks
Sold on a plan 6×
$5.40M 60,000 at 90.05
7.0%
Planned (10b5-1)
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
12 Mar 2026
McKechnie Mark See Remarks
Sold on a plan 6×
$4.49M 98,551 at 45.58
99.1%
Sold half or more
12 Mar 2026
Wang David H See Remarks
Sold on a plan 3×
$2.28M 50,000 at 45.58
5.9%
Planned (10b5-1)
11 Mar 2026
Wang David H See Remarks
Sold on a plan 2×
$2.88M 60,000 at 47.92
7.0%
Planned (10b5-1)
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
6 Mar 2026
Feng Lisa See remarks
Sold on a plan 2×
$691.15K 15,000 at 46.08
23.1%
Planned (10b5-1)
5 Mar 2026
Feng Lisa See remarks
Sold on a plan 2×
$750.14K 15,000 at 50.01
23.1%
Planned (10b5-1)
5 Mar 2026
Pappis Charles C Director
Sold on a plan
$250.45K 5,000 at 50.09
100%
Sold half or more
8 Dec 2025
McKechnie Mark See Remarks
Sold on a plan
$797.63K 22,500 at 35.45
96.2%
Sold half or more
4 Dec 2025
Wang David H See Remarks
Sold on a plan 2×
$2.05M 60,000 at 34.12
7.0%
Planned (10b5-1)
4 Dec 2025
McKechnie Mark See Remarks
Sold on a plan 2×
$293.88K 8,750 at 33.59
90.7%
Sold half or more
3 Dec 2025
Wang David H See Remarks
Sold on a plan 2×
$2.31M 70,000 at 33.06
8.0%
Planned (10b5-1)
3 Dec 2025
Chen Fuping See remarks
Sold on a plan 2×
$661.16K 20,000 at 33.06
100%
Sold half or more
2 Dec 2025
Chen Fuping See remarks
Sold on a plan
$3.32M 100,000 at 33.20
100%
Sold half or more
13 Nov 2025
Feng Lisa See remarks
Sold on a plan
$506.55K 15,000 at 33.77
23.1%
Planned (10b5-1)
12 Nov 2025
Feng Lisa See remarks
Sold on a plan
$491.40K 15,000 at 32.76
23.1%
Planned (10b5-1)
Showing 1–27 of 27.