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United States Semiconductors & Semiconductor Equipment

ACM Research Inc (ACMR)

Track

Over the last 90 days, ACM Research Inc. has seen significant insider selling activity, with a total sell value exceeding $47 million. There were no reported insider purchases. The stock has experienced a notable price increase of 63.4% in the same period, reaching its 52-week high.
Stock chart
Ticker: ACMR Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Cheav Sotheara
See remarks
4 sales — total 400,000 USD
Planned sale 5 Jun 2026
Value US$3,036,016.39 | Price 31.20 | Shares 40,002
Planned sale 5 Jun 2026
Value US$1,336,839.43 | Price 284.76 | Shares 34,234
Planned sale 5 Jun 2026
Value US$100,000.00 | Price 82.61 | Shares 1,000
Planned sale 5 Jun 2026
Value US$100,000.00 | Price 81.73 | Shares 1,000
Proposed sale 5 Jun 2026
Value US$938,803.99 | Price 457.12 | Shares 34,739
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 85.77 | Shares 1,000
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 85.11 | Shares 1,000
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 84.08 | Shares 1,000
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 87.91 | Shares 1,000
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 87.13 | Shares 1,000
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 86.07 | Shares 1,000
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 85.11 | Shares 1,000
Planned sale 4 Jun 2026
Value US$100,000.00 | Price 83.86 | Shares 1,000
Proposed sale 4 Jun 2026
Value US$100,000.00 | Price 85.15 | Shares 1,000
Proposed sale 4 Jun 2026
Value US$100,000.00 | Price 85.80 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 93.04 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 92.38 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 90.78 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 89.84 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 88.98 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 87.57 | Shares 1,000
Proposed sale 3 Jun 2026
Value US$100,000.00 | Price 90.05 | Shares 1,000
Planned sale 19 May 2026
Value US$125,489.32 | Price 67.54 | Shares 1,858
Planned sale 19 May 2026
Value US$87,977.89 | Price 67.21 | Shares 1,309
Planned sale 19 May 2026
Value US$32,545.00 | Price 65.09 | Shares 500
Planned sale 19 May 2026
Value US$85,098.72 | Price 63.84 | Shares 1,333
Proposed sale 19 May 2026
Value US$331,119.50 | Price 66.22 | Shares 5,000
Planned sale 17 Apr 2026
Value US$260,000.00 | Price 52.00 | Shares 5,000
Proposed sale 17 Apr 2026
Value US$260,001.00 | Price 52.00 | Shares 5,000
Planned sale 12 Mar 2026
Value US$26,265.48 | Price 46.57 | Shares 564
Planned sale 12 Mar 2026
Value US$1,342,377.52 | Price 45.74 | Shares 29,348
Planned sale 12 Mar 2026
Value US$388,236.66 | Price 44.94 | Shares 8,639
Planned sale 12 Mar 2026
Value US$45,712.10 | Price 46.55 | Shares 982
Planned sale 12 Mar 2026
Value US$2,154,719.92 | Price 45.74 | Shares 47,108
Planned sale 12 Mar 2026
Value US$534,639.90 | Price 44.89 | Shares 11,910
Planned sale 12 Mar 2026
Value US$32,692.14 | Price 46.57 | Shares 702
Planned sale 12 Mar 2026
Value US$1,771,830.38 | Price 45.74 | Shares 38,737
Planned sale 12 Mar 2026
Value US$474,400.12 | Price 44.92 | Shares 10,561
Proposed sale 12 Mar 2026
Value US$2,278,825.00 | Price 45.58 | Shares 50,000
Proposed sale 12 Mar 2026
Value US$4,491,743.01 | Price 45.58 | Shares 98,551
Planned sale 11 Mar 2026
Value US$223,669.18 | Price 48.34 | Shares 4,627
Planned sale 11 Mar 2026
Value US$2,651,812.97 | Price 47.89 | Shares 55,373
Planned sale 11 Mar 2026
Value US$162,940.25 | Price 48.25 | Shares 3,377
Planned sale 11 Mar 2026
Value US$555,695.63 | Price 47.81 | Shares 11,623
Proposed sale 11 Mar 2026
Value US$2,875,386.00 | Price 47.92 | Shares 60,000
Proposed sale 11 Mar 2026
Value US$718,666.50 | Price 47.91 | Shares 15,000
Planned sale 10 Mar 2026
Value US$616,060.96 | Price 48.19 | Shares 12,784
Planned sale 10 Mar 2026
Value US$1,516,084.96 | Price 47.06 | Shares 32,216
Proposed sale 10 Mar 2026
Value US$2,132,248.50 | Price 47.38 | Shares 45,000
Planned sale 9 Mar 2026
Value US$39,546.00 | Price 43.94 | Shares 900
Planned sale 9 Mar 2026
Value US$177,817.00 | Price 43.37 | Shares 4,100
Proposed sale 9 Mar 2026
Value US$217,344.00 | Price 43.47 | Shares 5,000
Planned sale 6 Mar 2026
Value US$9,316.00 | Price 46.58 | Shares 200
Planned sale 6 Mar 2026
Value US$681,836.00 | Price 46.07 | Shares 14,800
Proposed sale 6 Mar 2026
Value US$691,173.00 | Price 46.08 | Shares 15,000
Planned sale 5 Mar 2026
Value US$349,168.00 | Price 50.24 | Shares 6,950
Planned sale 5 Mar 2026
Value US$400,970.50 | Price 49.81 | Shares 8,050
Planned sale 5 Mar 2026
Value US$250,450.00 | Price 50.09 | Shares 5,000
Proposed sale 5 Mar 2026
Value US$250,485.00 | Price 50.10 | Shares 5,000
Proposed sale 5 Mar 2026
Value US$750,148.50 | Price 50.01 | Shares 15,000
Proposed sale 8 Dec 2025
Value US$797,625.00 | Price 35.45 | Shares 22,500
Planned sale 8 Dec 2025
Value US$797,625.00 | Price 35.45 | Shares 22,500
Planned sale 4 Dec 2025
Value US$34,122.96 | Price 34.26 | Shares 996
Planned sale 4 Dec 2025
Value US$259,759.00 | Price 33.50 | Shares 7,754
Planned sale 4 Dec 2025
Value US$1,383,098.86 | Price 34.42 | Shares 40,183
Planned sale 4 Dec 2025
Value US$664,265.84 | Price 33.52 | Shares 19,817
Proposed sale 4 Dec 2025
Value US$293,856.50 | Price 33.58 | Shares 8,750
Proposed sale 4 Dec 2025
Value US$2,047,410.00 | Price 34.12 | Shares 60,000
Planned sale 3 Dec 2025
Value US$40,272.00 | Price 33.56 | Shares 1,200
Planned sale 3 Dec 2025
Value US$2,273,840.00 | Price 33.05 | Shares 68,800
Planned sale 3 Dec 2025
Value US$10,071.00 | Price 33.57 | Shares 300
Planned sale 3 Dec 2025
Value US$651,085.00 | Price 33.05 | Shares 19,700
Proposed sale 3 Dec 2025
Value US$661,106.00 | Price 33.06 | Shares 20,000
Proposed sale 3 Dec 2025
Value US$2,314,172.00 | Price 33.06 | Shares 70,000
Planned sale 2 Dec 2025
Value US$3,320,000.00 | Price 33.20 | Shares 100,000
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-05 2026-06-05 PlS Planned sale
Cheav Sotheara

See remarks

Officer
40,002 +34.3%
31.20
US$3,036,016 		40,002 +34.3% 31.20 US$3,036,016
2026-06-05 2026-06-05 PlS Planned sale
Cheav Sotheara

See remarks

Officer
34,234 -15.4%
284.76
US$1,336,839 		34,234 -15.4% 284.76 US$1,336,839
2026-06-05 2026-06-05 PlS Planned sale
Cheav Sotheara

See remarks

Officer
17,748 +48.9%
84.48
US$326,412 		17,748 +48.9% 84.48 US$326,412
2026-06-05 2026-06-05 PlS Planned sale
Cheav Sotheara

See remarks

Officer
1,000 -2.3%
81.73
US$100,000 		1,000 -2.3% 81.73 US$100,000
2026-06-05 2026-06-05 PrS Proposed sale
SOTHEARA CHEAV

Officer

Officer
1,000
83.18
US$100,000 		1,000 83.18 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Cheav Sotheara

See remarks

Officer
1,000 -2.8%
85.77
US$100,000 		1,000 -2.8% 85.77 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Cheav Sotheara

See remarks

Officer
1,000 -8.2%
85.11
US$100,000 		1,000 -8.2% 85.11 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Cheav Sotheara

See remarks

Officer
1,000 -1.1%
84.08
US$100,000 		1,000 -1.1% 84.08 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -0.1%
87.91
US$100,000 		1,000 -0.1% 87.91 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -1.1%
87.13
US$100,000 		1,000 -1.1% 87.13 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -1.3%
86.07
US$100,000 		1,000 -1.3% 86.07 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -2.1%
85.11
US$100,000 		1,000 -2.1% 85.11 US$100,000
2026-06-05 2026-06-04 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -0.2%
83.86
US$100,000 		1,000 -0.2% 83.86 US$100,000
2026-06-04 2026-06-04 PrS Proposed sale
SOTHEARA CHEAV

Officer

Officer
1,000
85.15
US$100,000 		1,000 85.15 US$100,000
2026-06-04 2026-06-04 PrS Proposed sale
HUI WANG

Officer; Director; 10% Stockholder

Executive Director Large shareholder
1,000
85.80
US$100,000 		1,000 85.80 US$100,000
2026-06-05 2026-06-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -0.1%
93.04
US$100,000 		1,000 -0.1% 93.04 US$100,000
2026-06-05 2026-06-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -0.7%
92.38
US$100,000 		1,000 -0.7% 92.38 US$100,000
2026-06-05 2026-06-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -1.2%
90.78
US$100,000 		1,000 -1.2% 90.78 US$100,000
2026-06-05 2026-06-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -3.8%
89.84
US$100,000 		1,000 -3.8% 89.84 US$100,000
2026-06-05 2026-06-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -0.7%
88.98
US$100,000 		1,000 -0.7% 88.98 US$100,000
2026-06-05 2026-06-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,000 -0.5%
87.57
US$100,000 		1,000 -0.5% 87.57 US$100,000
2026-06-03 2026-06-03 PrS Proposed sale
HUI WANG

Officer; Director; 10% Stockholder

Executive Director Large shareholder
1,000
90.05
US$100,000 		1,000 90.05 US$100,000
2026-05-21 2026-05-19 PlS Planned sale
Dun Haiping
Non-Executive Director
1,858 -100.0%
67.54
US$125,489 		1,858 -100.0% 67.54 US$125,489
2026-05-21 2026-05-19 PlS Planned sale
Dun Haiping
Non-Executive Director
1,309 -41.3%
67.21
US$87,978 		1,309 -41.3% 67.21 US$87,978
2026-05-21 2026-05-19 PlS Planned sale
Dun Haiping
Non-Executive Director
500 -13.6%
65.09
US$32,545 		500 -13.6% 65.09 US$32,545
2026-05-21 2026-05-19 PlS Planned sale
Dun Haiping
Non-Executive Director
1,333 -26.7%
63.84
US$85,099 		1,333 -26.7% 63.84 US$85,099
2026-05-19 2026-05-19 PrS Proposed sale
HAIPING DUN

Director

Non-Executive Director
5,000
66.22
US$331,120 		5,000 66.22 US$331,120
2026-04-21 2026-04-17 PlS Planned sale
Pappis Charles C
Non-Executive Director
5,000 -100.0%
52.00
US$260,000 		5,000 -100.0% 52.00 US$260,000
2026-04-17 2026-04-17 PrS Proposed sale
CHARLES PAPPIS

Director

Non-Executive Director
5,000
52.00
US$260,001 		5,000 52.00 US$260,001
2026-03-13 2026-03-12 PlS Planned sale
McKechnie Mark

See Remarks

Officer
564 -38.5%
46.57
US$26,265 		564 -38.5% 46.57 US$26,265
2026-03-13 2026-03-12 PlS Planned sale
McKechnie Mark

See Remarks

Officer
29,348 -95.2%
45.74
US$1,342,378 		29,348 -95.2% 45.74 US$1,342,378
2026-03-13 2026-03-12 PlS Planned sale
McKechnie Mark

See Remarks

Officer
8,639 -21.9%
44.94
US$388,237 		8,639 -21.9% 44.94 US$388,237
2026-03-13 2026-03-12 PlS Planned sale
McKechnie Mark

See Remarks

Officer
982 -52.2%
46.55
US$45,712 		982 -52.2% 46.55 US$45,712
2026-03-13 2026-03-12 PlS Planned sale
McKechnie Mark

See Remarks

Officer
47,108 -96.2%
45.74
US$2,154,720 		47,108 -96.2% 45.74 US$2,154,720
2026-03-13 2026-03-12 PlS Planned sale
McKechnie Mark

See Remarks

Officer
11,910 -19.6%
44.89
US$534,640 		11,910 -19.6% 44.89 US$534,640
2026-03-13 2026-03-12 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
702 -0.1%
46.57
US$32,692 		702 -0.1% 46.57 US$32,692
2026-03-13 2026-03-12 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
38,737 -4.6%
45.74
US$1,771,830 		38,737 -4.6% 45.74 US$1,771,830
2026-03-13 2026-03-12 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
10,561 -1.2%
44.92
US$474,400 		10,561 -1.2% 44.92 US$474,400
2026-03-12 2026-03-12 PrS Proposed sale
HUI WANG

Officer; Director; 10% Stockholder

Executive Director Large shareholder
50,000
45.58
US$2,278,825 		50,000 45.58 US$2,278,825
2026-03-12 2026-03-12 PrS Proposed sale
MARK A MCKECHNIE

Officer

Officer
98,551
45.58
US$4,491,743 		98,551 45.58 US$4,491,743
2026-03-13 2026-03-11 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
4,627 -0.6%
48.34
US$223,669 		4,627 -0.6% 48.34 US$223,669
2026-03-13 2026-03-11 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
55,373 -6.4%
47.89
US$2,651,813 		55,373 -6.4% 47.89 US$2,651,813
2026-03-12 2026-03-11 PlS Planned sale
Liu Tracy
Non-Executive Director
3,377 -3.0%
48.25
US$162,940 		3,377 -3.0% 48.25 US$162,940
2026-03-12 2026-03-11 PlS Planned sale
Liu Tracy
Non-Executive Director
11,623 -9.2%
47.81
US$555,696 		11,623 -9.2% 47.81 US$555,696
2026-03-11 2026-03-11 PrS Proposed sale
HUI WANG

Officer; Director; 10% Stockholder

Executive Director Large shareholder
60,000
47.92
US$2,875,386 		60,000 47.92 US$2,875,386
2026-03-11 2026-03-11 PrS Proposed sale
TRACY DONG LIU

Director

Non-Executive Director
15,000
47.91
US$718,666 		15,000 47.91 US$718,666
2026-03-12 2026-03-10 PlS Planned sale
Liu Tracy
Non-Executive Director
12,784 -10.3%
48.19
US$616,061 		12,784 -10.3% 48.19 US$616,061
2026-03-12 2026-03-10 PlS Planned sale
Liu Tracy
Non-Executive Director
32,216 -20.7%
47.06
US$1,516,085 		32,216 -20.7% 47.06 US$1,516,085
2026-03-10 2026-03-10 PrS Proposed sale
TRACY DONG LIU

Director

Non-Executive Director
45,000
47.38
US$2,132,248 		45,000 47.38 US$2,132,248
2026-03-11 2026-03-09 PlS Planned sale
Dun Haiping
Non-Executive Director
900 -100.0%
43.94
US$39,546 		900 -100.0% 43.94 US$39,546
2026-03-11 2026-03-09 PlS Planned sale
Dun Haiping
Non-Executive Director
4,100 -82.0%
43.37
US$177,817 		4,100 -82.0% 43.37 US$177,817
2026-03-09 2026-03-09 PrS Proposed sale
HAIPING DUN

Director

Non-Executive Director
5,000
43.47
US$217,344 		5,000 43.47 US$217,344
2026-03-09 2026-03-06 PlS Planned sale
Feng Lisa

See remarks

Officer
200 -0.4%
46.58
US$9,316 		200 -0.4% 46.58 US$9,316
2026-03-09 2026-03-06 PlS Planned sale
Feng Lisa

See remarks

Officer
14,800 -22.8%
46.07
US$681,836 		14,800 -22.8% 46.07 US$681,836
2026-03-06 2026-03-06 PrS Proposed sale
LISA YI LU FENG

Officer

Officer
15,000
46.08
US$691,173 		15,000 46.08 US$691,173
2026-03-09 2026-03-05 PlS Planned sale
Feng Lisa

See remarks

Officer
6,950 -12.2%
50.24
US$349,168 		6,950 -12.2% 50.24 US$349,168
2026-03-09 2026-03-05 PlS Planned sale
Feng Lisa

See remarks

Officer
8,050 -12.4%
49.81
US$400,970 		8,050 -12.4% 49.81 US$400,970
2026-03-09 2026-03-05 PlS Planned sale
Pappis Charles C
Non-Executive Director
5,000 -100.0%
50.09
US$250,450 		5,000 -100.0% 50.09 US$250,450
2026-03-05 2026-03-05 PrS Proposed sale
CHARLES PAPPIS

Director

Non-Executive Director
5,000
50.10
US$250,485 		5,000 50.10 US$250,485
2026-03-05 2026-03-05 PrS Proposed sale
LISA YI LU FENG

Officer

Officer
15,000
50.01
US$750,148 		15,000 50.01 US$750,148
2025-12-08 2025-12-08 PrS Proposed sale
MARK A MCKECHNIE

Officer

Officer
22,500
35.45
US$797,625 		22,500 35.45 US$797,625
2025-12-08 2025-12-08 PlS Planned sale
McKechnie Mark

See Remarks

Officer
22,500 -96.2%
35.45
US$797,625 		22,500 -96.2% 35.45 US$797,625
2025-12-08 2025-12-04 PlS Planned sale
McKechnie Mark

See Remarks

Officer
996 -52.5%
34.26
US$34,123 		996 -52.5% 34.26 US$34,123
2025-12-08 2025-12-04 PlS Planned sale
McKechnie Mark

See Remarks

Officer
7,754 -80.4%
33.50
US$259,759 		7,754 -80.4% 33.50 US$259,759
2025-12-05 2025-12-04 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
40,183 -4.8%
34.42
US$1,383,099 		40,183 -4.8% 34.42 US$1,383,099
2025-12-05 2025-12-04 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
19,817 -2.3%
33.52
US$664,266 		19,817 -2.3% 33.52 US$664,266
2025-12-04 2025-12-04 PrS Proposed sale
MARK A MCKECHNIE

Officer

Officer
8,750
33.58
US$293,856 		8,750 33.58 US$293,856
2025-12-04 2025-12-04 PrS Proposed sale
HUI WANG

Officer; Director; 10% Stockholder

Executive Director Large shareholder
60,000
34.12
US$2,047,410 		60,000 34.12 US$2,047,410
2025-12-05 2025-12-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
1,200 -0.1%
33.56
US$40,272 		1,200 -0.1% 33.56 US$40,272
2025-12-05 2025-12-03 PlS Planned sale
Wang David H

See Remarks

Executive Director Large shareholder
68,800 -7.9%
33.05
US$2,273,840 		68,800 -7.9% 33.05 US$2,273,840
2025-12-04 2025-12-03 PlS Planned sale
Chen Fuping

See remarks

Officer
300 -100.0%
33.57
US$10,071 		300 -100.0% 33.57 US$10,071
2025-12-04 2025-12-03 PlS Planned sale
Chen Fuping

See remarks

Officer
19,700 -98.5%
33.05
US$651,085 		19,700 -98.5% 33.05 US$651,085
2025-12-03 2025-12-03 PrS Proposed sale
FUPING CHEN

Officer

Officer
20,000
33.06
US$661,106 		20,000 33.06 US$661,106
2025-12-03 2025-12-03 PrS Proposed sale
HUI WANG

Officer; Director; 10% Stockholder

Executive Director Large shareholder
70,000
33.06
US$2,314,172 		70,000 33.06 US$2,314,172
2025-12-04 2025-12-02 PlS Planned sale
Chen Fuping

See remarks

Officer
100,000 -100.0%
33.20
US$3,320,000 		100,000 -100.0% 33.20 US$3,320,000
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