ACMR Insider Trading

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Insider Trading History
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About

Insider Ownership Percentage: 24.36%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $28,339,048.07

ACM Research Insider Trading History Chart

ACM Research Share Price & Price History

^$45.33

▲ +1.18 (2.67%)

As of 11/3/2026 04:00 PM ET

Days: 30 | 90 | 365

ACM Research Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
9/9/2026	David H. Wang	Insider	Sell	70,000	$74.59	$5,221,300.00	802,708
8/18/2026	Haiping Dun	Director	Sell	5,000	$81.13	$405,650.00	5,000
6/5/2026	Sotheara Cheav	Insider	Sell	5,399	$83.18	$449,088.82	100,002
6/4/2026	David H. Wang	Insider	Sell	40,002	$85.80	$3,432,171.60	802,708
6/4/2026	Sotheara Cheav	Insider	Sell	13,351	$85.15	$1,136,837.65	100,002
6/3/2026	David H. Wang	Insider	Sell	60,000	$90.05	$5,403,000.00	802,708
5/19/2026	Haiping Dun	Director	Sell	5,000	$66.22	$331,100.00	5,000
4/17/2026	Charles C. Pappis	Director	Sell	5,000	$52.00	$260,000.00	5,000
3/11/2026	Tracy Liu	Director	Sell	15,000	$47.91	$718,650.00	110,772
3/10/2026	Tracy Liu	Director	Sell	45,000	$47.38	$2,132,100.00	110,772
12/4/2025	David H. Wang	Insider	Sell	60,000	$34.12	$2,047,200.00	802,708
12/3/2025	David H. Wang	Insider	Sell	70,000	$33.06	$2,314,200.00	802,708
12/3/2025	Fuping Chen	Insider	Sell	20,000	$33.06	$661,200.00
12/2/2025	Fuping Chen	Insider	Sell	100,000	$33.20	$3,320,000.00
11/13/2025	Lisa Feng	Insider	Sell	15,000	$33.77	$506,550.00	50,001
9/18/2025	Jian Wang	Insider	Sell	30,000	$35.00	$1,050,000.00	253,158
9/18/2025	Sotheara Cheav	Insider	Sell	10,000	$35.00	$350,000.00	100,002
9/17/2025	Tracy Liu	Director	Sell	15,000	$33.00	$495,000.00	110,772
9/4/2025	David H. Wang	Insider	Sell	60,000	$26.44	$1,586,400.00	672,708
9/3/2025	David H. Wang	Insider	Sell	70,000	$26.76	$1,873,200.00	672,708
8/25/2025	Jian Wang	Insider	Sell	30,000	$32.00	$960,000.00	253,158
8/22/2025	Jian Wang	Insider	Sell	30,000	$30.00	$900,000.00	253,158
8/22/2025	Sotheara Cheav	Insider	Sell	11,152	$30.00	$334,560.00	100,002
7/15/2025	Tracy Liu	Director	Sell	15,000	$30.00	$450,000.00	110,772
7/7/2025	Lisa Feng	Insider	Sell	15,000	$28.00	$420,000.00	50,001
6/24/2025	Lisa Feng	Insider	Sell	15,000	$26.00	$390,000.00	50,001
5/22/2025	David H. Wang	Insider	Sell	60,000	$22.63	$1,357,800.00	672,708
5/21/2025	David H. Wang	Insider	Sell	70,000	$23.60	$1,652,000.00	672,708
3/17/2025	Chenming Hu	Director	Sell	163,308	$30.00	$4,899,240.00	100,002
3/14/2025	Haiping Dun	Director	Sell	9,518	$29.00	$276,022.00	755,090
3/13/2025	David H. Wang	Insider	Sell	37,500	$27.30	$1,023,750.00	672,708
3/11/2025	David H. Wang	Insider	Sell	56,250	$26.57	$1,494,562.50	747,708
2/6/2025	Sotheara Cheav	Insider	Sell	22,598	$23.00	$519,754.00	100,002
11/26/2024	David H. Wang	Insider	Sell	56,250	$17.89	$1,006,312.50	654,256
11/22/2024	David H. Wang	Insider	Sell	56,250	$19.08	$1,073,250.00	710,506
11/22/2024	Haiping Dun	Director	Sell	15,000	$19.12	$286,800.00	774,148
10/8/2024	Xiao Xing	Director	Sell	90,396	$21.13	$1,910,067.48	2,338,510
10/7/2024	Science & Technology Shanghai	Major Shareholder	Sell	275,000	$24.07	$6,619,250.00	2,428,906
10/4/2024	Mark Mckechnie	Insider	Sell	16,516	$22.00	$363,352.00	900
10/4/2024	Xiao Xing	Director	Sell	700,000	$21.41	$14,987,000.00	2,703,906
10/2/2024	Science & Technology Shanghai	Major Shareholder	Sell	26,300	$20.01	$526,263.00	3,403,906
10/1/2024	Xiao Xing	Director	Sell	8,304	$20.19	$167,657.76	3,430,206
6/7/2024	Jian Wang	Insider	Sell	30,000	$22.07	$662,100.00	253,158
5/29/2024	David H. Wang	Insider	Sell	86,090	$22.62	$1,947,355.80	504,018
5/29/2024	Haiping Dun	Director	Sell	19,239	$22.63	$435,378.57	855,090
5/22/2024	David H. Wang	Insider	Sell	90,000	$22.81	$2,052,900.00	590,108
5/22/2024	Haiping Dun	Director	Sell	15,000	$22.88	$343,200.00	874,329
3/14/2024	Haiping Dun	Director	Sell	19,434	$27.70	$538,321.80	855,090
3/13/2024	Sotheara Cheav	Insider	Sell	5,000	$29.09	$145,450.00	105,002
3/8/2024	David H. Wang	Insider	Sell	90,000	$30.36	$2,732,400.00	591,107
3/8/2024	Haiping Dun	Director	Sell	15,000	$30.36	$455,400.00	874,524
2/28/2024	Lisa Feng	Insider	Sell	7,500	$25.20	$189,000.00	50,001
2/28/2024	Tracy Liu	Director	Sell	12,500	$25.20	$315,000.00	110,772
1/12/2024	Mark Mckechnie	Insider	Sell	10,000	$22.00	$220,000.00	900
12/26/2023	Lisa Feng	Insider	Sell	7,500	$20.00	$150,000.00	50,001
12/26/2023	Tracy Liu	Director	Sell	10,000	$20.00	$200,000.00	110,772
11/22/2023	David H. Wang	Insider	Sell	90,000	$17.68	$1,591,200.00	588,794
11/22/2023	Haiping Dun	Director	Sell	15,000	$17.66	$264,900.00	874,074

SEC Filings (Institutional Ownership Changes) for ACM Research (NASDAQ:ACMR)

66.75% of ACM Research stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

ACM Research Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
11/4/2026	Candriam S.C.A.	10,000	$0.81M	0.0%	N/A	0.015%
11/3/2026	Kornitzer Capital Management Inc. KS	12,726	$1.03M	0.0%	-3.7%	0.020%
11/3/2026	Pictet Asset Management Holding SA	8,530	$0.69M	0.0%	+8.6%	0.013%
11/3/2026	CenterBook Partners LP	18,439	$1.49M	0.1%	-55.5%	0.029%
11/2/2026	Pekin Hardy Strauss Inc.	5,000	$0.41M	0.0%	N/A	0.008%
11/2/2026	Commonwealth Equity Services LLC	4,285	$0.35M	0.0%	-9.0%	0.007%
10/31/2026	Chicago Partners Investment Group LLC	4,628	$0.23M	0.0%	-4.7%	0.007%
10/30/2026	Prescott Group Capital Management L.L.C.	6,000	$0.49M	0.0%	N/A	0.009%
10/30/2026	Integrity Alliance LLC.	5,184	$0.42M	0.0%	N/A	0.008%
10/30/2026	Oregon Public Employees Retirement Fund	13,219	$1.07M	0.0%	+1.9%	0.020%
10/29/2026	Mirae Asset Global Investments Co. Ltd.	6,398	$0.52M	0.0%	N/A	0.010%
10/29/2026	Profund Advisors LLC	2,678	$0.22M	0.0%	-14.8%	0.004%
10/29/2026	Summit Global Investments	13,370	$1.08M	0.1%	-2.8%	0.021%
10/28/2026	VIRGINIA RETIREMENT SYSTEMS ET Al	7,300	$0.59M	0.0%	+49.0%	0.011%
10/24/2026	Apollon Wealth Management LLC	2,706	$0.22M	0.0%	-9.4%	0.004%
10/24/2026	Capelight Capital Asset Management LP	10,000	$0.81M	0.3%	N/A	0.015%
10/23/2026	Signaturefd LLC	523	$42K	0.0%	+407.8%	0.001%
10/23/2026	Kendall Capital Management	65,515	$5.30M	0.9%	-10.0%	0.101%
10/23/2026	Sterling Capital Management LLC	1,880	$0.15M	0.0%	+894.7%	0.003%
10/23/2026	James Investment Research Inc.	32,400	$2.62M	0.3%	+9.3%	0.050%
10/23/2026	Inspire Investing LLC	68,172	$5.52M	0.2%	+8.3%	0.105%
10/22/2026	Yousif Capital Management LLC	15,433	$1.25M	0.0%	+2.7%	0.024%
10/21/2026	Crossmark Global Holdings Inc.	2,540	$0.21M	0.0%	+50.5%	0.004%
10/21/2026	Guardian Partners Inc.	435	$35K	0.0%	-36.5%	0.001%
10/21/2026	Capstone Capital Management Ltd	19,585	$1.59M	0.6%	+17.7%	0.030%
10/20/2026	AMI Asset Management Corp	6,399	$0.52M	0.0%	N/A	0.010%
10/15/2026	State of Alaska Department of Revenue	14,613	$1.18M	0.0%	-29.2%	0.023%
10/14/2026	ProCore Advisors LLC	4,461	$0.36M	0.4%	+6.0%	0.007%
10/13/2026	Contravisory Investment Management Inc.	5,739	$0.46M	0.1%	+10.0%	0.009%
10/13/2026	NorthCrest Asset Manangement LLC	25,435	$2.06M	0.0%	-6.5%	0.039%
10/9/2026	GAMMA Investing LLC	1,713	$0.14M	0.0%	+19.0%	0.003%
10/8/2026	CoreCap Advisors LLC	2,132	$0.17M	0.0%	-60.6%	0.003%
10/6/2026	Congress Asset Management Co.	277,150	$22.43M	0.1%	+23.8%	0.429%
10/5/2026	Violich Capital Management Inc.	4,350	$0.35M	0.0%	-18.7%	0.007%
9/9/2026	Sequoia Financial Advisors LLC	2,616	$0.33M	0.0%	N/A	0.004%
9/9/2026	Engineers Gate Manager LP	2,505	$0.32M	0.0%	-94.2%	0.004%
9/9/2026	Integrated Wealth Concepts LLC	2,727	$0.35M	0.0%	N/A	0.004%
9/9/2026	Steamboat Capital Partners LLC	182,773	$23.19M	5.0%	-18.2%	0.283%
9/8/2026	Arizona State Retirement System	14,238	$1.81M	0.0%	-3.8%	0.022%
9/8/2026	Nykredit A S	1,365	$0.17M	0.0%	N/A	0.002%
8/25/2026	VIRGINIA RETIREMENT SYSTEMS ET Al	4,900	$0.62M	0.0%	N/A	0.008%
8/22/2026	Odyssean LLC	19,180	$2.43M	0.4%	+26.7%	0.030%
8/22/2026	Raiffeisen Bank International AG	360,000	$42.80M	0.5%	-5.3%	0.557%
8/21/2026	AXQ Capital LP	4,089	$0.52M	0.1%	N/A	0.006%
8/21/2026	Nykredit A S	1,365	$0.17M	0.0%	N/A	0.002%
8/21/2026	Beacon Financial Advisory LLC	13,850	$1.76M	0.3%	-1.5%	0.021%
8/20/2026	Teza Capital Management LLC	3,754	$0.48M	0.9%	N/A	0.006%
8/20/2026	Kerrisdale Advisers LLC	62,570	$7.94M	2.0%	-72.0%	0.097%
8/20/2026	RPg Family Wealth Advisory LLC	98,166	$12.46M	2.0%	+7.8%	0.152%
8/19/2026	SPX Gestao de Recursos Ltda	13,815	$1.75M	0.2%	N/A	0.021%
8/19/2026	Wellington Management Group LLP	174,987	$22.20M	0.0%	N/A	0.271%
8/11/2026	Telligent Fund LP	4,000	$0.51M	0.4%	N/A	0.007%
8/6/2026	Bank of New York Mellon Corp	326,284	$41.40M	0.0%	N/A	0.533%
7/10/2026	Handelsbanken Fonder AB	20,900	$2.65M	0.0%	+31.4%	0.034%
7/9/2026	Key Client Fiduciary Advisors LLC	1,985	$0.25M	0.1%	N/A	0.003%
7/9/2026	Contravisory Investment Management Inc.	5,216	$0.66M	0.1%	+2.3%	0.009%
7/8/2026	FNY Investment Advisers LLC	7,000	$0.89M	0.3%	N/A	0.011%
7/8/2026	Palouse Capital Management Inc.	2,210	$0.28M	0.2%	-31.3%	0.004%
7/7/2026	GAMMA Investing LLC	1,440	$0.18M	0.0%	+14.5%	0.002%
7/7/2026	Harbor Investment Advisory LLC	738	$94K	0.0%	+195.2%	0.001%
7/7/2026	CoreCap Advisors LLC	5,410	$0.69M	0.0%	-25.0%	0.009%
6/3/2026	NewEdge Advisors LLC	1,087	$43K	0.0%	+381.0%	0.002%
5/22/2026	Segall Bryant & Hamill LLC	87,964	$3.46M	0.0%	-17.4%	0.144%
5/19/2026	Bank of America Corp DE	402,412	$15.84M	0.0%	+33.4%	0.657%
5/19/2026	Janus Henderson Group PLC	1,085,634	$42.70M	0.0%	+0.2%	1.773%
5/19/2026	Cim LLC	14,749	$0.58M	0.1%	-8.9%	0.024%
5/18/2026	California State Teachers Retirement System	63,131	$2.48M	0.0%	+32.4%	0.103%
5/18/2026	Royal Bank of Canada	4,118	$0.16M	0.0%	+26.0%	0.007%
5/16/2026	The Manufacturers Life Insurance Company	24,785	$0.98M	0.0%	-0.7%	0.040%
5/16/2026	Quantinno Capital Management LP	53,925	$2.12M	0.0%	-2.5%	0.088%
5/16/2026	Lazard Asset Management LLC	43,034	$1.69M	0.0%	N/A	0.070%
5/15/2026	Cypress Capital Group	15,820	$0.62M	0.1%	N/A	0.026%
5/14/2026	Healthcare of Ontario Pension Plan Trust Fund	57,148	$2.25M	0.0%	N/A	0.093%
5/14/2026	Renaissance Technologies LLC	122,600	$4.82M	0.0%	-1.5%	0.200%
5/14/2026	Public Employees Retirement System of Ohio	26,055	$1.03M	0.0%	N/A	0.043%
5/14/2026	Inceptionr LLC	6,203	$0.24M	0.1%	N/A	0.010%
5/14/2026	Sei Investments Co.	85,005	$3.35M	0.0%	+45.4%	0.139%
5/13/2026	Cetera Investment Advisers	8,796	$0.35M	0.0%	+22.6%	0.014%
5/13/2026	First Trust Advisors LP	373,987	$14.72M	0.0%	+73.7%	0.611%
5/8/2026	Summit Global Investments	8,592	$0.34M	0.0%	N/A	0.014%
5/7/2026	WCM Investment Management LLC	1,860,874	$70.58M	0.2%	+16,878.8%	3.040%
5/7/2026	Dimensional Fund Advisors LP	719,023	$28.29M	0.0%	+207.6%	1.174%
5/7/2026	KBC Group NV	1,698	$67K	0.0%	-25.4%	0.003%
5/7/2026	Swiss National Bank	106,600	$4.20M	0.0%	+1.5%	0.174%
5/6/2026	Bessemer Group Inc.	55,933	$2.20M	0.0%	-33.2%	0.091%
5/6/2026	Allspring Global Investments Holdings LLC	14,815	$0.60M	0.0%	-39.3%	0.024%
5/5/2026	Bank of New York Mellon Corp	314,609	$12.38M	0.0%	-3.2%	0.514%
5/5/2026	Illinois Municipal Retirement Fund	31,532	$1.24M	0.0%	+30.5%	0.052%
5/5/2026	Harel Insurance Investments & Financial Services Ltd.	2,040	$80K	0.0%	N/A	0.003%
5/4/2026	Empirical Financial Services LLC d.b.a. Empirical Wealth Management	23,427	$0.92M	0.0%	-10.3%	0.038%
5/4/2026	Illumine Investment Management LLC	21,916	$0.86M	0.7%	-21.8%	0.036%
5/4/2026	Principal Financial Group Inc.	340,724	$13.41M	0.0%	-11.1%	0.557%
5/4/2026	First Growth Capital LLC	5,598	$0.23M	0.2%	+5.4%	0.009%
5/4/2026	Chicago Partners Investment Group LLC	4,576	$0.18M	0.0%	-7.9%	0.007%
5/4/2026	Matthews International Capital Management LLC	138,815	$5.46M	2.2%	-25.9%	0.227%
5/1/2026	Fifth Third Bancorp	11,414	$0.45M	0.0%	+11,546.9%	0.019%
4/27/2026	New York State Teachers Retirement System	33,740	$1.33M	0.0%	-2.9%	0.056%
4/27/2026	Capelight Capital Asset Management LP	30,000	$1.18M	0.8%	-40.0%	0.049%
4/27/2026	Y Intercept Hong Kong Ltd	76,212	$3M	0.1%	N/A	0.126%
4/25/2026	Strs Ohio	15,500	$0.61M	0.0%	+131.3%	0.026%

Data available starting January 2016

ACM Research, Inc., together with its subsidiaries, develops, manufactures, and sells single-wafer wet cleaning equipment for enhancing the manufacturing process and yield for integrated chips worldwide. It offers space alternated phase shift technology for flat and patterned wafer surfaces, which employs alternating phases of megasonic waves to deliver megasonic energy in a uniform manner on a microscopic level; timely energized bubble oscillation technology for patterned wafer surfaces at advanced process nodes, which provides cleaning for 2D and 3D patterned wafers; Tahoe technology for delivering cleaning performance using less sulfuric acid and hydrogen peroxide; and electro-chemical plating technology for advanced metal plating. The company markets and sells its products under the SAPS, TEBO, ULTRA C, ULTRA Fn, Ultra ECP, Ultra ECP map, and Ultra ECP ap trademarks through direct sales force and third-party representatives. ACM Research, Inc. was incorporated in 1998 and is headquartered in Fremont, California.

Today's Range

Now: $45.33

$44.23

$46.75

50 Day Range

MA: $67.14

$44.15

$83.58

52 Week Range

Now: $45.33

$28.46

$127.19

Volume

1,318,927 shs

Average Volume

1,139,090 shs

Market Capitalization

$2.93 billion

P/E Ratio

37.42

Dividend Yield

N/A

Beta

2.27

Who are the company insiders with the largest holdings of ACM Research?: ACM Research's top insider shareholders include:
Xiao Xing (Director)
Science & Technology Shanghai (Major Shareholder)
Haiping Dun (Director)
David H Wang (Insider)
Jian Wang (Insider)
David H Wang (Major Shareholder)
Sotheara Cheav (Insider)
Tracy Liu (Director)
Chenming Hu (Director)
Lisa Feng (Insider)
Learn More about top insider investors at ACM Research.
Who are the major institutional investors of ACM Research?: ACM Research's top institutional investors include:
Congress Asset Management Co. — 0.43%
Inspire Investing LLC — 0.11%
Kendall Capital Management — 0.10%
James Investment Research Inc. — 0.05%
NorthCrest Asset Manangement LLC — 0.04%
Capstone Capital Management Ltd — 0.03%
Learn More about top institutional investors of ACM Research stock.
Which institutional investors are selling ACM Research stock?: Within the last quarter, ACMR stock was sold by these institutional investors:
CenterBook Partners LP
Kendall Capital Management
State of Alaska Department of Revenue
CoreCap Advisors LLC
NorthCrest Asset Manangement LLC
Violich Capital Management Inc.
Kornitzer Capital Management Inc. KS
Profund Advisors LLC
Within the previous year, company insiders that have sold ACM Research company stock include:
David H Wang (Insider)
Tracy Liu (Director)
Sotheara Cheav (Insider)
Lisa Feng (Insider)
Charles C Pappis (Director)
Haiping Dun (Director)
Fuping Chen (Insider)
Learn More investors selling ACM Research stock.
Which institutional investors are buying ACM Research stock?: In the last quarter, ACMR stock was acquired by institutional investors including:
Congress Asset Management Co.
Candriam S.C.A.
Capelight Capital Asset Management LP
AMI Asset Management Corp
Mirae Asset Global Investments Co. Ltd.
Prescott Group Capital Management L.L.C.
Inspire Investing LLC
Integrity Alliance LLC.