Oberweis Asset Management Inc Acm Research, Inc. Transaction History

Oberweis Asset Management Inc

$2.13 Billion
Q2 2025

A detailed history of Oberweis Asset Management Inc transactions in Acm Research, Inc. stock. As of the latest transaction made, Oberweis Asset Management Inc holds 246,960 shares of ACMR stock, worth $9.86 Million. This represents 0.3% of its overall portfolio holdings.

Number of Shares

246,960

Previous 296,948 16.83%

Holding current value

$9.86 Million

Previous $6.93 Million 7.71%

% of portfolio

0.3%

Previous 0.37%

17 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 14, 2025	SELL	$18.33 - $26.51 $916,280 - $1.33 Million	-49,988 Reduced 16.83%	246,960 $6.4 Million
Q1 2025 May 15, 2025	SELL	$15.41 - $29.98 $2.9 Million - $5.64 Million	-188,252 Reduced 38.8%	296,948 $6.93 Million
Q4 2024 Feb 14, 2025	BUY	$14.1 - $23.6 $968,670 - $1.62 Million	68,700 Added 16.49%	485,200 $7.33 Million
Q3 2024 Nov 14, 2024	SELL	$15.01 - $25.52 $369,696 - $628,557	-24,630 Reduced 5.58%	416,500 $8.45 Million
Q1 2024 May 15, 2024	BUY	$15.84 - $33.91 $756,043 - $1.62 Million	47,730 Added 12.13%	441,130 $12.9 Million
Q4 2023 Feb 14, 2024	BUY	$12.81 - $20.07 $660,996 - $1.04 Million	51,600 Added 15.1%	393,400 $7.69 Million
Q3 2023 Nov 14, 2023	BUY	$11.97 - $19.63 $672,714 - $1.1 Million	56,200 Added 19.68%	341,800 $6.19 Million
Q2 2023 Aug 14, 2023	BUY	$8.88 - $13.38 $621,600 - $936,600	70,000 Added 32.47%	285,600 $3.74 Million
Q1 2023 May 15, 2023	BUY	$9.48 - $14.18 $2.04 Million - $3.06 Million	215,600 New	215,600 $2.52 Million
Q2 2022 Aug 15, 2022	SELL	$11.63 - $22.07 $744,320 - $1.41 Million	-64,000 Closed	0 $0
Q1 2022 May 16, 2022	BUY	$15.36 - $29.83 $983,040 - $1.91 Million	64,000 New	64,000 $1.32 Million
Q2 2021 Aug 16, 2021	SELL	$21.41 - $35.58 $128,460 - $213,480	-6,000 Closed	0 $0
Q1 2021 May 17, 2021	BUY	$26.1 - $46.66 $156,600 - $279,960	6,000 New	6,000 $485,000
Q4 2020 Feb 16, 2021	SELL	$22.31 - $31.33 $230,239 - $323,325	-10,320 Closed	0 $0
Q3 2020 Nov 16, 2020	SELL	$19.66 - $37.43 $481,276 - $916,286	-24,480 Reduced 70.34%	10,320 $713,000
Q2 2020 Aug 14, 2020	BUY	$9.07 - $21.9 $88,886 - $214,620	9,800 Added 39.2%	34,800 $2.17 Million
Q1 2020 May 15, 2020	BUY	$5.75 - $16.18 $143,750 - $404,500	25,000 New	25,000 $740,000

Others Institutions Holding ACMR

# of Institutions

284

Shares Held

38M

Call Options Held

1.87M

Put Options Held

2.24M

View Full List

About ACM Research, Inc.

Ticker ACMR
Exchange NASDAQ
Sector Technology
Industry Semiconductor Equipment & Materials
Shares Outstandng 54,181,200
Market Cap $2.16B
Description
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...

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Oberweis Asset Management Inc Acm Research, Inc. Transaction History