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 416,500 shares of ACMR stock, worth $7.36 Million. This represents 0.46% of its overall portfolio holdings.

Number of Shares
416,500
Previous 441,130 5.58%
Holding current value
$7.36 Million
Previous $10.2 Million 16.89%
% of portfolio
0.46%
Previous 0.65%

Shares

14 transactions
Quarter Operation Price Per share shares change shares Held SEC Form
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

About ACM Research, Inc.


  • Ticker ACMR
  • Exchange NASDAQ
  • Sector Technology
  • Industry Semiconductor Equipment & Materials
  • Shares Outstandng 54,181,200
  • Market Cap $958M
  • 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...
More about ACMR
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