1. ACM Research Inc - Ordinary Shares - Class A
  2. ACM Research Inc - Ordinary Shares - Class A Ownership

Historical shareholding details of Oberweis Asset Management Inc holdings in ACM Research Inc - Ordinary Shares - Class A (ACMR)

Monthly changes of Oberweis Asset Management Inc shareholding in ACM Research Inc - Ordinary Shares - Class A over the previous months

Month Name Total no. shares held Percent Holding
Mar 31, 2025 Oberweis Asset Management Inc 970,400 1.54%
Feb 28, 2025 Oberweis Asset Management Inc 970,400 1.54%
Jan 31, 2025 Oberweis Asset Management Inc 833,000 1.33%
Dec 31, 2024 Oberweis Asset Management Inc 485,200 0.77%
Dec 31, 2024 Oberweis Asset Management Inc 833,000 1.33%
Nov 30, 2024 Oberweis Asset Management Inc 833,000 1.33%
Oct 31, 2024 Oberweis Asset Management Inc 877,800 1.41%
Sep 30, 2024 Oberweis Asset Management Inc 416,500 0.67%
Sep 30, 2024 Oberweis Asset Management Inc 877,800 1.41%
Aug 31, 2024 Oberweis Asset Management Inc 877,800 1.41%
Jul 31, 2024 Oberweis Asset Management Inc 877,800 1.41%
Jun 30, 2024 Oberweis Asset Management Inc 441,130 0.71%
Jun 30, 2024 Oberweis Asset Management Inc 877,800 1.42%
May 31, 2024 Oberweis Asset Management Inc 877,800 1.42%
Apr 30, 2024 Oberweis Asset Management Inc 786,800 1.27%
Mar 31, 2024 Oberweis Asset Management Inc 441,130 0.71%
Mar 31, 2024 Oberweis Asset Management Inc 786,800 1.29%
Feb 29, 2024 Oberweis Asset Management Inc 786,800 1.29%
Jan 31, 2024 Oberweis Asset Management Inc 683,600 1.13%
Dec 31, 2023 Oberweis Asset Management Inc 683,600 1.13%
Nov 30, 2023 Oberweis Asset Management Inc 627,400 1.04%
Oct 31, 2023 Oberweis Asset Management Inc 627,400 1.05%
Sep 30, 2023 Oberweis Asset Management Inc 341,800 0.56%
Sep 30, 2023 Oberweis Asset Management Inc 571,200 0.95%
Aug 31, 2023 Oberweis Asset Management Inc 431,200 0.72%
Jul 31, 2023 Oberweis Asset Management Inc 431,200 0.72%
Jun 30, 2023 Oberweis Asset Management Inc 285,600 0.48%
Jun 30, 2023 Oberweis Asset Management Inc 431,200 0.72%
May 31, 2023 Oberweis Asset Management Inc 0 0.00%
Mar 31, 2023 Oberweis Asset Management Inc 215,600 0.36%

View all ownership details of ACM Research Inc - Ordinary Shares - Class A