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OBERWEIS ASSET MANAGEMENT INC
> ACMR
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | ACM Research, Inc. | ACMR | 285,600 | 70,000 | 3,735,648,000 | 1,213,128,000 | $13,080.00 |
| 03/31/2023 | ACM Research, Inc. | ACMR | 215,600 | 215,600 | 2,522,520,000 | 2,522,520,000 | $11,700.00 |
| 06/30/2022 | ACM Research, Inc. | ACMR | 0 | -64,000 | 0 | -1,324,000 | |
| 03/31/2022 | ACM Research, Inc. | ACMR | 64,000 | 64,000 | 1,324,000 | 1,324,000 | $20.69 |
| 06/30/2021 | ACM Research, Inc. | ACMR | 0 | -6,000 | 0 | -485,000 | |
| 03/31/2021 | ACM Research, Inc. | ACMR | 6,000 | 6,000 | 485,000 | 485,000 | $80.83 |
| 12/31/2020 | ACM Research, Inc. | ACMR | 0 | -10,320 | 0 | -713,000 | |
| 09/30/2020 | ACM Research, Inc. | ACMR | 10,320 | -24,480 | 713,000 | -1,457,000 | $69.09 |
| 06/30/2020 | ACM Research, Inc. | ACMR | 34,800 | 9,800 | 2,170,000 | 1,430,000 | $62.36 |
| 03/31/2020 | ACM Research, Inc. | ACMR | 25,000 | 25,000 | 740,000 | 740,000 | $29.60 |
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