Position in ACMR
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$1,649,570
+$1,138,020 QoQ
Shares Held
13,000
0.0% QoQ
Ownership
0.019%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
#167
of 374 holders
Holding Since
Mar 2020
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ACMR Over Time
Shares Held
Position Value (USD)
Position in Semiconductor Equipment & Materials
Technology · as of Jun 30, 2026OBERWEIS ASSET MANAGEMENT INC/ holds $244,009,282 across 6 Semiconductor Equipment & Materials names. ACMR ranks #6 (0.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | UCTT |
Ultra Clean Holdings, Inc.
|
647,276 | $92,295,084 | |
| 2 | NVMI |
Nova Ltd.
|
108,675 | $59,004,004 | |
| 3 | CAMT |
Camtek Ltd
|
253,380 | $41,331,345 | |
| 4 | AMBA |
Ambarella Inc
|
342,254 | $29,365,393 | |
| 5 | FORM |
Formfactor Inc
|
127,330 | $20,363,886 | |
| 6 | ACMR |
ACM Research, Inc.
This page
|
13,000 | $1,649,570 |
All Filings in ACMR
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17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,649,570 | 13,000 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $511,550 | 13,000 | Shares | Sole | 2026-05-15 | |
| 2025-06-30 | $6,396,264 | 246,960 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $6,930,766 | 296,948 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $7,326,520 | 485,200 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $8,454,950 | 416,500 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $10,172,457 | 441,130 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $12,854,528 | 441,130 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $7,687,036 | 393,400 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $6,188,289 | 341,800 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $3,735,648 | 285,600 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $2,522,520 | 215,600 | Shares | Sole | 2023-05-15 | |
| 2022-03-31 | $1,324,160 | 64,000 | Shares | Sole | 2022-05-16 | |
| 2021-03-31 | $484,740 | 6,000 | Shares | Sole | 2021-05-17 | |
| 2020-09-30 | $713,110 | 10,320 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $2,170,131 | 34,800 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $740,250 | 25,000 | Shares | Sole | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||