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OBERWEIS ASSET MANAGEMENT INC/

Position in ACMR — ACM Research, Inc.

CIK 937886 LISLE, IL

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, 2026

OBERWEIS 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
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
2026-06-30 $1,649,570 13,000
2026-03-31 $511,550 13,000
2025-06-30 $6,396,264 246,960
2025-03-31 $6,930,766 296,948
2024-12-31 $7,326,520 485,200
2024-09-30 $8,454,950 416,500
2024-06-30 $10,172,457 441,130
2024-03-31 $12,854,528 441,130
2023-12-31 $7,687,036 393,400
2023-09-30 $6,188,289 341,800
2023-06-30 $3,735,648 285,600
2023-03-31 $2,522,520 215,600
2022-03-31 $1,324,160 64,000
2021-03-31 $484,740 6,000
2020-09-30 $713,110 10,320
2020-06-30 $2,170,131 34,800
2020-03-31 $740,250 25,000