Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0002100121-26-000871
Filing Date
2026-07-31
Accepted
2026-07-31 10:57:44
Documents
1
X0202

Document Format Files

Seq Description Document Type Size
1 primary_doc.html SCHEDULE 13G  
1 primary_doc.xml SCHEDULE 13G 5631
  Complete submission text file 0002100121-26-000871.txt   7310
Mailing Address 42307 OSGOOD ROAD, SUITE I FREMONT CA 94539
Business Address 42307 OSGOOD ROAD, SUITE I FREMONT CA 94539 510-445-3700
ACM Research, Inc. (Subject) CIK: 0001680062 (see all company filings)

EIN.: 000000000 | State of Incorp.: CA | Fiscal Year End: 1231
Type: SCHEDULE 13G | Act: 34 | File No.: 005-91511 | Film No.: 261226392
SIC: 3559 Special Industry Machinery, NEC
(CF Office: 06 Technology)

Mailing Address 100 VANGUARD BLVD MALVERN PA 19355
Business Address 100 VANGUARD BLVD MALVERN PA 19355 610-669-6148
VANGUARD PORTFOLIO MANAGEMENT LLC (Filed by) CIK: 0002100121 (see all company filings)

EIN.: 392888838 | State of Incorp.: PA | Fiscal Year End: 1231
LEI: 529900YN99W7NU4H6B84
Type: SCHEDULE 13G