ACM Research, Inc. 8-K

What Happened

• ACM Research, Inc. (ACMR) filed a Form 8-K on February 4, 2026 to disclose that its operating subsidiary, ACM Research (Shanghai), Inc. (“ACM Shanghai”), submitted a Record of January 2026 Investor Relations Activity to the Shanghai Stock Exchange (SSE).
• The SSE posted that Record on January 29, 2026. A copy of the Record is included in the filing as Exhibit 99.1. The filing states the information is furnished (not “filed”) and is not subject to Section 18 liability or incorporated by reference into other securities filings.

Key Details

• Company: ACM Research, Inc.; Subsidiary: ACM Research (Shanghai), Inc. (listed on the SSE STAR Market).
• SSE posting date: January 29, 2026.
• Form 8-K filing date / signature: February 4, 2026; signed by Mark McKechnie, CFO and Treasurer.
• Exhibit included: Exhibit 99.1 — Record of January 2026 Investor Relations Activity (unofficial English translation of original Mandarin document).

Why It Matters

• This 8-K informs investors that ACM Shanghai completed and published a routine investor relations report on the STAR Market, which can contain management outreach, investor Q&A, and disclosure of investor communications important for market transparency.
• The filing is procedural and furnishes the Record for investor access; it does not report financial results, management changes, or transactions. Investors should review the attached Exhibit 99.1 on the company’s SEC filing or the SSE site for any substantive investor-relations content.