ACM Research Files STAR Market Investor Relations Record for ACM Shanghai

What Happened
ACM Research, Inc. (ACMR) reported under Item 8.01 that its operating subsidiary, ACM Research (Shanghai), Inc. (“ACM Shanghai”), filed a Record of August 2026 Investor Relations Activity with the Shanghai Stock Exchange’s Sci‑Tech Innovation Board (STAR Market). The SSE posted that record on August 17, 2026. A copy of the Record is attached to the 8‑K as Exhibit 99.1 (unofficial English translation). The company noted this information is furnished (not “filed”) under the Securities Exchange Act.

Key Details

• Subsidiary: ACM Research (Shanghai), Inc. — shares listed on the STAR Market of the Shanghai Stock Exchange.
• SSE posting date: August 17, 2026 (Record of August 2026 Investor Relations Activity).
• Filing: ACMR filed the Form 8‑K on August 27, 2026 and attached Exhibit 99.1 (unofficial English translation).
• Legal note: Information is furnished, not filed, and therefore not subject to Section 18 liability or incorporated by reference into ACMR securities filings.

Why It Matters
This filing shows ACMR’s Shanghai‑listed unit is meeting SSE investor‑relations reporting requirements and provides an official channel for investor communications about the subsidiary. For retail investors, it signals ongoing transparency and regulatory compliance for ACM Shanghai on the STAR Market; however, the 8‑K does not include financial results or operational metrics. Investors tracking ACMR should review the attached Record (Exhibit 99.1) on the SSE or in the filing for any substantive investor‑relations disclosures.