ACM Research, Inc. 8-K

What Happened
ACM Research, Inc. announced via Form 8-K that its operating subsidiary, ACM Research (Shanghai), Inc. (“ACM Shanghai”), which is listed on the Shanghai Stock Exchange’s Sci‑Tech Innovation Board (STAR Market), filed a Record of March 2026 Investor Relations Activity with the SSE. The Shanghai Stock Exchange posted that Record on March 13, 2026. ACM Research attached an unofficial English translation of the Record as Exhibit 99.1. The company notes this information is being furnished (not “filed”) under SEC rules. The Form 8‑K was signed by CFO Mark McKechnie on March 19, 2026.

Key Details

• Subsidiary: ACM Research (Shanghai), Inc., listed on the SSE STAR Market.
• Event posted by SSE: Record of March 2026 Investor Relations Activity — posted March 13, 2026.
• Filing on U.S. side: Form 8‑K filed March 19, 2026; Exhibit 99.1 is an unofficial English translation of the original Mandarin document.
• Legal note: Information is furnished (not filed) under the Securities Exchange Act and not incorporated by reference into other filings.

Why It Matters
This is a routine investor‑relations disclosure from ACM Research’s China‑listed operating unit, confirming regulatory filing and public posting of investor communications on the STAR Market. For retail investors, it signals ongoing compliance and disclosure activity by the company’s Shanghai subsidiary but does not contain earnings, financial results, or management changes.