---
schema_version: "secwatch.filing_event.v1"
accession: "0001680062-26-000009"
form_type: "8-K"
ticker: "ACMR"
cik: "0001680062"
company_name: "ACM Research, Inc."
filed_at: "2026-01-30T23:59:59+00:00"
generated_at: "2026-05-16T05:59:41.870282+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# ACM Research to sell 4.8M shares of ACM Shanghai (1% stake) via inquiry-based transfer

## Summary
- ACM Research intends to sell 4,801,648 shares of ACM Shanghai (1.34% of its ownership; 1% of total shares) via SSE inquiry-based transfer for general corporate purposes.
- Floor price set at no less than 70% of the 20-day average trading price of ACM Shanghai shares through the date of the subscription invitation.
- Transferees must be qualified institutional investors; shares acquired are subject to a 6-month lock-up.
- The transfer does not change control of ACM Shanghai; ACMR US remains controlling shareholder.

## SEC filing metadata
- accession: 0001680062-26-000009
- form_type: 8-K
- ticker: ACMR
- cik: 0001680062
- company_name: ACM Research, Inc.
- filed_at: 2026-01-30T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680062/000168006226000009/0001680062-26-000009-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680062/000168006226000009/acmr-20260130.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001680062-26-000009
- JSON: https://secwatch.observer/filing/0001680062-26-000009.json
- Plain text: https://secwatch.observer/filing/0001680062-26-000009.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.