---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-26-021661"
form_type: "8-K"
ticker: "ACMR"
cik: "0001680062"
company_name: "ACM Research, Inc."
filed_at: "2026-05-15T20:16:17+00:00"
generated_at: "2026-05-15T21:12:14.028627+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# ACM Research closes $150M registered direct offering of 2.88M shares at $52

## Summary
- Closed offering of 2,884,615 Class A common shares at $52.00 per share on May 15, 2026.
- Net proceeds of approximately $149.85 million after estimated expenses.
- Offering previously disclosed on May 12, 2026, under a shelf registration statement.

## SEC filing metadata
- accession: 0001140361-26-021661
- form_type: 8-K
- ticker: ACMR
- cik: 0001680062
- company_name: ACM Research, Inc.
- filed_at: 2026-05-15T20:16:17+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680062/000114036126021661/0001140361-26-021661-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680062/000114036126021661/ef20073887_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-26-021661
- JSON: https://secwatch.observer/filing/0001140361-26-021661.json
- Plain text: https://secwatch.observer/filing/0001140361-26-021661.txt

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