---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-25-009270"
form_type: "8-K"
ticker: "ACMR"
cik: "0001680062"
company_name: "ACM Research, Inc."
filed_at: "2025-03-18T23:59:59+00:00"
generated_at: "2026-05-24T13:55:41.727260+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# ACM Research appoints Charlie Pappis to Board of Directors, effective March 15, 2025

## Summary
- Charlie Pappis, a semiconductor industry veteran with 40+ years of experience, appointed to board.
- Board size increases to five members with the addition of Pappis.
- Pappis received an option to purchase 10,000 shares at $29.18, vesting before 2025 annual meeting.
- He previously held executive leadership roles at a major U.S. semiconductor equipment company.
- Appointment effective March 15, 2025; press release issued March 18, 2025.

## SEC filing metadata
- accession: 0001140361-25-009270
- form_type: 8-K
- ticker: ACMR
- cik: 0001680062
- company_name: ACM Research, Inc.
- filed_at: 2025-03-18T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680062/000114036125009270/0001140361-25-009270-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680062/000114036125009270/ef20045712_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-25-009270
- JSON: https://secwatch.observer/filing/0001140361-25-009270.json
- Plain text: https://secwatch.observer/filing/0001140361-25-009270.txt

## Key facts
- Executive change
  Charles Pappis was appointed as member of the Board and its Audit Committee at ACM Research, Inc..
  - Action: appointed
  - Role: member of the Board and its Audit Committee
  source text: The Board of Directors (the “Board”) of ACM Research, Inc. (the “Company”) has appointed Charles Pappis to serve as a member of the Board and its Audit Committee, effective March 15, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1680062/000114036125009270/0001140361-25-009270-index.htm

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