---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-057283"
form_type: "8-K"
ticker: "UCTT"
cik: "0001275014"
company_name: "Ultra Clean Holdings, Inc."
filed_at: "2023-11-01T23:59:59+00:00"
generated_at: "2026-06-09T02:04:42.556547+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Ultra Clean COO Vijayan Chinnasami to depart effective December 31, 2023

## Summary
- Vijayan Chinnasami, Chief Operating Officer, will leave Ultra Clean Holdings on December 31, 2023.
- Decision made on October 30, 2023; no successor named in the filing.
- Chinnasami's departure is effective at year-end 2023.

## SEC filing metadata
- accession: 0000950170-23-057283
- form_type: 8-K
- ticker: UCTT
- cik: 0001275014
- company_name: Ultra Clean Holdings, Inc.
- filed_at: 2023-11-01T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1275014/000095017023057283/0000950170-23-057283-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1275014/000095017023057283/uctt-20231030.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-057283
- JSON: https://secwatch.observer/filing/0000950170-23-057283.json
- Plain text: https://secwatch.observer/filing/0000950170-23-057283.txt

## Key facts
- Executive change
  Vijayan Chinnasami departed as Chief Operating Officer at Ultra Clean Holdings, Inc..
  - Action: leaving
  - Role: Chief Operating Officer
  source text: On October 30, 2023, it was decided that Vijayan Chinnasami, the Chief Operating Officer of Ultra Clean Holdings, Inc. (the “Company”), will be leaving the Company effective December 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1275014/000095017023057283/0000950170-23-057283-index.htm

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