---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-003715"
form_type: "8-K"
ticker: "UCTT"
cik: "0001275014"
company_name: "Ultra Clean Holdings, Inc."
filed_at: "2026-01-28T23:59:59+00:00"
generated_at: "2026-05-16T06:54:19.413508+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Ultra Clean Holdings terminates COO Bajwa, appoints Robert Wunar as COO

## Summary
- COO Harjinder Bajwa's employment terminated effective Jan 25, 2026; severance per company policy.
- Robert Wunar appointed COO effective March 23, 2026; previously Managing Director at Applied Materials.
- Wunar's annual salary $475,000; target bonus 85% of base; equity award $1.5M (half RSU, half PSU) subject to shareholder approval.
- Sign-on bonus $200,000 subject to clawback if Wunar resigns or is fired for cause within 12 months.

## SEC filing metadata
- accession: 0001628280-26-003715
- form_type: 8-K
- ticker: UCTT
- cik: 0001275014
- company_name: Ultra Clean Holdings, Inc.
- filed_at: 2026-01-28T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1275014/000162828026003715/0001628280-26-003715-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1275014/000162828026003715/uctt-20260125.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-003715
- JSON: https://secwatch.observer/filing/0001628280-26-003715.json
- Plain text: https://secwatch.observer/filing/0001628280-26-003715.txt

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