---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-187297"
form_type: "8-K"
ticker: "COHR"
cik: "0000820318"
company_name: "COHERENT CORP."
filed_at: "2026-04-28T23:59:59+00:00"
generated_at: "2026-05-15T03:28:31.334175+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Coherent CSO Giovanni Barbarossa transitions to Special Advisor, retiring Sep 2026

## Summary
- Giovanni Barbarossa stepped down as Chief Strategy Officer effective April 27, 2026.
- He will serve as Special Advisor to the CEO until his retirement in September 2026.
- Transition is a planned departure; no immediate replacement announced.

## SEC filing metadata
- accession: 0001193125-26-187297
- form_type: 8-K
- ticker: COHR
- cik: 0000820318
- company_name: COHERENT CORP.
- filed_at: 2026-04-28T23:59:59+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/820318/000119312526187297/0001193125-26-187297-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/820318/000119312526187297/d107137d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-187297
- JSON: https://secwatch.observer/filing/0001193125-26-187297.json
- Plain text: https://secwatch.observer/filing/0001193125-26-187297.txt

## Key facts
- Executive change
  Giovanni Barbarossa changed role as Chief Strategy Officer at COHERENT CORP..
  - Action: transitioned from
  - Role: Chief Strategy Officer
  source text: Giovanni Barbarossa notified Coherent Corp. (the “Company”) of his intention to transition from his role as the Company’s Chief Strategy Officer, effective as of the Transition Date, and retire in September 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/820318/000119312526187297/0001193125-26-187297-index.htm

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