---
schema_version: "secwatch.filing_event.v1"
accession: "0000097745-25-000095"
form_type: "8-K"
ticker: "TMO"
cik: "0000097745"
company_name: "THERMO FISHER SCIENTIFIC INC."
filed_at: "2025-07-23T23:59:59+00:00"
generated_at: "2026-05-18T04:04:00.722479+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Thermo Fisher CFO Stephen Williamson to retire March 2026; James Meyer named successor

## Summary
- CFO Stephen Williamson will retire effective March 31, 2026.
- James R. Meyer appointed as SVP and CFO, effective March 1, 2026.
- Meyer currently VP, Financial Operations, joined Thermo Fisher in 2009.
- Meyer previously worked at PricewaterhouseCoopers.
- Transition planned; Williamson supporting until retirement.

## SEC filing metadata
- accession: 0000097745-25-000095
- form_type: 8-K
- ticker: TMO
- cik: 0000097745
- company_name: THERMO FISHER SCIENTIFIC INC.
- filed_at: 2025-07-23T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/97745/000009774525000095/0000097745-25-000095-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/97745/000009774525000095/tmo-20250723.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000097745-25-000095
- JSON: https://secwatch.observer/filing/0000097745-25-000095.json
- Plain text: https://secwatch.observer/filing/0000097745-25-000095.txt

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