---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-25-037501"
form_type: "8-K"
ticker: "TMO"
cik: "0000097745"
company_name: "THERMO FISHER SCIENTIFIC INC."
filed_at: "2025-10-07T23:59:59+00:00"
generated_at: "2026-05-17T04:32:13.933511+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Thermo Fisher issues $2.5B senior notes in four tranches due 2031–2037

## Summary
- Issued $500M 4.200% notes due 2031, $750M 4.473% notes due 2032, $750M 4.794% notes due 2035, and $500M 4.894% notes due 2037.
- Net proceeds expected to be ~$2.48B after underwriting discounts and expenses.
- Proceeds will be used for general corporate purposes including potential acquisitions, debt repayment, working capital, or share repurchases.
- Notes are unsecured and rank equally with existing unsecured unsubordinated debt; redeemable at par after respective par call dates.
- Underwriting agreement signed September 30, 2025 with J.P. Morgan, ING, Mizuho, Scotia Capital as representatives.

## SEC filing metadata
- accession: 0001140361-25-037501
- form_type: 8-K
- ticker: TMO
- cik: 0000097745
- company_name: THERMO FISHER SCIENTIFIC INC.
- filed_at: 2025-10-07T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/97745/000114036125037501/0001140361-25-037501-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/97745/000114036125037501/ef20056709_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-25-037501
- JSON: https://secwatch.observer/filing/0001140361-25-037501.json
- Plain text: https://secwatch.observer/filing/0001140361-25-037501.txt

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