---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-23-056365"
form_type: "8-K"
ticker: "TMO"
cik: "0000097745"
company_name: "THERMO FISHER SCIENTIFIC INC."
filed_at: "2023-12-05T23:59:59+00:00"
generated_at: "2026-06-07T18:30:35.157118+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Thermo Fisher issues $2.5B in senior notes; net proceeds ~$2.48B for general corporate purposes

## Summary
- Issued $1B of 5.000% notes due 2026, $1B of 5.000% notes due 2029, and $500M of 5.200% notes due 2034.
- Net proceeds of approximately $2.48B after underwriting discounts and expenses.
- Proceeds may be used for acquisitions, debt repayment, working capital, capital expenditures, or share repurchases.
- Notes are unsecured senior obligations ranking equally with existing unsecured debt.

## SEC filing metadata
- accession: 0001140361-23-056365
- form_type: 8-K
- ticker: TMO
- cik: 0000097745
- company_name: THERMO FISHER SCIENTIFIC INC.
- filed_at: 2023-12-05T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/97745/000114036123056365/0001140361-23-056365-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/97745/000114036123056365/ny20015413x4_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-23-056365
- JSON: https://secwatch.observer/filing/0001140361-23-056365.json
- Plain text: https://secwatch.observer/filing/0001140361-23-056365.txt

## Key facts
- Material Agreements
  THERMO FISHER SCIENTIFIC INC. entered into Indenture with The Bank of New York Mellon Trust Company, N.A. (effective 2023-12-05).
  - Action: entry
  - Agreement: notes offering
  - Counterparty: The Bank of New York Mellon Trust Company, N.A.
  - Effective: 2023-12-05
  source text: The Notes were issued under an indenture, dated as of November 20, 2009 (the “Base Indenture”), and the Twenty-Eighth Supplemental Indenture, dated as of December 5, 2023 (the “Supplemental Indenture” and, together with the Base Indenture, the “Indenture”), between the Company, as issuer, and The Bank of New York Mellon Trust Company, N.A., as trustee.
  evidence_url: https://www.sec.gov/Archives/edgar/data/97745/000114036123056365/0001140361-23-056365-index.htm
- Material Agreements
  THERMO FISHER SCIENTIFIC INC. entered into Twenty-Eighth Supplemental Indenture with The Bank of New York Mellon Trust Company, N.A. valued at $1,000,000,000 aggregate principal amount of 5.000% Senior Notes due 2026, $1,000,000,000 aggregate (effective 2023-12-05).
  - Action: entry
  - Agreement: notes offering
  - Counterparty: The Bank of New York Mellon Trust Company, N.A.
  - Value: $1,000,000,000 aggregate principal amount of 5.000% Senior Notes due 2026, $1,000,000,000 aggregate
  - Effective: 2023-12-05
  source text: On December 5, 2023, Thermo Fisher Scientific Inc. (the “Company”) issued $1,000,000,000 aggregate principal amount of 5.000% Senior Notes due 2026 (the “2026 Notes”), $1,000,000,000 aggregate principal amount of 5.000% Senior Notes due 2029 (the “2029 Notes”) and $500,000,000 aggregate principal amount of 5.200% Senior Notes due 2034 (the “2034 Notes” and, collectively with the 2026 Notes and the 2029 Notes, the “Notes”) in a public offering (the “Offering”) pursuant to a registration statement on Form S-3 (File No. 333-263034) and a preliminary prospectus supplement and prospectus supplement related to the offering of the Notes, each as previously filed with the Securities and Exchange Commission.
  evidence_url: https://www.sec.gov/Archives/edgar/data/97745/000114036123056365/0001140361-23-056365-index.htm

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