---
schema_version: "secwatch.filing_event.v1"
accession: "0000022606-26-000017"
form_type: "8-K"
ticker: null
cik: "0000022606"
company_name: "COMMONWEALTH EDISON Co"
filed_at: "2026-05-14T16:10:37+00:00"
generated_at: "2026-05-14T16:13:11.676349+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# ComEd issues $1.425B in first mortgage bonds, refinances $500M of existing debt

## Summary
- $600M of 4.550% Series 139 bonds due 2031 and $825M of 5.850% Series 140 bonds due 2056 issued May 14, 2026.
- Proceeds used to redeem $500M of 2.550% Series 120 bonds due June 15, 2026, plus general corporate purposes.
- Bonds are secured by a first mortgage on ComEd's utility plant; interest payable semi-annually beginning Dec 1, 2026.
- Underwriters include BofA Securities, Citigroup, Loop Capital, RBC Capital, U.S. Bancorp Investments.
- Bonds are redeemable at ComEd's option at make-whole or par pricing subject to defined par call dates.

## SEC filing metadata
- accession: 0000022606-26-000017
- form_type: 8-K
- cik: 0000022606
- company_name: COMMONWEALTH EDISON Co
- filed_at: 2026-05-14T16:10:37+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/22606/000002260626000017/0000022606-26-000017-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/22606/000002260626000017/exc-20260514.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000022606-26-000017
- JSON: https://secwatch.observer/filing/0000022606-26-000017.json
- Plain text: https://secwatch.observer/filing/0000022606-26-000017.txt

## Key facts
- Debt Financings
  COMMONWEALTH EDISON Co incurred senior notes of $600 million aggregate principal amount of its First Mortgage 4.550% Bonds, Series 139, due June 1, 2031, and $825 milli with BofA Securities, Inc., Citigroup Global Markets Inc., Loop Capital Markets LLC, RBC Capital Markets, LLC and U.S. Bancorp Investments, Inc. at 4.550% per annum (Series 139) and 5.850% per annum (Series 140) maturing June 1, 2031 (Series 139) and June 1, 2056 (Series 140).
  - Instrument: senior notes
  - Principal: $600 million aggregate principal amount of its First Mortgage 4.550% Bonds, Series 139, due June 1, 2031, and $825 milli
  - Counterparty: BofA Securities, Inc., Citigroup Global Markets Inc., Loop Capital Markets LLC, RBC Capital Markets, LLC and U.S. Bancorp Investments, Inc.
  - Rate: 4.550% per annum (Series 139) and 5.850% per annum (Series 140)
  - Maturity: June 1, 2031 (Series 139) and June 1, 2056 (Series 140)
  - Event: incurrence
  source text: On May 14, 2026, ComEd issued $600 million aggregate principal amount of its First Mortgage 4.550% Bonds, Series 139, due June 1, 2031, and $825 million aggregate principal amount of its First Mortgage 5.850% Bonds, Series 140, due June 1, 2056.
  evidence_url: https://www.sec.gov/Archives/edgar/data/22606/000002260626000017/0000022606-26-000017-index.htm

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