---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-355564"
form_type: "8-K"
ticker: "NI"
cik: "0001111711"
company_name: "NISOURCE INC."
filed_at: "2026-08-18T20:30:09+00:00"
generated_at: "2026-08-18T20:31:15.603331+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# NiSource issues $750M 6.250% junior subordinated notes due 2057

## Summary
- Closed $750M offering of 6.250% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2057 on Aug 18, 2026.
- Notes pay 6.250% until Apr 15, 2032, then reset to 5-yr UST + 1.930% spread, with 6.250% floor.
- Maturity Apr 15, 2057; interest payable semi-annually Apr 15 and Oct 15, starting Apr 15, 2027.
- Proceeds for general corporate purposes, including capex, working capital, and repaying existing debt.
- Company may defer interest up to 20 consecutive periods; restrictions on dividends and share repurchases during deferral.

## SEC filing metadata
- accession: 0001193125-26-355564
- form_type: 8-K
- ticker: NI
- cik: 0001111711
- company_name: NISOURCE INC.
- filed_at: 2026-08-18T20:30:09+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1111711/000119312526355564/0001193125-26-355564-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1111711/000119312526355564/d108198d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-355564
- JSON: https://secwatch.observer/filing/0001193125-26-355564.json
- Plain text: https://secwatch.observer/filing/0001193125-26-355564.txt

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