---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-24-000143"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2024-12-30T23:59:59+00:00"
generated_at: "2026-05-28T22:48:37.614072+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# NW Natural files $59.4M Oregon rate case; extends credit facilities to 2027

## Summary
- NW Natural subsidiary filed Oregon rate case requesting $59.4M annual revenue increase (~5.79% above current rates).
- Filing assumes 52% equity, 10.4% ROE, 7.658% cost of capital, average rate base of $2.29B.
- $204M rate base increase driven by distribution system upgrades, IT/cybersecurity, and Mist gas storage investments.
- OPUC review expected up to 10 months; new rates targeted to take effect November 1, 2025.
- NW Holdings $200M and NW Natural $400M credit facilities extended to November 2027 from November 2026.

## SEC filing metadata
- accession: 0001733998-24-000143
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2024-12-30T23:59:59+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1733998/000173399824000143/0001733998-24-000143-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/73020/000173399824000143/nwn-20241230.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-24-000143
- JSON: https://secwatch.observer/filing/0001733998-24-000143.json
- Plain text: https://secwatch.observer/filing/0001733998-24-000143.txt

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