---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-25-000172"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2025-10-28T23:59:59+00:00"
generated_at: "2026-05-17T01:57:50.459010+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# OPUC approves NW Natural rate case with $20.7M revenue increase, effective Oct 31

## Summary
- Final order on Oct 24 approves stipulations; revenue increase of $20.7M over existing rates.
- Original request was $59.4M; stipulation set $21.3M; final adjusted down for capital projects.
- Average rate base $2.27B, up $180.1M since last case; new rates effective Oct 31, 2025.
- Approved ROE of 9.5%, capital structure 50% equity/50% debt, overall cost of capital 7.12%.
- OPUC rejected proposals by CUB and Coalition; resolves regulatory litigation.

## SEC filing metadata
- accession: 0001733998-25-000172
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2025-10-28T23:59:59+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1733998/000173399825000172/0001733998-25-000172-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/73020/000173399825000172/nwn-20251024.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-25-000172
- JSON: https://secwatch.observer/filing/0001733998-25-000172.json
- Plain text: https://secwatch.observer/filing/0001733998-25-000172.txt

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