---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-25-000144"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2025-09-02T23:59:59+00:00"
generated_at: "2026-05-17T08:54:20.719859+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# NW Natural files multi-year Washington rate increase request totaling $42.5M over three years

## Summary
- Filed general rate increase with WUTC on Aug 29, 2025; covers ~98,000 customers (12% of total).
- Year 1 revenue increase request: $25.6M (Aug 2026); Year 2: $8.6M; Year 3: $8.3M.
- Assumes 51% common equity, ROE of 10.1% (Y1) to 10.2% (Y3), and rate base of $341.8M-$422.7M.
- New rates expected Aug 1, 2026 after up to 11-month regulatory review.

## SEC filing metadata
- accession: 0001733998-25-000144
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2025-09-02T23:59:59+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/1733998/000173399825000144/0001733998-25-000144-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/73020/000173399825000144/nwn-20250829.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-25-000144
- JSON: https://secwatch.observer/filing/0001733998-25-000144.json
- Plain text: https://secwatch.observer/filing/0001733998-25-000144.txt

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