---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-23-000085"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2023-12-29T23:59:59+00:00"
generated_at: "2026-06-07T05:57:21.543824+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# NW Natural files $154.9M Oregon rate increase request; new rates target Nov 2024

## Summary
- Requested annual revenue increase of $154.9M based on 10.1% ROE, 50% equity capital structure, and $2.14B average rate base.
- Rate base increase of $381M vs. last case for distribution system reinforcement, IT/cybersecurity upgrades, and gas storage investments.
- Oregon PUC review expected to take up to 10 months; new rates effective November 1, 2024, if approved.
- Filing addresses inflation, updated depreciation study, and long-planned capital investments by NW Natural.

## SEC filing metadata
- accession: 0001733998-23-000085
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2023-12-29T23:59:59+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/1733998/000173399823000085/0001733998-23-000085-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/73020/000173399823000085/nwn-20231229.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-23-000085
- JSON: https://secwatch.observer/filing/0001733998-23-000085.json
- Plain text: https://secwatch.observer/filing/0001733998-23-000085.txt

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