---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-26-000145"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2026-09-22T23:28:48+00:00"
generated_at: "2026-09-23T10:05:59.396544+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# SiEnergy reaches Texas rate case settlement for $8.6M revenue increase

## Summary
- Settlement filed with Texas RRC on Sept 22; provides $8.6M annual revenue increase vs $12.0M requested.
- Capital structure set at 59.75% equity / 40.25% debt; ROE 9.8%; overall cost of capital 8.0%.
- Combined rate base $343M, up $177M since 2023; consolidation of SiEnergy Gas, Pines Gas, Pines Development.
- If approved, new rates expected November 2026; GRIP interim adjustment factors established.
- RRC approval still required; order may approve, modify, or deny the stipulation.

## SEC filing metadata
- accession: 0001733998-26-000145
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2026-09-22T23:28:48+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1733998/000173399826000145/0001733998-26-000145-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1733998/000173399826000145/nwn-20260922.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-26-000145
- JSON: https://secwatch.observer/filing/0001733998-26-000145.json
- Plain text: https://secwatch.observer/filing/0001733998-26-000145.txt

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