---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-24-000128"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2024-11-18T23:59:59+00:00"
generated_at: "2026-05-29T23:09:18.170244+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# NW Natural Holdings to acquire SiEnergy for $273M cash + $152M debt

## Summary
- Total consideration ~$425M; expected close Q1 2025, subject to HSR review.
- SiEnergy serves ~70k customers in TX Triangle; contracted backlog >180k.
- NWN raises regulated utility rate base growth target to 6%-8% (from 5%-7%).
- Acquisition funded with junior subordinated notes; no common equity issuance.
- Reaffirms FY2024 EPS guidance: $1.94-$2.14 GAAP; $2.20-$2.40 adjusted.

## SEC filing metadata
- accession: 0001733998-24-000128
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2024-11-18T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1733998/000173399824000128/0001733998-24-000128-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1733998/000173399824000128/nwn-20241117.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-24-000128
- JSON: https://secwatch.observer/filing/0001733998-24-000128.json
- Plain text: https://secwatch.observer/filing/0001733998-24-000128.txt

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