---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-25-000004"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2025-01-08T23:59:59+00:00"
generated_at: "2026-05-28T06:54:55.149551+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 completes acquisition of SiEnergy for $271.1M cash + $156.1M debt

## Summary
- Acquired SiEnergy Operating, LLC for ~$271.1M cash plus assumption of ~$156.1M debt; closed Jan 7, 2025.
- SiEnergy serves ~70,000 customers in Houston, Dallas, Austin; rate base ~$247M with 26% CAGR growth over 5 years.
- Financed with $273M bridge loan from JPMorgan; plans to issue junior subordinated notes in H1 2025 for permanent financing.
- SiEnergy achieved 22% compounded customer growth over 5 years, making it one of the fastest-growing gas utilities.
- CEO David Anderson: acquisition expands NWN's Texas presence and positions for continued organic growth.

## SEC filing metadata
- accession: 0001733998-25-000004
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2025-01-08T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.03, 8.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1733998/000173399825000004/0001733998-25-000004-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1733998/000173399825000004/nwn-20250107.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-25-000004
- JSON: https://secwatch.observer/filing/0001733998-25-000004.json
- Plain text: https://secwatch.observer/filing/0001733998-25-000004.txt

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