---
schema_version: "secwatch.filing_event.v1"
accession: "0001733998-25-000191"
form_type: "8-K"
ticker: "NWN"
cik: "0001733998"
company_name: "Northwest Natural Holding Co"
filed_at: "2025-12-16T23:59:59+00:00"
generated_at: "2026-05-16T13:04:40.706798+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# NW Natural issues $200M in first mortgage bonds across two tranches

## Summary
- $75M of 5.13% Series due 2036, $125M of 5.90% Series due 2055 issued Dec 16, 2025.
- Bonds sold to institutional investors via private placement under Section 4(a)(2).
- 5.13% bonds mature May 1, 2036; 5.90% bonds mature Dec 1, 2055.
- Both series callable at make-whole premium before Feb 1, 2036 (5.13%) or June 1, 2055 (5.90%).
- Issued under existing mortgage indenture with Deutsche Bank as trustee.

## SEC filing metadata
- accession: 0001733998-25-000191
- form_type: 8-K
- ticker: NWN
- cik: 0001733998
- company_name: Northwest Natural Holding Co
- filed_at: 2025-12-16T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1733998/000173399825000191/0001733998-25-000191-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/73020/000173399825000191/nwn-20251216.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001733998-25-000191
- JSON: https://secwatch.observer/filing/0001733998-25-000191.json
- Plain text: https://secwatch.observer/filing/0001733998-25-000191.txt

## Key facts
- Debt Financings
  Northwest Natural Holding Co incurred senior notes of $125,000,000 aggregate principal amount of its First Mortgage Bonds, 5.90% Series due 2055 with Deutsche Bank Trust Company Americas at 5.90% per annum maturing December 1, 2055.
  - Instrument: senior notes
  - Principal: $125,000,000 aggregate principal amount of its First Mortgage Bonds, 5.90% Series due 2055
  - Counterparty: Deutsche Bank Trust Company Americas
  - Rate: 5.90% per annum
  - Maturity: December 1, 2055
  - Event: incurrence
  source text: On December 16, 2025, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company, issued and sold (i) $75,000,000 aggregate principal amount of its First Mortgage Bonds, 5.13% Series due 2036 (the 5.13% Bonds), and (ii) $125,000,000 aggregate principal amount of its First Mortgage Bonds, 5.90% Series due 2055 (the 5.90% Bonds, together with the 5.13% Bonds, the Bonds), to certain institutional investors pursuant to a Bond Purchase Agreement dated December 16, 2025, in reliance on an exemption from registration under Section 4(a)(2) of the Securities Act of 1933, as amended.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1733998/000173399825000191/0001733998-25-000191-index.htm
- Debt Financings
  Northwest Natural Holding Co incurred senior notes of $75,000,000 aggregate principal amount of its First Mortgage Bonds, 5.13% Series due 2036 with Deutsche Bank Trust Company Americas at 5.13% per annum maturing May 1, 2036.
  - Instrument: senior notes
  - Principal: $75,000,000 aggregate principal amount of its First Mortgage Bonds, 5.13% Series due 2036
  - Counterparty: Deutsche Bank Trust Company Americas
  - Rate: 5.13% per annum
  - Maturity: May 1, 2036
  - Event: incurrence
  source text: On December 16, 2025, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company, issued and sold (i) $75,000,000 aggregate principal amount of its First Mortgage Bonds, 5.13% Series due 2036 (the 5.13% Bonds), and (ii) $125,000,000 aggregate principal amount of its First Mortgage Bonds, 5.90% Series due 2055 (the 5.90% Bonds, together with the 5.13% Bonds, the Bonds), to certain institutional investors pursuant to a Bond Purchase Agreement dated December 16, 2025, in reliance on an exemption from registration under Section 4(a)(2) of the Securities Act of 1933, as amended.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1733998/000173399825000191/0001733998-25-000191-index.htm

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