Northwest Natural Holding Co SEC filings NWN
Northwest Natural Holding Co has 651 filings in SEC EDGAR's recent list, going back to Mar 9, 2018. Its latest annual report, Form ARS, was filed on Apr 17, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 5, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| S-8 | Employee stock plan registration | Feb 27, 2026 | — |
| 424B5 | Prospectus supplement | Mar 14, 2025 | — |
| FWP | Free writing prospectus | Mar 12, 2025 | — |
| 424B3 | Prospectus | Mar 12, 2025 | — |
| 424B5 | Prospectus supplement | Aug 9, 2024 | — |
| S-3ASR | Automatic shelf registration | Aug 9, 2024 | — |
| S-8 | Employee stock plan registration | Nov 6, 2023 | — |
| S-8 | Employee stock plan registration | Nov 6, 2023 | — |
| S-8 | Employee stock plan registration | Aug 4, 2022 | — |
| 424B2 | Prospectus | Mar 30, 2022 | — |
| 424B5 | Prospectus supplement | Mar 29, 2022 | — |
| S-8 POS | Filing | Dec 21, 2021 | — |
| 424B5 | Prospectus supplement | Aug 13, 2021 | — |
| S-3ASR | Automatic shelf registration | Aug 13, 2021 | — |
| S-8 | Employee stock plan registration | Nov 6, 2019 | — |
| 424B2 | Prospectus | Jun 5, 2019 | — |
| 424B5 | Prospectus supplement | Jun 4, 2019 | — |
| S-8 | Employee stock plan registration | Oct 3, 2018 | — |
| S-8 POS | Filing | Oct 3, 2018 | — |
| S-8 POS | Filing | Oct 3, 2018 | — |
| S-8 POS | Filing | Oct 3, 2018 | — |
| S-8 POS | Filing | Oct 3, 2018 | — |
| S-8 POS | Filing | Oct 3, 2018 | — |
| S-8 POS | Filing | Oct 3, 2018 | — |
| S-3ASR | Automatic shelf registration | Oct 2, 2018 | — |
| 424B3 | Prospectus | Apr 18, 2018 | — |
| S-4 | Registration for a merger or exchange | Mar 9, 2018 | — |
Showing 27 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Natural Gas Distribution (SIC 4924)
- Listed as
- NWN (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- OR
- Headquarters
- Portland, OR
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1733998
Other Natural Gas Distribution companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.