NORTHWEST NATURAL HOLDING COMPANY Auditor
The independent registered public accounting firm that signed the audit report in each annual report on Form 10-K, newest first. PCAOB firm ID and the internal-control attestation are as tagged on the cover from fiscal 2021; earlier rows come from the signed report text.
- 2026-02-27: Fiscal year end 2025-12-31; Auditor PricewaterhouseCoopers LLP; PCAOB firm ID 238; Location Portland, Oregon.
- 2025-02-28: Fiscal year end 2024-12-31; Auditor PricewaterhouseCoopers LLP; PCAOB firm ID 238; Location Portland, Oregon.
- 2024-02-23: Fiscal year end 2023-12-31; Auditor PricewaterhouseCoopers LLP; PCAOB firm ID 238; Location Portland, Oregon.
| Filed | Fiscal year end | Auditor | PCAOB firm ID | Location | Internal-control attestation |
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| 2026-02-27 | 2025-12-31 | PricewaterhouseCoopers LLP | 238 | Portland, Oregon | Yes |
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| 2025-02-28 | 2024-12-31 | PricewaterhouseCoopers LLP | 238 | Portland, Oregon | Yes |
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| 2024-02-23 | 2023-12-31 | PricewaterhouseCoopers LLP | 238 | Portland, Oregon | Yes |
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