| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Saathoff MardiLyn | Gen'l Counsel, CCO & SVP, Reg | 250 SW TAYLOR ST, PORTLAND | Molly J. Wilcox, Attorney-in-Fact | 23 Dec 2025 | 0001445672 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NWN | Common Stock | Sale | $15.78 | -0 | -0% | $46.90 | 28,459 | 22 Dec 2025 | Direct | F1 |
| transaction | NWN | Common Stock | Sale | $36.91 | -1 | -0% | $46.90 | 28,458 | 22 Dec 2025 | Direct | F1 |
| holding | NWN | Common Stock | 16,004 | 22 Dec 2025 | See Footnote | F2 | |||||
| holding | NWN | Common Stock | 663 | 22 Dec 2025 | See Footnote | F3 |
| Id | Content |
|---|---|
| F1 | Disposition was due to the sale of fractional shares in connection with the transfer of whole shares between accounts directly held by the reporting person. |
| F2 | Shares have been credited to the reporting person?s account under Northwest Natural Gas Company?s Deferred Compensation Plan for Directors and Executives. |
| F3 | Shares held in reporting persons account under Northwest Natural Gas Company's Retirement K Savings Plan as of December 19, 2025. Shares held in Ms. Saathoff's Retirement K Savings Plan Account were inadvertently omitted from previous Form 4 filings. |