Docket No:  ADV 1764 Docket Name:  NW NATURAL ADVICE NO. 25-11 CORPORATE ACTIVITY TAX Submit Public Comment Subject Company:  NORTHWEST NATURAL              See also:  UG 524    NW Natural Advice No. 25-11, Updates to Schedule 177, Oregon Corporate Activity Tax. Copies served to Gas List. Filing Date:   Advice No: 25-11       Effective:  10/31/2025 Expiration:   Status:   Case Manager:  CHARLES LOCKWOOD Phone:  503-559-7752 Email:   charles.lockwood@puc.oregon.gov Email Service List (semi-colon delimited)      Email Service List (comma delimited)   If you experience problems with the above 'Email Service List' links, please try one of these: Service List Popup (semi-colon delimited)     Service List Popup (comma delimited) General information about Tariff Filings.

ACTIONS SERVICE LIST SCHEDULE Public Comments Date/Time Event Description 10/31/2025 EFFECTIVE DATE/ STATUTORY DEADLINE