Docket No:  UG 524 Docket Name:  NW NATURAL ADVICE NO. 25-21 PURCHASE GAS ADJUSTMENT (PGA) Submit Public Comment Subject Company:  NORTHWEST NATURAL     In the Matter of NORTHWEST NATURAL GAS COMPANY, dba NW NATURAL, Annual Purchased Gas Cost and Technical Rate Adjustments. Filed by Kyle Walker. Copies served to Gas List. HC, CONF, and NONC Native Excel Files saved to agency folder. Filing Date:   Advice No: 25-21       Effective:  10/31/2025 Expiration:   Status:   Case Manager:  ANNA KIM Phone:  971-239-2887 Email:   anna.kim@puc.oregon.gov Staff Contact:  ZHUOYI ZHAO Phone:   Email:   zhuoyi.zhao@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