TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 098975 Notice Type: Rates and Charges Subject: MARKET AREA SUMMER 2026 FUEL/UAF ESTIMATE Critical: N Post Date/Time: 11/26/2025 08:00 AM Notice Status: Initiate For Gas Day(s): 11/25/2025 - 01/31/2026 Notice Effective Date/Time: 11/26/2025 08:00 AM Notice End Date/Time: 01/31/2026 05:00 PM Required Response Indicator Description: 5-No response required Notice Text: For customers' benefit in planning future Market Area summer season transportation, Northern estimates that the combined April through October 2026 Market Area fuel use and unaccounted for (UAF) percentages will be 1.23%. The Market Area summer fuel use percentage is projected to be 0.90% based on actual data through October 31, 2025. The actual UAF percentage will be based upon calendar year 2025 data and will be included in a January 30, 2026, tariff filing with an effective date of April 1, 2026.