DUK · 8-K · 20260804PR000037

Market Demand Trends

Duke Energy CORP · 2026-08-04 · Importance 25 · Surprise 32

Total consolidated electric sales increased 0.4% year over year to 129,896 GWh for the six months ended June 30, 2026, while retail sales increased 0.4% to 107,098 GWh. Duke Energy Progress reported the strongest consolidated sales growth among the larger electric utilities at 1.4%, whereas Duke Energy Indiana declined 5.5% and Duke Energy Florida increased 1.3%. Duke Energy Ohio wholesale and other sales increased 154.3% to 628 GWh, while Duke Energy Indiana wholesale and other sales declined 31.0% to 1,686 GWh. Electric customer counts increased 1.4% overall to 8.7 million, led by 1.7% growth in Duke Energy Carolinas customers and 1.6% growth in both Duke Energy Progress and Duke Energy Florida.

Key facts

• Duke Energy Indiana three months purchased power and net interchange for June 2026: 3,180 GWh, down 22.0% versus 2025. source
• Piedmont Natural Gas LDC total average number of gas customers for Three Months Ended June 30, 2026: 1,000,069, down 16.7% versus 2025. source
• Duke Energy Progress three months purchased power and net interchange for June 2026: 3,257 GWh, up 18.0% versus 2025. source
• Total Consolidated Electric Sales – Electric Utilities and Infrastructure for Three Months Ended June 30, 2026: 64,442 GWh, up 0.4% versus 2025. source
• Total Retail Sales for Electric Utilities and Infrastructure for Three Months Ended June 30, 2026: 53,429 GWh, up 0.3% versus 2025. source
• Duke Energy Carolinas three months residential GWh sales for June 2026: 6,400 GWh, up 3.8% versus 2025. source
• Total retail customers for Electric Utilities and Infrastructure average for Three Months Ended June 30, 2026: 8,727,792, up 1.4% versus 2025. source
• Duke Energy Ohio three months purchased power and net interchange for June 2026: 5,525 GWh, down 1.4% versus 2025. source