Borrowings and Other Financing Instruments (Tables)

9 Months Ended

Sep. 30, 2026

As of Sept. 30, 2026, NSP-Wisconsin had the following committed revolving credit facility available (in millions of dollars):

(a)Expires in December 2029.

(b)Includes outstanding commercial paper.

Money pool borrowings:


(Amounts in Millions, Except Interest Rates)	Three Months Ended Sept. 30, 2026		Year Ended Dec. 31, 2025
Borrowing limit	$	150	$	150
Amount outstanding at period end	—		8
Average amount outstanding	—		2
Maximum amount outstanding	—		42
Weighted average interest rate, computed on a daily basis	N/A		4.25		%
Weighted average interest rate at period end	N/A		3.88

Commercial paper outstanding:


(Amounts in Millions, Except Interest Rates)	Three Months Ended Sept. 30, 2026		Year Ended Dec. 31, 2025
Borrowing limit	$	150	$	150
Amount outstanding at period end	—		—
Average amount outstanding	—		3
Maximum amount outstanding	—		50
Weighted average interest rate, computed on a daily basis	N/A		4.57		%
Weighted average interest rate at period end	N/A		N/A