DEBT AND FINANCING ARRANGEMENTS (Tables)

3 Months Ended

Mar. 31, 2024

Details on Long Term Debt

Details on long-term debt at March 31, 2024, March 31, 2023 and December 31, 2023 are shown below.

(millions)	March 31,				December 31,
	2024		2023		2023
Unitil Corporation:
3.70% Senior Notes, Due August 1, 2026	$	30.0	$	30.0	$	30.0
3.43% Senior Notes, Due December 18, 2029		30.0		30.0		30.0
Unitil Energy First Mortgage Bonds:
6.96% Senior Secured Notes, Due September 1, 2028		10.0		12.0		10.0
8.00% Senior Secured Notes, Due May 1, 2031		12.0		13.5		12.0
6.32% Senior Secured Notes, Due September 15, 2036		15.0		15.0		15.0
3.58% Senior Secured Notes, Due September 15, 2040		27.5		27.5		27.5
4.18% Senior Secured Notes, Due November 30, 2048		30.0		30.0		30.0
Fitchburg:
6.79% Senior Notes, Due October 15, 2025		—		2.0		—
3.52% Senior Notes, Due November 1, 2027		10.0		10.0		10.0
7.37% Senior Notes, Due January 15, 2029		6.0		7.2		7.2
5.90% Senior Notes, Due December 15, 2030		15.0		15.0		15.0
7.98% Senior Notes, Due June 1, 2031		14.0		14.0		14.0
5.70% Senior Notes, Due July 2, 2033		12.0		—		12.0
3.78% Senior Notes, Due September 15, 2040		27.5		27.5		27.5
4.32% Senior Notes, Due November 1, 2047		15.0		15.0		15.0
5.96% Senior Notes, Due July 2, 2053		13.0		—		13.0
Northern Utilities:
3.52% Senior Notes, Due November 1, 2027		20.0		20.0		20.0
7.72% Senior Notes, Due December 3, 2038		50.0		50.0		50.0
3.78% Senior Notes, Due September 15, 2040		40.0		40.0		40.0
4.42% Senior Notes, Due October 15, 2044		50.0		50.0		50.0
4.32% Senior Notes, Due November 1, 2047		30.0		30.0		30.0
4.04% Senior Notes, Due September 12, 2049		40.0		40.0		40.0
Granite State:
3.72% Senior Notes, Due November 1, 2027		15.0		15.0		15.0
Unitil Realty Corp.:
2.64% Senior Secured Notes, Due December 18, 2030		4.0		4.2		4.0
Total Long-Term Debt		516.0		497.9		517.2
Less: Unamortized Debt Issuance Costs		3.2		3.2		3.2
Total Long-Term Debt, net of Unamortized Debt Issuance    Costs		512.8		494.7		514.0
Less: Current Portion		4.9		6.7		4.9
Total Long-term Debt, Less Current Portion	$	507.9	$	488.0	$	509.1

Fair Value of Long Term Debt

(millions)	March 31,				December 31,
	2024		2023		2023
Estimated Fair Value of Long-Term Debt	$	465.6	$	449.2	$	470.5

Borrowing Limits Amounts Outstanding and Amounts Available under Credit Facility

The following table details the borrowing limits, amounts outstanding and amounts available under the Credit Facility as of March 31, 2024, March 31, 2023 and December 31, 2023:

	Revolving Credit Facility (millions)
	March 31,				December 31,
	2024		2023		2023
Limit	$	200.0	$	200.0	$	200.0
Short-Term Borrowings Outstanding		169.9		140.2		162.0
Available	$	30.1	$	59.8	$	38.0

Classification of the Company Lease Obligations

The balance sheet classification of the Company’s lease obligations was as follows:

	March 31,				December 31,
Lease Obligations (millions)	2024		2023		2023
Operating Lease Obligations:
Other Current Liabilities (current portion)	$	1.8	$	1.8	$	1.9
Other Noncurrent Liabilities (long-term portion)		3.8		3.9		3.7
Total Operating Lease Obligations		5.6		5.7		5.6
Capital Lease Obligations:
Other Current Liabilities (current portion)		0.1		0.1		0.1
Other Noncurrent Liabilities (long-term portion)		0.3		0.3		0.4
Total Capital Lease Obligations		0.4		0.4		0.5
Total Lease Obligations	$	6.0	$	6.1	$	6.1

Future Operating Lease Payment Obligations and Future Minimum Lease Payments under Capital Leases

The following table is a schedule of future operating lease payment obligations and future minimum lease payments under capital leases as of March 31, 2024. The payments for operating leases consist of $1.8 million of current operating lease obligations, which are included in Other Current Liabilities and $3.8 million of noncurrent operating lease obligations, which are included in Other Noncurrent Liabilities, on the Company’s Consolidated Balance Sheets as of March 31, 2024. The payments for capital leases consist of $0.1 million of current capital lease obligations, which are included in Other Current Liabilities and $0.3 million of noncurrent capital lease obligations, which are included in Other Noncurrent Liabilities, on the Company’s Consolidated Balance Sheets as of March 31, 2024.

Lease Payments ($000’s)	Operating		Capital
Year Ending December 31,	Leases		Leases
Rest of 2024	$	1,607	$	122
2025		1,558		120
2026		1,270		107
2027		993		115
2028		420		19
2029 - 2033		223		—
Total Payments		6,071		483
Less: Interest		517		40
Amount of Lease Obligations Recorded on Consolidated    Balance Sheets	$	5,554	$	443