CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
ASSETS
Property, plant and equipment	$ 28,028,820	$ 24,784,285
Construction in progress	1,235,316	1,063,798
Total property, plant and equipment and construction in progress	29,264,136	25,848,083
Less accumulated depreciation and amortization	3,971,146	3,643,716
Net property, plant and equipment	25,292,990	22,204,367
Current assets
Cash and cash equivalents	202,687	307,340
Restricted cash and cash equivalents	1,116	1,516
Cash and cash equivalents and restricted cash and cash equivalents	203,803	308,856
Accounts receivable, less allowance for uncollectible accounts of $45,259 in 2025 and $37,056 in 2024	375,509	365,882
Gas stored underground	171,756	169,508
Other current assets	301,627	288,068
Total current assets	1,052,695	1,132,314
Securitized intangible asset, less accumulated amortization of $18,473 in 2025 and $10,756 in 2024 (See Note 10)	75,127	82,844
Goodwill	731,257	731,257
Deferred charges and other assets	1,097,453	1,043,683
Total assets	28,249,522	25,194,465
Shareholders’ equity
Common stock, no par value (stated at $0.005 per share); 200,000,000 shares authorized; issued and outstanding: 2025 — 161,568,384 shares; 2024 — 155,258,845 shares	808	776
Additional paid-in capital	8,221,455	7,474,559
Accumulated other comprehensive income	475,015	465,715
Retained earnings	4,861,612	4,216,619
Shareholders’ equity	13,558,890	12,157,669
Long-term debt	8,907,169	7,783,646
Securitized long-term debt (See Note 10)	68,236	76,871
Total capitalization	22,534,295	20,018,186
Commitments and contingencies (See Note 14)
Current liabilities
Accounts payable and accrued liabilities	506,516	445,397
Other current liabilities	835,557	750,620
Current maturities of long-term debt	11,775	1,651
Current maturities of securitized long-term debt (See Note 10)	8,767	8,207
Total current liabilities	1,362,615	1,205,875
Deferred income taxes	2,918,347	2,593,342
Regulatory excess deferred taxes (See Note 15)	117,482	177,315
Regulatory cost of removal obligation	532,461	507,815
Deferred credits and other liabilities	784,322	691,932
Total shareholders' equity and liabilities	$ 28,249,522	$ 25,194,465