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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Operating revenues | $ 4,702,755 | $ 4,165,187 | $ 4,275,357
Purchased gas cost | 1,066,054 | 933,693 | 1,452,173
Operation and maintenance expense | 902,942 | 819,137 | 764,906
Depreciation and amortization expense | 734,745 | 669,972 | 604,327
Taxes, other than income | 439,043 | 387,023 | 386,804
Operating income | 1,559,971 | 1,355,362 | 1,067,147
Other non-operating income | 89,741 | 71,046 | 69,775
Interest charges | 171,678 | 190,632 | 137,281
Income before income taxes | 1,478,034 | 1,235,776 | 999,641
Income tax expense | 279,280 | 192,881 | 113,779
Net income | $ 1,198,754 | $ 1,042,895 | $ 885,862
Basic net income per share (USD per share) | $ 7.54 | $ 6.83 | $ 6.10
Diluted net income per share (USD per share) | $ 7.46 | $ 6.83 | $ 6.10
Weighted average shares outstanding: |  |  |
Basic (in shares) | 158,943 | 152,508 | 145,121
Diluted (in shares) | 160,573 | 152,666 | 145,166
Other comprehensive income (loss), net of tax |  |  |
Net unrealized holding gains (losses) on available-for-sale securities, net of tax of $(3), $168 and $37 | $ (4) | $ 582 | $ 126
Cash flow hedges: |  |  |
Amortization and unrealized gains (losses) on interest rate agreements, net of tax of $1,103, $(15,432) and $43,148 | 9,304 | (53,395) | 149,290
Total other comprehensive income (loss) | 9,300 | (52,813) | 149,416
Total comprehensive income | 1,208,054 | 990,082 | 1,035,278
Distribution segment |  |  |
Operating revenues | 4,422,355 | 3,912,134 | 4,096,661
Depreciation and amortization expense | 543,840 | 491,982 | 434,721
Interest charges | 99,226 | 117,086 | 77,185
Income tax expense | 150,961 | 96,041 | 60,032
Net income | 746,781 | 671,413 | 580,397
Pipeline and storage segment |  |  |
Operating revenues | 280,400 | 253,053 | 178,696
Depreciation and amortization expense | 190,905 | 177,990 | 169,606
Interest charges | 72,452 | 73,546 | 60,096
Income tax expense | 128,319 | 96,840 | 53,747
Net income | 451,973 | 371,482 | 305,465
Operating Segments |  |  |
Operating revenues | 5,490,697 | 4,853,170 | 4,884,864
Operating Segments | Distribution segment |  |  |
Operating revenues | 4,425,397 | 3,915,141 | 4,099,690
Purchased gas cost | 1,854,323 | 1,620,515 | 2,061,920
Operating Segments | Pipeline and storage segment |  |  |
Operating revenues | 1,065,300 | 938,029 | 785,174
Purchased gas cost | (1,346) | 146 | (1,220)
Intersegment eliminations |  |  |
Operating revenues | (787,942) | (687,983) | (609,507)
Purchased gas cost | (786,923) | (686,968) | (608,527)
Intersegment eliminations | Distribution segment |  |  |
Operating revenues | (3,042) | (3,007) | (3,029)
Intersegment eliminations | Pipeline and storage segment |  |  |
Operating revenues | $ (784,900) | $ (684,976) | $ (606,478)

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