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v3.25.3

Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Revenues: |  |  |  |
Electric utility | $ 1,124 | $ 999 | $ 2,828 | $ 2,579
Gas utility | 51 | 49 | 366 | 322
Other utility | 12 | 12 | 37 | 36
Non-utility | 23 | 21 | 67 | 68
Total revenues | 1,210 | 1,081 | 3,298 | 3,005
Operating expenses: |  |  |  |
Electric production fuel and purchased power | 239 | 192 | 564 | 493
Electric transmission service | 166 | 165 | 474 | 464
Cost of gas sold | 12 | 13 | 180 | 152
Asset valuation charge for IPL's Lansing Generating Station | 0 | 0 | 0 | 60
Other operation and maintenance | 204 | 174 | 530 | 510
Depreciation and amortization | 211 | 195 | 631 | 571
Taxes other than income taxes | 29 | 29 | 91 | 90
Total operating expenses | 861 | 768 | 2,470 | 2,340
Operating income | 349 | 313 | 828 | 665
Other (income) and deductions: |  |  |  |
Interest expense | 128 | 114 | 372 | 329
Equity income from unconsolidated investments, net | (18) | (14) | (41) | (44)
Allowance for funds used during construction | (24) | (20) | (65) | (58)
Other | 0 | 0 | 3 | 2
Total other (income) and deductions | 86 | 80 | 269 | 229
Income before income taxes | 263 | 233 | 559 | 436
Income tax expense (benefit) | (18) | (62) | (109) | (104)
Net income attributable to common shareowners | $ 281 | $ 295 | $ 668 | $ 540
Weighted average number of common shares outstanding: |  |  |  |
Basic (in shares) | 257,000 | 256,600 | 256,900 | 256,400
Diluted (in shares) | 257,800 | 256,900 | 257,500 | 256,700
Earnings per weighted average common share attributable to Alliant Energy common shareowners: |  |  |  |
Basic (in dollars per share) | $ 1.09 | $ 1.15 | $ 2.60 | $ 2.11
Diluted (in dollars per share) | $ 1.09 | $ 1.15 | $ 2.59 | $ 2.10
IPL [Member] |  |  |  |
Revenues: |  |  |  |
Electric utility | $ 608 | $ 523 | $ 1,455 | $ 1,318
Gas utility | 27 | 27 | 185 | 175
Other utility | 12 | 11 | 36 | 34
Total revenues | 647 | 561 | 1,676 | 1,527
Operating expenses: |  |  |  |
Electric production fuel and purchased power | 106 | 79 | 213 | 195
Electric transmission service | 115 | 115 | 322 | 317
Cost of gas sold | 7 | 8 | 89 | 85
Asset valuation charge for IPL's Lansing Generating Station | 0 | 0 | 0 | 60
Other operation and maintenance | 108 | 96 | 275 | 281
Depreciation and amortization | 116 | 100 | 346 | 294
Taxes other than income taxes | 15 | 14 | 44 | 45
Total operating expenses | 467 | 412 | 1,289 | 1,277
Operating income | 180 | 149 | 387 | 250
Other (income) and deductions: |  |  |  |
Interest expense | 54 | 44 | 154 | 128
Allowance for funds used during construction | (15) | (13) | (37) | (34)
Other | (3) | (4) | (6) | (4)
Total other (income) and deductions | 36 | 27 | 111 | 90
Income before income taxes | 144 | 122 | 276 | 160
Income tax expense (benefit) | (21) | (68) | (98) | (112)
Net income attributable to common shareowners | 165 | 190 | 374 | 272
WPL [Member] |  |  |  |
Revenues: |  |  |  |
Electric utility | 516 | 476 | 1,373 | 1,261
Gas utility | 24 | 22 | 181 | 147
Other utility | 0 | 1 | 1 | 2
Total revenues | 540 | 499 | 1,555 | 1,410
Operating expenses: |  |  |  |
Electric production fuel and purchased power | 133 | 112 | 351 | 298
Electric transmission service | 51 | 49 | 152 | 148
Cost of gas sold | 5 | 5 | 91 | 67
Other operation and maintenance | 84 | 72 | 222 | 200
Depreciation and amortization | 92 | 91 | 275 | 269
Taxes other than income taxes | 13 | 14 | 42 | 41
Total operating expenses | 378 | 343 | 1,133 | 1,023
Operating income | 162 | 156 | 422 | 387
Other (income) and deductions: |  |  |  |
Interest expense | 43 | 42 | 129 | 124
Allowance for funds used during construction | (9) | (7) | (28) | (24)
Other | 4 | 3 | 9 | 4
Total other (income) and deductions | 38 | 38 | 110 | 104
Income before income taxes | 124 | 118 | 312 | 283
Income tax expense (benefit) | 1 | 4 | (9) | 13
Net income attributable to common shareowners | $ 123 | $ 114 | $ 321 | $ 270

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