ALLIANT ENERGY CORP
For the period ended Jun 30, 2025. Filed Aug 8, 2025.
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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Jun 30, 2025 · Filed Aug 8, 2025
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2. Regulatory Matters
NOTE 2. REGULATORY MATTERS
Regulatory Assets and Regulatory Liabilities -
Regulatory assets were comprised of the following items (in millions):
| Alliant Energy | IPL | WPL | ||||
|---|---|---|---|---|---|---|
| June 30,2025 | December 31,2024 | June 30,2025 | December 31,2024 | June 30,2025 | December 31,2024 | |
| Tax-related | $1,030 | $989 | $897 | $870 | $133 | $119 |
| AROs | 427 | 401 | 296 | 281 | 131 | 120 |
| Pension and OPEB costs | 306 | 315 | 153 | 157 | 153 | 158 |
| Assets retired early | 167 | 180 | 157 | 168 | 10 | 12 |
| Derivatives | 57 | 60 | 14 | 15 | 43 | 45 |
| Non-service pension and OPEB costs | 54 | 51 | 20 | 19 | 34 | 32 |
| Commodity cost recovery | 49 | 68 | 10 | 2 | 39 | 66 |
| WPL’s Western Wisconsin gas distribution expansion investments | 40 | 42 | — | — | 40 | 42 |
| Other | 157 | 168 | 68 | 74 | 89 | 94 |
| $2,287 | $2,274 | $1,615 | $1,586 | $672 | $688 | |
Assets retired early -IPL’s retail electric rate review for the October 2024 through September 2025 forward-looking Test Period filed with the IUC in October 2023 included a request for continued recovery of and a return on the remaining net book value of IPL’s Lansing Generating Station through 2037. In June 2024, IPL reached a partial non-unanimous settlement agreement with certain stakeholders, which the IUC subsequently approved in September 2024. The agreement included a return of the remaining net book value of Lansing, but did not include a return on the remaining net book value of Lansing. As a result, the return on the remaining net book value is no longer probable of recovery from IPL’s retail electric customers and in the second quarter of 2024, a pre-tax non-cash charge of $60 million was recorded to “Asset valuation charge for IPL’s Lansing Generating Station” in Alliant Energy’s and IPL’s income statements.
Regulatory liabilities were comprised of the following items (in millions):
| Alliant Energy | IPL | WPL | ||||
|---|---|---|---|---|---|---|
| June 30,2025 | December 31,2024 | June 30,2025 | December 31,2024 | June 30,2025 | December 31,2024 | |
| Tax-related | $611 | $582 | $275 | $286 | $336 | $296 |
| Cost of removal obligations | 349 | 347 | 206 | 205 | 143 | 142 |
| Derivatives | 60 | 53 | 32 | 29 | 28 | 24 |
| Other | 68 | 46 | 30 | 26 | 38 | 20 |
| $1,088 | $1,028 | $543 | $546 | $545 | $482 | |
Tax-related -The increase in Alliant Energy’s and WPL’s tax-related regulatory liabilities was primarily due to tax benefits resulting from WPL electing investment tax credit treatment for certain energy storage facilities in 2025.
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.