Quick Answer
ALLIANT ENERGY CORP reported Shares Outstanding of 257.14 million shares for fiscal year 2025.
ALLIANT ENERGY CORP Shares Outstanding — Annual History
| Fiscal Year | Shares Outstanding | YoY Change |
|---|---|---|
| 2025 | 257.14M | +0.2% |
| 2024 | 256.69M | +0.2% |
| 2023 | 256.10M | +2.0% |
| 2022 | 251.13M | +0.3% |
| 2021 | 250.47M | +0.2% |
| 2020 | 249.87M | +2.0% |
| 2019 | 245.02M | +3.8% |
| 2018 | 236.06M | +2.0% |
| 2017 | 231.35M | +1.6% |
| 2016 | 227.67M | +0.3% |
| 2015 | 226.92M | +2.3% |
| 2014 | 221.87M | -0.0% |
| 2013 | 221.89M | +99.9% |
| 2012 | 110.99M | -0.0% |
| 2011 | 111.02M | +0.1% |
| 2010 | 110.89M | +0.2% |
| 2009 | 110.66M | +0.2% |
| 2008 | 110.45M | — |
Quarterly Shares Outstanding
| Quarter Ending | Shares Outstanding | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | 257.05M | +0.2% | +0.0% |
| June 30, 2025 | 256.97M | +0.2% | +0.0% |
| March 31, 2025 | 256.88M | +0.2% | +0.1% |
| December 31, 2024 | 256.69M | +0.2% | +0.0% |
| September 30, 2024 | 256.60M | +0.6% | +0.0% |
| June 30, 2024 | 256.50M | +1.5% | +0.0% |
| March 31, 2024 | 256.38M | +2.0% | +0.1% |
| December 31, 2023 | 256.10M | +2.0% | +0.4% |
- ALLIANT ENERGY CORP showed an increase of +0.2% in Shares Outstanding compared to the prior fiscal year.
- Over the 2008–2025 period, ALLIANT ENERGY CORP’s shares outstanding has grown by 132.8% (from 110.45 million shares to 257.14 million shares).
- The most recent figure is from ALLIANT ENERGY CORP’s fiscal year 2025 report (Form 10-K), filed with the SEC on February 20, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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