Quick answer
ALLIANT ENERGY CORP (LNT) disclosed a 2-for-1 stock split in SEC filings (first reported in a 10-Q filed 2016-05-05, period ending 2016-03-31).
Data as of 2016-05-05. Source: SEC EDGAR XBRL filings
| Period end | Split ratio | Form | Filed |
|---|---|---|---|
| 2016-03-31 | 2-for-1 | 10-Q | 2016-05-05 |
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Last updated 2026-10-16. Data only, not financial or tax advice.