Alliant Energy Corp. director Patrick E. Allen reported a change in his beneficial ownership tied to Alliant Energy common stock on July 10, 2026. The reported security was a derivative holding described as units that will be settled in shares of Alliant Energy common stock when Allen’s service as a director ends. The filing indicates that the change involved adjustments for accrued dividends under a dividend reinvestment transaction. Such dividend-related adjustments were noted as exempt from Section 16 reporting liability under Rule 16a-11. In practical terms, Allen’s director equity units appear to have increased or been adjusted because dividends credited on the units were reinvested, rather than because of an open-market purchase or sale. No sale price, purchase price, option exercise price, expiration date, or open-market transaction details were provided in the text. The filing also does not disclose, in the supplied document excerpt, the exact number of derivative units acquired or the total number of derivative securities beneficially owned after the transaction. The notes clarify, however, that the units ultimately convert into Alliant Energy common shares upon Allen’s termination of service as a director. The report was signed on Allen’s behalf by Jake C. Blavat, attorney-in-fact, on July 14, 2026. The action matters mainly as an insider ownership update: it reflects dividend reinvestment accruals on director-held equity units rather than a discretionary insider trade in Alliant Energy stock.