Ameren Corporation filings document a Missouri-incorporated utility holding company with NYSE-listed common stock and rate-regulated utility subsidiaries, including Ameren Missouri, Ameren Illinois and co-registrants such as Union Electric Company and Ameren Illinois Company. The record covers consolidated operating results, unaudited financial statements, earnings guidance, utility infrastructure investment and the electric and natural gas service activities of Ameren Missouri and Ameren Illinois.
SEC disclosures also cover capital structure and financing activity, including senior note offerings under shelf registration statements, as well as proxy matters, shareholder voting, board composition, committee assignments, director compensation and governance policies. Form 8-K filings report material events, financial exhibits and co-registrant disclosures for the company's regulated utility subsidiaries.
Ameren Corp insider Gwendolyn G. Mizell reported a Form 4 showing 943 shares of common stock were disposed of at $113.28 per share to satisfy tax withholding from vesting stock awards. After this tax-withholding disposition, she directly owns 6,324 shares and indirectly holds 2,424 share equivalents through the Ameren Savings Investment Plan as of February 28, 2026.
Ameren Corp executive Shawn E. Schukar reported multiple stock transactions. He sold 4,975 shares of Ameren common stock in an open-market sale at $111.84 per share pursuant to a Rule 10b5-1 trading plan, leaving him with 56,830 directly held shares.
On February 27, 2026, 3,148 shares were disposed of at $113.28 per share to cover tax withholding obligations tied to vesting performance share units and restricted stock units. As of February 28, 2026, he also held an estimated 3,153 share equivalents indirectly through the Ameren Corporation Savings Investment Plan.
Ameren Corp senior vice president reports routine share withholding for taxes. On the vesting of performance share units and restricted stock units, 726 shares of common stock were withheld by the company at a price of $113.28 per share to cover tax obligations. After this tax-withholding disposition, Ryan J. Martin directly holds 27,779 Ameren common shares and has an additional estimated 1,789 share equivalents held indirectly through the Ameren Corporation Savings Investment Plan as of February 28, 2026.
AMEREN CORP senior vice president Eric V. Seidler reported a tax-related share disposition. On February 27, he had 982 common shares withheld by the issuer at $113.28 per share to cover tax obligations from vested performance and restricted stock units. After this, he directly owned 14,041 common shares, plus an estimated 1,793 share equivalents held indirectly through the Ameren Corporation Savings Investment Plan as of February 28, 2026.
Ameren Corp executive Mark C. Lindgren reported multiple stock transactions involving Ameren common stock. On March 3, 2026, he completed an open-market sale of 2,073 shares at $111.84 per share, conducted under a Rule 10b5-1 trading plan. Following this sale, his direct holdings stood at 44,983 shares.
On February 27, 2026, 2,054 shares were withheld by Ameren to satisfy tax obligations tied to vesting of performance share units and restricted stock units, a tax-withholding disposition rather than an open-market trade. As of February 28, 2026, he also held an estimated 1,733 share equivalents indirectly through the Ameren Corporation Savings Investment Plan 401(k) unitized stock fund.
Ameren Corp executive Leonard P. Singh reported a tax-related share disposition. On February 27, he had 5,478 shares of Ameren common stock withheld by the issuer at $113.28 per share to cover tax obligations from vesting performance share units and restricted stock units. After this tax-withholding disposition, he directly held 32,776 shares of Ameren common stock and indirectly held an estimated 94 share equivalents through the Ameren Corporation Savings Investment Plan as of February 28, 2026.
Ameren Corp executive Patrick E. Smith reported a tax-related share disposition. On February 27, 2026, 910 shares of Ameren common stock at $113.28 per share were withheld by the issuer to cover tax obligations from vesting performance share and restricted stock units.
After this tax-withholding disposition, Smith directly owned 19,910 shares of Ameren common stock. He also indirectly held an estimated 3,047 share equivalents through the Ameren Savings Investment Plan and 948 shares through his spouse as of late February 2026.
Ameren Corp director Timothy S. Rausch has filed an initial insider ownership report showing no beneficial ownership of company securities. The Form 3 indicates that he is a director of Ameren Corp and reports holding 0 shares directly following the reported date.
This filing is a baseline disclosure required when an individual becomes a reporting insider. It does not show any share purchases or sales and simply records that, as of the reported date, he has no beneficially owned Ameren Corp securities.
$400,000,000 5.00% Senior Notes due 2036 are being issued by Ameren Corporation. The notes pay interest at 5.00% semi‑annually on May 15 and November 15, with first interest payable on November 15, 2026.
Proceeds (approximately $395.7 million) will be used for general corporate purposes, including repayment of a portion of short‑term debt and commercial paper. The notes are unsecured, rank equally with Ameren’s other senior debt and may be redeemed under specified formulas or at 101% following a defined Tax Credit Event.