Ameren Form 4 Filings

AMEREN CORP executive Theresa A. Shaw, SVP and CATO, reported selling 325 shares of common stock on August 14, 2026 at $108.93 per share in an open-market or private transaction pursuant to a Rule 10b5-1 trading plan. After this sale, she directly held 32,340 shares, which include 47 dividend equivalents accrued under restricted stock units. She also indirectly held 928 share equivalents through a unitized stock fund in the Ameren Corporation Savings Investment Plan as of July 31, 2026.

Ameren Corp Group President, Utilities Michael L. Moehn sold 6,500 shares of common stock on August 3, 2026 at $108.96 per share in an open-market transaction under a Rule 10b5-1 trading plan. After this sale, he directly holds 199,689 shares, including 590 dividend equivalents credited on restricted stock units, and indirectly holds an estimated 5,304 share equivalents through the Ameren Corporation Savings Investment Plan’s unitized stock fund as of July 31, 2026.

Smith Patrick E reported acquisition or exercise transactions in this Form 4 filing.

Ameren Corp executive Patrick E. Smith reported a stock award and updated holdings. He received a grant of 280 shares of Ameren common stock at no cost, bringing his direct ownership to 20,275 shares. He also reported indirect holdings of 968 shares held by his spouse and 3,113 share equivalents in a 401(k) plan.

Footnotes explain that part of his position consists of restricted stock units granted under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest with a payment date in 2029, no later than March 15, 2029. The filing also notes 84 dividend equivalents accrued on these units during the first half of 2026.

AMEREN CORP executive Aaron P. Melda, Chairman & President of a subsidiary, reported an acquisition of 2,520 shares of common stock at a price of $0.00 per share as a grant or award. These restricted stock units were granted under Ameren's 2022 Omnibus Incentive Compensation Plan and are scheduled to vest on a payment date in 2029, which will be no later than March 15, 2029, subject to the plan and award terms. Following this grant and related accrued dividend equivalents, Melda’s directly reported holdings increased to 6,251 shares, while an estimated 4 share equivalents are held indirectly in a unitized stock fund within the Ameren Corporation Savings Investment Plan.

Arora Ajay K reported acquisition or exercise transactions in this Form 4 filing.

Ameren Corp executive Ajay K. Arora reported a stock award and updated share holdings. On July 1, 2026, he received a grant of 716 shares of common stock, recorded at $0.00 per share, classified as a grant or award under Ameren’s 2022 Omnibus Incentive Compensation Plan.

Following this award, Arora directly holds 23,119 common shares, which include 2 shares and 76 dividend equivalents added during the second quarter of 2026 through dividend reinvestment on prior restricted stock unit grants. He also has indirect holdings of 21,037 share equivalents through a family trust and 1,756 share equivalents through a 401(k) unitized stock fund.

Ameren Corp executive Ajay K. Arora reported an equity award rather than an open‑market trade. He received 6,797 shares of common stock at a reported price of $0.00 per share, described in a footnote as performance-based restricted stock units granted under Ameren’s 2022 Omnibus Incentive Compensation Plan. These units represent the minimum number of shares that will be delivered if vesting conditions are met and are scheduled to vest on a payment date occurring after June 1, 2031 and no later than July 15, 2031, subject to the plan and award terms.

Following this grant, Arora directly holds 22,326 Ameren shares. He also has indirect holdings, including 21,037 shares held by a family trust and an estimated 1,745 share equivalents in a unitized stock fund within the Ameren Corporation Savings Investment Plan as of May 29, 2026. The filing notes that his direct holdings include 2 shares acquired through reinvested dividends and 28 accrued dividend equivalents during the first quarter of 2026.

Melda Aaron P reported acquisition or exercise transactions in this Form 4 filing.

AMEREN CORP Chairman and President P. Melda Aaron received an equity grant of 3,705 restricted stock units of common stock. The grant was made at a stated price of $0.00 per share as compensation, not an open-market purchase.

The restricted stock units were granted under Ameren’s 2022 Omnibus Incentive Compensation Plan and will vest in two equal installments on March 1, 2027 and March 1, 2028, subject to the plan and the applicable award agreement. Following this grant, Aaron directly holds 3,705 shares or units reported in this filing.

Ameren Corp senior vice president Theresa A. Shaw reported open-market sales of 1,825 shares of common stock. She sold 1,500 shares at $109.35 per share and 325 shares at $109.08 per share under a Rule 10b5-1 trading plan, and now holds 32,618 shares directly plus 922 share equivalents through a 401(k) plan.

Ameren Corporation Group President, Utilities Michael L. Moehn reported an open-market sale of 6,500 shares of Ameren common stock at $113.63 per share. The sale was executed on May 1, 2026 pursuant to a Rule 10b5-1 trading plan previously adopted by Moehn.

After this transaction, Moehn directly holds 205,598 shares of Ameren common stock. He also has an indirect interest in an estimated 5,268 share equivalents through the Ameren Corporation Savings Investment Plan as of April 30, 2026, plus 573 accrued dividend equivalents tied to restricted stock units.

Ameren Corp senior vice president of finance Ryan J. Martin sold common stock in an open-market transaction. On March 4, 2026, he sold 1,300 shares of Ameren common stock at an average price of $113.31 per share. After this sale, he directly owned 26,479 shares. He also held an estimated 1,789 share equivalents indirectly through a 401(k) unitized stock fund as of February 28, 2026.

Ameren Corp director Catherine S. Brune reported a bona fide gift of 450 shares of common stock. The gift transfer occurred on March 5, 2026, and she now directly owns 26,628 shares of Ameren common stock following the transaction.

Ameren Corp director Timothy S. Rausch received a stock award of 1,251 common shares as director compensation. The shares were acquired on March 1, 2026 at a stated price of $0.00 per share, reflecting a grant rather than an open-market purchase.

After this award, his directly owned Ameren common stock holdings reported in this filing total 1,251 shares.

Ameren Corp Chairman, President & CEO Martin J. Lyons reported multiple stock transactions in Ameren common shares. He completed an open-market sale of 26,818 shares at $111.84 per share under a Rule 10b5-1 trading plan, leaving him with 282,681 directly held shares afterward.

On a prior date, 28,154 shares were withheld by the issuer at $113.28 per share to cover tax obligations tied to vesting performance share units and restricted stock units. The filing also notes 2,116 share equivalents held indirectly through the Ameren Corporation Savings Investment Plan’s unitized stock fund as of February 28, 2026.

Ameren Corp senior vice president Theresa A. Shaw reported a tax-related share disposition. On February 27, 2026, 1,296 shares of Ameren common stock were withheld by the company at $113.28 per share to cover tax obligations from vesting performance and restricted stock units, rather than being sold in the open market. After this withholding, she directly held 34,397 Ameren shares, and an additional 897 share equivalents were held indirectly through a 401(k) plan as of February 28, 2026.

Ameren Corp senior vice president of a subsidiary, Ajay K. Arora, reported a tax-related share disposition. On February 27, 2026, 1,035 common shares were withheld by the issuer at $113.28 per share to satisfy tax withholding obligations tied to vesting equity awards, leaving 15,499 directly owned shares.

He also reports indirect holdings of 1,717 share equivalents in the Ameren Corporation Savings Investment Plan as of February 28, 2026, and 21,037 shares held through a family trust.

Ameren Corp Group President, Utilities Michael L. Moehn reported a tax-related share disposition. On February 27, 2026, 14,355 shares of Ameren common stock were withheld by the company at $113.28 per share to cover tax obligations tied to vesting performance share units and restricted stock units.

After this withholding, Moehn directly owned 211,525 common shares. A separate footnote shows an additional 5,233 share equivalents held indirectly through the Ameren Corporation Savings Investment Plan as of February 28, 2026. The filing characterizes the disposition as a payment of tax liability using shares rather than an open-market sale.

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 Rafael Flores reported an open-market sale of common stock. On February 17, 2026, he sold 1,600 shares of Ameren common stock at an average price of $111.52 per share. After this transaction, he directly owned 13,953 shares of Ameren common stock.

Ameren Corp senior vice president of a subsidiary, Ajay K. Arora, reported an indirect open‑market sale of 3,000 shares of Ameren common stock at $111.44 per share through a family trust. After this sale, the trust held 21,037 shares, separate from his direct holdings and 401(k) plan units.

Ameren Corp senior vice president and chief accounting and treasury officer Theresa A. Shaw reported an open-market sale of company stock. On February 17, 2026, she sold 325 shares of Ameren common stock at an average price of $111.89 per share. After this sale, she directly held 35,693 Ameren shares. She also had an indirect interest in 895 share equivalents through the Ameren Corporation Savings Investment Plan as of January 31, 2026, reflecting holdings in a unitized stock fund within the 401(k) plan.

Ameren Corp insider Gwendolyn G. Mizell reported an open-market sale of Ameren common stock. She sold 3,548 shares of common stock at a price of $110.90 per share. After this sale, she directly owned 7,267 shares. She also indirectly held 2,423 share equivalents through the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation subsidiary chairman and president Shawn E. Schukar reported stock-based awards and holdings. On February 5, 2026, he acquired 2,824 restricted stock units under Ameren’s 2022 Omnibus Incentive Compensation Plan, at a stated price of $0. These units are scheduled to vest on a payment date in 2029, no later than March 15, 2029, subject to the plan and award terms. On the same date he also acquired 5,699 common shares upon vesting of previously granted performance share units, also at a stated price of $0. Following these transactions, he directly held 59,191 and then 64,953 Ameren common shares, which include 63 dividend-equivalent shares credited during the fourth quarter of 2025. Separately, as of January 31, 2026, he indirectly held an estimated 3,151 share equivalents in a unitized Ameren stock fund within the Ameren Corporation Savings Investment Plan through his 401(k).

Ameren Corporation EVP and CFO Leonard P. Singh reported stock-based awards and increased share holdings. On February 5, 2026, he acquired 5,508 restricted stock units under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest no later than March 15, 2029.

He also acquired 9,515 common shares upon vesting of previously granted performance share units, including 418 dividend-equivalent shares accumulated during 2025. Following these transactions, he directly owns 38,254 Ameren common shares and indirectly holds 90 share equivalents through the Ameren Corporation Savings Investment Plan.

Ameren Corporation officer Patrick E. Smith, Chairman & President of a subsidiary, reported stock awards dated February 5, 2026. He acquired 3,663 restricted stock units under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest on a payment date in 2029, no later than March 15, 2029. He also acquired 2,178 common shares upon vesting of previously granted performance share units, with the amount including 24 dividend-equivalent shares from the fourth quarter of 2025. Following these acquisitions, Smith held 20,822 Ameren common shares directly, plus indirect beneficial holdings of 3,045 share equivalents in a 401(k) plan and 1,090 shares held by his spouse.

Ameren Corporation insider activity centers on equity awards and vesting. Gwendolyn G. Mizell, SVP and Chief Sustainability Officer of a subsidiary, received 865 shares of common stock on February 5, 2026 as restricted stock units granted at $0 under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest by March 15, 2029. On the same date, 2,276 shares were acquired upon vesting of previously granted performance share units. Following these transactions, she directly held 10,815 common shares and indirectly held an estimated 2,423 share equivalents through the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation Group President, Utilities Michael L. Moehn reported equity-related transactions in Ameren common stock. On February 5, 2026, he acquired 9,955 restricted stock units at $0 per share under Ameren's 2022 Omnibus Incentive Compensation Plan, which are scheduled to vest on a payment date in 2029, no later than March 15, 2029.

On the same date, Moehn also acquired 22,849 Ameren common shares at $0 per share upon vesting of previously granted performance share units. Following these transactions, he beneficially owned 225,880 Ameren common shares directly and held an additional 5,230 share equivalents indirectly through the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation SVP Finance Ryan J. Martin reported equity awards and holdings in company stock. On February 5, 2026, he acquired 1,294 shares of Ameren common stock at $0 per share in the form of restricted stock units granted under the 2022 Omnibus Incentive Compensation Plan, which are scheduled to vest by March 15, 2029. He also acquired 1,752 shares of common stock upon vesting of previously granted performance share units, bringing his directly held Ameren common stock to 28,505 shares, including 42 dividend-equivalent shares accrued in the fourth quarter of 2025. Separately, he indirectly holds an estimated 1,788 share equivalents through the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation senior vice president Ajay K. Arora reported stock-based compensation activity. On February 5, 2026, he acquired 1,467 restricted stock units granted under Ameren’s 2022 Omnibus Incentive Compensation Plan, which are scheduled to vest on a payment date in 2029, no later than March 15, 2029.

He also acquired 2,498 shares of common stock upon vesting of previously granted performance share units, bringing his directly held common stock to 16,534 shares, which includes shares and dividend equivalents added during the fourth quarter of 2025. In addition, he indirectly holds 1,716 share equivalents through a 401(k) plan and 24,037 shares through a family trust.

Ameren Corporation executive Mark C. Lindgren reported new equity awards and share vesting. On February 5, 2026, he acquired 2,082 restricted stock units at $0 under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest by a payment date no later than March 15, 2029.

On the same date, he also acquired 4,349 common shares at $0 upon vesting of previously granted performance share units, including 94 dividend-equivalent shares. After these transactions, he directly held 49,099 Ameren common shares and indirectly held 1,731 share equivalents through the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation Chairman, President and CEO Martin J. Lyons Jr. reported equity compensation activity involving the company’s common stock. On February 5, 2026, he received 23,170 restricted stock units at $0 per share value, bringing one reported direct holding line to 290,853 shares. He also acquired 44,840 shares at $0 per share upon vesting of previously granted performance share units, increasing another reported direct holding line to 337,652 shares, which includes 1,959 dividend equivalents. In addition, he indirectly holds an estimated 2,109 share equivalents in Ameren’s Savings Investment Plan through a 401(k) unitized stock fund as of January 31, 2026.

Ameren Corporation senior vice president of a subsidiary, Eric V. Seidler, reported share awards and holdings changes dated February 5, 2026. He received 1,066 restricted stock units under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest with a payment date no later than March 15, 2029.

He also acquired 2,364 common shares upon vesting of previously granted performance share units, both at a reported price of $0 per share. Following these transactions, he directly owned 15,023 Ameren shares, and indirectly held an estimated 1,789 share equivalents in the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation senior vice president and chief accounting and tax officer Theresa A. Shaw reported new equity awards and updated holdings. On 02/05/2026 she received 1,333 restricted stock units under Ameren's 2022 Omnibus Incentive Compensation Plan, scheduled to vest on a payment date in 2029, no later than March 15, 2029.

She also acquired 3,126 shares of common stock upon vesting of previously granted performance share units, with both awards priced at $0 per share. After these transactions, she directly owned 36,018 Ameren common shares, and indirectly held an estimated 895 share equivalents in the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation executive David Matthew Feinberg reported a stock acquisition. On February 5, 2026, the EVP, General Counsel and Secretary acquired 4,449 shares of Ameren common stock at a price of $0 per share, likely reflecting an equity or incentive award rather than an open-market purchase.

Following this transaction, Feinberg beneficially owned 8,260 shares of Ameren common stock directly, with the amount including 27 dividend equivalents credited during the fourth quarter of 2025 under the company’s 2022 Omnibus Incentive Compensation Plan. He also held an estimated 9 share equivalents indirectly through the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Ameren Corporation Group President, Utilities Michael L. Moehn reported selling 6,500 shares of Ameren common stock on February 2, 2026 at a price of $103.60 per share. After this sale, he directly held 193,076 shares of Ameren common stock.

In addition to his direct holdings, Moehn beneficially owned an estimated 5,230 share equivalents through a unitized stock fund in the Ameren Corporation Savings Investment Plan as of January 31, 2026. The reported direct amount includes 603 accrued dividend equivalents tied to restricted stock units.

Ameren Corporation director Jamie L. Engstrom reported receiving 1,686 shares of Ameren common stock on 01/05/2026. The Form 4 shows the transaction as an acquisition coded "A" at a reported price of $0 per share, with a footnote stating the award represents director compensation. Following this grant, Engstrom is shown as beneficially owning 1,686 shares of Ameren common stock in a direct ownership capacity.

Ameren Corp director Steven H. Lipstein reported an award of 1,686 shares of common stock on January 5, 2026, as director compensation. The shares were acquired at a reported price of $0 per share, reflecting a stock-based compensation grant rather than an open-market purchase. Following this transaction, Lipstein beneficially owns 37,862 shares of Ameren common stock in direct ownership.

Ameren Corp director reports stock compensation grant. Director Catherine S. Brune reported receiving 1,686 shares of Ameren Corp common stock on 01/05/2026, coded as an acquisition. The shares were granted at a price of $0 per share as part of director compensation, increasing her directly held stake to 27,078 shares of Ameren common stock.

Ameren Corp director Leo S. Mackay Jr. reported receiving 1,686 shares of Ameren common stock on January 5, 2026 as an award classified as director compensation. The shares were acquired at a stated price of $0 per share, indicating they were granted rather than purchased on the open market. Following this grant, he beneficially owns 11,834 Ameren shares in total on a direct basis. This total includes 283 shares accumulated during the first through fourth quarters of 2025 through reinvested dividends.

Ameren Corporation disclosed that director Craig S. Ivey received 1,686 shares of common stock on January 5, 2026 as director compensation. The shares were awarded at a price of $0 per share, indicating they were granted rather than purchased in the market. Following this award, Ivey beneficially owned 16,597 Ameren common shares in direct form. This total includes 416 shares that were acquired during the first through fourth quarters of 2025 through reinvested dividends.

Ameren Corporation director Rafael Flores reported a stock award of 1,686 common shares on January 5, 2026. The shares were acquired at a price of $0 per share as director compensation, reflecting non-cash equity pay.

After this transaction, Flores beneficially owned 15,553 Ameren common shares in direct form. This total includes 96 shares that were accumulated during the fourth quarter of 2025 through reinvested dividends, indicating ongoing participation in dividend reinvestment.

Ameren Corp director Ward H. Dickson reported a stock award of 1,686 shares of Ameren common stock on January 5, 2026 as director compensation. The shares were acquired at a stated price of $0 per share, reflecting a non‑cash equity grant rather than an open-market purchase. After this award, he beneficially owned 18,946 Ameren shares in direct form. This total includes 481 shares accumulated during the first through fourth quarters of 2025 through reinvested dividends, showing that part of his holdings has grown via dividend reinvestment rather than additional transactions.

Ameren Corporation director Ellen M. Fitzsimmons reported a stock award from the company. On January 5, 2026, she acquired 1,686 shares of Ameren common stock at a price of $0 per share, described as director compensation.

After this grant, she beneficially owned 53,026 Ameren shares, held directly. This total includes 143 shares that were acquired during the first through fourth quarters of 2025 through reinvested dividends, showing that a portion of her holdings has been accumulated via dividend reinvestment.

Ameren Corporation director Cynthia J. Brinkley reported receiving 1,686 shares of Ameren common stock on January 5, 2026 as director compensation. The shares were awarded at a price of $0 per share, reflecting a stock-based compensation grant rather than an open-market purchase. Following this award, she beneficially owns 13,494 Ameren shares in total. That total includes 220 shares acquired during the first through fourth quarters of 2025 through reinvested dividends.