Board of directors (13)
Directors with a Section 16 filing in the last 13 months. “Since” is the first filing as a director; SEC data sets start in 2016.
Executive officers (9)
Company facts
- Chair
- Martin J. Lyons
- In S&P 500 since
- Sep 1991
- Incorporated in
- MO
- Fiscal year ends
- December
- SEC industry
- Electric & Other Services Combined
- SEC filings
- EDGAR
Connections to other S&P 500 companies
Current directors and officers who also hold a role at another S&P 500 company.
Major holders (5% or more)
Latest Schedule 13D/13G filing per holder. Holders that reported falling below 5% are not shown. Index funds usually report once a year.
No 5% holder filings parsed yet for this company.
Insider trades
Open-market purchases and sales reported on Form 4. Grants, option exercises and tax withholding are excluded.
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| Nov 3, 2026 | Michael L. Moehn Group President, Utilities | Sale | 6,500 | $110.72 | $720K |
| Sep 11, 2026 | Rafael Flores Director | Sale | 248 | $105.53 | $26K |
| Aug 20, 2026 | Ryan J. Martin SVP Finance | Sale | 500 | $109.88 | $55K |
| Aug 18, 2026 | Ryan J. Martin SVP Finance | Sale | 471 | $109.87 | $52K |
| Aug 14, 2026 | Theresa A. Shaw SVP and CATO | Sale | 325 | $108.93 | $35K |
| Aug 3, 2026 | Michael L. Moehn Group President, Utilities | Sale | 6,500 | $108.96 | $708K |
| May 14, 2026 | Theresa A. Shaw SVP and CATO | Sale | 325 | $109.08 | $35K |
| May 12, 2026 | Theresa A. Shaw SVP and CATO | Sale | 1,500 | $109.35 | $164K |
| May 1, 2026 | Michael L. Moehn Group President, Utilities | Sale | 6,500 | $113.63 | $739K |
| Mar 4, 2026 | Ryan J. Martin SVP Finance | Sale | 1,300 | $113.31 | $147K |
| Mar 3, 2026 | Mark C. Lindgren Director | Sale | 2,073 | $111.84 | $232K |
| Mar 3, 2026 | Shawn E. Schukar | Sale | 4,975 | $111.84 | $556K |
| Mar 3, 2026 | Martin J. Lyons Chairman, President & CEO | Sale | 26,818 | $111.84 | $3.0M |
| Feb 17, 2026 | Ajay K. Arora EVP of Subsidiary | Sale | 3,000 | $111.44 | $334K |
| Feb 17, 2026 | Theresa A. Shaw SVP and CATO | Sale | 325 | $111.89 | $36K |
| Feb 17, 2026 | Gwendolyn G. Mizell | Sale | 3,548 | $110.90 | $393K |
| Feb 17, 2026 | Rafael Flores Director | Sale | 1,600 | $111.52 | $178K |
| Feb 2, 2026 | Michael L. Moehn Group President, Utilities | Sale | 6,500 | $103.60 | $673K |
| Nov 17, 2025 | Rafael Flores Director | Sale | 225 | $105.21 | $24K |
| Nov 14, 2025 | Patrick E. Smith Chairman & President of Sub | Sale | 2,404 | $104.80 | $252K |
| Nov 14, 2025 | Theresa A. Shaw SVP and CATO | Sale | 325 | $104.77 | $34K |
| Nov 14, 2025 | Richard J. Harshman Director | Sale | 2,500 | $104.90 | $262K |
| Nov 3, 2025 | Michael L. Moehn Group President, Utilities | Sale | 6,500 | $101.44 | $659K |
| Sep 12, 2025 | Mark C. Lindgren Director | Sale | 3,500 | $100.89 | $353K |
| Sep 3, 2025 | Gwendolyn G. Mizell | Sale | 1,500 | $99.50 | $149K |
Board and executive changes
Every 8-K with Item 5.02 (departure, election or appointment of directors and officers). The text is the first paragraph of the item.
- Feb 9, 2026
(d) On February 6, 2026, the Board of Directors (the "Board") of Ameren Corporation ("Ameren") elected Timothy S. Rausch to the Board, with a term beginning on March 1, 2026, and expiring at Ameren's Annual Meeting of Shareholders in 2026. Also effective March 1, 2026, the Board appointed Mr. Rausch to the Finance Committee and the Nuclear, Operations and Environmental Sustainability Committee of the Board. No arrangement or understanding exists between Mr. Rausch and Ameren or, to Ameren's knowledge, any other person or persons pursuant to which Mr. Rausch was selected as a director. Mr. Rausch will participate in the Company’s standard non-employee director compensation program as more fully described in the Company’s Proxy Statement filed with the Securities and Exchange Commission on March 25, 2025. Mr.
Read the 8-K filing - Dec 15, 2025
(d) On December 12, 2025, the Board of Directors (the "Board") of Ameren Corporation ("Ameren") elected Jamie L. Engstrom to the Board, with a term beginning on January 1, 2026, and expiring at Ameren's Annual Meeting of Shareholders in 2026. Also effective January 1, 2026, the Board appointed Ms. Engstrom to the Audit and Risk Committee and the Cybersecurity and Digital Technology Committee of the Board. No arrangement or understanding exists between Ms. Engstrom and Ameren or, to Ameren's knowledge, any other person or persons pursuant to which Ms. Engstrom was selected as a director. Ms. Engstrom will participate in the Company’s standard non-employee director compensation program as more fully described in the Company’s proxy statement filed with the Securities and Exchange Commission on March 25, 2025. Ms.
Read the 8-K filing - Oct 14, 2025
On October 14, 2025, Ameren Corporation (the "Company") announced that Michael L. Moehn, Senior Executive Vice President and Chief Financial Officer of the Company, has been elected to the position of Group President, Ameren Utilities, of the Company, effective January 1, 2026. Also effective January 1, 2026, Leonard P. Singh, Chairman and President of Ameren Illinois Company ("Ameren Illinois"), has been elected Executive Vice President and Chief Financial Officer of the Company. Mr. Moehn, 56, has served as the Company's Senior Executive Vice President and Chief Financial Officer since 2019. As previously announced, Mr. Moehn is also currently serving as the Interim Chairman and President of Ameren Missouri. He previously served as Chairman and President of Ameren Missouri from 2014 to 2019. Mr. Singh, 56, has served as the Chairman and President of Ameren Illinois since August 2022.
Read the 8-K filing - Oct 3, 2025
On and effective October 2, 2025 (the "Effective Date"), Mark C. Birk informed Ameren Corporation (the "Company") of his decision to retire from his position as Chairman and President of Union Electric Company, doing business as Ameren Missouri ("Ameren Missouri"), and from each other position he holds with subsidiaries of the Company. As of the Effective Date, Michael L. Moehn, who currently serves as the Company's Senior Executive Vice President and Chief Financial Officer, has been elected to the additional position of Interim Chairman and President of Ameren Missouri. Mr. Moehn has served as the Company's Chief Financial Officer since 2019 and previously served as Chairman and President of Ameren Missouri from 2014 to 2019.
Read the 8-K filing - Apr 28, 2025
(b) On April 22, 2025, Noelle K. Eder notified the Board of Directors of Ameren Corporation (the "Company") that she was resigning as a director of the Company, effective as of May 6, 2025. Ms. Eder's resignation was for personal reasons in light of a change in her primary employment that will require her to reside outside of the United States and was not due to any disagreement with the Company on any matter relating to the Company’s operations, policies or practices.
Read the 8-K filing - Mar 27, 2025
(b) On March 24, 2025, Kimberly J. Harris notified the Board of Directors of Ameren Corporation (the "Company") that she was resigning as a director of the Company, effective immediately. Ms. Harris’s resignation was for personal reasons to focus on her health and recovery from a recent medical issue and not due to any disagreement with the Company on any matter relating to the Company’s operations, policies or practices.
Read the 8-K filing - Feb 3, 2025
(b) On January 30, 2025, Chonda J. Nwamu, Executive Vice President, General Counsel and Secretary of Ameren Corporation (the “Company”) informed the Company of her intent to resign from her roles with the Company and its subsidiaries, effective March 10, 2025.
Read the 8-K filing - Dec 16, 2024
(d) On December 13, 2024, the Board of Directors (the "Board") of Ameren Corporation ("Ameren") elected Mr. Steven O. Vondran to the Board, with a term beginning on January 1, 2025, and expiring at Ameren's Annual Meeting of Shareholders in 2025. Also effective January 1, 2025, the Board appointed Mr. Vondran to the Finance Committee and the Nuclear, Operations and Environmental Sustainability Committee of the Board. No arrangement or understanding exists between Mr. Vondran and Ameren or, to Ameren's knowledge, any other person or persons pursuant to which Mr. Vondran was selected as a director. Mr. Vondran will receive compensation for Board and committee service consistent with the compensation paid to the other non-employee directors of Ameren; in 2025, this compensation consists of an annual cash retainer of $125,000 and an annual grant of Ameren common stock valued at $170,000.
Read the 8-K filing - Dec 18, 2023
(d) On December 15, 2023, the Board of Directors (the "Board") of Ameren Corporation ("Ameren") elected Ms. Kimberly J. Harris to the Board, with a term beginning on January 1, 2024, and expiring at Ameren's Annual Meeting of Shareholders in 2024. Also effective January 1, 2024, the Board appointed Ms. Harris to the Nominating and Corporate Governance Committee and the Nuclear, Operations and Environmental Sustainability Committee of the Board. No arrangement or understanding exists between Ms. Harris and Ameren or, to Ameren's knowledge, any other person or persons pursuant to which Ms. Harris was selected as a director. Ms. Harris will receive compensation for Board and committee service as described on Exhibit 10.6 to Ameren's Annual Report on Form 10-K for the fiscal year ended December 31, 2021. Ms.
Read the 8-K filing - Oct 17, 2023
(e) On October 12, 2023, the Human Resources Committee (the "Committee") of the Board of Directors of Ameren Corporation (“Ameren”) approved a grant of performance-based restricted stock units ("RSUs") having an aggregate grant date value of $5.0 million (the "Award") to Michael L. Moehn, Senior Executive Vice President and Chief Financial Officer. The Award was granted effective as of November 1, 2023 (the "Effective Date") and will vest on October 31, 2028, subject to Mr. Moehn's continued service with Ameren during the five-year performance period. The Award is intended to (i) ensure leadership continuity following the previously announced retirement of Warner L. Baxter, Executive Chairman, on November 2, 2023, in support of the execution of Ameren's long-term business strategy; (ii) serve as a critical retention tool in a highly competitive environment for senior executives with Mr.
Read the 8-K filing - Aug 14, 2023
(b) On August 10, 2023, Warner L. Baxter, Executive Chairman of Ameren Corporation (the "Company"), notified the Company that he will retire from the Company's Board of Directors (the "Board") and as Executive Chairman, effective November 2, 2023. The Board has elected Martin J. Lyons, Jr., the President and Chief Executive Officer of the Company and a member of the Board, to the additional role of Chairman, effective upon Mr. Baxter's retirement on November 2, 2023. 2
Read the 8-K filing - May 16, 2022
On May 13, 2022, Richard J. Mark, Chairman and President of Ameren Illinois Company, a subsidiary of Ameren Corporation (the "Company"), notified the Company that he intends to retire from the Company and its affiliated entities effective August 1, 2022. Mr. Mark has agreed to work closely with the Company to facilitate an orderly transition for his successor, including through an extension of his retirement date, if needed. 2
Read the 8-K filing - May 13, 2022
At the annual meeting of shareholders of Ameren Corporation ("Ameren"), held on May 12, 2022 (the "Annual Meeting"), Ameren's shareholders approved the Ameren Corporation 2022 Omnibus Incentive Compensation Plan (the "2022 Plan"). The 2022 Plan was previously approved by Ameren's Board of Directors ("Board") on February 11, 2022, subject to shareholder approval. The 2022 Plan has been established to replace, on a prospective basis, the Ameren Corporation 2014 Omnibus Incentive Compensation Plan (the “2014 Plan”), which was previously approved by shareholders and expires on April 24, 2024. The 2022 Plan permits the grant of restricted stock, restricted stock units, stock options (incentive stock options and nonqualified stock options), stock appreciation rights, performance awards, cash-based awards and other stock-based awards.
Read the 8-K filing - Oct 12, 2021
On October 11, 2021, the Board of Directors (the “Board”) of Ameren Corporation (the “Company”) announced the election of Martin J. Lyons, Jr., Chairman and President of Union Electric Company, doing business as Ameren Missouri (“Ameren Missouri”), as President and Chief Executive Officer of the Company and as a member of the Board of Directors, effective January 1, 2022. Also effective January 1, 2022, Warner L. Baxter, the Company’s Chairman, President and Chief Executive Officer, was elected Executive Chairman of the Company and will remain a full-time employee and member of the Board of Directors. Mr. Lyons will report to the Executive Chairman. Mr. Lyons, 55, has served as the Chairman and President of Ameren Missouri since 2019.
Read the 8-K filing - Aug 17, 2021
On August 13, 2021, the Board of Directors of Ameren Corporation (the “Company”) elected Theresa A. Shaw as Senior Vice President, Finance and Chief Accounting Officer and the principal accounting officer of the Company, effective as of August 16, 2021. Ms. Shaw, age 48, joined Ameren Services Company (“Ameren Services”) in 2002 as a supervisor of Investor Relations and Financial Communications and was promoted to Director of External Reporting in 2009. In 2013, Ms. Shaw relinquished her position at Ameren Services and was elected Assistant Vice President and Controller of the Company. In 2014, she was elected Vice President of Internal Audit of the Company. In 2018, Ms.
Read the 8-K filing
Show 9 older changes
- Dec 14, 2020
(d) On December 11, 2020, the Board of Directors (the “Board”) of Ameren Corporation (“Ameren”) elected Mr. Leo S. Mackay, Jr. to the Board, with a term beginning on December 14, 2020, and expiring at Ameren’s Annual Meeting of Shareholders in 2021. Also effective December 14, 2020, the Board appointed Mr. Mackay to the Audit and Risk Committee and the Nuclear, Operations and Environmental Sustainability Committee of the Board. No arrangement or understanding exists between Mr. Mackay and Ameren or, to Ameren’s knowledge, any other person or persons pursuant to which Mr. Mackay was selected as a director. Mr. Mackay will receive compensation for Board and committee service as described on Exhibit 10.6 to Ameren’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019. From 2005 to present, Mr.
Read the 8-K filing - Sep 18, 2020
(e) On September 18, 2020, the Human Resources Committee of the Board of Directors (the “Board”) of Ameren Corporation (“Ameren”) granted to each of Martin J. Lyons, Jr., Chairman and President of Union Electric Company, doing business as Ameren Missouri, and Michael L. Moehn, Executive Vice President and Chief Financial Officer of Ameren, a special award of time-based restricted stock units (“RSUs”), effective as of September 18, 2020, which will cliff-vest after three years on September 17, 2023. The RSUs are intended to serve as critical retention tools for these two executives whose demonstrated track record of strong performance and leadership skills are integral to the execution of Ameren’s long-term business strategy and the delivery of superior value to Ameren’s customers and shareholders, as well as for prudent succession planning purposes. The number of RSUs granted to Mr.
Read the 8-K filing - Dec 3, 2019
(d) On December 2, 2019, the Board of Directors (the “Board”) of Ameren Corporation (“Ameren”) elected Ms. Cynthia J. Brinkley to the Board, with a term beginning on December 3, 2019, and expiring at Ameren’s Annual Meeting of Shareholders in 2020. Also effective December 3, 2019, the Board appointed Ms. Brinkley to the Human Resources Committee and the Nuclear and Operations Committee of the Board. No arrangement or understanding exists between Ms. Brinkley and Ameren or, to Ameren’s knowledge, any other person or persons pursuant to which Ms. Brinkley was selected as a director. Ms. Brinkley will receive compensation for Board and committee service as described on Exhibit 10.4 to Ameren’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018. From 2014 until her retirement in February 2019, Ms.
Read the 8-K filing - Oct 15, 2019
On October 11, 2019, the Board of Directors of Ameren Corporation (“Ameren”) elected Michael L. Moehn, 50, to the position of Executive Vice President and Chief Financial Officer of Ameren, effective as of December 1, 2019 (the “Effective Date”). On the Effective Date, Mr. Moehn will relinquish his position as Chairman and President of Union Electric Company, doing business as Ameren Missouri (“Ameren Missouri”). On October 14, 2019, the Board of Directors of Ameren Missouri elected Martin J. Lyons, Jr., 53, to the position of Chairman and President of Ameren Missouri, effective as of the Effective Date. On the Effective Date, Mr. Lyons will relinquish his position as Executive Vice President and Chief Financial Officer of Ameren. Mr. Moehn joined Ameren Services Company (“Ameren Services”) in 2000 as an Assistant Controller.
Read the 8-K filing - Jan 7, 2019
(b) On January 2, 2019, Gregory L. Nelson, Senior Vice President, General Counsel and Secretary of Ameren Corporation (the “Company”), notified the Company of his intention to retire effective August 1, 2019, after over 23 years of service.
Read the 8-K filing - Dec 18, 2018
(d) On December 14, 2018, the Board of Directors (the “Board”) of Ameren Corporation (“Ameren”) elected Ms. Noelle K. Eder to the Board, with a term beginning on December 15, 2018, and expiring at Ameren’s Annual Meeting of Shareholders in 2019. Also effective December 15, 2018, the Board appointed Ms. Eder to the Audit and Risk Committee and Nuclear and Operations Committee of the Board. No arrangement or understanding exists between Ms. Eder and Ameren or, to Ameren’s knowledge, any other person or persons pursuant to which Ms. Eder was selected as a director. Ms. Eder will receive compensation for Board and committee service as described on Exhibit 10.4 to Ameren’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017. Ms. Eder has served as the Executive Vice President and Chief Information and Digital Officer of Hilton Worldwide Holdings Inc. since March 2018.
Read the 8-K filing - Jun 7, 2018
(d) On June 7, 2018, the Board of Directors (the “Board”) of Ameren Corporation (“Ameren”) elected Mr. Ward H. Dickson to the Board, with a term beginning on June 7, 2018, and expiring at Ameren’s Annual Meeting of Shareholders in 2019. Also effective June 7, 2018, the Board appointed Mr. Dickson to the Audit and Risk Committee and Finance Committee of the Board. No arrangement or understanding exists between Mr. Dickson and Ameren or, to Ameren’s knowledge, any other person or persons pursuant to which Mr. Dickson was selected as a director. Mr. Dickson will receive compensation for Board and committee service as described on Exhibit 10.4 to Ameren’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017. Mr. Dickson has served as the Executive Vice President and Chief Financial Officer of WestRock Company since July 2015.
Read the 8-K filing - Mar 13, 2018
(d) On March 9, 2018, the Board of Directors (the “Board”) of Ameren Corporation (“Ameren”) elected Mr. Craig S. Ivey to the Board, with a term beginning on March 9, 2018, and expiring at Ameren’s Annual Meeting of Shareholders in 2018. Also effective March 9, 2018, the Board appointed Mr. Ivey to the Audit and Risk Committee and the Nuclear and Operations Committee of the Board. No arrangement or understanding exists between Mr. Ivey and Ameren or, to Ameren’s knowledge, any other person or persons pursuant to which Mr. Ivey was selected as a director. Mr. Ivey will receive compensation for Board and committee service as described on Exhibit 10.4 to Ameren’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017. Mr. Ivey served as President of Consolidated Edison Company of New York, Inc. (“Con Edison”) from December 2009 through his retirement in December 2017.
Read the 8-K filing - Dec 13, 2017
At the meeting of the Human Resources Committee (the “ Committee ”) of the Board of Directors of Ameren Corporation (“ Ameren ”), held on December 7, 2017, the Committee approved new forms of award agreements for Ameren’s annual equity awards to be granted in 2018 and a new severance plan for its officers. Both actions are described in more detail below. 2018 Long Term Incentive Program The following description explains certain changes to Ameren’s annual equity award grants for 2018 (the “ 2018 LTIP ”). Pursuant to the 2018 LTIP, annual equity award grants in 2018 consist of a mix of performance share units (“ PSUs ”) and restricted stock units (“ RSUs ”). Participants will receive 70% of the value of their award in the form of PSUs and 30% of the value of their award in the form of RSUs. Previously, participants received 100% of the value of their award in the form of PSUs.
Read the 8-K filing
Proxy statements (DEF 14A): 2026 · 2025 · 2024 · 2023 · 2022 · 2021
Share price
Annual financials
From the company's 10-K XBRL data (SEC companyfacts).
| Fiscal year | Revenue | Net income | Margin | Diluted EPS | Total assets |
|---|---|---|---|---|---|
| FY2025 | $8.8B | $1.5B | 16.6% | $5.35 | $48.5B |
| FY2024 | $7.6B | $1.2B | 15.6% | $4.42 | $44.6B |
| FY2023 | $7.5B | $1.2B | 15.4% | $4.38 | $40.8B |
| FY2022 | $8.0B | $1.1B | 13.6% | $4.14 | $37.9B |
| FY2021 | $6.4B | $995.0M | 15.6% | $3.84 | $35.7B |
| FY2020 | $5.8B | $877.0M | 15.1% | $3.50 | $32.0B |
| FY2019 | $5.9B | $834.0M | 14.1% | $3.35 | $28.9B |
| FY2018 | $6.3B | $821.0M | 13.1% | $3.32 | $27.2B |
Former directors and officers (24)
People who stopped filing as an insider of this company. “Last filing” is the last Form 3/4/5, an upper bound on when they left.