Ameren (AEE) Market Cap 1997–2026

As of October 29, 2026, Ameren had a market cap of $30.51 billion, which increased by 2.07% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Oct 29, 2026, 4:00 PM ET

Ameren Corp. (AEE)

🌍 United States 📈 NYSE 🏭 Utilities 🏢 Multi-Utilities

Latest Market Cap

$30.51B ▲ 2.07%

Start of 2026

$27.01B ▲ 12.96%

1 Year Ago

$27.78B ▲ 9.83%

All-Time High

$32.74B ▼ 6.81%

Loading data...

Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.

📈 Ameren Market Cap History by Year and Month

Ameren Market Cap History by Year and Month
Year / Month	Market Cap	% Change
2026	$30.51B	▲ 12.96%
October 29, 2026	$30.51B	▲ 10.91%
September 30, 2026	$27.51B	▼ 6.24%
August 31, 2026	$29.34B	▼ 3.30%
July 31, 2026	$30.34B	▼ 3.01%
June 30, 2026	$31.28B	▲ 4.69%
May 29, 2026	$29.88B	▼ 4.90%
April 30, 2026	$31.42B	▲ 3.42%
March 31, 2026	$30.38B	▼ 0.85%
February 27, 2026	$30.64B	▲ 9.66%
January 30, 2026	$27.94B	▲ 3.44%
2025	$27.01B	▲ 12.27%
December 31, 2025	$27.01B	▼ 6.12%
November 28, 2025	$28.77B	▲ 4.28%
October 31, 2025	$27.59B	▼ 2.27%
September 30, 2025	$28.23B	▲ 4.63%
August 29, 2025	$26.98B	▼ 1.35%
July 31, 2025	$27.35B	▲ 5.35%
June 30, 2025	$25.96B	▼ 0.84%
May 30, 2025	$26.18B	▼ 2.39%
April 30, 2025	$26.82B	▼ 1.18%
March 31, 2025	$27.14B	▼ 0.99%
February 28, 2025	$27.41B	▲ 7.79%
January 31, 2025	$25.43B	▲ 5.70%
2024	$24.059B	▲ 26.49%
December 31, 2024	$24.059B	▼ 4.51%
November 29, 2024	$25.196B	▲ 8.36%
October 31, 2024	$23.252B	▼ 0.39%
September 30, 2024	$23.343B	▲ 6.03%
August 30, 2024	$22.015B	▲ 4.08%
July 31, 2024	$21.151B	▲ 11.54%
June 28, 2024	$18.963B	▼ 3.08%
May 31, 2024	$19.566B	▼ 0.68%
April 30, 2024	$19.699B	▼ 0.06%
March 28, 2024	$19.711B	▲ 3.98%
February 29, 2024	$18.957B	▲ 2.33%
January 31, 2024	$18.526B	▼ 2.60%
2023	$19.021B	▼ 17.26%
December 29, 2023	$19.021B	▼ 6.77%
November 30, 2023	$20.402B	▲ 2.49%
October 31, 2023	$19.907B	▲ 1.25%
September 29, 2023	$19.662B	▼ 5.60%
August 31, 2023	$20.828B	▼ 7.47%
July 31, 2023	$22.51B	▲ 4.92%
June 30, 2023	$21.455B	▲ 0.78%
May 31, 2023	$21.29B	▼ 8.88%
April 28, 2023	$23.364B	▲ 2.99%
March 31, 2023	$22.686B	▲ 4.67%
February 28, 2023	$21.673B	▼ 4.79%
January 31, 2023	$22.763B	▼ 0.98%
2022	$22.988B	▲ 0.22%
December 30, 2022	$22.988B	▼ 0.45%
November 30, 2022	$23.091B	▲ 9.57%
October 31, 2022	$21.075B	▲ 1.22%
September 30, 2022	$20.822B	▼ 12.99%
August 31, 2022	$23.93B	▼ 0.54%
July 29, 2022	$24.059B	▲ 3.04%
June 30, 2022	$23.349B	▼ 5.01%
May 31, 2022	$24.581B	▲ 2.46%
April 29, 2022	$23.99B	▼ 0.90%
March 31, 2022	$24.209B	▲ 9.29%
February 28, 2022	$22.151B	▼ 3.14%
January 31, 2022	$22.87B	▼ 0.30%
2021	$22.938B	▲ 16.01%
December 31, 2021	$22.938B	▲ 9.14%
November 30, 2021	$21.018B	▼ 3.21%
October 29, 2021	$21.714B	▲ 4.06%
September 30, 2021	$20.866B	▼ 7.50%
August 31, 2021	$22.557B	▲ 4.53%
July 30, 2021	$21.58B	▲ 4.87%
June 30, 2021	$20.578B	▼ 4.36%
May 28, 2021	$21.517B	▼ 0.76%
April 30, 2021	$21.681B	▲ 4.30%
March 31, 2021	$20.787B	▲ 16.75%
February 26, 2021	$17.804B	▼ 3.37%
January 29, 2021	$18.424B	▼ 6.82%
2020	$19.773B	▲ 4.57%
December 31, 2020	$19.773B	▲ 2.83%
November 30, 2020	$19.228B	▼ 4.12%
October 30, 2020	$20.054B	▲ 2.58%
September 30, 2020	$19.549B	▲ 0.02%
August 31, 2020	$19.546B	▼ 1.41%
July 31, 2020	$19.826B	▲ 14.03%
June 30, 2020	$17.386B	▼ 5.77%
May 29, 2020	$18.45B	▲ 2.72%
April 30, 2020	$17.961B	▼ 0.12%
March 31, 2020	$17.982B	▼ 7.56%
February 28, 2020	$19.452B	▼ 3.72%
January 31, 2020	$20.203B	▲ 6.85%
2019	$18.908B	▲ 18.55%
December 31, 2019	$18.908B	▲ 3.40%
November 29, 2019	$18.287B	▼ 4.34%
October 31, 2019	$19.117B	▼ 2.84%
September 30, 2019	$19.676B	▲ 3.76%
August 30, 2019	$18.963B	▲ 1.92%
July 31, 2019	$18.605B	▲ 0.86%
June 28, 2019	$18.447B	▲ 2.42%
May 31, 2019	$18.012B	▲ 0.78%
April 30, 2019	$17.872B	▼ 0.99%
March 29, 2019	$18.051B	▲ 3.57%
February 28, 2019	$17.428B	▲ 2.74%
January 31, 2019	$16.963B	▲ 6.36%
2018	$15.949B	▲ 11.43%
December 31, 2018	$15.949B	▼ 4.86%
November 30, 2018	$16.764B	▲ 6.26%
October 31, 2018	$15.777B	▲ 2.26%
September 28, 2018	$15.428B	▼ 0.02%
August 31, 2018	$15.431B	▲ 1.89%
July 31, 2018	$15.145B	▲ 2.15%
June 29, 2018	$14.826B	▲ 2.80%
May 31, 2018	$14.422B	▲ 0.97%
April 30, 2018	$14.283B	▲ 3.65%
March 29, 2018	$13.78B	▲ 4.59%
February 28, 2018	$13.175B	▼ 4.11%
January 31, 2018	$13.74B	▼ 4.00%
2017	$14.313B	▲ 12.45%
December 29, 2017	$14.313B	▼ 7.77%
November 30, 2017	$15.519B	▲ 3.18%
October 31, 2017	$15.041B	▲ 7.18%
September 29, 2017	$14.034B	▼ 3.58%
August 31, 2017	$14.555B	▲ 6.93%
July 31, 2017	$13.612B	▲ 2.63%
June 30, 2017	$13.263B	▼ 3.67%
May 31, 2017	$13.769B	▲ 3.77%
April 28, 2017	$13.269B	▲ 0.19%
March 31, 2017	$13.244B	▼ 0.19%
February 28, 2017	$13.269B	▲ 3.88%
January 31, 2017	$12.774B	▲ 0.36%
2016	$12.728B	▲ 21.36%
December 30, 2016	$12.728B	▲ 6.80%
November 30, 2016	$11.918B	▼ 1.66%
October 31, 2016	$12.119B	▲ 1.58%
September 30, 2016	$11.931B	▼ 0.50%
August 31, 2016	$11.991B	▼ 5.76%
July 29, 2016	$12.724B	▼ 2.12%
June 30, 2016	$12.999B	▲ 8.13%
May 31, 2016	$12.022B	▲ 3.23%
April 29, 2016	$11.646B	▼ 4.18%
March 31, 2016	$12.154B	▲ 6.70%
February 29, 2016	$11.391B	▲ 4.51%
January 29, 2016	$10.899B	▲ 3.92%
2015	$10.488B	▼ 6.28%
December 31, 2015	$10.488B	▼ 1.22%
November 30, 2015	$10.617B	▲ 0.18%
October 30, 2015	$10.598B	▲ 3.34%
September 30, 2015	$10.255B	▲ 4.90%
August 31, 2015	$9.776B	▼ 1.92%
July 31, 2015	$9.967B	▲ 9.04%
June 30, 2015	$9.141B	▼ 6.35%
May 29, 2015	$9.761B	▼ 1.73%
April 30, 2015	$9.933B	▼ 2.98%
March 31, 2015	$10.238B	▼ 0.51%
February 27, 2015	$10.29B	▼ 6.34%
January 30, 2015	$10.986B	▼ 1.83%
2014	$11.191B	▲ 27.58%
December 31, 2014	$11.191B	▲ 6.99%
November 28, 2014	$10.46B	▲ 1.82%
October 31, 2014	$10.273B	▲ 10.47%
September 30, 2014	$9.299B	▼ 4.16%
August 29, 2014	$9.703B	▲ 4.01%
July 31, 2014	$9.329B	▼ 5.93%
June 30, 2014	$9.917B	▲ 3.88%
May 30, 2014	$9.547B	▼ 4.75%
April 30, 2014	$10.023B	▲ 0.28%
March 31, 2014	$9.995B	▲ 1.94%
February 28, 2014	$9.805B	▲ 6.80%
January 31, 2014	$9.181B	▲ 4.66%
2013	$8.772B	▲ 17.70%
December 31, 2013	$8.772B	▲ 0.85%
November 29, 2013	$8.698B	▼ 0.91%
October 31, 2013	$8.778B	▲ 3.86%
September 30, 2013	$8.452B	▲ 3.04%
August 30, 2013	$8.203B	▼ 5.59%
July 31, 2013	$8.689B	▲ 3.99%
June 28, 2013	$8.356B	▲ 1.17%
May 31, 2013	$8.259B	▼ 6.09%
April 30, 2013	$8.795B	▲ 3.51%
March 28, 2013	$8.497B	▲ 3.65%
February 28, 2013	$8.198B	▲ 4.15%
January 31, 2013	$7.871B	▲ 5.61%
2012	$7.453B	▼ 7.13%
December 31, 2012	$7.453B	▲ 2.49%
November 30, 2012	$7.272B	▼ 8.85%
October 31, 2012	$7.978B	▲ 0.64%
September 28, 2012	$7.927B	▼ 0.15%
August 31, 2012	$7.939B	▼ 4.35%
July 31, 2012	$8.3B	▲ 1.99%
June 29, 2012	$8.138B	▲ 3.81%
May 31, 2012	$7.839B	▼ 1.47%
April 30, 2012	$7.956B	▲ 0.65%
March 30, 2012	$7.905B	▲ 1.59%
February 29, 2012	$7.781B	▲ 1.35%
January 31, 2012	$7.677B	▼ 4.34%
2011	$8.025B	▲ 18.42%
December 30, 2011	$8.025B	▼ 2.01%
November 30, 2011	$8.19B	▲ 6.05%
October 31, 2011	$7.723B	▲ 7.12%
September 30, 2011	$7.21B	▼ 1.41%
August 31, 2011	$7.313B	▲ 5.00%
July 29, 2011	$6.965B	▼ 0.04%
June 30, 2011	$6.968B	▼ 2.75%
May 31, 2011	$7.165B	▲ 1.37%
April 29, 2011	$7.068B	▲ 4.43%
March 31, 2011	$6.768B	▲ 0.58%
February 28, 2011	$6.729B	▼ 1.39%
January 31, 2011	$6.824B	▲ 0.69%
2010	$6.777B	▲ 2.14%
December 31, 2010	$6.777B	▼ 1.61%
November 30, 2010	$6.888B	▼ 0.89%
October 29, 2010	$6.95B	▲ 2.10%
September 30, 2010	$6.807B	▲ 1.37%
August 31, 2010	$6.715B	▲ 10.64%
July 30, 2010	$6.069B	▲ 6.79%
June 30, 2010	$5.683B	▼ 3.28%
May 28, 2010	$5.876B	▼ 5.01%
April 30, 2010	$6.186B	▼ 0.42%
March 31, 2010	$6.212B	▲ 5.84%
February 26, 2010	$5.869B	▼ 3.28%
January 29, 2010	$6.068B	▼ 8.55%
2009	$6.635B	▼ 6.03%
December 31, 2009	$6.635B	▲ 7.75%
November 30, 2009	$6.158B	▲ 6.78%
October 30, 2009	$5.767B	▼ 3.66%
September 30, 2009	$5.986B	▲ 3.53%
August 31, 2009	$5.782B	▲ 6.07%
July 31, 2009	$5.451B	▲ 2.25%
June 30, 2009	$5.331B	▲ 7.33%
May 29, 2009	$4.967B	▲ 1.04%
April 30, 2009	$4.916B	▼ 0.14%
March 31, 2009	$4.923B	▼ 2.48%
February 27, 2009	$5.048B	▼ 28.49%
January 30, 2009	$7.059B	▼ 0.03%
2008	$7.061B	▼ 37.47%
December 31, 2008	$7.061B	▼ 6.14%
November 28, 2008	$7.523B	▲ 9.63%
October 31, 2008	$6.862B	▼ 16.63%
September 30, 2008	$8.231B	▼ 6.46%
August 29, 2008	$8.799B	▲ 1.86%
July 31, 2008	$8.638B	▼ 2.65%
June 30, 2008	$8.873B	▼ 6.80%
May 30, 2008	$9.52B	▲ 0.19%
April 30, 2008	$9.502B	▲ 3.04%
March 31, 2008	$9.222B	▲ 4.07%
February 29, 2008	$8.861B	▼ 4.56%
January 31, 2008	$9.284B	▼ 17.78%
2007	$11.292B	▲ 1.89%
December 31, 2007	$11.292B	▲ 0.81%
November 30, 2007	$11.201B	▼ 0.39%
October 31, 2007	$11.245B	▲ 3.17%
September 28, 2007	$10.899B	▲ 3.39%
August 31, 2007	$10.542B	▲ 5.83%
July 31, 2007	$9.961B	▼ 1.82%
June 29, 2007	$10.146B	▼ 7.65%
May 31, 2007	$10.987B	▲ 0.96%
April 30, 2007	$10.883B	▲ 5.12%
March 30, 2007	$10.353B	▼ 3.64%
February 28, 2007	$10.744B	▼ 2.09%
January 31, 2007	$10.973B	▼ 0.98%
2006	$11.082B	▲ 5.88%
December 29, 2006	$11.082B	▼ 1.79%
November 30, 2006	$11.284B	▲ 1.16%
October 31, 2006	$11.155B	▲ 2.64%
September 29, 2006	$10.868B	▼ 1.42%
August 31, 2006	$11.024B	▲ 3.98%
July 31, 2006	$10.602B	▲ 2.01%
June 30, 2006	$10.393B	▲ 2.26%
May 31, 2006	$10.163B	▼ 1.67%
April 28, 2006	$10.336B	▲ 1.11%
March 31, 2006	$10.223B	▼ 1.47%
February 28, 2006	$10.375B	▼ 0.15%
January 31, 2006	$10.391B	▼ 0.73%
2005	$10.467B	▲ 6.95%
December 30, 2005	$10.467B	▼ 2.32%
November 30, 2005	$10.716B	▼ 0.23%
October 31, 2005	$10.741B	▼ 1.67%
September 30, 2005	$10.923B	▼ 2.41%
August 31, 2005	$11.193B	▼ 1.25%
July 29, 2005	$11.335B	▲ 0.58%
June 30, 2005	$11.27B	▲ 5.40%
May 31, 2005	$10.693B	▲ 5.63%
April 29, 2005	$10.123B	▲ 5.49%
March 31, 2005	$9.596B	▼ 4.54%
February 28, 2005	$10.052B	▲ 2.75%
January 31, 2005	$9.783B	▼ 0.04%
2004	$9.787B	▲ 30.62%
December 31, 2004	$9.787B	▲ 3.76%
November 30, 2004	$9.432B	▲ 0.88%
October 29, 2004	$9.35B	▲ 4.00%
September 30, 2004	$8.99B	▼ 1.10%
August 31, 2004	$9.09B	▲ 4.70%
July 30, 2004	$8.682B	▲ 10.25%
June 30, 2004	$7.875B	▼ 2.45%
May 28, 2004	$8.073B	▲ 1.10%
April 30, 2004	$7.985B	▼ 5.06%
March 31, 2004	$8.411B	▼ 2.52%
February 27, 2004	$8.628B	▲ 9.69%
January 30, 2004	$7.866B	▲ 4.98%
2003	$7.493B	▲ 16.97%
December 31, 2003	$7.493B	▲ 4.55%
November 28, 2003	$7.167B	▼ 1.10%
October 31, 2003	$7.247B	▲ 4.06%
September 30, 2003	$6.964B	▲ 1.27%
August 29, 2003	$6.877B	▲ 1.78%
July 31, 2003	$6.757B	▼ 5.30%
June 30, 2003	$7.135B	▼ 2.74%
May 30, 2003	$7.336B	▲ 11.12%
April 30, 2003	$6.602B	▲ 4.94%
March 31, 2003	$6.291B	▲ 4.71%
February 28, 2003	$6.008B	▼ 0.87%
January 31, 2003	$6.061B	▼ 5.39%
2002	$6.406B	▲ 9.69%
December 31, 2002	$6.406B	▲ 0.85%
November 29, 2002	$6.352B	▲ 2.44%
October 31, 2002	$6.201B	▼ 3.00%
September 30, 2002	$6.393B	▲ 0.13%
August 30, 2002	$6.385B	▲ 0.90%
July 31, 2002	$6.328B	▲ 1.93%
June 28, 2002	$6.208B	▼ 1.63%
May 31, 2002	$6.311B	▲ 4.80%
April 30, 2002	$6.022B	▼ 2.14%
March 28, 2002	$6.154B	▲ 9.42%
February 28, 2002	$5.624B	▼ 4.97%
January 31, 2002	$5.918B	▲ 1.34%
2001	$5.84B	▼ 8.10%
December 31, 2001	$5.84B	▲ 3.80%
November 30, 2001	$5.626B	▲ 2.01%
October 31, 2001	$5.515B	▲ 4.67%
September 28, 2001	$5.269B	▼ 6.91%
August 31, 2001	$5.66B	▲ 4.99%
July 31, 2001	$5.391B	▼ 7.99%
June 29, 2001	$5.859B	▼ 4.26%
May 31, 2001	$6.12B	▲ 6.27%
April 30, 2001	$5.759B	▲ 2.49%
March 30, 2001	$5.619B	▼ 2.90%
February 28, 2001	$5.787B	▲ 3.41%
January 31, 2001	$5.596B	▼ 11.94%
2000	$6.355B	▲ 41.41%
December 29, 2000	$6.355B	▲ 4.37%
November 30, 2000	$6.089B	▲ 11.64%
October 31, 2000	$5.454B	▼ 5.08%
September 29, 2000	$5.746B	▲ 3.55%
August 31, 2000	$5.549B	▲ 11.74%
July 31, 2000	$4.966B	▲ 7.23%
June 30, 2000	$4.631B	▼ 8.01%
May 31, 2000	$5.034B	— 0.00%
April 28, 2000	$5.034B	▲ 18.59%
March 31, 2000	$4.245B	▲ 3.11%
February 29, 2000	$4.117B	▼ 7.86%
January 31, 2000	$4.468B	▼ 0.58%
1999	$4.494B	▼ 23.28%
December 31, 1999	$4.494B	▼ 5.41%
November 30, 1999	$4.751B	▼ 8.44%
October 29, 1999	$5.189B	— 0.00%
September 30, 1999	$5.189B	▼ 5.60%
August 31, 1999	$5.497B	▲ 2.06%
July 30, 1999	$5.386B	▲ 2.28%
June 30, 1999	$5.266B	▼ 6.25%
May 28, 1999	$5.617B	▲ 5.80%
April 30, 1999	$5.309B	▲ 6.91%
March 31, 1999	$4.966B	▼ 3.01%
February 26, 1999	$5.12B	▼ 4.94%
January 29, 1999	$5.386B	▼ 8.06%
1998	$5.858B	▼ 1.30%
December 31, 1998	$5.858B	▲ 3.64%
November 30, 1998	$5.652B	▲ 3.14%
October 30, 1998	$5.48B	▼ 4.78%
September 30, 1998	$5.755B	▲ 6.00%
August 31, 1998	$5.429B	▲ 4.63%
July 31, 1998	$5.189B	▼ 4.86%
June 30, 1998	$5.454B	▲ 1.58%
May 29, 1998	$5.369B	▼ 1.25%
April 30, 1998	$5.437B	▼ 5.93%
March 31, 1998	$5.78B	▲ 9.59%
February 27, 1998	$5.274B	▲ 4.93%
January 30, 1998	$5.026B	▼ 15.32%
1997	$5.935B	▲ 17.29%
December 31, 1997	$5.935B	▲ 8.64%
November 28, 1997	$5.463B	▲ 5.65%
October 31, 1997	$5.171B	▼ 1.95%
September 30, 1997	$5.274B	▲ 3.35%
August 29, 1997	$5.103B	▼ 3.41%
July 31, 1997	$5.283B	▲ 2.17%
June 30, 1997	$5.171B	▲ 2.88%
May 30, 1997	$5.026B	▲ 2.82%
April 30, 1997	$4.888B	▼ 3.40%
March 31, 1997	$5.06B	— 0.00%

All market cap values reflect closing prices for the period shown.

📊 Ameren Market Cap and Other Industry Peers

Below are selected companies from the Utilities sector / subsector:

Note: Market capitalization figures are based on available sources and may differ slightly from actual values, particularly for historical data.