Ameren (AEE) Market Cap 1997–2025

As of December 12, 2025, Ameren had a market cap of $26.310 billion, which remained unchanged from 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: Dec 12, 2025, 4:00 PM ET
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Ameren Corp. (AEE)

🌍 United States 📈 NYSE 🏭 Utilities 🏢 Multi-Utilities
Latest Market Cap
$26.310B — 0.00%
Jan 1, 2025
$24.059B ▲ 9.36%
1 Year Ago
$23.981B ▲ 9.71%
All-Time High
$28.770B ▼ 8.55%


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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 / MonthMarket Cap% Change
2025$26.310B▲ 9.36%
$26.310B▼ 8.55%
$28.770B▲ 4.28%
$27.590B▼ 2.27%
$28.230B▲ 4.63%
$26.980B▼ 1.35%
$27.350B▲ 5.35%
$25.960B▼ 0.84%
$26.180B▼ 2.39%
$26.820B▼ 1.18%
$27.140B▼ 0.99%
$27.410B▲ 7.79%
$25.430B▲ 5.70%
2024$24.059B▲ 26.49%
2023$19.021B▼ 17.26%
2022$22.988B▲ 0.22%
2021$22.938B▲ 16.01%

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:

  1. $57.76B
  2. $50.66B
  3. $39.38B
  4. $35.20B
  5. $33.79B
  6. $33.32B
  7. $30.94B
  8. $27.22B
  9. $26.96B
  10. $26.31B
  11. $25.67B
  12. $25.57B
  13. $25.55B
  14. $25.14B
  15. $24.70B
  16. $22.44B
  17. $21.25B
  18. $19.60B
  19. $16.99B
  20. $16.79B

Data reflect the most recent market capitalization values available.

💡 What Is Market Capitalization and How Do We Calculate It?

For Ameren Corp. (AEE), market capitalization represents the total market value of the company’s publicly traded shares. It helps investors understand Ameren’s size within the utilities sector and compare it with other companies in the same industry.

In most cases, market capitalization is calculated by multiplying the current share price by the number of basic shares outstanding. Basic shares represent the actual number of common shares that currently exist, without including potential future shares from employee stock options, RSUs, warrants, or convertible securities. For example, if Ameren had one million basic shares and each traded at $50, its market capitalization would be $50 million.

Formula:
Market Cap = Share Price × Shares Outstanding

The value of Ameren’s market capitalization changes throughout the trading day because it mainly depends on the current share price. The number of shares outstanding typically remains stable unless the company issues new shares, buys back its own stock, or grants stock options to employees.

Based on the latest data, Ameren had a market capitalization of $26.310 billion, placing it in the large-cap category within the utilities industry.

Disclaimer: Despite all efforts, there may still be minor inaccuracies present in the data.