American Electric Power (AEP) Market Cap 1985–2026

As of March 13, 2026, American Electric Power had a market cap of $72.26 billion, which increased by 1.05% 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: Mar 13, 2026, 4:00 PM ET
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American Electric Power Co Inc. (AEP)

🌍 United States 📈 NASDAQ 🏭 Utilities 🏢 Electric Utilities
Latest Market Cap
$72.26B ▲ 1.05%
Jan 1, 2026
$61.72B ▲ 17.08%
1 Year Ago
$56.34B ▲ 28.26%
All-Time High
$72.38B ▼ 0.17%


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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.


📈 American Electric Power Market Cap History by Year and Month

American Electric Power Market Cap History by Year and Month
Year / MonthMarket Cap% Change
2026$72.26B▲ 17.08%
$72.26B▼ 0.17%
$72.38B▲ 12.90%
$64.11B▲ 3.87%
2025$61.72B▲ 25.57%
2024$49.15B▲ 15.07%
2023$42.712B▼ 12.46%
2022$48.791B▲ 8.76%

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


📊 American Electric Power Market Cap and Other Industry Peers

Below are selected companies from the Electric Utilities sector / subsector:

  1. $109.71B
  2. $109.24B
  3. $103.55B
  4. $72.26B
  5. $51.1B
  6. $50.96B
  7. $47.83B
  8. $39.87B
  9. $32.47B
  10. $29.57B
  11. $28.93B
  12. $27.6B
  13. $27.45B
  14. $19.03B
  15. $18.72B
  16. $12.44B
  17. $9.97B
  18. $9.12B
  19. $7.82B
  20. $6.41B

Data reflect the most recent market capitalization values available.

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

For American Electric Power Co Inc. (AEP), market capitalization represents the total market value of the company’s publicly traded shares. It helps investors understand American Electric Power’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 American Electric Power 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 American Electric Power’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, American Electric Power had a market capitalization of $72.26 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.