AEE Market Cap History — Ameren Capitalization Over Time

As of 1/30/2026 Ameren has a market cap of 28.55 billion. Investors often follow the AEE market cap history to compare the size of the company over time.

This page shows AEE market capitalization trends over time, with 44 market cap datapoints presented, dating back to 4/30/2010.

Quick links: Market Cap History Table  |  Market Cap History Chart  |  About Ameren
AEE Market Cap History



AEE Market Cap History Table
Below is a table of the AEE market cap history going back to 4/30/2010:

Date AEE Market Cap
4/30/20106.19B
1/31/20116.82B
10/31/20117.72B
1/31/20127.68B
4/30/20127.96B
7/31/20128.30B
10/31/20127.98B
1/31/20137.87B
4/30/20138.80B
7/31/20138.69B
10/31/20138.78B
1/31/20149.18B
4/30/201410.02B
7/31/20149.33B
9/30/20149.30B
1/30/201510.99B
4/30/20159.93B
7/31/20159.97B
10/30/201510.60B
1/29/201610.90B
4/29/201611.65B
7/29/201612.72B
10/31/201612.12B
1/31/201712.77B
4/28/201713.27B
7/31/201713.61B
10/31/201715.04B
1/31/201813.74B
4/30/201814.28B
7/31/201815.15B
10/31/201815.78B
1/31/201916.96B
4/30/201917.87B
7/31/201918.60B
10/31/201919.12B
1/31/202020.20B
4/30/202419.70B
7/31/202421.15B
10/31/202423.25B
1/31/202525.43B
4/30/202526.82B
7/31/202527.35B
10/31/202527.60B
1/30/202628.55B

Also see: AEE Shares Outstanding History
and AEE YTD Return
AEE Market Cap History Chart
AEE Historical Market Cap:
+10.19% CAGR
AEE Historical Market Cap: +10.19% CAGR

Mouse over chart for data details
4/30/2010 ...1/30/2026
AEE Stock Price Chart
About Ameren Corp
Ameren Corporation is a public utility holding company. Co. operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. The Ameren Missouri segment includes all of the operations of Ameren Missouri. Ameren Missouri operates a rate-regulated electric generation, transmission, and distribution business and a rate-regulated natural gas distribution business in Missouri. The Ameren Illinois Electric Distribution segment consists of the electric distribution business of Ameren Illinois. The Ameren Illinois Natural Gas segment consists of the natural gas business of Ameren Illinois. We show 44 historical shares outstanding datapoints in our AEE shares outstanding history coverage, used to compute AEE market cap on those dates.

Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing AEE market cap history over the course of time is important for investors interested in comparing AEE's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of AEE versus a peer is one thing; comparing AEE market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like AEE can fluctuate over the course of history. With this page we aim to empower investors researching AEE by allowing them to research the AEE market cap history.
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AEE Share Performance
Market Cap Peers
Ameren (AEE) is categorized under the Utilities sector; to help you further research historical market cap numbers, below are some other companies in the same sector:

AEP Market Cap History
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