Ameren

Almost $20 trillion in revenue—and a record-breaking $1.87 trillion in profits. Introducing the 2025 Fortune 500, the definitive list of the biggest companies in America.

Fortune 500

The Fortune 500, in its 70th year in 2024, ranks the biggest U.S. companies by revenue.

The Fortune 500, in its 69th year in 2023, ranks the biggest U.S. companies by revenue.

This year’s Fortune 500 marks the 68th running of the list.

Companies on this year's list—which span the electrical, automotive, and medical device industries—invest in and trust their employees.

Best-Workplaces-Large-Manufacturing-Production-2021-Ameren-Corporation

Employees say: 
 
“The ability that we have to speak directly with leadership at Ameren is something that I believe sets it apart from other companies. It's one of the few places I've worked that seems to have an "open door" policy all the way to the top.”

Best Large Workplaces in Manufacturing and Production

This year’s Fortune 500 marks the 67th running of the list.

F500-2021-469-Ameren

Serving both central and eastern Missouri and southern Illinois, Ameren provides power and natural gas to more than 3 million customers.

Best Workplaces Manufacturing Production 2020-Ameren Corporation

Employees say: 
 
“I am given a lot of latitude and responsibility in my role despite being so early in my career. Ameren has shown more trust and faith in my knowledge, skills, and potential than anywhere else I have worked and it has been very rewarding for me.”

This year's Fortune 500 marks the 66th running of the list.

The utility provides electricity and natural gas to customers in Illinois and Missouri.

Ameren-Best Workplaces in Manufacturing 2019

Employees say:  
 
"Our senior management is very approachable, and the consistent, often repeated message is to treat each other with respect. They acknowledge that we will have differing opinions, but we must always have those discussions respectfully. " 
 
Read the Great Place to Work review .

This year's Fortune 500 marks the 65th running of the list.

This year's Fortune 500 marks the 64th running of the list.

This year's Fortune 500 marks the 63rd running of the list.

This year's Fortune 500 marks the 62nd running of the list.

This year's Fortune 500 marks the 61st running of the list. Wal-Mart claims the top spot again. See who made the list.

Wal-Mart stayed on top as its sales crept closer to half-a-trillion dollars. Apple moved into the top five. And UnitedHealth Group continued its steady climb. 

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Ameren

Ameren in Fortune Rankings

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