Companies using IBM OS/400 by IBM in 2025
As of 2025, 1,453 verified companies use IBM OS/400 – across industries, company sizes, and geographies. This is real, verified data. Whether you’re looking to analyze the market, build a target list, or get a sales edge – this is your starting point.
What is IBM OS/400 by IBM?
IBM OS/400 by IBM is an operating system designed for the IBM i series of servers. It is known for its stability, security features, and integrated database management. It’s commonly employed in industries such as finance, retail, and manufacturing, primarily within IT departments for server management and application deployment.
Last updated date
August 17, 2025
Number of Companies using
1,453
The majority are based in the
United States
Most common industry?
Manufacturing
IBM OS/400’s sample user list in 2025
Company Name
Country
Industry
Employees
Revenue
Product
Walmart
United States
United States
Department Stores, Shopping Centers & Superstores
2098500
$681B
IBM OS/400
Costco Wholesale
United States
United States
Department Stores, Shopping Centers & Superstores
333000
$268.8B
IBM OS/400
We have data on 1,453 companies that use IBM OS/400. Our IBM OS/400 customers list is available for download and comes enriched with vital company specifics, including industry classification, organizational size, geographical location, funding rounds, and revenue figures, among others.
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IBM OS/400 users and customers by country
United States
France
2.6K Companies
United Kingdom
2.6K Companies
Canada
2.6K Companies
Germany
2.6K Companies
Where IBM OS/400 Shows Up Most
IBM OS/400 is used across a wide range of sectors:
Manufacturing
Business Services
Retail
Finance
Custom Software & IT Services
From lean startups to global enterprises, IBM OS/400’s footprint is wide, and that means opportunity.
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FAQs
Contact UsHow latest this data is?
This data is updated on August 17, 2025
What is IBM OS/400?
IBM OS/400 is an operating system designed for the IBM i series of servers. It is known for its stability, security features, and integrated database management.
How many companies are using IBM OS/400 in 2025?
As of 2025, there are 1,453 verified companies using IBM OS/400.
What industries commonly use IBM OS/400?
IBM OS/400 is commonly employed in industries such as finance, retail, and manufacturing.
What is the primary use of IBM OS/400 within companies?
It is primarily used within IT departments for server management and application deployment.
Which country has the highest number of companies using IBM OS/400?
The United States has the highest number of companies using IBM OS/400.