Companies using IBM z/OS by IBM in 2025
As of 2025, 2,844 verified companies use IBM z/OS – 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 z/OS by IBM?
IBM z/OS by IBM, is an operating system for IBM zSystems mainframes. It is designed for enterprise-level computing, offering high levels of security, availability, and performance. z/OS is used across various industries, including finance, government, and healthcare, primarily within IT departments for managing critical applications and data processing.
Last updated date
August 17, 2025
Number of Companies using
2,844
The majority are based in the
United States
Most common industry?
Manufacturing
IBM z/OS’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 z/OS
We have data on 2,844 companies that use IBM z/OS. Our IBM z/OS 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 z/OS users and customers by country
United States
United Kingdom
2.6K Companies
Canada
2.6K Companies
France
2.6K Companies
Germany
2.6K Companies
Where IBM z/OS Shows Up Most
IBM z/OS is used across a wide range of sectors:
Manufacturing
Finance
Business Services
Retail
Insurance
From lean startups to global enterprises, IBM z/OS’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 z/OS?
IBM z/OS is an operating system designed for IBM zSystems mainframes, known for its enterprise-level computing capabilities, high security, availability, and performance.
How many companies are using IBM z/OS in 2025?
As of 2025, there are 2,844 verified companies using IBM z/OS.
In which industries is IBM z/OS commonly used?
IBM z/OS is used across various industries, including manufacturing, finance, business services, retail, and insurance.
Which country has the highest number of companies using IBM z/OS?
The United States has the highest number of companies using IBM z/OS.
Can I get a list of companies using IBM z/OS?
Yes, a list of companies using IBM z/OS is available for download, enriched with company specifics like industry, size, location, funding, and revenue.