A breakdown of the 1K+ companies running IBM Mainframe.
Top industries
Information technology and services435
Financial services240
Professional and business services133
Industrial and manufacturing38
Media and telecommunications30
Construction and building22
Education and training18
Government and public services18
No industry recorded: 25
Company size
1–1064 (7%)
11–50118 (13%)
51–250185 (20%)
251–500101 (11%)
501–1,00055 (6%)
1,001–5,000124 (13%)
5,001–10,00070 (7%)
10,001+224 (24%)
Share of companies with a recorded size, by employees.
No size recorded: 105
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Frequently asked questions
About the IBM Mainframe data on this page.
How many companies use IBM Mainframe?
Firmable holds confirmed IBM Mainframe detections for 1,046 distinct companies, 219 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use IBM Mainframe?
Veritas Capital, Diné Development Corporation and PTR Global are among the most prominent in the current set.
What industries use IBM Mainframe?
Information technology and services, financial services and professional and business services lead the set, across 19 industries in total.
What size companies use IBM Mainframe?
Adoption concentrates in the 10,001+ employee band, across the companies whose size is recorded.
Where are IBM Mainframe users based?
The United States, Australia, Canada and Indonesia account for most detections, across 13 countries.
How current is this data?
219 companies were confirmed in the last 90 days. Last detection 13 October 2026.
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