A breakdown of the 1K+ companies running Windows NT.
Top industries
Information technology and services300
Professional and business services125
Industrial and manufacturing103
Health and wellness80
Financial services75
Education and training65
Construction and building45
Media and telecommunications29
No industry recorded: 29
Company size
1–1059 (7%)
11–50110 (12%)
51–250148 (17%)
251–500110 (12%)
501–1,00069 (8%)
1,001–5,000166 (19%)
5,001–10,00065 (7%)
10,001+161 (18%)
Share of companies with a recorded size, by employees.
No size recorded: 122
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Frequently asked questions
About the Windows NT data on this page.
How many companies use Windows NT?
Firmable holds confirmed Windows NT detections for 1,010 distinct companies, 217 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Windows NT?
Indonesia Commodity & Derivatives Exchange (ICDX), Georgia System Operations Corporation and Westinghouse Electric Company are among the most prominent in the current set.
What industries use Windows NT?
Information technology and services, professional and business services and industrial and manufacturing lead the set, across 19 industries in total.
What size companies use Windows NT?
Adoption concentrates in the 1,001-5,000 employee band, across the companies whose size is recorded.
Where are Windows NT users based?
The United States, Canada, Australia and the Philippines account for most detections, across 13 countries.
How current is this data?
217 companies were confirmed in the last 90 days. Last detection 13 October 2026.
