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Companies using Microsoft Defender ATP

As of 14 October 2026, Firmable tracks 2,932 companies across 13 countries running Microsoft Defender ATP. See who they are, and who to call.

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Companies using Microsoft Defender ATP

Showing 5 of 2.9K+ companies

Assured Guaranty

assuredguaranty.com · Insurance · 251–500 employees

Last seen 10 Jun 2025 The most recent date Firmable detected Microsoft Defender ATP at this company.

Decision makers · 230 on file Senior people on file at this company. Firmable holds their names, emails and mobiles.

VP/Software Development MobileEmail
VP, Technology Initiatives MobileEmail

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Signals Recent events at this company, such as a leadership change, funding or a new office.

Assured Guaranty Ltd. invests into Brightline Trains LLC $258M in post-petition funding. · 25 Sep 2026

Assured Guaranty Ltd. had revenue of $195M on Sep 25th '26. · 25 Sep 2026

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Global cellulose fibers

globalcellulosefibers.com · General manufacturing · 251–500 employees

Last seen 14 Apr 2026 The most recent date Firmable detected Microsoft Defender ATP at this company.

Decision makers · 187 on file Senior people on file at this company. Firmable holds their names, emails and mobiles.

IT Director Application Services Mobile
Director of Reliability Mobile

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Signals Recent events at this company, such as a leadership change, funding or a new office.

Hiring: Reliability Front Line Leader · 6 Oct 2026

Hiring: Mechanical Reliability Leader · 2 Oct 2026

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AEVEX Aerospace

aevex.com · Aerospace and defense manufacturing · 251–500 employees

Last seen 10 Jun 2025 The most recent date Firmable detected Microsoft Defender ATP at this company.

Decision makers · 151 on file Senior people on file at this company. Firmable holds their names, emails and mobiles.

Chief Engineer MobileEmail
Director, Engineering MobileEmail

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Signals Recent events at this company, such as a leadership change, funding or a new office.

Hired as Vice President of Government Affairs with 25+ years national security experience · 10 Aug 2026

AEVEX Corp. acquires Maritime Applied Physics Corp.. · 9 Sep 2026

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Monroe Capital LLC

monroecap.com · Investment management · 251–500 employees

Last seen 10 Jun 2025 The most recent date Firmable detected Microsoft Defender ATP at this company.

Decision makers · 194 on file Senior people on file at this company. Firmable holds their names, emails and mobiles.

VP, Data & Technology MobileEmail
Assistance Vice President - Network Engineer MobileEmail

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Signals Recent events at this company, such as a leadership change, funding or a new office.

Hired as director in New York · 30 Sep 2026

Monroe Capital LLC invested into 36th Street Capital Partners, LLC $60M in Class B Term Loan on Sep 17th '26. · 17 Sep 2026

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XTRA Lease LLC

xtralease.com · Logistics and supply chain services · 251–500 employees

Last seen 10 Jun 2025 The most recent date Firmable detected Microsoft Defender ATP at this company.

Decision makers · 186 on file Senior people on file at this company. Firmable holds their names, emails and mobiles.

Manager of Infrastructure MobileEmail
Region Vice President MobileEmail

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Signals Recent events at this company, such as a leadership change, funding or a new office.

XTRA Lease, Inc. invests into assets: 9.14-acre undeveloped puyallup site in the amount of $9.9M in Washington, United States, Northern America, Americas. · 14 Sep 2026

XTRA Lease LLC announces the launch of its new smart trailer technology, XTRA Intelligence, enhancing fleet visibility and control. · 28 Jul 2026

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Who uses Microsoft Defender ATP

A breakdown of the 2.9K+ companies running Microsoft Defender ATP.

Top industries

Information technology and services1K+
Financial services380
Professional and business services345
Industrial and manufacturing299
Construction and building130
Education and training111
Health and wellness97
Transport77

No industry recorded: 41

Company size

1–10100 (4%)
11–50197 (7%)
51–250560 (20%)
251–500326 (11%)
501–1,000294 (10%)
1,001–5,000666 (23%)
5,001–10,000215 (8%)
10,001+480 (17%)

Share of companies with a recorded size, by employees.

No size recorded: 94

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Frequently asked questions

About the Microsoft Defender ATP data on this page.

How many companies use Microsoft Defender ATP?

Firmable holds confirmed Microsoft Defender ATP detections for 2,932 distinct companies, 510 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.

Which companies use Microsoft Defender ATP?

Assured Guaranty, Monroe Capital LLC and Global cellulose fibers are among the most prominent in the current set.

What industries use Microsoft Defender ATP?

Information technology and services, financial services and professional and business services lead the set, across 19 industries in total.

What size companies use Microsoft Defender ATP?

Adoption concentrates in the 1,001-5,000 employee band, across the companies whose size is recorded.

Where are Microsoft Defender ATP users based?

The United States, Australia, Canada and Singapore account for most detections, across 13 countries.

How current is this data?

510 companies were confirmed in the last 90 days. Last detection 19 September 2026.

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