Company lists · Data refreshed September 2026

Top 25 Private security and protection companies based in the United Kingdom

RevenueBase identified 2,770 company matches for private security and protection companies associated with the United Kingdom as of September 2026 and tracks 129,761 professional contacts across them, including 8,223 with verified work emails. London is the largest hub.

This list covers company matches for private security and protection companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 27, 2026 How this list was built
2,770Companies
129,761Contacts tracked
8,223Verified emails
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The 25 largest private security and protection companies based in the United Kingdom

Ranked by team size
Top 25 of 2,770 company matches for private security and protection companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 27, 202610001+79,699 contacts →

Exact match

“G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchStaines, United KingdomHQ recorded Sep 27, 202610001+6,169 contacts →

Exact match

“Making the world a safer place.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 27, 20265,001-10,0001,451 contacts →

Exact match

“TSS is the UK’s largest retail specialist security company, employing over 7500+ security personnel.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchLeicester, United KingdomHQ recorded Sep 27, 20261,001-5,0001,265 contacts →

Exact match

“With over 45 years of experience, Showsec is a leading name in the UK’s live event security sector.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,000919 contacts →

Exact match

“CIS Security is an independent security company equipped to help customers to solve the complex challenges in today’s digital, connected and regulated business world.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchLeeds, United KingdomHQ recorded Sep 27, 20261,001-5,000884 contacts →

Exact match

“Professional Security is one of the UK’s leading providers of security services, specialising in the hospitality and events sectors.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchNorthampton, United KingdomHQ recorded Sep 27, 20265,001-10,000852 contacts →

Exact match

“VSG are one of the UK's leading security solutions providers with a heritage in manned guarding.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,000847 contacts →

Exact match

“Corps Security - experts in security with social value Built on over 165 years of experience, Corps provides specialist security services, across the UK, to ensure the safety of…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchUnited KingdomHQ recorded Sep 27, 20261,001-5,000765 contacts →

Exact match

“Ranked in the top 1% of UK security companies, as approved by the Security Industry Authority, SecuriGroup is an award-winning security company, specialising in the provision of…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchManchester, United KingdomHQ recorded Sep 27, 20261,001-5,000649 contacts →

Exact match

“Established in 2003, FGH are trusted by international brands to keep their assets and millions of people safe every year.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,000597 contacts →

Exact match

“Part of ICTS Europe Group, ICTS UK & Ireland is a professional services firm which has been specialised in security risk for the past 39+ years.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchCirencester, United KingdomHQ recorded Sep 27, 20261,001-5,000422 contacts →

Exact match

“Unlike traditional security providers, we're redefining what protection means in today's world.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,000419 contacts →

Exact match

“Ward is an award winning, privately owned business, providing bespoke risk and security solutions including protective security personnel, explosive search dogs, narcotic search…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchSwindon, United KingdomHQ recorded Sep 27, 2026501-1,000392 contacts →

Exact match

“SSGC is a leading innovator in the Manned Guarding industry, specialising in the application of new technology to improve the performance of its Management team, deployed staff…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchManchester, United KingdomHQ recorded Sep 27, 2026501-1,000389 contacts →

Exact match

“Mitie Fire & Security is part of Mitie, the UK’s leading facilities management and professional services company, delivering integrated fire and security solutions that protect…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchStratford, United KingdomHQ recorded Sep 27, 20261,001-5,000350 contacts →

Exact match

“STM Group (UK) Limited is an award-winning company, providing bespoke manpower service solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchBraintree, United KingdomHQ recorded Sep 27, 20261,001-5,000326 contacts →

Exact match

“Established in 1993, with commitment to our customers and staff alongside a strong ethos and standards driven approach, Regency Security is now the largest provider of door…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchUxbridge, United KingdomHQ recorded Sep 27, 20261,001-5,000307 contacts →

Exact match

“We are a leading provider of site security, vacant property, and people protection services across the UK and Europe.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchHarlow, United KingdomHQ recorded Sep 27, 20261,001-5,000285 contacts →

Exact match

“SES Group was founded in 1998 by Dr Tony Ball and rebranded as SES Group in 2014.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,000272 contacts →

Exact match

“VPS is Europe’s leading temporary security specialist, protecting vacant properties, remote sites, construction and infrastructure projects with tailored, risk-based security…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchLeeds, United KingdomHQ recorded Sep 27, 2026501-1,000246 contacts →

Exact match

“First Response Group (FRG) is one of the leading security, risk and FM providers in the UK delivering manned security, technology solutions, building management and vacant…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,000232 contacts →

Exact match

“Established in 1994, Interr is a specialist agency providing intelligent guarding, reception, remote monitoring & response and front of house solutions within the retail, hotel…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchShirley, United KingdomHQ recorded Sep 27, 20261,001-5,000226 contacts →

Exact match

“MAN Commercial is a leading security company and Training Academy based in Solihull, West Midlands.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchBexleyheath, United KingdomHQ recorded Sep 27, 2026501-1,000206 contacts →

Exact match

“Wise Security is a trusted provider of professional security, crowd management, and safety solutions for high‑profile events, venues, and organisations across the UK.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchWoking, United KingdomHQ recorded Sep 27, 2026201-500205 contacts →

Exact match

“Pilgrims are a global security, risk management and service support company that identifies and manages risks for clients across all sectors, including oil & gas, telecoms…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 2,770 private security and protection companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 8,223 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Private security and protection companies based in the United Kingdom at a glance

As of Sep 27, 2026
6.3%Verified-email coverage
46.8Average contacts per company
11-50Median size (employees)
24.0%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
970
11-50
859
51-200
636
201-500
179
501-1,000
47
1,001-5,000
45
5,001-10,000
6
10001+
7

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 2,770 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “private security and protection companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 8,223 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “private security and protection companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many private security and protection companies are there based in the United Kingdom?

RevenueBase identified 2,770 company matches for private security and protection companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

G4s tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most private security and protection companies?

London leads with 666 company records, followed by Manchester (73) and Birmingham (71).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 8,223 professional contacts with verified work emails tracked across these 2,770 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.