United Kingdom— GB

Security companies in United Kingdom — browse 33.4K records

Browse 33,419 security companies in United Kingdom — registry-sourced from Companies House, scoped to NACE 80. Each record carries up to up to 500 firmographic attributes — from Companies House Number and registered address to revenue, headcount and corporate group structure. The largest by revenue are G4S LIMITED ($6.5B), G4S SECURE SOLUTIONS (UK) LIMITED ($641M) and WILSON JAMES LIMITED ($484M).

33.4K

Security companies

NACE codes

2.9K

Group-linked records

Top companies

Largest security companies in United Kingdom (2026)

The largest security companies in United Kingdom by revenue are G4S LIMITED ($6.5B), G4S SECURE SOLUTIONS (UK) LIMITED ($641M) and WILSON JAMES LIMITED ($484M). The directory below ranks them — sort any column, or filter by sub-sector, company size and region.

Last updated June 2026.

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Every UK security companies record with all attributes, by API, bulk export or CRM enrichment.

Showing 25 of 33,419 UK security companies· click a column to sort, or a company for its full record

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Private security activities	Queen's Park	Broadway 50	419,544	$6.5B	2004	04992207	Corporation	823
Private security activities	Queen's Park	Broadway 50	13,153	$641M	1972	01046019	Corporation	823
Private security activities	Westcliff-on-Sea	London Road 648	6,173	$484M	1988	02269560	Corporation	9
Private security activities	Queen's Park	Broadway 50	3,841	$276M	1994	03333860	Corporation	823
Private security activities	Holborn	Tavistock Square	4,717	$256M	1987	02143366	Corporation	6
Private security activities	Highams Park	Hickman Avenue 18	7,379	$249M	1989	02426982	Corporation	823
Private security activities	Hither Green	Lewisham High Street 418	3,343	$223M	2005	05430887	Corporation	3
Private security activities	Hither Green	LEWISHAM HIGH STREET 418	3,340	$223M	1981	01555444	Corporation	3
Private security activities	Muswell Hill	Station Road 50	3,226	$199M	2021	13249975	Corporation	13
Private security activities	Castlefield	Deansgate 378	3,226	$199M	2022	14218852	Corporation	13
Private security activities	Finsbury	Cowcross Street 85	3,326	$180M	2011	Not available	Proprietorship	Not available
Private security activities	Muswell Hill	Station Road 50	2,721	$169M	2016	10259434	Corporation	13
Private security activities	Lodge Hill	WHARFSIDE STREET 199	783	$167M	2020	12608059	Corporation	Not available
Private security activities	Finsbury	Cowcross Street 85	3,031	$152M	1997	03473589	Corporation	18
Private security activities	Queen's Park	Broadway 50	2,111	$142M	1939	00354883	Corporation	823
Private security activities	Luton	THE BOULEVARD 251	4,053	$140M	1991	02654100	Corporation	19
Security systems service activities	Witham	SWANBRIDGE INDUSTRIAL PARK 4	538	$127M	2019	13048877	Corporation	26
Private security activities	Glasgow	Bath Street 300	1,200	$113M	2003	SC243826	Corporation	13
Private security activities	Clyst Saint Mary	Oil Mill Lane	515	$112M	1997	03304503	Corporation	48
Private security activities	Uxbridge	Cricket Field Road	1,621	$107M	1990	02476859	Corporation	36
Private security activities	Luton	Parkland Square	1,669	$106M	2010	07317266	Corporation	14
Private security activities	Monument-Aldgate-Fenchurch Street-Tower Hill	Devonshire Square 9	1,401	$101M	2010	07479524	Corporation	62
Security systems service activities	Dulwich	London Bridge Street 32	571	$98M	2004	05239777	Corporation	56
Private security activities	Bestwood	BULL CLOSE 4	1,085	$98M	1996	03200432	Corporation	696
Private security activities	Greetland	Calder Street	250	$95M	1860	01101020	Corporation	5

This is a sample. The full database holds 33,419 UK security companies, each with every attribute in the dictionary below.

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Database overview

Security companies in United Kingdom — database overview

Distributions across all 33,419 security companies in United Kingdom — registry-sourced from Companies House and refreshed daily.

Company size (by employee band)

1–9
90%
10–49
8%
50–199
2%
200–999
1%
1,000+
0%

Sub-sector breakdown (NACE)

Private security activities67%
Security systems service activities33%

Regional distribution

London
29%
Manchester, Greater Manchester
5%
Essex
3%
Kent
3%
Birmingham, West Midlands
2%
Hertfordshire
2%
Other
56%

Revenue (USD)

Less than $100K
59%
$100K – $1M
35%
$1M – $10M
5%
$10M – $100M
1%
$100M+
0%

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These distributions are computed from the full UK security companies database, not the sample above.

Data coverage

What data is available on security companies in United Kingdom

United Kingdom business database

Firmographics

Legal name, registered address, NACE sub-sector, legal form, founding year and website. Every record is keyed to its Companies House Number — the stable Companies House identifier that survives name changes and rebrands, making it the most reliable CRM deduplication key for United Kingdom data.

Points of interest

Each company is geocoded to GPS coordinates covering its registered seat and operating locations across United Kingdom, with a precision level on every point — useful for territory planning and proximity targeting.

Tax IDs

Records carry the Companies House Number and, where applicable, the VAT registration number, with a flag for when the two coincide. These are the cleanest match keys for enriching lists and cross-referencing against the national tax authority and your CRM.

Group structure

InfobelPRO resolves the corporate hierarchy — parent, subsidiaries and the size of the worldwide corporate family — so sales and compliance teams can see who controls an entity before engaging or onboarding it.

Financials

Annual revenue in local currency, EUR and USD, employee headcount and founding year, with multi-year history where filed. Figures are sourced from Companies House filings and carry an Actual-or-Modeled reliability flag.

Data dictionary

Every attribute in the UK security companies dataset

The full field catalogue behind each record. Contact data (email, phone, executives) is part of the licensed dataset but is never displayed on this page.

Identity

companyName: Registered legal name.
businessName: Trading / commercial name where it differs from the legal name.
tradeName: Additional registered trade name.
nationalID: Companies House Number — the official Companies House company identifier.
nationalIDIsVat: Flag indicating whether the national ID doubles as the VAT number.

Location

addressStreet: Registered street address.
postCode: Postal code.
city: City / locality.
province: Region / province / county.
country: Country (ISO).
longitude / latitude: Geocoded coordinates of the location.
geoLevel: Precision level of the geocode.

Web

website: Primary corporate URL.
webDomain: Normalised root domain.
websiteStatusFlag: Live / dead / redirect status from the last crawl.
websiteCrawlDate: Date the website was last checked.

Activity

altInternationalCode01–06: Up to six NACE Rev. 2 activity codes plus labels.
internationalCode: US SIC code.
localCode: National activity code.
infobelCode: Proprietary Infobel activity code.

Size

employeesHere: Headcount at this location.
employeesTotal: Total headcount across the entity (with Actual / Modeled flag).

Financials

salesVolume: Annual revenue in local currency.
salesVolumeEuros: Annual revenue converted to EUR.
salesVolumeDollars: Annual revenue converted to USD — shown in the table.
currency: Reporting currency.
yearStarted: Year the company was founded.
financialHistory: Multi-year revenue history where filed.

Status & legal

statusCodeName: HQ, branch or single-location indicator.
legalStatusCodeDescription: Legal form (e.g. limited company / corporation).

Group structure

familyMembers: Number of entities in the worldwide corporate family.
subsidiaryIndicator: Whether the entity is a subsidiary.
parentLinkage: Link to the parent company.
domesticLinkage / globalLinkage: Domestic and global ownership links.
hierarchyCode: Position within the corporate hierarchy.

Source comparison

Companies House vs InfobelPRO

Companies House gives you legal registration data. InfobelPRO adds the commercial intelligence sales, marketing and compliance teams actually need.

Attribute	Companies HouseFree official registry	InfobelPRO
Companies House Number	Yes	Yes — on 99.9% of records
Legal name & registered address	Yes	Yes
Company status (HQ / branch)	Yes	Yes — daily sync
NACE sub-sector classification	Yes	Yes — up to 6 codes
Annual revenue (local / EUR / USD)	Filings only	Yes — multi-currency
Employee count	No	Yes
Decision-maker contacts	No	Yes — licensed
Geocoded coordinates	No	Yes
Corporate group structure	Filings only	Yes — full hierarchy
API access	No	Yes — REST API
Bulk export (CSV / JSON / Parquet)	No	Yes
Update frequency	Periodic (filings)	Daily sync

FAQ

Frequently asked questions

By the revenue shown in the directory above, the largest security companies in United Kingdom include G4S LIMITED ($6.5B), G4S SECURE SOLUTIONS (UK) LIMITED ($641M) and WILSON JAMES LIMITED ($484M). Sort the Revenue column or filter by sub-sector, size and region to explore the full ranking.

InfobelPRO lists 33,419 security companies registered in United Kingdom, classified under NACE 80, sourced from Companies House. The directory covers all registered entities in scope, not a sampled subset.

London holds the largest share with 29% of United Kingdom's security companies, followed by Manchester, Greater Manchester (5%) and Essex (3%). The region chart above shows the full distribution.

Security companies in United Kingdom are classified under NACE 80 — 2 sub-sector codes appear in this segment. Each record can carry up to six NACE Rev. 2 activity codes, plus a US SIC code and the national activity code.

Core firmographics come directly from Companies House and are refreshed daily — new incorporations, address changes and status updates flow through within 24 hours of publication. Revenue and employee figures track annual report filings and carry an Actual-or-Modeled reliability flag.

Yes. InfobelPRO combines registry-sourced firmographics with licensed contact data, processed under GDPR Article 6(1)(f) — legitimate interest and ICO guidance. Individual opt-outs are honoured and compliance documentation is available on request.

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Explore more

Discover more segments in United Kingdom

Related directories

See all company directories in United Kingdom, explore the full United Kingdom business database In the US classification, related SIC codes include SIC 7381 — Detective, Guard, and Armored Car Services, SIC 7382 — Security Systems Services and SIC 4499 — Water Transportation Services, Not Elsewhere Classified., or see how United Kingdom fits into the wider Europe business database.