UK SIC 2007 · 80100
Private security activities (SIC code 80100)
Private security activities is UK SIC code 80100. It sits in division 80 (Security and investigation activities) of the SIC 2007 list. On the August 2026 Companies House register, 14,465 active UK companies list 80100 among their SIC codes. 11,384 of them list it first. That makes it the most used code in its division.
Division 80: Security and investigation activities
Division 80 holds two very different populations. Code 80100, private security activities, covers manned guarding, door supervision and close protection. It is a labour-heavy trade where contracts and licensed staff are the whole business. Code 80200 covers security systems services. Those firms install and monitor alarms, CCTV and access control, and they behave more like specialist electrical contractors. The two buy in completely different ways, so they should rarely get the same emails. Both groups contain many small subcontractors built around one client.
Related SIC codes
Who prospects SIC 80100 companies
Guarding firms under 80100 attract workforce management software vendors, payroll and invoice finance providers, and insurers. SIA licensing consultants chase new incorporations before the first contract lands. Systems installers under 80200 draw a different set: wholesale equipment distributors, monitoring station partners, and the accreditation bodies whose inspectorate badges unlock commercial work. In both camps a big contract win forces sudden hiring or stock buying. So visible growth is the strongest buying signal here. Filing deadlines point to thinly-run firms that need back-office help.
Lead generation for commercial & B2B services →How to read SIC 80100
SIC 80100 is a five-digit code, and the digits are not arbitrary. The first two, 80, are the division, security and investigation activities. Add the third and you have group 801; the fourth narrows it to a class, and the fifth to the subclass, which is the level Companies House actually asks a company to pick. The whole division sits under section N, administrative and support service activities, the broadest tier there is. Reading a code left to right therefore goes from a whole sector down to one activity.
More on how SIC 80100 is built
A company chooses its own codes when it incorporates and can change them on any confirmation statement. It may list up to four, and Companies House does not check whether they are right. That is why 80100 is worth reading as a claim the company made about itself rather than as a verified fact, and why the first-position and any-position counts above differ.
Measured on the August 2026 register, the busiest registered-office post towns for 80100 are London (3,243), Birmingham (442), Manchester (420), Ilford (349) and Luton (202). Those are registered-office locations, which is where the paperwork sits rather than necessarily where the work happens, so treat them as where to start looking rather than as a service area.
Using SIC 80100 as a filter
14,465 companies is 0.28 per cent of the 5,190,464 active companies on the UK register, and ranks 80100 most used of the 3 codes we track in division 80. That is the pool before any filter. Whether it is a big market for you depends on what you sell, but it is the number every other filter on this page cuts down from.
More on filtering by SIC 80100
11,384 companies put 80100 first and a further 3,081, 21 per cent, list it in one of their other three SIC slots. That gap is the difference between a tight list and a broad one. First-code-only is the safer filter when you are writing to them; matching any position is worth it when you need the volume.
These companies are spread out. London is the largest single cluster at 22 per cent and the top five post towns together hold only 32 per cent, so the remaining 68 per cent sits across the rest of the country. A regional filter narrows this list without gutting it, which makes it a reasonable code to work territory by territory.
In practice the code on its own is rarely the whole filter. Pair 80100 with an incorporation date to catch companies in their first months, when they are still choosing suppliers, or with a filing deadline to reach them while the year end is on their mind. A worked example for this code: 80100, registered office in London, incorporated in the last ninety days, which turns a 14,465 company pool into a list you can write to in an afternoon. Add the poor-website filter if what you sell is a website, or a recent change of officer if you sell to whoever just took the job. Every company you pull carries the Companies House record, the director's name, a verified website and a verified email, and the ones we cannot complete are not charged.
Where SIC 80100 clusters in the UK
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN · COMPANIES HOUSE REGISTER, AUGUST 2026
SIC 80100 companies, as leads
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About SIC 80100
How many UK companies use SIC code 80100?
14,465 active UK companies list 80100 (Private security activities) among their registered SIC codes. Each company may register up to four. Of those, 11,384 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Does registering a security SIC code mean the company holds SIA licences?
No. SIC codes are self-declared at Companies House and nobody vets them. Security Industry Authority licensing applies to individuals doing licensable roles, such as guarding and door supervision. The voluntary Approved Contractor Scheme applies to businesses. A company can sit under 80100 and hold no licences at all. Check SIA status separately from the public record.
Which SIC code should a CCTV and alarm installation business use?
Use 80200, security systems service activities. It is the standard fit for installing and monitoring alarms, CCTV and access control. Some installers also register an electrical installation code from division 43. Companies House permits that, since each company may hold up to 4 codes. Set codes at incorporation and change them on the confirmation statement (CS01). No approval is needed either way.
Find UK SIC 80100 companies
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