Investigation activities (SIC code 80300)
Investigation activities is UK SIC code 80300. It sits in division 80 (Security and investigation activities) of the SIC 2007 list. On the August 2026 Companies House register, 1,842 active UK companies list 80300 among their SIC codes. 993 of them list it first. That makes it the third most used code in its division.
1,842active UK companies list SIC 80300 among their codes on the public recordCompanies House · counts as of August 2026
SIC 80300 in numbers
1,842 companies is 0.04 per cent of the 5,190,464 active companies on the UK register. 80300 is the third most used of the 3 codes we track in division 80.
Only 993 of the 1,842 put it first. The other 849, 46 per cent, list it behind another code, so a search on the first code alone would miss most of them. Match any of the four positions and tighten it with a second filter.
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN (WHERE THE PAPERWORK SITS, NOT NECESSARILY THE WORK) · COMPANIES HOUSE PUBLIC RECORD, AUGUST 2026
London is the largest cluster at 29 per cent and the top five post towns hold 34 per cent, so the other 66 per cent sit across the rest of the country. A regional filter narrows the list without gutting it.
A worked example: 80300, registered office in London, incorporated in the last ninety days, from a pool of 1,842. Each lead you get arrives with a working website and a real email, and the director's name when the record has one. If we cannot complete one, you pay nothing.
SIC 80300 companies, as leads
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Division 80 holds two very different populations. Code 80100, private security activities, covers manned guarding, door supervision and close protection.
Related SIC codes
How to read SIC 80300
SIC 80300 reads as division 80 (security and investigation activities), group 803, class 8030, then the full five digits, inside section N, administrative and support service activities. A company picks its own codes, up to four, and Companies House does not check them, so 80300 is the company's own description of what it does, and 993 list it first where 1,842 list it anywhere.
Who sells into division 80
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.
About SIC 80300
How many UK companies use SIC code 80300?
1,842 active UK companies list 80300 (Investigation activities) among their registered SIC codes. Each company may register up to four. Of those, 993 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.
Find UK SIC 80300 companies
Filter Companies House by this code. Each lead arrives with a working website and a real email, or you pay nothing. 100 free leads, no card.
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