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Companies House · London

UK companies in London

London is the largest single concentration of UK companies, roughly 1 in 4 active UK ltds is registered to a London postcode. The mix skews heavily toward professional services (legal, accountancy, consultancy), finance, and tech, with fast-growing concentrations of e-commerce and media businesses. Companies House registrations in London also include many holding companies whose actual trading addresses sit elsewhere, Leadistry surfaces both.

At a glance

Key facts

  • London hosts approximately 25% of all active UK ltd companies
  • Central London (EC + WC postcodes) is dominated by professional services and finance, SIC 70229 alone accounts for over 80,000 registered companies
  • More UK companies incorporate in London each month than any other city, typically 10,000+ new ltds per month
Where the volume sits

Dominant sectors in London

SIC 70229, Management consultancyView SIC 70229 →
Highest-volume sector in central London postcodes
SIC 62012, Business and domestic software developmentView SIC 62012 →
SIC 69201, Accounting, auditing, and tax consultancyView SIC 69201 →
SIC 68320, Real estate management on a fee basisView SIC 68320 →
SIC 73110, Advertising agenciesView SIC 73110 →
Search recipe

Postcode filter

To target London on Leadistry, set the postcode prefix filter to:

EC, WC, E, N, NW, SE, SW, W, BR, CR, DA, EN, HA, IG, KT, RM, SM, TW, UB

Companies with registered offices in any of these postcode areas will be returned by the search. Combine with a SIC code filter from the table above for sub-sector targeting.

Answers

About London on Companies House

How many active UK companies are registered in London?

Approximately 1.2 million, roughly a quarter of the UK total. Leadistry indexes every one and refreshes daily from the Companies House register.

Can I filter to specific London boroughs or postcodes?

Yes, postcode prefix filtering supports any subset (e.g. EC for the City, E1–E20 for East London, SW for South West London). Combine with SIC for a sub-borough sector list.

Many London-registered companies don't actually trade in London, does that affect lead quality?

It can. A London-registered ltd may have its trading operations in (say) Manchester. Leadistry surfaces both the registered office and any later change-of-address filings, so you can flag mismatches before outreach.

Other UK cities: Manchester · Birmingham · Leeds · Bristol · Glasgow · Edinburgh · Liverpool · Newcastle upon Tyne · Sheffield

Companies House · London

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