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Companies House · Belfast

UK companies in Belfast

Belfast is the capital of Northern Ireland, with software, financial services, shipbuilding heritage and film production. 22,039 active companies have their registered office here, and 3,087 new ones were set up in the last twelve months.

At a glance

Key facts

  • 22,039 active companies are registered to a Belfast post town on the Companies House snapshot of August 2026.
  • 3,087 new companies started here in the last twelve months, about 257 a month, and 228 in August 2026.
  • The most common code is Retail sale via mail order houses or via the internet (SIC 47910), with 1,276 companies.
  • The busiest postcode districts are BT1, BT9, BT7, BT4.
Measured

New companies in Belfast

3,087 new companies were set up with a Belfast registered office in the last twelve full months, about 257 a month. 228 of them were set up in August 2026. That sits on top of 22,039 active companies already registered here.

Sept 25: 371Oct 25: 349Nov 25: 247Dec 25: 175Jan 26: 299Feb 26: 226Mar 26: 288Apr 26: 239May 26: 199Jun 26: 249Jul 26: 217Aug 26: 228
Sept 25 to Aug 26. Companies still on the register, counted from the Companies House snapshot.

What the new ones do: Retail sale via mail order houses or via the internet leads, with 456 new companies in the year.

  1. 47910Retail sale via mail order houses or via the internet456
  2. 62012Business and domestic software development127
  3. 68209Other letting and operating of own or leased real estate112
  4. 64209Activities of other holding companies n.e.c.108
  5. 70229Other management consultancy activities (not financial)106
For agencies and suppliers

Selling to new Belfast companies

A company in its first months is still choosing who it works with. Reaching it then, with a short email that names what it has just started, is often the easiest time to win them as a client.

  • Marketing agenciesA new company needs a website, a logo and its first customers, usually before it has picked anyone to help.
  • AccountantsEvery new company owes a first set of accounts and a confirmation statement, and many have no accountant yet.
  • IT and software firmsEmail, devices and security get set up in the first months, and the choices made then tend to stick.
  • Insurance brokersEmployers' liability, professional indemnity and van cover are bought early, often in a hurry.
  • RecruitersThe first hires come quickly once a new company wins work.

Leadistry reads the new Belfast registrations every morning, keeps the ones with a working website and a real email, and writes the first email for you to approve. The first 25 leads are free.

Get new Belfast companies as leads
Measured

The most registered SIC codes in Belfast

Counting active companies whose registered office is a Belfast post town, these are the codes that come up most often on the August 2026 Companies House snapshot. Retail sale via mail order houses or via the internet leads with 1,276 companies. It is worth reading against the sectors below: the authored view is what Belfast is known for, this is what its companies actually filed.

  1. 47910Retail sale via mail order houses or via the internet1,276
  2. 68209Other letting and operating of own or leased real estate1,028
  3. 98000Residents property management801
  4. 68100Buying and selling of own real estate721
  5. 99999Dormant Company664
  6. 70229Other management consultancy activities (not financial)607
  7. 64209Activities of other holding companies n.e.c.587
  8. 41100Development of building projects502

Pick a code, then narrow by postcode and date. Every company you pull carries a working website and a real email, and we never charge for the ones we cannot complete.

Why do these counts add up to more than the total?

A company may register up to four SIC codes and these counts include every position, so a business filed under two of them appears twice.

Where the volume sits

Dominant sectors in Belfast

SIC 47910, Retail sale via mail order houses or via the internetView SIC 47910→
1,276 active companies in Belfast
SIC 68209, Other letting and operating of own or leased real estateView SIC 68209→
1,028 active companies in Belfast
SIC 98000, Residents property managementView SIC 98000→
801 active companies in Belfast
SIC 68100, Buying and selling of own real estateView SIC 68100→
721 active companies in Belfast
SIC 99999, Dormant CompanyView SIC 99999→
664 active companies in Belfast
Search recipe

Postcode filter

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

BT1, BT9, BT7, BT4, BT5, BT2

The search returns companies with a registered office in any of these postcode areas. Add a SIC code filter from the table above to narrow by sector.

Answers

About Belfast on Companies House

How many companies are registered in Belfast?

22,039 active companies have a registered office in Belfast, counted from the Companies House snapshot of August 2026. Dissolved companies are not counted.

How many new businesses start in Belfast each month?

3,087 new companies were set up in Belfast in the last twelve full months, about 257 a month. 228 were set up in August 2026.

What do new Belfast companies do?

The most common code among companies set up in Belfast in the last year is Retail sale via mail order houses or via the internet (SIC 47910), with 456 of them. Next come Business and domestic software development and Other letting and operating of own or leased real estate.

How do I reach new Belfast companies before anyone else?

Set a Leadistry agent to the Belfast postcode districts (BT1, BT9, BT7) and the trades you sell to. Each morning it finds the new companies that match, checks each one has a working website and a real email, and writes the first email for you to read and approve.

Nearby and related cities: Newry · Derry · Lisburn · Armagh · Bradford · Cambridge · Derby · Preston · Every UK city

Companies House · Belfast

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