Companies in Belfast

Key figures

Active companies

21,760

Incorporated in the last 12 months

2,865 (13.2%)

Average company age

9.8 years

Largest companies in Belfast by net assets

Ranked by net assets (total assets less total liabilities) in each company's latest accounts on file, for periods ending in the last 30 months, as at 10 October 2026. Net assets are not turnover and do not measure size of trade. Employees are shown where the accounts state an average number.

Only companies whose latest figures balance and pass our checks, in pounds and not dormant, are ranked, so this is the largest among those we can show reliably, not every company registered in Belfast. Figures are as filed with Companies House; CompanyStack does not audit them. A registered office is not always where a company trades.

Most common industries

Largest by reported turnover in Belfast

Ranked by turnover in each company's latest accounts on file, for periods ending in the last 30 months, as at 10 October 2026. Many small companies file accounts without turnover, so this ranks the companies that report it.

Only companies whose latest figures balance and pass our checks, in pounds and not dormant, are ranked, so this is the largest among those we can show reliably, not every company. Figures are as filed with Companies House; CompanyStack does not audit them.

Newest companies

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Filter companies by postcode, industry and financials with the CompanyStack API — for example GET https://api.companystack.co.uk/company/postcode/{postcode}.