UK companies in Cardiff
Cardiff is the capital of Wales, with media, finance, public sector suppliers and a large professional services base. 28,444 active companies have their registered office here, and 4,373 new ones were set up in the last twelve months.
Key facts
- 28,444 active companies are registered to a Cardiff post town on the Companies House snapshot of August 2026.
- 4,373 new companies started here in the last twelve months, about 364 a month, and 283 in August 2026.
- The most common code is Other letting and operating of own or leased real estate (SIC 68209), with 1,618 companies.
- The busiest postcode districts are CF14, CF24, CF10, CF11.
New companies in Cardiff
4,373 new companies were set up with a Cardiff registered office in the last twelve full months, about 364 a month. 283 of them were set up in August 2026. That sits on top of 28,444 active companies already registered here.
What the new ones do: Retail sale via mail order houses or via the internet leads, with 456 new companies in the year.
Selling to new Cardiff 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 Cardiff 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 Cardiff companies as leadsThe most registered SIC codes in Cardiff
Counting active companies whose registered office is a Cardiff post town, these are the codes that come up most often on the August 2026 Companies House snapshot. Other letting and operating of own or leased real estate leads with 1,618 companies. It is worth reading against the sectors below: the authored view is what Cardiff is known for, this is what its companies actually filed.
- 68209Other letting and operating of own or leased real estate1,618
- 47910Retail sale via mail order houses or via the internet1,478
- 68100Buying and selling of own real estate1,424
- 70229Other management consultancy activities (not financial)931
- 82990Other business support service activities n.e.c.743
- 64209Activities of other holding companies n.e.c.675
- 98000Residents property management666
- 62012Business and domestic software development574
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.
Dominant sectors in Cardiff
Postcode filter
To target Cardiff on Leadistry, set the postcode prefix filter to:
CF14, CF24, CF10, CF11, CF23, CF3The 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.
About Cardiff on Companies House
How many companies are registered in Cardiff?
28,444 active companies have a registered office in Cardiff, counted from the Companies House snapshot of August 2026. Dissolved companies are not counted.
How many new businesses start in Cardiff each month?
4,373 new companies were set up in Cardiff in the last twelve full months, about 364 a month. 283 were set up in August 2026.
What do new Cardiff companies do?
The most common code among companies set up in Cardiff in the last year is Retail sale via mail order houses or via the internet (SIC 47910), with 456 of them. Next come Buying and selling of own real estate and Other letting and operating of own or leased real estate.
How do I reach new Cardiff companies before anyone else?
Set a Leadistry agent to the Cardiff postcode districts (CF14, CF24, CF10) 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: Swansea · Newport · Wrexham · St Asaph · Coventry · Brighton and Hove · Milton Keynes · Southampton · Every UK city
Find Cardiff leads
25 free leads. No credit card. Cancel any time.
✓ No card · ✓ 25 free leads · ✓ Cancel anytime