Companies within Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield

Newly Formed Companies in
Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield
this week

There have been 10 companies formed in the week from 28-10-2026 to 04-11-2026 within the CF3 postcode district (Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield in Cardiff). Usually over 2500 companies get formed every working day across the country. If you would prefer to analyse by region, rather than this postal district, you can check how many companies are formed in Cardiff.

The geography of CF3 is anchored by Rumney, Trowbridge, Llanrumney and nearby places such as St Mellons, making the district more specific than the broader postcode area that surrounds it. Taken together, Rumney, Trowbridge, Llanrumney and St Mellons give CF3 a more varied footprint than a single-place district.

For CF3, the local setting is important: Cardiff's districts reflect the role of Wales's capital, with government, universities, sport, media, retail and waterfront regeneration all part of the city's identity.

By company count, CF3 sits around the middle of the national spread, ranked 581st out of 3,113 districts with 2,698 companies as of June 2026. UK company data for CF3 helps connect the named localities with recent company formation activity. For CF3, the company count is best read alongside the named places rather than as a claim about how businesses operate.

Below are just a small sample of the companies formed (with the numeric parts of the address redacted with an X and not showing the postcode, so we are not advertising peoples full addresses online) but allows you to see where some of the companies have been formed. Our newly formed companies wizard in our Dashboard allows you to filter by a range of options free of charge to get an idea of quantities, prior to deciding to purchase. We supply the full company details lodged when they filed their company when you have decided on your filter selection and choose to purchase.

Incorp Date	Categories	Location
4th Nov	Remediation activities and other waste management services	X Kewstoke Avenue Llanrumney Cardiff
3rd Nov	Freight transport by road	XX Greenway Road Rumney Cardiff
3rd Nov	Other letting and operating of own or leased real estate	XX The Grove Rumney Cardiff
3rd Nov	Activities of other holding companies n.e.c.	XX The Grove Rumney Cardiff
2nd Nov	Construction of domestic buildings Other building completion and finishing	Oak Tree Stables Tyla Lane, Old St. Mellons Cardiff
2nd Nov	Renting and leasing of construction and civil engineering machinery and equipment Renting and leasing of other machinery, equipment and tangible goods n.e.c.	Suite Xd Building X Eastern Business Park St Mellons Cardiff United Kingdom
2nd Nov	Other construction installation Roofing activities	X Jasmine Drive St. Mellons Cardiff
2nd Nov	Retail sale via mail order houses or via Internet	XX Rhodfa Leonard Cardiff
31st Oct	Buying and selling of own real estate Other letting and operating of own or leased real estate	Melrose Newport Road Cardiff
29th Oct	Sale of used cars and light motor vehicles	XX Kember Close St. Mellons Cardiff