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 8 companies formed in the week from 15-07-2026 to 22-07-2026 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
22nd Jul	Management consultancy activities other than financial management Other professional, scientific and technical activities n.e.c.	XX Whitehall Parade Caerdydd
22nd Jul	Advertising agencies Renting and leasing of media entertainment equipment	XXXa The Avenue Rumney Cardiff Wales
21st Jul	Manufacture of other furniture Joinery installation Other building completion and finishing specialised design activities	XXX Ridgeway Road Cardiff
20th Jul	Electrical installation	Fairway House Links Business Park St. Mellons Cardiff
17th Jul	Buying and selling of own real estate Real estate agencies	X Kingfisher Close Cardiff
16th Jul	Motion picture production activities	Great Point Studios Wentloog Avenue St Mellons Cardiff
16th Jul	Retail sale via mail order houses or via Internet	XX Linden Grove Caerdydd
16th Jul	Buying and selling of own real estate Other letting and operating of own or leased real estate Management of real estate on a fee or contract basis	XXX Mortimer Avenue Old St. Mellons Cardiff