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 14-09-2026 to 21-09-2026 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
21st Sep	Other software publishing Business and domestic software development	Above Willis Systems, Lamby Industrial Park, Wentloog Avenue, Cardiff Wales
21st Sep	Pre-press and pre-media services	Fairway House Links Business Park Fortran Road St. Mellons Cardiff
20th Sep	Activities of construction holding companies	Unit WX-WX Capital Business Park Cardiff
18th Sep	Other construction installation Joinery installation Other specialised construction activities n.e.c. Retail sale via mail order houses or via Internet	XX Brython Drive St. Mellons Cardiff
18th Sep	Wholesale of fruit and vegetable juices, mineral water and soft drinks Wholesale of wine, beer, spirits and other alcoholic beverages	Suite Xd Building X Eastern Business Park St Mellons Cardiff
17th Sep	Repair and maintenance of aircraft and spacecraft Electrical installation Other specialised construction activities n.e.c. Other engineering activities	X Began Road Old St. Mellons Cardiff
16th Sep	Other specialised construction activities n.e.c.	XX Brynbala Way Caerdydd
16th Sep	Take-away food shops and mobile food stands Event catering activities	Fairway House Links Business Park St Mellons Cardiff
15th Sep	Manufacture of household and sanitary goods and of toilet requisites	XX Browning Close Caerdydd
15th Sep	Retail sale via mail order houses or via Internet	Suite Xd Building X Eastern Business Park St Mellons Cardiff