There have been 8 companies form in the week from 01-04-2026 to 07-04-2026 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 by day or by month in Cardiff. 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. However you can also use the wizard below to carry out live searches, free of charge,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.