GovIntel publishes a free public page for each of these 3,575,266 companies, built from Companies House. Beyond registry identity, the records carry public contracts, filed annual accounts and adverse findings (insolvency, debarment, tax debt, statutory filing breaches). Every fact is attached using the identifier Companies House issues (Company number), never by matching company names.
Companies on this register
A sample of 96 of the 3,575,266. The full set is listed in the sitemap.