All 731 codes in UK SIC 2007, searchable by what you actually do rather than by official wording, with the number of UK companies using each one.
15,957 business activities indexed 728 codes with activities listed Company counts from the October 2026 register
SIC 2007 divides every business into 21 lettered sections. They are uneven by design: L is exactly real estate, while M covers legal, accounting, architecture, engineering and advertising together.
Code descriptions are the ONS UK SIC 2007 structure. The 15,957 activities are the ONS alphabetical activity index, which is published as a separate spreadsheet and is the reason searching for barrister works here and not elsewhere. Company counts are the Companies House free register snapshot.
3 of the 731 codes have no activities listed, because they are administrative rather than a line of business: non-trading, dormant, and residents property management. ONS never indexed them, and we have not invented entries to fill the gap.