SIC code 70100 (Activities of head offices) is one of the most widely used business classifications in the UK, with 26,440 active companies registered under this code. It falls under Section M (Professional, scientific and technical activities) of the UK SIC 2007 classification system. With an average company age of 19.6 years, this is a well-established sector with mature businesses. The leading locations are WIGAN (174) and MAIDENHEAD (147).
See the full industry analysis on the Activities of head offices industry page.
SIC code 70100 stands for "Activities of head offices" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section M — Professional, scientific and technical activities. Companies use this code when registering with Companies House to indicate their primary business activity.
There are currently 26,440 active companies registered under SIC code 70100 in the UK, out of 28,567 total registrations (including dissolved companies).
The top locations for companies classified under SIC 70100 are: WIGAN (174), MAIDENHEAD (147). These areas represent the highest concentration of activities of head offices businesses in the UK.
Search, filter, and analyse 26,440 companies classified under this SIC code with AI-powered risk intelligence.
Data sourced from Companies House, HM Land Registry, FCA Register, and 50+ government databases. SIC classification follows the UK Standard Industrial Classification of Economic Activities 2007 (SIC 2007). Last updated: 2026-04-05.