SIC code 71129 (Other engineering activities) is one of the most widely used business classifications in the UK, with 27,180 active companies registered under this code. It falls under Section M (Professional, scientific and technical activities) of the UK SIC 2007 classification system. The average company age is 7.8 years. The leading locations are WARRINGTON (572) and ABERDEEN (413).
See the full industry analysis on the Other engineering activities industry page.
SIC code 71129 stands for "Other engineering activities" 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 27,180 active companies registered under SIC code 71129 in the UK, out of 30,997 total registrations (including dissolved companies).
The top locations for companies classified under SIC 71129 are: WARRINGTON (572), ABERDEEN (413), MIDDLESBROUGH (283). These areas represent the highest concentration of other engineering activities businesses in the UK.
Search, filter, and analyse 27,180 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.