SIC code 99999 (Dormant Company) is one of the most widely used business classifications in the United Kingdom, with 107,626 active companies registered under this code. This makes it one of the largest individual SIC categories in the UK economy. It falls under Section U (Activities of extraterritorial organisations) of the UK SIC 2007 classification system, which is used by Companies House to categorise all registered businesses.
See the full industry analysis on the Dormant Company industry page.
With a 89% survival rate, this sector shows strong business longevity. Only 560 of 121,318 companies registered under this code have dissolved, well below the UK average. The average company age is 13.5 years, indicating an established sector with a mix of long-running businesses and newer entrants. The sector is experiencing strong growth, with 35% of active companies formed since 2020 and 36% during the 2010s. This sustained formation rate points to continued demand for dormant company services. The leading locations for this sector are LONDON (20,318), MANCHESTER (3,209), KENILWORTH (2,044), which together account for 24% of active companies.
SIC code 99999 stands for "Dormant Company" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section U — Activities of extraterritorial organisations. Companies use this code when registering with Companies House to indicate their primary business activity. The code is required for annual confirmation statements and is used by HMRC, ONS, and other government bodies for statistical and regulatory purposes.
There are currently 107,626 active companies registered under SIC code 99999 in the UK, out of 121,318 total registrations. This gives a survival rate of 89%, meaning 11% of companies registered under this code have since dissolved. These figures are based on Companies House data and updated regularly.
The top locations for dormant company companies (SIC 99999) are: LONDON (20,318), MANCHESTER (3,209), KENILWORTH (2,044), BRISTOL (1,596), BIRMINGHAM (1,391). Geographic concentration can reflect local economic conditions, industry clusters, or proximity to key markets and supply chains.
The sector is growing: 35% of currently active SIC 99999 companies were formed since 2020, and 36% during the 2010s. This sustained formation rate indicates ongoing demand for dormant company services in the UK.
Companies classified under SIC 99999 have an average age of 13.5 years. This suggests a balanced sector with both established players and newer entrants. Notable companies include JEWSON LIMITED, LONDON AMBULANCE SERVICE LTD, PLUMBASE LIMITED.
Related SIC codes within the same division include: 99000 (Activities of extraterritorial organizations and bodies), 9999 (Dormant company, no significant accounting transactions). Companies may use multiple SIC codes if they operate across several of these related activities. When registering with Companies House, businesses should select the code that best represents their primary activity.
You can search for companies with SIC code 99999 (Dormant Company) using UVAGATRON's company explorer, which allows filtering by SIC code, location, and company status. Alternatively, Companies House offers a basic search on their website. Our platform adds risk intelligence, director networks, and signals from 50+ government databases to each company record.
Search, filter, and analyse 107,626 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: 2026-04-17.