- L & A SECURITY GROUP LTD- 11347546 - Incorporated on 4 May 2018 
- R&S SECURITY GROUP LTDActive - Proposal to Strike off- 12539608 - Incorporated on 30 March 2020 
- SECURITY GROUP 9 LTDActive - Proposal to Strike off- 11944891 - Incorporated on 13 April 2019 
- C & C SECURITY GROUP LTDDisolved- 13912231 - Dissolved on 18 July 2023 
- GROUP 3 SECURITY LTDDisolved- 14300963 - Dissolved on 22 April 2025 
- 3D SECURITY GROUP LTDDisolved- 12892551 - Dissolved on 14 March 2023 
- A1 SECURITY GROUP LTDActive - Proposal to Strike off- 09485657 - Incorporated on 12 March 2015 
- O K SECURITY GROUP LTD- 14610923 - Incorporated on 23 January 2023 
- GROUP 4 SECURITY LTDDissolved- 06763887 - Dissolved on 15 November 2011 
- GROUP SECURITY LTDActive - Proposal to Strike off- 10395146 - Incorporated on 26 September 2016 
- SARGENT GROZNOV CORPORATION LIMITED- 14928289 - Incorporated on 12 June 2023 
- 24/7 SECURITY GROUP LTDActive - Proposal to Strike off- 10649651 - Incorporated on 3 March 2017 
- 101 SECURITY GROUP LTD- 12397822 - Incorporated on 10 January 2020 
- GROUP5SECURITY LTD- 13493010 - Incorporated on 5 July 2021 
- R1 SECURITY GROUP LTDDisolved- 13539650 - Dissolved on 31 January 2023 
- S.A GROUP SECURITY LTDDisolved- 13866042 - Dissolved on 27 June 2023 
- K9 SECURITY GROUP LTD- 13505122 - Incorporated on 12 July 2021 
- N S G SECURITY GROUP LTDActive - Proposal to Strike off- 06162914 - Incorporated on 15 March 2007 
- A.C.E K9 SECURITY GROUP LTDDisolved- 11356533 - Dissolved on 17 October 2023 
- UNIQUE SECURITY SERVICES LIMITEDActive - Proposal to Strike off- 09761053 - Incorporated on 3 September 2015