- SAM HORNER MEDIA LTD- 16538157 - Incorporated on 24 June 2025 
- HORNER ASSOCIATES LIMITED- 03940919 - Incorporated on 6 March 2000 
- BROUGH & HORNER LIMITEDDisolved- 02107637 - Dissolved on 22 October 2024 
- HORNER PHARMACY LIMITED- NI056317 - Incorporated on 24 August 2005 
- SMITH & HORNER, LIMITED- SC034925 - Incorporated on 25 February 1960 
- RACHEL HORNER LIMITED- 04702145 - Incorporated on 19 March 2003 
- HAWKES & HORNER LIMITED- 04756004 - Incorporated on 7 May 2003 
- HORNER CONSULTING LIMITEDActive - Proposal to Strike off- 09376262 - Incorporated on 6 January 2015 
- CONGREVE HORNER LLP- OC411649 - Incorporated on 4 May 2016 
- HORNER HOLDINGS LTD- 11697935 - Incorporated on 27 November 2018 
- HORNER ELECTRICAL LIMITED- 11880461 - Incorporated on 13 March 2019 
- SHAUNEEN HORNER LTD- NI728718 - Incorporated on 18 April 2025 
- MR.MR. LTDDisolved- 14252327 - Dissolved on 5 December 2023 
- MR MR2 LTD- 11218539 - Incorporated on 21 February 2018 
- HORNER BLAKEY LIMITED- 05630996 - Incorporated on 21 November 2005 
- HORNER DEVELOPMENTS LIMITEDActive - Proposal to Strike off- 05852526 - Incorporated on 20 June 2006 
- JASON HORNER LIMITEDDissolved- 06414478 - Dissolved on 12 September 2017 
- JACK HORNER LIMITED- 07671257 - Incorporated on 15 June 2011 
- HORNER CONSULTANCY LTD- 08877542 - Incorporated on 5 February 2014 
- HORNER MOTORSPORT LTDActive - Proposal to Strike off- 08931942 - Incorporated on 10 March 2014