- G O'NEILL LTDActive - Proposal to Strike off- 04724136 - Incorporated on 4 April 2003 
- NEIL AA LTDActive - Proposal to Strike off- 10532519 - Incorporated on 19 December 2016 
- D.A. O'NEILL LTDDisolved- 10880329 - Dissolved on 28 May 2024 
- H, C & M O'NEILL LTD- NI729105 - Incorporated on 2 May 2025 
- GUY AINSWORTH-OAKES LTD.Dissolved- 07839622 - Dissolved on 30 April 2013 
- NEILSON NEILSON LIMITEDDissolved- 05820461 - Dissolved on 13 September 2011 
- WILLIAMS OF PETERSFIELD LTD- 04092430 - Incorporated on 18 October 2000 
- A.& A. O'NEILL LTD- 06813836 - Incorporated on 9 February 2009 
- NEILA LTDDisolved- 07056886 - Dissolved on 4 April 2025 
- R. O'NEILL LTDActive - Proposal to Strike off- 05668890 - Incorporated on 9 January 2006 
- NEIL GR LLP- OC447885 - Incorporated on 23 June 2023 
- NEILZ LTD- 15836044 - Incorporated on 12 July 2024 
- NEIL MC LTD- 16262890 - Incorporated on 19 February 2025 
- AINSWORTHS (LONDON) LIMITED- 01165553 - Incorporated on 3 April 1974 
- DOUGILL FIRE APPLIANCE COMPANY LIMITED- 04518166 - Incorporated on 23 August 2002 
- AINSWORTH & PARKINSON (NORTHERN) LIMITEDActive - Proposal to Strike off- 02666560 - Incorporated on 28 November 1991 
- AINSWORTH CONSTRUCTION AND ELECTRICAL LIMITEDActive - Proposal to Strike off- 10393491 - Incorporated on 26 September 2016 
- LORENC & SONS LTD- 12159530 - Incorporated on 16 August 2019 
- AINSWORTH ROAD P.O. LIMITED- 04934365 - Incorporated on 16 October 2003 
- AINSWORTH NOMINEES 2 LTD- 12340285 - Incorporated on 29 November 2019