| A W Enterprises Ltd | London | 2022 |
| A W Management Systems Limited | Grimsby | 2019 |
| A W Media Limited | | 2003 |
| A W Renamed Ltd | London | 2023 |
| A Walke Enterprises Limited | Northwich | 2015 |
| A Waterhouse Business Ltd | Tetbury | 2022 |
| A Way With Media Limited | Worcester | 2015 |
| A Whiff of 'R' Promotions Limited | Chessington | 2007 |
| A White IT Ltd | Ebbw Vale | 2014 |
| A Whitney Consulting Ltd | London | 2015 |
| A Wholesome Life Ltd | Norwich | 2023 |
| A Winkler Ltd | Gerrards Cross | 2021 |
| A Woman Walks Limited | London | 2023 |
| A Wood Fella Ltd | Bournemouth | 2026 |
| A Wooden Post Ltd | Glasgow | 2026 |
| A Word in Your EAR Productions Ltd | London | 2011 |
| A Y Exclusive Limited | Grays | 2018 |
| A Y M S Consulting Limited | Guildford | 2017 |
| A Year in London Ltd | London | 2022 |
| A Young Editor Ltd | Harlow | 2018 |
| A Z IT Solutions Ltd | Barking | 2019 |
| A Z Service Consultancy Limited | Hounslow | 2021 |
| A&3A Ltd | Pinner | 2023 |
| A&A Advisory Ltd | Ilford | 2011 |
| A&A Allegra Limited | London | 2021 |
| A&A Aruna Limited | Warrington | 2024 |
| A&A Atelier Ltd | Wilmslow | 2025 |
| A&A Consultancy and Services Ltd | Leicester | 2026 |
| A&A Digital Tech Ltd | Brentford | 2016 |
| A&A Enterprise and IT Consulting Ltd | London | 2023 |
| A&A Fibre Tech Ltd | Sittingbourne | 2019 |
| A&A Global Solutions Ltd | Ilford | 2020 |
| A&A Healthcare Solutions Ltd | London | 2025 |
| A&A Intelligent Technology Product Development Ltd | London | 2022 |
| A&A IT Consulting Ltd | Ilford | 2020 |
| A&A IT Networks Ltd | Sunderland | 2024 |
| A&A IT Services Limited | Lancaster | 2013 |
| A&A IT Solutions Ltd | Crawley | 2019 |
| A&A Marketing Group Ltd | London | 2025 |
| A&A Promotions Ltd | Slough | 2025 |
| A&A Rowlands Limited | Chester Le Street | 2024 |
| A&A Sherbime Shqiptare UK Ltd | London | 2026 |
| A&A Soft TEC Ltd | Derby | 2013 |
| A&A Software Solutions Limited | Greenock | 2024 |
| A&A Technology Consultancy Services Ltd | Warrington | 2013 |
| A&A Technology Limited | Basingstoke | 2016 |
| A&A Vision Ltd | Aldershot | 2019 |
| A&A.It Ltd | Cardiff | 2019 |
| A&A.Make Ltd | London | 2014 |
| A&A2 Consulting Ltd | Tamworth | 2025 |
| A&B Process Consultants Ltd | Barton Upon Humber | 2015 |
| A&B Technology Limited | Oldbury | 2022 |
| A&C Consulting Services Ltd | Leeds | 2023 |
| A&C Digital Ltd | London | 2026 |
| A&C Publications Ltd | Hemel Hempstead | 2011 |
| A&C Studio Limited | London | 2012 |
| A&C1 Ltd | Luton | 2022 |
| A&D Communications Limited | Luton | 2017 |
| A&D Consultancy Ltd | Shenington | 2010 |
| A&D Dragons Bros Limited | Waterlooville | 2025 |
| A&D Gaming Ltd | Southsea | 2025 |
| A&D Media Limited | London | 2023 |
| A&D Pretty Savage Ltd | Waterlooville | 2026 |
| A&Dr Ltd | Kington | 2018 |
| A&E Accessibility and Environment CIC | Bristol | 2025 |
| A&E Digital Services Ltd | London | 2025 |
| A&E Productions Ltd. | London | 2017 |
| A&F NET Solutions Limited | Middlesex | 2017 |
| A&F Testing Technology Limited | London | 2026 |
| A&G Communications Ltd | Esher | 2010 |
| A&G Consultancy Services Limited | London | 2015 |
| A&G Digital Ltd | Shefford | 2025 |
| A&G Solutions Ltd | Dewsbury | 2025 |
| A&G Synergy Ltd | Shefford | 2024 |
| A&H Consultants Limited | London | 2015 |
| A&H Creative Business Solutions Limited | Romford | 2014 |
| A&H IT Consultancy Limited | Wolverhampton | 2017 |
| A&H Media Group Ltd | Cambridge | 2022 |
| A&H PVT Ltd | London | 2012 |
| A&I Consult Ltd | London | 2024 |
| A&I IT Services Limited | Bornemouth | 2026 |
| A&I Podcast Ltd | London | 2026 |
| A&I Tech Ltd | London | 2025 |
| A&J Bespoke Music Ltd | Manchester | 2022 |
| A&J Entertainment Ltd | London | 2011 |
| A&J Mobile Tech Ltd | Stamford | 2019 |
| A&J Networking Ltd | Walton-On-Thames | 2016 |
| A&J Stuart Online Ltd | Potters Bar | 2021 |
| A&J Ventures Limited | Liverpool | 2020 |
| A&K Comms Ltd | Bonnybridge | 2024 |
| A&K IT Solutions Ltd | Bedford | 2022 |
| A&K Star Limited | West Drayton | 2018 |
| A&M Advisory Ltd | Maidenhead | 2025 |
| A&M Floorwalker Ltd | London | 2022 |
| A&M Invest Ltd | London | 2018 |
| A&M Recruiting Ltd | Guildford | 2023 |
| A&M Red Comms Limited | London | 2025 |
| A&N Independence Ltd | Stevenage | 2025 |
| A&N Tech Limited | High Wycombe | 2016 |
| A&N-Technology Ltd | Dagenham | 2025 |