| Andit Ltd | Blackpool | 2021 |
| Anditec Limited | Leicestershire | 1995 |
| Andiy Ltd | Keswick | 2018 |
| Andjelic Media Ltd | London | 2026 |
| Andl Investment Limited | London | 2025 |
| Andlane Ltd | London | 2026 |
| Andlar Technologies Ltd | Morden | 2023 |
| Andmore IT Limited | Farnham | 2017 |
| Andn Systems Ltd | Stalybridge | 2017 |
| Andna Ltd | London | 2026 |
| Andnan Ltd | Cheltenham | 2024 |
| Ando Digital Ltd | Huddersfield | 2022 |
| Ando Health Industry Services Co., Ltd | Cardiff | 2021 |
| Ando IT Ltd | Cambridge | 2018 |
| Ando.Codes Limited | London | 2024 |
| Andoa Limited | London | 2016 |
| Andoe Ltd | Middlesbrough | 2025 |
| Andomise Ltd | East Molesey | 2011 |
| Andon Technical Consultants Limited | Stevenage | 1997 |
| Andor Cards Ltd | Glenrothes | 2023 |
| Andor Consulting Ltd | London | 2018 |
| Andor Systems Limited | Wickford | 2024 |
| Andora Consulting Ltd | London | 2020 |
| Andoria Systems Consulting Ltd | London | 2018 |
| Andorlogix Limited | London | 2013 |
| Andorse Ltd | London | 2024 |
| Andover Forensics Limited | Witney | 2024 |
| Andover Radio Limited | Andover | 2015 |
| Andover Radio Mono | Andover | 2023 |
| Andovis Consulting Ltd | London | 2016 |
| Andoya Ltd | London | 2021 |
| Andp Filmstyles Limited | London | 2025 |
| Andquiss Ltd | London | 2013 |
| Andra Films Ltd | London | 2025 |
| Andrad Ltd | Doncaster | 2022 |
| Andralove Ltd | London | 2025 |
| Andrav Technology Limited | Basildon | 2016 |
| Andrax Engineering Ltd | Warrington | 2015 |
| Andrax Tech Services Ltd | Warrington | 2025 |
| Andre Bakker Ltd | London | 2025 |
| Andre Calvo Limited | Hove | 2018 |
| Andre Deutsch Limited | London | 1990 |
| Andre James Limited | London | 2007 |
| Andre Labi Professional Services Ltd | Barking | 2019 |
| Andre Whitbourn Ltd | Huddersfield | 2026 |
| Andrea Bond Ltd | Hampton | 2014 |
| Andrea Braga Ltd | Biggleswade | 2015 |
| Andrea Cimi Ltd | London | 2024 |
| Andrea Cuadrado Limited | Teddington | 2016 |
| Andrea DI Prata Ventures Ltd | London | 2018 |
| Andrea Finanza Ltd | London | 2014 |
| Andrea FOX Ltd | Southwark | 2013 |
| Andrea Ingham Consulting Ltd | Deal | 2025 |
| Andrea J Mitchell Ltd | Southall | 2015 |
| Andrea LA Martina Ltd | London | 2025 |
| Andrea Picon Consulting Ltd | London | 2026 |
| Andrea Round Clinical Coding Consultancy Limited | Middlesbrough | 2016 |
| Andrea the Giant UK, Limited | London | 2023 |
| Andrea Ursini Growth Services Limited | London | 2023 |
| Andreae Data Limited | Watford | 2025 |
| Andreano Consultants Limited | Warrington | 2018 |
| Andreas D Nold Ltd | Kingston Upon Thames | 2019 |
| Andreas Plastiras Digital Ltd | Barnet | 2018 |
| Andreas Turcati Limited | London | 2017 |
| Andreassen Technologies Ltd | Attleborough | 2025 |
| Andred Business Services Limited | London | 2024 |
| Andreea Connect Limited | Gloucester | 2022 |
| Andreev Consulting Ltd | London | 2022 |
| Andrei Core Consulting Limited | Whitehills Business Park | 2017 |
| Andrei Cosmin Taga Ltd | London | 2023 |
| Andrei Traian Iana Ltd | Warrington | 2025 |
| Andrej Productions Limited | London | 2023 |
| Andrejs Ivanejs 180878-10503 Ltd | London | 2024 |
| Andreli DEV Ltd | London | 2026 |
| Andrelle Limited | Knutsford | 2019 |
| Andres Bravo Ltd | London | 2024 |
| Andres Incorporations Limited | Bolton | 2025 |
| Andres Leon Limited | Wimborne | 2019 |
| Andretechnology Limited | Wakefield | 2025 |
| Andrew & Andrew IT Consultancy Services Ltd | London | 2026 |
| Andrew & Oaks Consulting Ltd | Altrincham | 2019 |
| Andrew Alonzi Limited | Newark | 2009 |
| Andrew Ardern Limited | Chester | 2015 |
| Andrew Ashwin Limited | Corby | 2014 |
| Andrew Baisden Ltd | London | 2023 |
| Andrew Bannock Limited | London | 1985 |
| Andrew Barraclough Limited | Grantham | 2008 |
| Andrew Baskeyfield Limited | High Wycombe | 2015 |
| Andrew Batch Consulting Ltd | Bingley | 2018 |
| Andrew Bennet Limited | Bolton | 2023 |
| Andrew Best Digital Limited | Coulsdon | 2025 |
| Andrew Bethell Associates Limited | London | 2011 |
| Andrew Binns Consultancy Ltd | Liverpool | 2021 |
| Andrew Bonner Consulting Ltd | Hove | 2021 |
| Andrew Brace Ltd | London | 2015 |
| Andrew Brenson Consulting Ltd | Beckenham | 2012 |
| Andrew Bruce Consulting Limited | Altrincham | 2017 |
| Andrew Bush Audio Ltd | Clydebank | 2023 |
| Andrew C. Richards Limited | Sheffield | 2007 |
| Andrew Cameron Ltd. | Tadley | 2000 |