| AG Technology Group Limited | Stockport | 2019 |
| AG Technology Investment UK Ltd | Stanmore | 2008 |
| AG Technology Solutions Ltd | Norwich | 2020 |
| AG UK Consulting Limited | Leicester | 2019 |
| AG Unitec Ltd | Reading | 2017 |
| Ag-Cmcc Limited | Nottingham | 2007 |
| Ag-I Technology Limited | Maidenhead | 2010 |
| Ag-Iatm Consulting Services Limited | Woodford Green | 2018 |
| Ag.Uk IT Consultancy Ltd | London | 2019 |
| Ag.Wgcddne Ltd | Bourne | 2022 |
| Ag/Cad Limited | Bolton | 1987 |
| AG1LE Limited | Abercynon | 2015 |
| AG20 Consulting Ltd | London | 2025 |
| AG3NCY Ltd | London | 2024 |
| AGA Consultants Ltd | London | 2025 |
| AGA Contracting Ltd | Worcester Park | 2015 |
| AGA Digital Ltd | Woodford Green | 2017 |
| AGA on the Run Travel Blog Ltd | London | 2025 |
| AGA Technologies Limited | Epsom | 2022 |
| Agaame Limited | Egham | 2024 |
| Agabis Ltd | Telford | 2022 |
| Agae Technologies Limited | London | 2025 |
| Against ALL Sense Media Limited | London | 2025 |
| Agak Biologics Ltd | Kirkcaldy | 2021 |
| Agalina International Ltd | Maidstone | 2023 |
| Agam Consulting Service Ltd | Staines-Upon-Thames | 2019 |
| Agam International Limited | London | 2019 |
| Agama Technology Limited | Edgware | 2024 |
| Agameri Ltd | Portsmouth | 2022 |
| Agami Systems Limited | Oldham | 2025 |
| Agamik Limited | Bathgate | 1994 |
| Agamon Technologies Limited | London | 2018 |
| Aganda Limited | Whitehills Business Park | 2010 |
| Aganealabs Ltd | London | 2014 |
| Aganeyan Limited | Reading | 2012 |
| Aganor Ltd | Tamworth | 2023 |
| Agansiv Limited | Wokingham | 2011 |
| Agant Finance Limited | Stirling | 2024 |
| Agantis Limited | Brentwood | 2020 |
| Agape and Vows UK Ltd | Grays | 2023 |
| Agape Consulting SC Limited | Kirkliston | 2025 |
| Agape Formation for ALL Nations Ltd | London | 2026 |
| Agape Labs Ltd | Coventry | 2025 |
| Agape OH Production Limited | Cardiff | 2019 |
| Agape S&P Ltd | Rickmansworth | 2009 |
| Agapeglobal Professional Services Limited | Rainham | 2010 |
| Agapenor Technologies Ltd | London | 2026 |
| Agapo Limited | Peterborough | 2023 |
| Agapé IT Ltd | Birmingham | 2024 |
| AGAPÉ4ALL Property Limited | Borehamwood | 2022 |
| Agar Media Ltd | Swindon | 2024 |
| Agaram Publishers Ltd | Sutton | 2023 |
| Agarathi Ltd | Canterbury | 2023 |
| Agaricus Consulting Limited | Liverpool | 2015 |
| Agartha Telekom Ltd | Kington | 2021 |
| Agarwal AI Ltd | Romford | 2022 |
| Agarwal Associates Limited | Dorking | 1986 |
| Agarwal Group Ltd | Horsham | 2024 |
| Agas Film Ltd | Wigan | 2019 |
| Agasthya Limited | Rugby | 2017 |
| Agastya Limited | Crawley | 2014 |
| Agastya Software Solutions Ltd | Basingstoke | 2011 |
| Agastya Tech Consulting Limited | Slough | 2025 |
| Agasya Infotech Limited | Windsor | 2018 |
| Agata Inventio Ltd | Reading | 2025 |
| Agate Holdings Limited | Cheltenham | 2017 |
| Agate Road Pictures Limited | London | 2009 |
| Agate Solutions Ltd | Glasgow | 2012 |
| Agate Systems Limited | London | 2016 |
| Agate Technology Ltd | London | 2014 |
| Agatha Christie Productions Limited | London | 2012 |
| Agatha Raisin 5 Ltd | London | 2024 |
| Agathian Ltd | Pinner | 2024 |
| Agathist Ltd | London | 2013 |
| Agathiyar Limited | Colchester | 2013 |
| Agave Blue Ltd | London | 2025 |
| Agave Games Limited | London | 2023 |
| Agave New Ventures Ltd | Haywards Heath | 2025 |
| AGB Connect Ltd | Kent | 2025 |
| AGB Films Ltd | Watford | 2003 |
| AGB Global Services Ltd | Rugby | 2024 |
| AGB Installations Limited | Northampton | 2017 |
| AGB Integration Ltd | Milton Keynes | 2023 |
| AGB Intl Limited | Croydon | 2022 |
| AGB IT Services Ltd | London | 2025 |
| AGB Online Solutions Limited | Dunfermline | 2016 |
| Agbioinvestor Limited | Edinburgh | 2025 |
| Agbm Limited | Morpeth | 2012 |
| Agbo Ventures Ltd | London | 2025 |
| Agbonlamoore Music Ltd | Norwich | 2021 |
| Agboworin Ltd | London | 2025 |
| AGC Computers Limited | Canterbury | 2016 |
| AGC IT Ltd | Canterbury | 2013 |
| AGC Solutions Limited | Camberley | 2008 |
| AGC Technologies Ltd | Leeds | 2025 |
| AGC Telecoms Ltd. | Melton Mowbray | 2012 |
| AGC Trade Fair Ltd | Hull | 2025 |
| Agc-Media Ltd | Torquay | 2026 |
| Agcd Consulting Ltd | Welwyn Garden City | 2025 |
| Agci Ltd | Oldbury | 2012 |