| Agencystream Technologies Ltd | London | 2024 |
| Agenda 21 Architects Studio Ltd | London | 2011 |
| Agenda Adapt Limited | Manchester | 2018 |
| Agenda Consulting Limited | Maidstone | 2002 |
| Agenda Design Associates Limited | | 1998 |
| Agenda Design Limited | | 1999 |
| Agenda Litigation Services (UK) Limited | London | 2025 |
| Agenda Lounge Consulting Ltd | Northampton | 2025 |
| Agenda Media Limited | Castlefield | 2004 |
| Agenda Project Management Limited | Warrington | 2024 |
| Agenda Projects Limited | Chorley | 2005 |
| Agenda Resource Management Limited | Hull | 1996 |
| Agenda Solutions Holdings Limited | Burnley | 2009 |
| Agenda Solutions Limited | Off Rossendale Road | 1997 |
| Agendi Ltd | London | 2020 |
| Agendums Strategic Solutions Ltd | Aberdeen | 2023 |
| Agene Limited | Watford | 1934 |
| Ageneer Limited | Bristol | 2026 |
| Agenex Ltd | Slough | 2023 |
| Agenium Ltd | London | 2017 |
| Agenix Ltd | Glasgow | 2019 |
| Agenome Ltd | Cambridge | 2023 |
| Agensi Ltd | London | 2017 |
| Agensia Ltd | Ashford | 2025 |
| Agensico Ltd | Leeds | 2025 |
| Agent & Kaye Limited | Leeds | 2018 |
| Agent Access Ltd | Dorking | 2026 |
| Agent Accountants Limited | London | 2022 |
| Agent Accounts Limited | London | 2008 |
| Agent Adjacent Limited | Swindon | 2014 |
| Agent Armour Accounts Limited | Lincoln | 2017 |
| Agent Assist Ltd | Ramsgate | 2020 |
| Agent Auto Ltd | Cardiff | 2015 |
| Agent Blackwell Ltd | London | 2025 |
| Agent Communications Limited | Leigh | 2009 |
| Agent Extra Ltd | Worcester | 2016 |
| Agent EYE Ltd | London | 2024 |
| Agent Green Limited | Bromley | 2016 |
| Agent Headsets Limited | Leigh | 2009 |
| Agent in One Ltd | Witney | 2024 |
| Agent International Ltd | Nottingham | 2017 |
| Agent Marketing Limited | Liverpool | 2006 |
| Agent Nine Ltd | Reading | 2025 |
| Agent of Change Ltd | Croydon | 2022 |
| Agent Online Marketeer Ltd | Cardiff | 2023 |
| Agent P Ltd | London | 2023 |
| Agent Path Ltd | Manchester | 2021 |
| Agent Provocateur IP Limited | London | 2017 |
| Agent Public Relations Limited | Sheffield | 2013 |
| Agent Telecommunications Limited | Leigh | 2009 |
| Agent Two Ltd | Taunton | 2026 |
| Agent Wolf Limited | Bolton | 2017 |
| Agent-Support-Consultancy Limited | Guildford | 2023 |
| AGENT8 Design Limited | Hook | 2003 |
| Agenta Scale Limited | Milton Keynes | 2025 |
| Agentax Advisory Ltd | London | 2026 |
| Agenterhub Ltd | Scunthorpe | 2026 |
| Agenthifive Ltd | London | 2026 |
| Agenti AI Ltd | Gravesend | 2026 |
| Agentia Design Consultants Limited | London | 2025 |
| Agentia ID Limited | London | 2025 |
| Agentic Advisers Ltd | Milton Keynes | 2025 |
| Agentic AI Amro Ltd | Tunbridge Wells | 2025 |
| Agentic AI Experts Ltd | London | 2025 |
| Agentic Artificial Intelligence Limited | Wrexham | 2025 |
| Agentic Consulting Limited | Leicester | 2025 |
| Agentic First Limited | St. Albans | 2025 |
| Agentic Football Limited | London | 2026 |
| Agentic Impact Limited | St. Albans | 2025 |
| Agentic International Ltd | London | 2025 |
| Agentic Multipreneurs Ltd | Dartford | 2025 |
| Agentic Partners Ltd | Stockport | 2025 |
| Agentic People Ltd | Wirral | 2026 |
| Agentic Risk IP | London | 2025 |
| Agentic Risks Ltd | London | 2025 |
| Agentic Sciences Ltd | Stafford | 2026 |
| Agentic Services Ltd | London | 2025 |
| Agentic Steam Ltd | London | 2026 |
| Agentic Value Limited | St. Albans | 2025 |
| Agenticise Ltd | Edgware | 2025 |
| Agentifyed Ltd | Manchester | 2025 |
| Agentis Capital Advisors UK Limited | Wilmslow | 2022 |
| Agentis Network Ltd | London | 2022 |
| Agentisk Ltd | Manchester | 2026 |
| Agentive Coaching Ltd | North Berwick | 2025 |
| Agentive Ltd | London | 2026 |
| Agentixflow Ltd | London | 2025 |
| Agentk Limited | Ruislip, | 2025 |
| Agentomation Ltd | Croydon | 2026 |
| Agentrix Ltd | Wirral | 2024 |
| Agents Aperture Ltd | London | 2015 |
| Agents for Accounting Ltd | London | 2013 |
| Agents Holdings Limited | Bedford | 2008 |
| Agents of Change Ltd | Harrogate | 2025 |
| Agents of Digital Change Ltd | Aberdeen | 2024 |
| AGENTS2CHANGE Limited | Evesham | 2006 |
| AGENTS4RM Limited | Exeter | 2009 |
| Agentscore Ltd | Woking | 2026 |
| Agentspcp Limited | London | 2025 |
| Agentvision Limited | London | 1991 |