| Apply NOW Ltd | Richmond | 2023 |
| Apply Quantum Limited | Edinburgh | 2023 |
| Apply Recruiting Ltd | London | 2025 |
| Apply Within Ltd | Benfleet | 2024 |
| Apply Works Ltd | Falmouth | 2015 |
| APPLY2EDUCATION Limited | Bracknell | 2016 |
| Applyde Ltd | Letchworth | 2023 |
| Applying Design Ltd | London | 2022 |
| Applying YOU Ltd | Port Talbot | 2011 |
| Applymedia Limited | Welwyn | 1996 |
| Applynow.Io Ltd | Doncaster | 2025 |
| Applyteq Consultants Limited | | 1978 |
| Appmax Pro Ltd | London | 2025 |
| Appmilk Limited | Bracknell | 2012 |
| Appnano Europe Limited | Maidstone | 2013 |
| Appo Myla Limited | London | 2017 |
| Appoint Staff Limited | Ashford | 1996 |
| Appointclipy Consulting Ltd | London | 2026 |
| Appointed Safety Ltd | Wrexham | 2020 |
| Appointee Services Ltd | Chatham | 2018 |
| Appointify AI Ltd | Otley | 2025 |
| Appointments @ Uptown Limited | London | 2006 |
| Appointree Limited | Wolverhampton | 2012 |
| Appointt Ltd | Barnstaple | 2021 |
| Appollo 7 Ltd | London | 2017 |
| Appollo Bird Consultants Ltd | Purley | 2014 |
| Appollonia Research Ltd | London | 2009 |
| Appolodale Associates Limited | Scarisbrick | 1993 |
| Appolonia Ltd | Blackburn | 2024 |
| Apponyi Design Limited | London | 2020 |
| Apposing Group Limited | Bromborough | 2020 |
| Apposing Limited | Bromborough | 2010 |
| Apposyte Limited | London | 2020 |
| Appoyar Services Limited | Bexleyheath | 2013 |
| Apppay Management Limited | Barnet | 2017 |
| Appr Limited | Sheffield | 2018 |
| Appraisal & Purchase Ltd | Bradford | 2015 |
| Appraisals Abound Limited | Croydon | 2011 |
| Appraise Fire Engineering Consultancy Limited | Sheffield | 2022 |
| Appraise Ltd | London | 2017 |
| Appraisers UK Ltd | Bristol | 2009 |
| Appreciate Limited | Merseyside | 1983 |
| Appreciating People Limited | Bootle | 2008 |
| Appreciative Consulting Limited | London | 2025 |
| Apprentice RS Limited | London | 2023 |
| Apprenticeshipally Ltd | Leeds | 2026 |
| Apprentify Group Limited | Wilmslow | 2018 |
| Apprentix Limited | London | 2025 |
| Apprentx Ltd | Bury St. Edmunds | 2026 |
| Apprise Consulting Ltd | Coventry | 2003 |
| Apprise Experience Design Limited | Bath | 2013 |
| Appro Maritime Ltd | Chichester | 2023 |
| Appro Solutions Ltd | Newcastle Upon Tyne | 2020 |
| Approach Accountants Ltd | Harrow | 2022 |
| Approach AI Ltd | Harrogate | 2025 |
| Approach Biotech Corporation Limited | Cardiff | 2010 |
| Approach Consultancy Ltd | Tarporley | 2003 |
| Approach Consultancy Services Ltd | Aylesbury | 2018 |
| Approach Geophysics Ltd | Chipping Norton | 2004 |
| Approach Ltd | London | 2019 |
| Approach Studio Ltd | London | 2020 |
| Approachable Accountants Ltd | York | 2010 |
| Approachable Certification Ltd | Manchester | 2013 |
| Approbation Ltd | Bude | 2019 |
| Approcourt Limited | Devizes | 1994 |
| Appropinquo Limited | London | 2025 |
| Appropriate Accountancy and Tax Advisers Ltd | London | 2012 |
| Appropriate Design Solutions Ltd | Milton Keynes | 2003 |
| Appropriate Innovation Limited | Worcestershire | 2006 |
| Appropriate Scale Ltd | Exeter | 2025 |
| Appropriate Training & Consultancy Ltd | Rochester | 2021 |
| Approvals Consultancy Services Limited | Blackwood | 2019 |
| Approved Accounting Ltd | Portsmouth | 1999 |
| Approved Builders Group Limited | Hove | 2022 |
| Approved Building Compliance Ltd | Leicester | 2024 |
| Approved Building Consultancy Ltd | Leicester | 2015 |
| Approved Building Consulting Ltd | London | 2024 |
| Approved Business Advisers Ltd | Chippenham | 2026 |
| Approved Cleaning Services Ltd | Austerfield | 2006 |
| Approved Design Consultancy Limited | Ossett | 2000 |
| Approved Design Group Ltd | Woodford Green | 2023 |
| Approved Directories Ltd | Nottingham | 2025 |
| Approved Fire Engineering Ltd | Woodford Green | 2024 |
| Approved Fire Safety Ltd | Woodford Green | 2023 |
| Approved Lingo Translations Ltd | London | 2024 |
| Approved Linguistics Ltd | London | 2026 |
| Approved Media (Business) Limited | Preston | 2009 |
| Approved Media Limited | Sheffield | 2006 |
| Approved Modifiers Limited | Stoke On Trent | 2019 |
| Approved Professional Consultants Limited | Harrow | 2023 |
| Approved Recovery Limited | Portsmouth | 2019 |
| Approved Site Investigations Limited | Cornwall | 2006 |
| Approved Talent Ltd | London | 2025 |
| Approved Tax Ltd | Northampton | 2022 |
| Approved Wills Ltd | Birmingham | 2022 |
| Approximations CIC | London | 2025 |
| Apps (UK) Limited | Huntingdon | 2007 |
| Apps Accountancy Services Ltd | Brighton | 2008 |
| Apps Centre Technology Limited | Liverpool | 2025 |
| Apps for Education Ltd | Hamilton | 2016 |