| Analyst Investments Limited | Richmond | 1998 |
| Analysts of London Investments Limited | London | 2019 |
| Analyte Bidco Limited | Lynchwood | 2026 |
| Analyte Topco Limited | Lynchwood | 2026 |
| Analytic Holdings Limited | Teddington | 2020 |
| Analytical Data Ltd | Wimborne | 2022 |
| Analytical Scientific Hardware Instruments Limited | Macclesfield | 1996 |
| Analytichem Holding (UK) Limited | Bicester | 2023 |
| Analytico Holdings Limited | Sutton | 2021 |
| Analytics Consulting Holdings Limited | Sutton | 2022 |
| Analytik Holdings Limited | Cambridge | 2025 |
| Anam Grace Group Limited | Manchester | 2022 |
| Anami 2019 Ltd | Birmingham | 2019 |
| Anami Agencies Ltd | Eltham | 2016 |
| Anamika Corporation Limited | London | 1977 |
| Anamilo Limited | London | 2021 |
| Anamnesis Holdings Limited | London | 2019 |
| Anand Financial Architecture Ltd | Uxbridge | 2017 |
| Anand Holdings Limited | Gerrards Cross | 2017 |
| Anand Investments Group Ltd | Old Windsor | 2014 |
| Anand Rathi Wealth UK Limited | City Of London | 2025 |
| Ananda Holdings Limited | Maidenhead | 2015 |
| Ananda Impact Ventures UK Limited | London | 2022 |
| Ananda Pharma Limited | London | 2018 |
| Anansi Financial Services Limited | South Ockendon | 2016 |
| Ananta Capital Holdings Ltd | London | 2026 |
| Ananta Capital Ltd | London | 2026 |
| Ananta Ventures Ltd | Colne | 2021 |
| Anantam Limited | Leicester | 2017 |
| Anantam Wealth Ltd | Leicester | 2020 |
| Anantia Limited | London | 2021 |
| Anaplan UK Holdings Limited | London | 2022 |
| Anaptyxis Chelsea Limited | London | 2022 |
| Anaptyxis Hyde Park Limited | London | 2025 |
| Anaptyxis Knightsbridge Limited | London | 2022 |
| Anaptyxis Parkside Limited | London | 2022 |
| Anar Capital Limited | Richmond | 2020 |
| Anar Trading Ltd | London | 2024 |
| Anarchy Investments Ltd | Liverpool | 2023 |
| Anarore Limited | Spalding | 2022 |
| Anasa Protect Ltd | Barnet | 2024 |
| Anasa Ventures Limited | Birmingham | 2018 |
| Anasdino Holdings Ltd | Churchgate Waltham Cross | 2024 |
| Anasense Ltd | London | 2026 |
| Anashim Limited | Harrow | 2018 |
| Anaspel Investments Limited | Croydon | 2021 |
| Anassa Holdings Limited | London | 2017 |
| Anassri Trading Ltd | London | 2025 |
| Anastasi Holdings Limited | London | 2020 |
| Anastasia Kingsnorth Holdings Ltd | Sheffield | 2026 |
| Anatec EOT Trustees Limited | Aberdeen | 2022 |
| Anaterra Ltd | Liverpool | 2023 |
| Anath Capital Group Limited | London | 2005 |
| Anathema Limited | Stoney Stanton | 2018 |
| Anatole Atlantic Holdings Limited | Kingston Upon Thames | 2026 |
| Anatolian Accountancy Ltd | Enfield | 2021 |
| Anatolian Holdings Ltd | London | 2019 |
| Anatomy Investment Research Ltd | London | 2019 |
| Anaverna Holdings Limited | London | 2022 |
| Anavo Care II Ltd | Surrey | 2025 |
| Anavo Care OHF Limited | Surrey | 2025 |
| Anaxi Group Holdings Limited | London | 2021 |
| Anay Holdings Ltd | Pinner | 2024 |
| Anaya Patel Ltd | Harrow | 2024 |
| Anaya Property Solutions Limited | London | 2020 |
| Anaya PVT Ltd | Bury St. Edmunds | 2022 |
| Anaz Holdings Ltd | London | 2023 |
| ANB Capital Ltd | London | 2026 |
| ANB Financial Consultancy Ltd | Cirencester | 2019 |
| ANB Investments International Limited | London | 2019 |
| ANB Law Financial Services Ltd | Peterborough | 2012 |
| Anbe Holdings Limited | Burscough | 2024 |
| Anbest Limited | Chippenham | 2020 |
| Anbev Alliance Limited | Beverley | 2023 |
| Anboer Limited | West Midlands, England | 2025 |
| Anbrett Group Ltd | Fleet | 2025 |
| ANC Capital Ltd | Glasgow | 2025 |
| ANC Care Holdings Limited | Bushey | 2026 |
| ANC Care Limited | Bushey | 2018 |
| ANC Wealth Ltd | Nottingham | 2025 |
| Anca Capital Partners Ltd | London | 2013 |
| Anca Investments Ltd | Shrewsbury | 2004 |
| Ancala Bioenergy Holdco Limited | London | 2017 |
| Ancala FP Limited | London | 2015 |
| Ancala Member Limited | London | 2015 |
| Ancala Water Services Topco 1 Limited | London | 2020 |
| Ancama Limited | London | 2014 |
| Ancarise Limited | Cheshire | 1986 |
| Ancaster Investments (UK) Ltd | Esher | 2011 |
| Ancasure Ltd | Leicester | 2014 |
| Ancean Limited | Hockley | 2022 |
| Ancell Equity Holdings Ltd | Saltburn-By-The-Sea | 2025 |
| Ancestors Limited | Folkestone | 2014 |
| Ancestral Lotus Ltd | London | 2025 |
| Anchard Holding Ltd | Sidcup | 2020 |
| Ancheng Holdings Limited | London | 2022 |
| Anchor 8 Holding Ltd | Eastbourne | 2022 |
| Anchor Bidco Limited | London | 2021 |
| Anchor Capital Asset Management (UK) Limited | London | 2022 |
| Anchor Capital Holdings (UK) Limited | London | 2020 |