| Aveni Aesthetics Ltd | Other services | 2024 |
| Aventaglobal Ltd | Wholesale & retail | 2024 |
| Aventice Ltd | Real estate | 2020 |
| Averank Digital Ltd | Professional & scientific | 2018 |
| Aversley Grange Management Company Limited | Households | 2026 |
| Avery's Retail Limited | Wholesale & retail | 2026 |
| Avfarming Ltd | Transport & logistics | 2024 |
| Avian Environmental UK Ltd | Other services | 2023 |
| Avian UK Services Limited | Professional & scientific | 2007 |
| Avicenna Online School Ltd | Education | 2025 |
| Avid Autos (Yaxley) Limited | Wholesale & retail | 2012 |
| Avid EAR Music Group Ltd | Information & communication | 2023 |
| Avidan Energy & Logistics Ltd | Wholesale & retail | 2010 |
| Avidd Design Limited | Professional & scientific | 2018 |
| AVJ Independent Financial Advice Ltd | Financial services | 2010 |
| AVK Holdco UK Limited | Manufacturing | 2021 |
| Avon Imports Ltd | Wholesale & retail | 2020 |
| AVS Cambs Ltd | Wholesale & retail | 2025 |
| Avsin Kebab Limited | Hospitality | 2021 |
| AVT Transport Ltd | Transport & logistics | 2025 |
| Avtech Media Limited | Information & communication | 2011 |
| Aware Promotional Merchandise Limited | Administrative & support | 2002 |
| Away Days Rental Ltd | Real estate | 2024 |
| Away Days SA Ltd | Real estate | 2025 |
| AWB (Holdings) Limited | Financial services | 2021 |
| AWB Electrical & Mechanical Services Limited | Construction | 1998 |
| AWD Electrical Solutions Ltd | Construction | 2023 |
| Awele Corporation Ltd | Public administration | 2021 |
| AWO Holdings Limited | Financial services | 2018 |
| AWR Industrial Engineering Ltd | Manufacturing | 2015 |
| Awrex Ltd | Information & communication | 2022 |
| AWS Transport Ltd | Transport & logistics | 2025 |
| Axal Ltd | Manufacturing | 2020 |
| Axcom Telco Ltd | Information & communication | 2020 |
| AXE Super Limited | Transport & logistics | 2024 |
| Axiiis Group Ltd | Professional & scientific | 2026 |
| Axiom Fleet Holdings Limited | Financial services | 2021 |
| Axiom Online Ltd | Information & communication | 2015 |
| Axiom PDR Services Limited | Wholesale & retail | 2021 |
| Axis Biomechanics Ltd | Education | 2026 |
| Axle Quads Limited | Wholesale & retail | 2022 |
| Axon Management (Peterborough) Limited | Real estate | 2002 |
| AY Collections Ltd | Wholesale & retail | 2024 |
| AY Food Centre Ltd | Wholesale & retail | 2025 |
| Ayaan Ices Ltd | Hospitality | 2013 |
| Ayaan Ices Mobile Dessert Ltd | Hospitality | 2020 |
| Ayaan Property Services Limited | Construction | 2024 |
| Ayaaz Healthcare Ltd | Health & social care | 2023 |
| Ayader Transportation Ltd | Transport & logistics | 2022 |
| Ayan & Deeksi Ltd | Wholesale & retail | 2026 |
| Aycevenue Limited | Hospitality | 2025 |
| AYD Investments Ltd | Real estate | 2018 |
| Aykroft Management Company Limited | Real estate | 2004 |
| Ayliff Auto Tech Ltd | Wholesale & retail | 2025 |
| Ayliff's Garage Ltd | Wholesale & retail | 2018 |
| Aymen Properties Ltd | Financial services | 2022 |
| AYN Accountancy Ltd | Professional & scientific | 2021 |
| AYO G Ltd | Construction | 2015 |
| AYOMI3 Limited | Health & social care | 2023 |
| Ayyada Care Ltd | Health & social care | 2024 |
| Ayzuse Ltd | Wholesale & retail | 2022 |
| AZ Cambs Ltd | Real estate | 2025 |
| AZ Medical Services Ltd | Health & social care | 2024 |
| AZ Plus Ltd | Wholesale & retail | 2017 |
| Azaad Rajub Property Investments Limited | Real estate | 2018 |
| Azadi Charcoal Grill Ltd | Wholesale & retail | 2026 |
| Azadi Food Center Ltd | Wholesale & retail | 2019 |
| Azadi Homes Ltd | Real estate | 2024 |
| Azalea Care Ltd | Health & social care | 2021 |
| Azalea Holdings Ltd | Real estate | 2025 |
| Azam Consulting Limited | Professional & scientific | 2025 |
| Azaria MK Ltd | Wholesale & retail | 2025 |
| Azazel RP Ltd | Information & communication | 2022 |
| Azazie UK Limited | Wholesale & retail | 2025 |
| AZD Contractors Ltd | Construction | 2018 |
| Azharhealth Ltd | Health & social care | 2026 |
| Azimuth Forensics Ltd | Information & communication | 2024 |
| Azimuth Music Limited | Information & communication | 2020 |
| Aziz & Sons Investments Ltd | Financial services | 2025 |
| Aziz Fast Food Limited | Hospitality | 2026 |
| Aziz Group Holdings & Investments Ltd | Financial services | 2025 |
| Azlansolutions Ltd | Information & communication | 2025 |
| Azora Ltd | Wholesale & retail | 2021 |
| Azure Trading Solutions Ltd | Wholesale & retail | 2013 |
| AZY Heating Ltd | Professional & scientific | 2026 |
| Azynura Ltd | Wholesale & retail | 2019 |
| Azzurri Ltd | Arts & recreation | 2017 |
| B & B Peterborough Limited | Real estate | 2020 |
| B & D Solutions Limited | Professional & scientific | 2023 |
| B & E Property Investment Services Limited | Real estate | 2022 |
| B & G Industrial Properties Ltd | Real estate | 2022 |
| B & G Living Ltd | Wholesale & retail | 2019 |
| B & H Connolly Ltd | Construction | 2019 |
| B & H Services Group Ltd | Construction | 2014 |
| B & P Fine Foods Limited | Wholesale & retail | 2003 |
| B & R Industrial Automation Limited | Manufacturing | 1988 |
| B & R Pubs and Bars Ltd | Hospitality | 2025 |
| B & R Retail Ltd | Wholesale & retail | 2023 |
| B & S Underwood Limited | Wholesale & retail | 2002 |
| B a Rogers Carpentry & Building Ltd | Manufacturing | 2024 |