| (NO Brand) Ltd | Wholesale & retail | 2018 |
| 12 Market ST Ltd | Professional & scientific | 2024 |
| 2:30 Dental Spa Limited | Extraterritorial | 2015 |
| 360 Pixie Limited | Professional & scientific | 2012 |
| 4J'S Workspace LLP | | 2024 |
| 5 Tollington Place Management Limited | Real estate | 2010 |
| A & P Stenson Holdings Limited | Financial services | 2016 |
| A & S Rental Properties Ltd | Real estate | 2024 |
| A and B Houses Ltd | Real estate | 2025 |
| A R B Contractors Limited | Construction | 2010 |
| A2B Electrical Services Ltd | Construction | 2022 |
| AAU Yorkshire Ltd | Construction | 2024 |
| AB Joinery & Construction Ltd | Construction | 2021 |
| Abacus Picture Framing and Gallery Ltd | Wholesale & retail | 1988 |
| Academy of Clinical Excellence Limited | Health & social care | 2007 |
| Acid FC Limited | Wholesale & retail | 2021 |
| Adam Mcnichol Ltd | Professional & scientific | 2019 |
| Adventure Spec Limited | Wholesale & retail | 2007 |
| AEM Plumbing Heating & Tiling Ltd | Construction | 2019 |
| Aeterno Solutions Limited | Information & communication | 2014 |
| AHR Inclusion Ltd | Professional & scientific | 2023 |
| AJB Hospitality Ltd | Administrative & support | 2018 |
| AKC Consultancy Limited | Information & communication | 2010 |
| Aksarus Limited | Wholesale & retail | 2012 |
| Alaska Equipment Limited | Wholesale & retail | 2014 |
| Alexandra Road 1958 Limited | Extraterritorial | 2014 |
| Alexius Ltd | Real estate | 2021 |
| Alixe Lobato Limited | Information & communication | 2017 |
| ALL My Systems Ltd | Information & communication | 2014 |
| Alterkind Ltd | Professional & scientific | 2017 |
| Alticom Limited | Information & communication | 2018 |
| Altior Equestrian Ltd | Wholesale & retail | 2020 |
| ALU Fold and Slide Ltd | Manufacturing | 2023 |
| Aluminium Suppliers Limited | Professional & scientific | 2024 |
| AMC ENG Limited | Professional & scientific | 2021 |
| Anaximander Systems Ltd | Information & communication | 2021 |
| Andrew Heptinstall Financial Services LLP | | 2008 |
| Antha Consulting Limited | Professional & scientific | 2025 |
| Anthony Riley Ltd | Professional & scientific | 2018 |
| AP Plumbing Solutions Ltd | Construction | 2026 |
| Appleby Street (Holdings) Limited | Financial services | 2021 |
| Appleby Street Limited | Financial services | 2021 |
| Aqua Paws Retreat Limited | Other services | 2025 |
| Arbiter Executive Protection Ltd | Administrative & support | 2025 |
| Arboretum Books Limited | Information & communication | 2025 |
| Architectonic Design Ltd | Professional & scientific | 2010 |
| Arrosedom Engineering Ltd | Manufacturing | 2025 |
| Art Illuminated Ltd | Wholesale & retail | 2021 |
| Art in the Loft Limited | Wholesale & retail | 2025 |
| Arthur Rhodes Ltd | Wholesale & retail | 2024 |
| Arvon Foundation Limited (the) | Education | 1972 |
| ASK the Question C.I.C. | Education | 2018 |
| Aspect Management Services Ltd | Administrative & support | 2019 |
| Asquiths Bullion Ltd | Wholesale & retail | 2026 |
| Assiduous Productions Ltd | Information & communication | 2021 |
| Atelier Waldbillig Limited | Professional & scientific | 2019 |
| Atiresh Limited | Public administration | 2020 |
| Atlas Group NW Limited | Construction | 2026 |
| Atmosphere Environmental Limited | Other services | 2009 |
| Atrad Sales Limited | Wholesale & retail | 2015 |
| Avenue RD & Co Ltd | Financial services | 2025 |
| Averycrown Limited | Real estate | 1982 |
| Axarus Limited | Wholesale & retail | 2007 |
| Axelport Limited | Construction | 2001 |
| AYA Sophia Holding Ltd | Financial services | 2021 |
| Bamboo Family Co Limited | Construction | 2018 |
| Bardo North Ltd | Information & communication | 2024 |
| BB UK Games Ltd | Wholesale & retail | 2025 |
| BDS Laboratory LLP | | 2011 |
| BDS Labs Limited | Health & social care | 2013 |
| Bear Foot Fitness Ltd | Health & social care | 2025 |
| Beardvale Limited | Professional & scientific | 1993 |
| Beate Kubitz Associates Ltd | Manufacturing | 2021 |
| Beaver Tree Services Calderdale Ltd | Agriculture & fishing | 2016 |
| Beck Psychology Services Limited | Health & social care | 2023 |
| Benchmark Travel Limited | Administrative & support | 2002 |
| Ben’S School of Swimming Ltd | Education | 2022 |
| Bespoke Products Group Ltd | Manufacturing | 2023 |
| Bessacarr Dental Limited | Health & social care | 2018 |
| Big Squeeze Limited | Other services | 2016 |
| Big TIN Shed Ltd | Administrative & support | 2016 |
| Bintliff Investments Limited | Real estate | 2017 |
| Birch Place Limited | Households | 2013 |
| Black Box Mint Limited | Information & communication | 2021 |
| Black Tiger Trading Ltd | Wholesale & retail | 2019 |
| Blackbox Engineering Limited | Professional & scientific | 2012 |
| Blackshaw Royd Equestrian Limited | Real estate | 2015 |
| Blade Rubber Stamps Ltd | Manufacturing | 2002 |
| Blazing Saddles Limited | Wholesale & retail | 2003 |
| BLB Home Group Ltd | Financial services | 2024 |
| Blow Hebden Bridge Ltd | Other services | 2015 |
| Blue JSF Limited | Hospitality | 2018 |
| Bluebears Allsorts Limited | Wholesale & retail | 2017 |
| Bluefin Group Limited | Wholesale & retail | 2020 |
| Bluefin Trading Limited | Wholesale & retail | 2013 |
| BOB Wild Grass Machinery Limited | Wholesale & retail | 2003 |
| Boggis Holdings LLP | | 2025 |
| Bolton & Speak Contractors Ltd | Construction | 2024 |
| Boodge IT Ltd | Professional & scientific | 2022 |
| Boom Graphics Limited | Professional & scientific | 2024 |