| Athlete Edge Fitness Solutions Ltd | Education | 2025 |
| Atkinson VOS Limited | Wholesale & retail | 1993 |
| Atla Properties Ltd | Real estate | 2017 |
| Atlantic Fisher Limited | Wholesale & retail | 2022 |
| Atmos Supply Limited | Information & communication | 2025 |
| Atomic Insights Ltd | Professional & scientific | 2022 |
| Auction House North West Commercial Limited | Real estate | 2016 |
| Audioworks (North West) Limited | Professional & scientific | 2004 |
| Aughtonstoves Limited | Other services | 2018 |
| Aura Sales Recruitment Limited | Administrative & support | 2005 |
| Aura Smart Home Limited | Wholesale & retail | 2022 |
| Auraline Aesthetics and Weight Management Clinic Limited | Other services | 2025 |
| Aurize Ltd | Wholesale & retail | 2025 |
| Aurora Lancaster Ltd | Other services | 2014 |
| Aurora Property Holdings Limited | Real estate | 2019 |
| Aurora Psychology Ltd | Health & social care | 2024 |
| Aurora Zyves Limited | Professional & scientific | 2017 |
| Aurumgold Limited | Professional & scientific | 2017 |
| Austens & Co UK Ltd | Information & communication | 2025 |
| Austens Estates Ltd | Real estate | 2025 |
| Austens Holdings Ltd | Financial services | 2025 |
| Authorised REP Compliance Ltd | Professional & scientific | 2020 |
| AV Storage of Lancaster Limited | Administrative & support | 2021 |
| AV7 Limited | Professional & scientific | 2005 |
| AV7 Trustee Limited | Professional & scientific | 2007 |
| Avantico Limited | Hospitality | 2020 |
| Avenue Dance Company Limited | Arts & recreation | 2023 |
| Avery Ashton Estates Limited | Real estate | 2026 |
| Avid Brewing Co. Ltd | Manufacturing | 2015 |
| AW Davies Electrical Ltd | Construction | 2024 |
| Awol Recruitment Limited | Administrative & support | 2002 |
| Awol Solutions Limited | Hospitality | 2008 |
| AXJ Property Limited | Wholesale & retail | 2021 |
| Ayrshire Artisan Chefs Limited | Extraterritorial | 2017 |
| Aystel Trading Limited | Real estate | 2002 |
| Azullo Limited | Information & communication | 2009 |
| B & J Partners Limited | Extraterritorial | 1999 |
| B a Wills Ltd | Construction | 2021 |
| B and S Traill Medical Ltd | Health & social care | 2018 |
| B R Hilton Ltd | Health & social care | 2026 |
| B&C Surgical Services Limited | Health & social care | 2022 |
| B23 Limited | Real estate | 2024 |
| Baby and ME App Ltd | Information & communication | 2026 |
| Babyballet Bristol South East West Ltd | Arts & recreation | 2017 |
| Babyballet Clapham and Balham Limited | Education | 2024 |
| Babyballet DBB Ltd | Education | 2012 |
| Babyballet Folkestone Limited | Arts & recreation | 2024 |
| Babyballet Guildford Central Limited | Education | 2024 |
| Babyballet Sutton and Epsom Central Limited | Education | 2024 |
| Back to Brilliant Ltd | Construction | 2023 |
| Backridge Management Company Ltd | Real estate | 2010 |
| Badger Snacks Ltd. | Hospitality | 2017 |
| Bagley Construction Services Limited | Construction | 2024 |
| Bailrigg Chase Management Limited | Real estate | 2002 |
| Bailrigg Diagnostics Limited | Professional & scientific | 2012 |
| Bailrigg Immunodiagnostics Limited | Professional & scientific | 2017 |
| Baines and Baines Property Limited | Real estate | 2021 |
| Baldwin Building Services Limited | Construction | 2018 |
| Baldwin Business Development Services Limited | Administrative & support | 2018 |
| Baldwin Plumbing Services Limited | Construction | 2018 |
| Baldwins Accountancy Limited | Professional & scientific | 2022 |
| Balik 2024 Ltd | Hospitality | 2024 |
| Balldent Ltd | Health & social care | 2021 |
| Balm Nature Ltd. | Wholesale & retail | 2021 |
| Bambers Farm Ltd | Agriculture & fishing | 2018 |
| Bank Road (Lancaster) Limited | Households | 2006 |
| Bankfield (Carnforth) Limited | Agriculture & fishing | 2019 |
| Banks Lyon Jewellers Limited | Wholesale & retail | 2002 |
| Banoffee Lettings Ltd | Real estate | 2022 |
| Banub Ltd | Wholesale & retail | 2025 |
| BAR12 Limited | Hospitality | 2022 |
| BAR6 Limited | Hospitality | 2023 |
| Bare Village Butchers & Deli Ltd | Wholesale & retail | 2006 |
| Barkers Farms Limited | Agriculture & fishing | 2001 |
| Barnabas AID International | | 2020 |
| Barnes Electrical Solutions Ltd | Construction | 2025 |
| Barnes Property Management Ltd | Real estate | 2024 |
| Barrie Support Services Limited | Other services | 2024 |
| Barrie Wells Trust | Arts & recreation | 2009 |
| Barton & Denby Limited | Administrative & support | 2013 |
| Barton Barn (Lancaster) Management Limited | Households | 2013 |
| Barton Gardens Lancaster Residents Property Management Company Ltd | Households | 2022 |
| Barton Park Estates Limited | Hospitality | 2003 |
| Barton Park Exchanges Limited | Real estate | 2026 |
| Barton Park Homes Limited | Wholesale & retail | 2000 |
| Bassett Transport Training Limited | Professional & scientific | 1989 |
| Bassetts Roadway Limited | Professional & scientific | 1947 |
| Bassetts Transport Limited | Professional & scientific | 1964 |
| Bay Beauty Boutique Ltd | Other services | 2009 |
| Bay Beds Lancaster Ltd | Wholesale & retail | 2022 |
| Bay Business Community Ltd | Real estate | 2021 |
| Bay Camera & Communications Limited | Administrative & support | 2009 |
| Bay Caravan Parks Limited | Hospitality | 2019 |
| Bay Communications Group Limited | Professional & scientific | 2012 |
| Bay Electrical Solutions Ltd | Construction | 2021 |
| Bay EV Limited | Construction | 2017 |
| Bay Fusion Limited | Construction | 2021 |
| Bay Housing Group Limited | Real estate | 2024 |
| Bay Lake MCD Ltd | Information & communication | 2016 |
| Bay Living Limited | Real estate | 2018 |