| Ambleside Building Contractors Limited | Construction | 1997 |
| Ambleside Engineering Company (Lakes) Limited | Construction | 1957 |
| Amboya Limited | Real estate | 1994 |
| Amphigean Limited | Administrative & support | 2003 |
| AMY Bateman Photography Limited | Professional & scientific | 2019 |
| Andrews Business Coaching Limited | Professional & scientific | 2010 |
| Andy Milton Photography Ltd | Professional & scientific | 2022 |
| Andy's English & Continental Limited | Hospitality | 2018 |
| Angel Salon Services Limited | Other services | 2025 |
| Anna Sorbie Ltd | Other services | 2021 |
| Anord Mardix (UK) Limited | Manufacturing | 1966 |
| Anord Mardix Acquisitions Limited | Financial services | 2017 |
| Anord Mardix Critical Power Services Limited | Manufacturing | 2011 |
| Anthemion Antiques Limited | Wholesale & retail | 2003 |
| Anthony Bryan Lund Enterprises Limited | Hospitality | 2021 |
| Anything Drawn - Architectural Limited | Professional & scientific | 2014 |
| Anything Technical Limited | Wholesale & retail | 2003 |
| Anytime Garage Ltd | Wholesale & retail | 2021 |
| Apex Artworks Ltd | Wholesale & retail | 2025 |
| Appleby Innovations Limited | Professional & scientific | 2022 |
| Applicable Services Ltd | Professional & scientific | 2002 |
| Aquaworks Ltd | Construction | 2023 |
| AR Cost Estimating & Management Services Limited | Construction | 2018 |
| Arbco Plumbing & Heating Services Ltd | Construction | 2023 |
| Arches Import Co Ltd | Wholesale & retail | 2026 |
| ARG Properties (Kendal) Ltd | Real estate | 2022 |
| Arnold Greenwood Solicitors Limited | Real estate | 2011 |
| Artaban Limited | Information & communication | 2000 |
| Asbestos and Air Management Services Ltd. | Water & waste | 1996 |
| Asby Property Developments Limited | Construction | 2026 |
| Ascent Marketing Communications Ltd | Professional & scientific | 2004 |
| Ashness Limited | Households | 2024 |
| Ashstreetcompany Ltd | Hospitality | 2020 |
| Ashton Meadows (Lancaster) Management Company Limited | Households | 2023 |
| Askew Cycles Limited | Wholesale & retail | 2014 |
| Aspect Drones Ltd | Other services | 2017 |
| Aspect Property Services (NW) Ltd | Construction | 2021 |
| Aspiring Access Ltd | Construction | 2022 |
| Association of Marine Electronic & Radio Colleges Limited | Education | 1997 |
| AT Contracting South Lakes Ltd | Agriculture & fishing | 2026 |
| Atkd Consulting Ltd | Wholesale & retail | 2021 |
| ATN Estates Ltd | Hospitality | 2025 |
| Atom Cake Ltd | Professional & scientific | 2021 |
| Attadale Grid Limited | Energy | 2016 |
| Austin Challis Limited | Construction | 2024 |
| Authentic Education Ltd | Education | 2012 |
| Authentic Swiss Watches Ltd | Wholesale & retail | 2017 |
| Automotive Glazing Solutions Limited | Wholesale & retail | 2006 |
| Avenue Hair by M & L Ltd | Other services | 2022 |
| Avibond Limited | Information & communication | 2005 |
| Axetec Limited | Wholesale & retail | 2010 |
| Axis Machines Ltd | Wholesale & retail | 2020 |
| B & M Harrison Limited | Professional & scientific | 2006 |
| B L Asset Management Limited | Financial services | 2014 |
| B&O Property Ventures Ltd | Real estate | 2025 |
| B.S. Technical Limited | Professional & scientific | 2007 |
| BA Electrical (Lakes) Limited | Construction | 2024 |
| Bagacan Limited | Administrative & support | 1993 |
| Bainbridge Electrical Limited | Manufacturing | 1999 |
| Bandcray Limited | Wholesale & retail | 1987 |
| Bangkok 7 Limited | Other services | 2017 |
| Bannisdale Consulting Limited | Professional & scientific | 2025 |
| Banxia Holdings Limited | Extraterritorial | 1998 |
| Banxia Software Limited | Information & communication | 1994 |
| Barking MAD Enterprises Ltd. | Education | 2010 |
| Barn HEY Farms Limited | Agriculture & fishing | 2002 |
| Barn View Cattery Ltd | Agriculture & fishing | 2022 |
| Barton Build Limited | Construction | 2019 |
| Barton Construction Design Limited | Professional & scientific | 2019 |
| Barton Sheq Services Limited | Administrative & support | 2019 |
| Basic Books (UK) Limited | Professional & scientific | 2025 |
| Bass Drum Nation CIC | Arts & recreation | 2019 |
| Bateson Electrical Limited | Construction | 2010 |
| BATESON87 Limited | Information & communication | 2020 |
| Bc-Best Care Ltd | Health & social care | 2018 |
| Beacon & Camden Buildings Limited | Households | 2026 |
| Beacon 10 Ltd | Other services | 2026 |
| Beautifullybalancedbooks Limited | Professional & scientific | 1997 |
| Beckenreid Limited | Financial services | 2017 |
| Beckside Plumbing and Heating Ltd | Construction | 2018 |
| Becky Swallow Photography Ltd | Professional & scientific | 2022 |
| Beezon Holdings Limited | Financial services | 1989 |
| Beijing House Chinese Ltd | Hospitality | 2024 |
| Belc Ltd | Professional & scientific | 2025 |
| Bellas Limited | Hospitality | 2000 |
| Bellbird Medical Communications Limited | Professional & scientific | 2020 |
| Bellingham Works Limited | Real estate | 2013 |
| BEN & JIM Cook Food Ltd | Hospitality | 2026 |
| BEN Cook Limited | Construction | 2014 |
| BEN Craghill Plumbing and Heating Ltd | Construction | 2023 |
| BEN Cunliffe Architects Limited | Professional & scientific | 2008 |
| BEN Glas Power Limited | Energy | 2014 |
| BEN Tibbetts Building & Joinery Limited | Construction | 2023 |
| Bendrigg Properties Ltd | Construction | 2026 |
| Benott Flooring Ltd | Wholesale & retail | 2022 |
| Berresford Estates Limited | Real estate | 2025 |
| Berrison Ltd | Professional & scientific | 2009 |
| Berthol Limited | Construction | 2013 |
| Bespoke Brands Limited | Professional & scientific | 2021 |
| Bespoke Construction Solutions Limited | Construction | 2016 |