| Avoir London Ltd | Wholesale & retail | 2020 |
| Avon Property Development Limited | Construction | 2026 |
| Avona Health LLP | | 2024 |
| Avondale Business Consultancy Ltd | Professional & scientific | 2014 |
| AVR7 Limited | Construction | 2026 |
| Avss Medicals Limited | Health & social care | 2023 |
| AW Home Solutions Ltd | Construction | 2009 |
| AW Well Services Ltd | Mining & quarrying | 2019 |
| AW9 Ltd | Wholesale & retail | 2020 |
| Award Mortgages Limited | Financial services | 2007 |
| Awards Macadam Limited | Construction | 2022 |
| AWH Build Limited | Construction | 2025 |
| Awtw Limited | Education | 2022 |
| Axholme Build Limited | Real estate | 2019 |
| Axholme Fencing Limited | Construction | 2023 |
| Axholme Kitchens & Bedrooms Ltd | Construction | 2007 |
| Axiom Developments and Business Services Ltd | Construction | 2011 |
| Axonic Limited | Information & communication | 2018 |
| Axsbo.Com Ltd | Transport & logistics | 2024 |
| AY Properties Limited | Construction | 2015 |
| Ayan Catering Limited | Hospitality | 2025 |
| Ayeshop Ltd | Wholesale & retail | 2026 |
| Aylar Shop Ltd | Hospitality | 2024 |
| Aylesford Medical Consulting Ltd | Health & social care | 2016 |
| Ayms Consultancy Limited | Professional & scientific | 2017 |
| Ayotayo Limited | Wholesale & retail | 2024 |
| AYSUN05 Ltd | Hospitality | 2019 |
| Ayuk & OJI Property Investment Limited | Real estate | 2024 |
| Azwa Global Ltd | Wholesale & retail | 2026 |
| B & M Transport Limited | Transport & logistics | 2012 |
| B & R LEE Roofing Limited | Construction | 2026 |
| B & S Brow Boutique Limited | Other services | 2026 |
| B and C Holdings Lincoln Ltd | Professional & scientific | 2024 |
| B B Mortgages Ltd | Financial services | 2012 |
| B Connect Events Limited | Other services | 2023 |
| B D H Consulting and Solutions Ltd | Transport & logistics | 2025 |
| B Knight & SON Limited | Manufacturing | 2003 |
| B Tang Ltd | Hospitality | 2020 |
| B Tuned Ltd | Wholesale & retail | 2021 |
| B W Ball and Sons LLP | | 2014 |
| B Wade Drylining & Plastering Services Ltd | Construction | 2017 |
| B&C Outdoor Innovations Limited | Construction | 2025 |
| B&Fame Solutions Ltd | Hospitality | 2021 |
| B&G Assets Ltd | Real estate | 2017 |
| B&L Cottages Ltd | Hospitality | 2024 |
| B&M Properties and Developments Limited | Construction | 2025 |
| B&Mk Properties Limited | Real estate | 2022 |
| B&P Sellers Limited | Wholesale & retail | 2021 |
| B'S Basement Ltd | Wholesale & retail | 2018 |
| B-Hive Innovations Limited | Professional & scientific | 2017 |
| B.Eyre & SON Limited | Wholesale & retail | 1961 |
| B.F.T Scaffolding Ltd | Construction | 2020 |
| B.I.G. Consultants Ltd | Real estate | 2020 |
| B.M. Recruitment Agency Limited | Administrative & support | 2011 |
| B.R. Developments (Lincs) Limited | Construction | 2008 |
| Babaganoots Ltd | Arts & recreation | 2026 |
| Babatkwala Ltd | Wholesale & retail | 2025 |
| Babington Holmes Ltd | Professional & scientific | 2019 |
| Babiuch Production Limited | Information & communication | 2024 |
| Babu Homes Ltd | Wholesale & retail | 2023 |
| Baby Bloom Kids Store Limited | Wholesale & retail | 2024 |
| BAD London Limited | Manufacturing | 2012 |
| Bade York Ltd | Hospitality | 2019 |
| Badoni Clark Ltd | Professional & scientific | 2022 |
| Badonkadonk Limited | Information & communication | 2022 |
| Baeta Event Solutions Ltd | Professional & scientific | 2010 |
| Baggies GAS Turbine Maintenance Support Ltd | Professional & scientific | 2024 |
| Baiju&Co Limited | Construction | 2026 |
| Bail and Wharf Ltd. | Real estate | 2007 |
| Bailey Motor Group Ltd | Wholesale & retail | 2024 |
| Bailgate Court (Lincoln) Management Company Limited | Households | 2017 |
| Bailgate Court Ltd | Construction | 2016 |
| Bailgate Court Management Company Limited(The) | Administrative & support | 1985 |
| Bailgate Hair (Lincoln) Limited | Other services | 2012 |
| Bailgate Hearing Ltd | Wholesale & retail | 2020 |
| Bailgate Ltd | Hospitality | 2012 |
| Bailgate Marketing Limited | Real estate | 1977 |
| Bailgater Ltd | Wholesale & retail | 2026 |
| Bailie & Bailie Ltd | Administrative & support | 2003 |
| Bain Energy Limited | Energy | 2022 |
| Bainland Country Park Limited | Arts & recreation | 1996 |
| Bake Balance Ltd | Hospitality | 2022 |
| Baked AF Ltd | Hospitality | 2024 |
| Baker Guinness Developments Limited | Real estate | 2025 |
| Bakes by Sonia Ltd | Manufacturing | 2021 |
| Bakkah Decors Limited | Wholesale & retail | 2024 |
| Balance Bookkeeping Services Ltd. | Professional & scientific | 2019 |
| Balcad Enterpises Ltd | Wholesale & retail | 2021 |
| Baldewyne Consultancy Limited | Construction | 2023 |
| Balfour ENT Ltd | Health & social care | 2013 |
| Ballycrest Limited | Households | 2005 |
| Bancroft Energy Services Ltd | Construction | 2012 |
| Bancroft Holdings Limited | Real estate | 2023 |
| Banditworks Limited | Construction | 2025 |
| Bannister Electrical Services Limited | Construction | 2015 |
| Banzai Food Limited | Hospitality | 2019 |
| Baptist Building & Roofing Co. Limited | Construction | 2000 |
| Bar SIX (Lincoln) Ltd | Hospitality | 2015 |
| Barakah Rayan Ltd | Wholesale & retail | 2023 |
| Barakat Construction Ltd | Real estate | 2024 |