| 1ST Place Surveying Limited | Professional & scientific | 2016 |
| 4PANELS Limited | Manufacturing | 2011 |
| 888 OK Ltd | Construction | 2016 |
| A & L Dent Solutions Limited | Wholesale & retail | 2017 |
| A H Commercials Limited | Wholesale & retail | 2011 |
| A H Molton Ltd | Administrative & support | 2016 |
| A J Lill Welding Services Ltd | Manufacturing | 2026 |
| A J S (Roofing & Cladding) Limited | Construction | 2009 |
| A Little BIT of Lincolnshire Ltd | Wholesale & retail | 2017 |
| A&K M Business Ltd | Wholesale & retail | 2025 |
| A&K Property Rentals Ltd | Real estate | 2026 |
| A-S-J Engineering Solutions Ltd | Professional & scientific | 2019 |
| A2B Group Ltd | Transport & logistics | 2018 |
| Abacus Technology Group Ltd | Wholesale & retail | 2021 |
| Abbey Joinery LLP | | 2024 |
| ACU Flat Track Championship Ltd | Arts & recreation | 2026 |
| Adaptalux Ltd | Manufacturing | 2014 |
| Aditum Engineering Ltd | Hospitality | 2019 |
| AE Refrigeration & Air Conditioning Ltd | Professional & scientific | 2016 |
| Aechen Ltd | Transport & logistics | 2024 |
| Africa Consult Limited | Wholesale & retail | 2013 |
| AGA Electrical Services Limited | Construction | 2020 |
| Aghaul Limited | Agriculture & fishing | 2008 |
| Agri Refurb Limited | Manufacturing | 2023 |
| Agrigleam Ltd | Wholesale & retail | 2024 |
| Agrijet Holdings Limited | Financial services | 2024 |
| AH Farms Ltd | Agriculture & fishing | 2018 |
| Ainsworth Homes Limited | Real estate | 2021 |
| Aitken-Smith Ltd | Wholesale & retail | 2026 |
| AKR Accounting & Tax Limited | Professional & scientific | 2025 |
| Albion Tea Rooms Limited | Hospitality | 2014 |
| Alchemy-Aaa Limited | Professional & scientific | 2015 |
| Allison Holdings Ltd | Real estate | 2019 |
| Allsopp Finance Ltd | Wholesale & retail | 2025 |
| Alpha Ceramics Ltd | Construction | 2022 |
| Always a Good Price Limited | Other services | 2008 |
| AM & PM Properties Limited | Real estate | 2016 |
| AM Power Engineering Ltd | Professional & scientific | 2025 |
| Ambience Lincolnshire Ltd | Professional & scientific | 2022 |
| Amica Accountancy Services Limited | Professional & scientific | 2015 |
| AMT Rose Aviation Services Limited | Transport & logistics | 2026 |
| AMY Lawton Consultancy Ltd | Other services | 2026 |
| Anchorpoint Technology Consulting Limited | Information & communication | 2022 |
| Anchorpoint Technology Limited | Information & communication | 2022 |
| Andrews & Bayram Property Services Limited | Real estate | 2013 |
| Andrews Property Management Services Ltd | Construction | 2014 |
| Antizar Advisory Ltd | Professional & scientific | 2026 |
| Aoife Sales Ltd | Wholesale & retail | 2026 |
| AP Farm Solutions Limited | Agriculture & fishing | 2024 |
| AP Mechanical Handling Limited | Manufacturing | 2019 |
| Aprender (UK) Limited | Education | 2010 |
| APT Global Fitness Limited | Extraterritorial | 2023 |
| Aqua Labs Chemicals Ltd | Manufacturing | 2019 |
| Arc&Hearth Ltd | Professional & scientific | 2026 |
| Archepalin CSS Ltd | Information & communication | 2024 |
| Arden Farms Limited | Agriculture & fishing | 1988 |
| Arden Farms Owmby Ltd | Agriculture & fishing | 1947 |
| Ardinov Ltd | Hospitality | 2023 |
| Arrowview Developments Ltd | Construction | 2023 |
| Artec Facilities Services Ltd | Construction | 2019 |
| Ashbys(Retail) Ltd | Wholesale & retail | 2016 |
| Ashbys(Wholesale) Ltd | Wholesale & retail | 2016 |
| Ashmaur (Holdings) Limited | Financial services | 2022 |
| Ashmaur Limited | Real estate | 2009 |
| Askew Racing and Consultancy Limited | Construction | 2024 |
| Aspire ALL Ltd | Professional & scientific | 2022 |
| Asten Instruments Limited | Professional & scientific | 1993 |
| Atkins Cyber Security Limited | Information & communication | 2019 |
| Atomik Architecture Limited | Professional & scientific | 2004 |
| Aurora Tax Planners Ltd | Professional & scientific | 2010 |
| Autofund Limited | Financial services | 2016 |
| Autoleasing Group Limited | Administrative & support | 2020 |
| Autozone (UK) Limited | Wholesale & retail | 2014 |
| Avert IT Limited | Information & communication | 1997 |
| AW Roofing & Cladding Ltd | Construction | 2025 |
| AW Social Work Limited | Health & social care | 2011 |
| Award Property Holdings Ltd | Construction | 2023 |
| Axon Data Limited | Manufacturing | 2025 |
| Ayus Ayurveda Lifecare Ltd | Manufacturing | 2021 |
| Azztec Plumbing & Heating Limited | Professional & scientific | 2014 |
| B & L Filleting Services Limited | Manufacturing | 2011 |
| B a Interiors Limited | Construction | 2008 |
| B Qual Ltd | Education | 2026 |
| B R Smith Consultancy Ltd | Professional & scientific | 2020 |
| B-Fit Lincs Ltd | Arts & recreation | 2016 |
| B.B.B Limited | Wholesale & retail | 2025 |
| B1 Housing Limited | Real estate | 2025 |
| B1 Plumbing&Heating Limited | Construction | 2025 |
| Backhaul Ltd | Construction | 2025 |
| Bafti Builders Ltd | Construction | 2019 |
| Bailgate Developments Limited | Construction | 2002 |
| Baker Berkeley Ltd | Administrative & support | 2023 |
| Balloons Galore (Scunthorpe) Limited | Wholesale & retail | 2023 |
| Ballr Life Ltd | Wholesale & retail | 2022 |
| Bargaincare Limited | Wholesale & retail | 2013 |
| Barkwith Property Holdings Limited | Real estate | 2025 |
| Barrett Combined Services Limited | Construction | 2021 |
| Bear Produce Limited | Agriculture & fishing | 2009 |
| Beckside Machinery Limited | Wholesale & retail | 2014 |
| Beelsby Homes Limited | Construction | 2020 |