| Aussie Services Limited | Transport & logistics | 2017 |
| Auto MFA Ltd | Wholesale & retail | 2023 |
| Auto Trade Motors Ltd | Wholesale & retail | 2026 |
| AUTOBAK95 Ltd | Transport & logistics | 2024 |
| Autodesigns Limited | Other services | 2007 |
| Autokey Solutions Ltd | Wholesale & retail | 2022 |
| Autolux Performance Ltd | Wholesale & retail | 2026 |
| AUTOMOTIVE4YOU Ltd | Wholesale & retail | 2021 |
| Autoteda Limited | Wholesale & retail | 2025 |
| Autozhift Ltd | Wholesale & retail | 2025 |
| Autumn Composites Ltd | Manufacturing | 2026 |
| AVE Maria Medics Limited | Health & social care | 2025 |
| Avert Fire (UK) Limited | Construction | 1991 |
| Avid Development Solutions Limited | Construction | 2020 |
| Avip Consultancy Limited | Health & social care | 2022 |
| Avram Abel Mirea Delivery Ltd | Transport & logistics | 2026 |
| Avram Transport Limited | Transport & logistics | 2023 |
| AW True Support Ltd | Health & social care | 2023 |
| AWB Engineering Services Ltd | Construction | 2017 |
| AWP Media Limited | Professional & scientific | 2015 |
| Axholme Business Support Ltd | Professional & scientific | 2026 |
| Axholme Car Exchange Limited | Wholesale & retail | 2015 |
| Axholme Floor Care Ltd | Administrative & support | 2024 |
| Axholme Industrial Developments Limited | Construction | 1975 |
| Axholme Property Limited | Households | 2021 |
| Axial Healthcare Ltd | Health & social care | 2026 |
| Axita Limited | Information & communication | 2011 |
| Axmoor LLP | | 2006 |
| Ayla Energy Services Ltd | Professional & scientific | 2022 |
| Ayla Fulfilment Limited | Transport & logistics | 2025 |
| Ayla Logistics Limited | Transport & logistics | 2021 |
| Ayyan Miah Ltd | Real estate | 2025 |
| B & C 2231 Holdings Limited | Financial services | 2025 |
| B & J Van Center Limited | Wholesale & retail | 2019 |
| B C (Roofing Contractors) Limited | Construction | 2008 |
| B C Roofing (Properties) Limited | Real estate | 2019 |
| B Campbell Accountants Limited | Professional & scientific | 2008 |
| B H Construction Co. Limited | Construction | 1990 |
| B N D Homes Ltd | Real estate | 2023 |
| B P a Properties Ltd | Real estate | 2020 |
| B&A Transport Limited | Transport & logistics | 2026 |
| B&M Properties Lincolnshire Ltd | Real estate | 2021 |
| B-United Against Depression & Suicide Limited | Health & social care | 2025 |
| B3 Facades UK Ltd | Construction | 2026 |
| B8 Ltd | Real estate | 2024 |
| BA Assist (Scunthorpe) Ltd | Health & social care | 2025 |
| BA Assist Ltd | Health & social care | 2025 |
| BA Properties (2014) Limited | Real estate | 2016 |
| BA Retail 2014 Ltd | Wholesale & retail | 2014 |
| Baba Kitchen Ltd | Hospitality | 2019 |
| Babbage-Ai Consultancy Limited | Professional & scientific | 2025 |
| Baby Dinosaurs Limited | Wholesale & retail | 2018 |
| Back 2 Back Sales Ltd | Wholesale & retail | 2026 |
| Back 2 Business Solutions Ltd | Professional & scientific | 2024 |
| Backboard Pro Ltd | Wholesale & retail | 2025 |
| Bacon Freight Limited | Transport & logistics | 2014 |
| Bacon Stall Limited | Wholesale & retail | 2010 |
| BAD Monkey Conversions Ltd | Manufacturing | 2019 |
| Bahar Restaurant 1 Ltd | Hospitality | 2026 |
| Bahar Restaurant 2 Ltd | Hospitality | 2025 |
| BAJ Diagnostics Ltd | Health & social care | 2019 |
| BAJ Property Ltd | Financial services | 2023 |
| Bakash Properties Ltd | Real estate | 2021 |
| Baked Bliss by Sophie Limited | Wholesale & retail | 2025 |
| Bakosons Properties Ltd | Real estate | 2022 |
| Baltic Town Restaurant Limited | Hospitality | 2015 |
| Balu Brothers Ltd | Wholesale & retail | 2024 |
| BAM Web Solutions Ltd | Information & communication | 2014 |
| Bambino 4D Ltd | Health & social care | 2025 |
| Bampoe Anaesthesia Services Limited | Health & social care | 2022 |
| Banasiak Properties Ltd | Construction | 2025 |
| Banyan Tree Properties Ltd | Real estate | 2018 |
| Bapke Limited | Transport & logistics | 2026 |
| Barakah Taxis Ltd | Transport & logistics | 2024 |
| Barberian Scunthorpe Ltd | Other services | 2023 |
| Barberingbyrobbiebell Limited | Other services | 2022 |
| Bargain World (Scunthorpe) Limited | Wholesale & retail | 2024 |
| Barker and Sons Transport Ltd | Transport & logistics | 2026 |
| Barlow Digital Limited | Information & communication | 2022 |
| Barnes (Scunthorpe) Limited | Other services | 2008 |
| Barrett Civil Engineering UK Limited | Construction | 2016 |
| Barrett Group UK Limited | Construction | 2016 |
| Barrett Plant Limited | Administrative & support | 2015 |
| Barrett Properties Limited | Real estate | 2014 |
| Barrett UK Partnership LLP | | 2025 |
| Barrsec Ltd | Administrative & support | 2015 |
| Barry Collen (Holdings) Ltd | Real estate | 1973 |
| Bartex Transport Ltd | Transport & logistics | 2019 |
| Barton Market Place Fish & Chips Limited | Hospitality | 2014 |
| Barton TT Taxis Limited | Transport & logistics | 2010 |
| Bassily Ophthalmic Services Ltd | Health & social care | 2017 |
| Battledrive Ltd | Wholesale & retail | 2026 |
| Batty Gaming Limited | Information & communication | 2015 |
| Baxi Global Transport Ltd | Transport & logistics | 2024 |
| Baylab Ltd | Wholesale & retail | 2024 |
| BB Store Ltd | Wholesale & retail | 2018 |
| Bbrw Steel Services Limited | Other services | 2010 |
| BC (Scunthorpe) Motors Limited | Wholesale & retail | 2018 |
| BC Upholstery Ltd | Other services | 2024 |
| BCL Homes (NW) Limited | Construction | 2015 |