| Arthur Travel UK Ltd | Administrative & support | 2024 |
| Artifex Vertus Ltd | Wholesale & retail | 2026 |
| Arwen Aesthetics Ltd | Health & social care | 2019 |
| Ashby Instrumentation Services Ltd | Construction | 2022 |
| Asinstallationsne Ltd | Construction | 2023 |
| Aspire Supporting Disabled Learning Ltd | Health & social care | 2015 |
| Atkinson Bespoke Interiors Ltd | Construction | 2019 |
| Atlantic Tank Clean Barry Limited | Transport & logistics | 2000 |
| Atlantic Way Developments Limited | Real estate | 2023 |
| Atlas Lettings Ltd | Real estate | 2020 |
| Atlc Engineering Limited | Construction | 2020 |
| Atroo Ltd | Wholesale & retail | 2025 |
| Autumn Leaf Digital Ltd | Information & communication | 2016 |
| Avant-Garde Works Ltd | Professional & scientific | 2016 |
| Avlia Limited | Real estate | 2021 |
| AW Rigging & Lifting Ltd | Professional & scientific | 2026 |
| Ayers & Co Joinery & Property Services Ltd | Construction | 2023 |
| Azmec Limited | Hospitality | 1967 |
| B & H Dairy Services Ltd | Professional & scientific | 2009 |
| B Hodgson Inspection Ltd | Professional & scientific | 2024 |
| B Silver Ltd | Wholesale & retail | 2024 |
| B&Lhospitality Ltd | Hospitality | 2026 |
| B. a. Johnson Portfolio Partnership LLP | | 2017 |
| B. a. Johnson Property Limited | Real estate | 2016 |
| BA Engineering Ltd | Professional & scientific | 2025 |
| BA IT Services Limited | Information & communication | 2016 |
| Badger's Bar Limited | Hospitality | 2021 |
| Banddcollectibles Ltd | Wholesale & retail | 2025 |
| Bar Noir Redcar Ltd | Hospitality | 2022 |
| Barker Consultancy Management Ltd | Public administration | 2024 |
| Barker Transport Solutions Limited | Transport & logistics | 2025 |
| Barrie Cook Limited | Professional & scientific | 2016 |
| Barwick Automotive Ltd | Wholesale & retail | 2026 |
| Basecraft Ltd | Hospitality | 2022 |
| Bayley Family Holdings Ltd | Real estate | 2017 |
| Bayley Family Partnership LLP | | 2017 |
| BC Property Group Ltd | Real estate | 2023 |
| Bdfd Lettings Ltd | Real estate | 2022 |
| BE Grounded Fitness Ltd | Education | 2023 |
| Beacon Lounge Ltd | Hospitality | 2020 |
| Beards C&C Ltd | Wholesale & retail | 2023 |
| Bees Nursery Ltd | Health & social care | 2024 |
| Beis Limited | Professional & scientific | 2007 |
| Bellevue Apartments Ltd | Hospitality | 2019 |
| Bennett Roofing and Building Ltd | Construction | 2025 |
| Bentley Medical Practice Limited | Health & social care | 2014 |
| Berisha Venture Ltd | Real estate | 2021 |
| Bespoke-Electrical-Uk Limited | Energy | 2019 |
| Beth and Bright Ltd | Administrative & support | 2026 |
| Betty Bumps Cafe Ltd | Hospitality | 2025 |
| Betty Leigh Boutique Limited | Wholesale & retail | 2025 |
| Beyond Housing Developments Limited | Hospitality | 2011 |
| BH Supervision Services Ltd | Construction | 2025 |
| Big Brew Limited | Real estate | 2016 |
| Big Oaks (Flag) Limited | Administrative & support | 2000 |
| Big White Van MAN Limited | Other services | 2014 |
| Bigliftcrane Ltd | Professional & scientific | 2025 |
| Bill's DIY Ltd | Wholesale & retail | 2023 |
| Bins & Beyond Ltd | Administrative & support | 2025 |
| Biodiddly Limited | Administrative & support | 2024 |
| Bird Box Property Limited | Real estate | 2021 |
| Birkbecks Electrical Limited | Wholesale & retail | 2013 |
| Blackaby Capital Limited | Real estate | 2021 |
| Blenheim Mews Management Company Limited | Households | 1989 |
| Bloom Creations Ltd | Administrative & support | 2025 |
| BOB Rose Limited | Wholesale & retail | 2003 |
| Bobby Retails Ltd | Wholesale & retail | 2022 |
| Bodyright Limited | Wholesale & retail | 2007 |
| Boiler Spec UK Limited | Construction | 2024 |
| Bonds (Redcar) Ltd | Wholesale & retail | 2013 |
| Booksmrt Ltd | Information & communication | 2024 |
| Boss Barber 1 Ltd | Other services | 2024 |
| Botpond Ltd | Professional & scientific | 2021 |
| Bourne Manse Limited | Households | 2001 |
| Bowles Luxury Living Ltd | Real estate | 2024 |
| Bowles Property Holdings Ltd | Real estate | 2020 |
| Brennan Organisation Ltd | Information & communication | 2022 |
| Brito & Edgerton LLP | | 2021 |
| Brotherhood Properties Ltd | Real estate | 2020 |
| Brotton Hall Management Company Limited | Real estate | 2008 |
| Brown’S Autos Ltd | Wholesale & retail | 2022 |
| Budget Tyres (Redcar) Limited | Wholesale & retail | 2010 |
| Building & Letting Services Limited | Real estate | 1995 |
| Bunting Financial Ltd | Financial services | 2025 |
| Business on Fire Ltd | Other services | 2018 |
| Business Support Network Ltd | Administrative & support | 2025 |
| Bystone Events Ltd | Administrative & support | 2023 |
| C & B Technical Services Limited | Extraterritorial | 1998 |
| C & M Contract Services Limited | Administrative & support | 2016 |
| C a Wells Ltd | Transport & logistics | 2014 |
| C and M Eatery Ltd | Hospitality | 2025 |
| C Anderson Safety Services Limited | Public administration | 2022 |
| C D S Associates Ltd | Professional & scientific | 2011 |
| C E Recruitment Ltd | Administrative & support | 2025 |
| C Fowler Marine Services Ltd | Professional & scientific | 2025 |
| C J Motor Group Limited | Wholesale & retail | 2019 |
| C Robinsons Landscapes Limited | Administrative & support | 2017 |
| C S O Properties & Developers Ltd | Real estate | 2022 |
| C Savoy Enterprise LLP | | 2021 |
| C Savoy Properties Limited | Real estate | 2021 |