| Bobbys Booze Hartlepool Ltd | Wholesale & retail | 2026 |
| Bodrum Hairport Ltd | Other services | 2019 |
| Body Alignment Clinic Limited | Health & social care | 2020 |
| Boiler Parts Hub Limited | Wholesale & retail | 2026 |
| Bolton Grove Enterprise Limited | Information & communication | 2017 |
| Bonny and Rogue Ltd | Other services | 2025 |
| Booths Ecid Limited | Administrative & support | 2017 |
| Border Security Ltd | Administrative & support | 2021 |
| Borrelli's Delicatessen Ltd | Hospitality | 2012 |
| Borthwick & Sewell Ltd | Construction | 2024 |
| Borthwick Group (JMH) Limited | Extraterritorial | 2013 |
| Borthwick Group (Property) Limited | Administrative & support | 2020 |
| Borthwick Heating Insulation UK Ltd | Construction | 2008 |
| Borthwick Marble & Granite Ltd | Other services | 2005 |
| Borthwick Property (NE) LLP | | 2022 |
| Bossco Headland Ltd | Wholesale & retail | 2018 |
| Bosscode Ltd | Information & communication | 2019 |
| Bouncy Castles Hartlepool Limited | Arts & recreation | 2016 |
| Bouncy Kings North East Ltd | Arts & recreation | 2017 |
| Bowburn Travel Ltd | Transport & logistics | 2026 |
| Bows Properties Limited | Real estate | 2025 |
| Boxx Bar Ltd | Hospitality | 2025 |
| Bozek Transport Ltd | Transport & logistics | 2024 |
| BR Wind Ltd | Professional & scientific | 2023 |
| Bradford Self Storage Limited | Transport & logistics | 2022 |
| Bradley and Hind Ltd | Transport & logistics | 2019 |
| BRAINS2 Associates Ltd | Transport & logistics | 2026 |
| Brandon Golf Limited | Arts & recreation | 2021 |
| Braun Services (Teesside) Limited | Construction | 2012 |
| Breeze Kitchens & Joinery Ltd | Construction | 2024 |
| Brenda Road Golf & Leisure Limited | Other services | 1998 |
| Brenda Road MOT Centre Ltd | Professional & scientific | 2013 |
| Brewbox Global Limited | Hospitality | 2022 |
| BRH Media Ltd | Information & communication | 2021 |
| Brickwork Contractors UK Ltd | Construction | 2018 |
| Brickworx North East Limited | Construction | 2016 |
| Bridgemere Investments Limited | Real estate | 2023 |
| Bridle Path PUB Ltd | Hospitality | 2026 |
| Brierton Pizzeria Ltd | Hospitality | 2020 |
| Bright Spark Technical Services Ltd | Professional & scientific | 2017 |
| Brighter Days North East CIC | Education | 2021 |
| Bringing Communities Together C.I.C. | Education | 2017 |
| Britannia Property Developments Limited | Construction | 2012 |
| Brite Skye Services Ltd | Information & communication | 2022 |
| Britscareuk Ltd | Administrative & support | 2016 |
| Brobot Fuels Limited | Extraterritorial | 2011 |
| Bromilow & Wood Retail Limited | Wholesale & retail | 2019 |
| Bronswerk UK Limited | Administrative & support | 2023 |
| Bronz & Browz Ltd | Manufacturing | 2024 |
| Bronzed Bliss Ltd | Other services | 2025 |
| Brookson (5298B) Limited | Administrative & support | 2007 |
| Browns Access Consultants Ltd | Professional & scientific | 2026 |
| Bryal NE Ltd | Professional & scientific | 2020 |
| BSB Advertising Ltd | Professional & scientific | 2025 |
| BSM Retail Traders Ltd | Wholesale & retail | 2020 |
| BTG Architectural Ltd | Professional & scientific | 2023 |
| BTL Ltd | Real estate | 2025 |
| BTT Empire Delight Catering and Services Ltd | Hospitality | 2026 |
| Buccaneer Fuels Limited | Wholesale & retail | 2020 |
| Bucks Inspection Services Limited | Professional & scientific | 2007 |
| Budapest STK Limited | Hospitality | 2024 |
| Buffalo Hills Dairy Ltd | Manufacturing | 2024 |
| Build Blueprint Ltd | Construction | 2025 |
| Bunker Tech Limited | Financial services | 2023 |
| Burn Road Commercial & Car Testing Station Limited | Wholesale & retail | 2017 |
| Burn Valley Automotive Ltd | Wholesale & retail | 2017 |
| Business Park Ltd | Construction | 2023 |
| Business Premises of Hartlepool Ltd | Administrative & support | 2021 |
| Business Transformation Group Ltd | Administrative & support | 2019 |
| Butterknowle Green Management Company Limited | Real estate | 2004 |
| BV Aviation Ltd | Professional & scientific | 2024 |
| BVS (NE) Ltd | Wholesale & retail | 2025 |
| BW Fibre Ltd | Construction | 2026 |
| BW Process Solutions Limited | Professional & scientific | 2008 |
| BW Scouting Ltd | Arts & recreation | 2024 |
| BY Industrial Services Ltd | Construction | 2025 |
| C & B Business Services Ltd | Other services | 2022 |
| C & S Fitness Group Limited | Arts & recreation | 2024 |
| C & S Fitness Reformer Pilates Limited | Arts & recreation | 2024 |
| C and S Trading (North East) Limited | Wholesale & retail | 2022 |
| C B Business Services Limited | Other services | 2017 |
| C Grint Electrical Ltd | Construction | 2019 |
| C J Hydraulic Services Limited | Manufacturing | 1994 |
| C M Manning Limited | Professional & scientific | 2017 |
| C Pritchard Ltd | Health & social care | 2015 |
| C&M Properties Hartlepool Limited | Real estate | 2020 |
| C.A.J Renewable Solutions Ltd | Manufacturing | 2013 |
| C.B.L. Cable Contractors Limited | Construction | 1994 |
| C.I.DUNNING23 Ltd | Mining & quarrying | 2023 |
| C.L.L.Fabrication Ltd | Manufacturing | 2026 |
| C.S.Churchill Ltd | Construction | 2025 |
| C.W Haulage Services Limited | Transport & logistics | 2023 |
| C3 Property Consulting LLP | | 2018 |
| Cactus Products Limited | Manufacturing | 2009 |
| Cafe Cenno Ltd | Hospitality | 2012 |
| Cafe Paradiso Limited | Hospitality | 2010 |
| Caistor Logistics Limited | Water & waste | 2014 |
| Caistor Plant Hire Limited | Administrative & support | 2025 |
| Calibre Inspection Services Limited | Construction | 2024 |
| Calvert & Co Property Limited | Real estate | 2026 |