| Autorepair@Breaston Limited | Wholesale & retail | 2009 |
| Avakan Limited | Real estate | 2024 |
| Avenger Taxis Ltd | Transport & logistics | 2016 |
| Aventech Productions Ltd | Information & communication | 2025 |
| AVO Technical Services Ltd | Manufacturing | 2023 |
| Axis Art Limited | Extraterritorial | 2022 |
| Aztec Estate Maintenance Limited | Households | 2022 |
| Azurite EYE Ltd | Wholesale & retail | 2025 |
| B J Supplies Limited | Wholesale & retail | 2024 |
| B Kenreem Ltd | Wholesale & retail | 2026 |
| B&D Corporation Limited | Wholesale & retail | 2021 |
| Babi Plastic Ltd | Manufacturing | 2024 |
| Babylon Talent Solutions Limited | Administrative & support | 2025 |
| Badgersonset Ltd | Information & communication | 2026 |
| Baileigh Holdings Ltd | Financial services | 2025 |
| Baileys Memorials Ltd | Other services | 2023 |
| Balmoral Property Limited | Real estate | 2019 |
| Banks' Business Solutions Ltd | Professional & scientific | 2024 |
| Barbican Composite Doors Limited | Manufacturing | 2019 |
| Barbizon Trees Ltd | Administrative & support | 2026 |
| Barfield Investments Limited | Real estate | 2025 |
| Bargain Mall Ilkeston Ltd | Wholesale & retail | 2024 |
| Barrel & Slate Limited | Hospitality | 2025 |
| Barson Properties Ltd | Real estate | 2020 |
| Baskent Yasar Ltd | Hospitality | 2024 |
| Basslayerz Ltd | Arts & recreation | 2018 |
| Baxter Lloyd Developments Limited | Financial services | 2023 |
| BDS Construction Ltd | Construction | 2013 |
| BEE Helpful Ltd | Administrative & support | 2018 |
| Beecroft Property Group Ltd | Real estate | 2026 |
| Beestonia Brewing Company Ltd | Manufacturing | 2022 |
| Beetall Ltd | Transport & logistics | 2026 |
| Bella (Ilkeston) Limited | Hospitality | 2019 |
| Belvoir Property Development Ltd | Real estate | 2026 |
| Beneath Your Beautiful Photography Limited | Other services | 2018 |
| Benjamin Allen Consulting Engineers Ltd | Professional & scientific | 2023 |
| Benjamin Allen Group Limited | Construction | 2019 |
| Bennett Construction 00 Limited | Construction | 2018 |
| Bentley Property Services (Derby) Limited | Real estate | 2021 |
| Bespoke Funeral Care Ltd | Other services | 2020 |
| Best Shop News Ltd | Wholesale & retail | 2019 |
| Bevanco Limited | Administrative & support | 2026 |
| BG Asbestos Services Ltd | Professional & scientific | 2024 |
| BG Global Holdings Limited | Financial services | 2024 |
| BG Home Improvements 1 Ltd | Real estate | 2026 |
| BG Kalika Ltd | Hospitality | 2023 |
| BGB Barbershop Ltd | Other services | 2022 |
| BGS & SON Limited | Wholesale & retail | 2025 |
| BHB Technical Services Ltd | Health & social care | 2011 |
| BHF Surfacing Ltd | Construction | 2025 |
| Biscuit Babe Ltd | Wholesale & retail | 2024 |
| Bishop Securities Limited | Real estate | 2001 |
| Bistro 21 Cafe & Catering Company Ltd | Hospitality | 2026 |
| Bistro Juno Limited | Hospitality | 2025 |
| Bits and Bogs Ltd | Construction | 2019 |
| Bitter & Sweet Ltd | Manufacturing | 2023 |
| BK Accountants Limited | Professional & scientific | 2015 |
| BK Corruption Ltd | Information & communication | 2021 |
| BK Reviews Ltd | Administrative & support | 2019 |
| BK Secrets Ltd | Professional & scientific | 2020 |
| BK Shop Ltd | Wholesale & retail | 2023 |
| Bkmr Lifts Ltd | Manufacturing | 2021 |
| Black and Stainless Creative Metalwork Limited | Manufacturing | 2022 |
| Blackpool Global Limited | Construction | 2024 |
| Blaize Holdings Ltd | Administrative & support | 2017 |
| Blanksrus Wholesale Ltd | Wholesale & retail | 2021 |
| Blue Bear Day Care Ltd | Health & social care | 2025 |
| Blue Moon Shop Ltd | Wholesale & retail | 2024 |
| Blue Sky Recycling Limited | Water & waste | 2017 |
| Bluechant Limited | Construction | 1999 |
| BMJ Plumbing and Heating Services Limited | Construction | 2025 |
| Bojans Engineering Limited | Manufacturing | 2020 |
| Boldframe Creative Ltd | Information & communication | 2026 |
| Bosworth Farms Ltd | Agriculture & fishing | 2023 |
| Bottle Kiln Buttery Cafe Limited | Hospitality | 2003 |
| Bottle Kiln Retail Limited | Wholesale & retail | 2003 |
| Boulter Electrical Limited | Construction | 2014 |
| Bournville Asset Management Ltd | Real estate | 2014 |
| Boxcheck Ltd | Construction | 2025 |
| Boyd's Blinds Derbyshire Ltd | Construction | 2022 |
| BPY Development Limited | Real estate | 2014 |
| Brad and Jess Properties Ltd | Real estate | 2025 |
| Bradshaw Engineering Solutions Ltd | Professional & scientific | 2022 |
| Bramton Estates Limited | Real estate | 2017 |
| Brandrick Accountancy Services Limited | Professional & scientific | 2002 |
| Brazilian Pizza Ltd | Hospitality | 2023 |
| Break Hospitality Ltd | Hospitality | 2026 |
| Breasley ( UK ) Limited | Manufacturing | 2020 |
| Brew Coffee House Ltd | Hospitality | 2025 |
| Bridge Lifts (UK) Limited | Manufacturing | 2014 |
| Bridge Street 1968 Limited | Financial services | 2014 |
| Britchoice Ltd | Wholesale & retail | 2025 |
| Broadstone Healthcare Limited | Financial services | 2024 |
| Brown and White Toast Ltd | Hospitality | 2015 |
| Brupen Motors Limited | Wholesale & retail | 1976 |
| Bsnw Ltd | Professional & scientific | 2020 |
| Bubble Fragrance Limited | Administrative & support | 2024 |
| Buckley and White Ltd | Real estate | 2025 |
| Built by Balmer Limited | Other services | 2024 |
| Bulan Property Limited | Real estate | 2024 |