| Baileys Bistro and Cafe Limited | Hospitality | 2024 |
| Baileys Stylish Kitchens Limited | Manufacturing | 2022 |
| Baileys Transportation UK Limited | Transport & logistics | 2025 |
| Bailwood Trustee Limited | Extraterritorial | 2024 |
| Bainton Stop Ltd | Wholesale & retail | 2023 |
| Baird & Tatlock Limited | Professional & scientific | 1966 |
| Baitson Engineering Services Ltd | Construction | 2026 |
| Baitsons Limited | Extraterritorial | 2012 |
| Bajwauk Limited | Wholesale & retail | 2026 |
| BAK Cleaning Service Limited | Administrative & support | 2025 |
| Bakehouse Studio Ltd | Information & communication | 2014 |
| Baker & Savage Ltd | Real estate | 2020 |
| Baker Commerce Ltd | Wholesale & retail | 2026 |
| Baker Street Central (RTM) Limited | Households | 2023 |
| Baker Street Garage (2007) Limited | Wholesale & retail | 2007 |
| Baker Street Pubs Limited | Hospitality | 2010 |
| Bakers Bar Ltd | Hospitality | 2022 |
| Balaji Sales & Lettings Ltd | Real estate | 2026 |
| Balanced Books Accounting Limited | Professional & scientific | 2025 |
| Balarisi 585 Ltd | Hospitality | 2025 |
| Balcon Cafe Limited | Hospitality | 2022 |
| Baldwin Glass (Holdings) Limited | Financial services | 2023 |
| Baldwin's Cafe Ltd | Hospitality | 2024 |
| Baldwins Bespoke Joinery Ltd | Construction | 2024 |
| Bali Bronze Tanning and Beauty Salon Ltd | Other services | 2025 |
| Ballers Soccer Academy Ltd | Arts & recreation | 2022 |
| Ballistic Blue Limited | Information & communication | 2003 |
| Balloon Bonanza Ltd | Wholesale & retail | 2025 |
| Balms Properties Ltd | Real estate | 2024 |
| Baltic Amber Foods Ltd | Hospitality | 2024 |
| Baltic Blaze Firewood Limited | Wholesale & retail | 2024 |
| Baltic Caravan Trade Limited | Wholesale & retail | 2012 |
| Baltikana Ltd | Wholesale & retail | 2011 |
| Baltyk International Limited | Wholesale & retail | 2016 |
| Balyozsisko Ltd | Hospitality | 2026 |
| Bambu.Ai Ltd | Professional & scientific | 2025 |
| Bameen CIC | Professional & scientific | 2019 |
| Bamzan Ltd | Transport & logistics | 2020 |
| Bandwood Limited | Professional & scientific | 2005 |
| Bangla Takeaway Ltd | Extraterritorial | 2019 |
| Banjos Boozers Ltd | Hospitality | 2025 |
| Banks Cooper Associates Ltd | Professional & scientific | 2002 |
| Bankside Business Park Limited | Real estate | 2021 |
| Bankside Cafe Hull Ltd | Hospitality | 2025 |
| Banners Investment Limited | Financial services | 2025 |
| Bapp Industrial Supplies (Hull) Limited | Wholesale & retail | 1984 |
| Baps Group Ltd | Real estate | 2023 |
| Bar@Theclub Ltd | Hospitality | 2025 |
| Barakah Foods (Hull) Limited | Wholesale & retail | 2025 |
| Barbara B (Hull) Limited | Administrative & support | 2019 |
| Barber Livestock Transport Ltd | Transport & logistics | 2026 |
| Barbershop Collective (Hull) Ltd | Other services | 2025 |
| Barclay Smith Estates Ltd | Real estate | 2022 |
| Barcode Solutions (Europe) Limited | Information & communication | 2005 |
| Bardale (Services) Limited | Professional & scientific | 2012 |
| Bardovillek Services Limited | Agriculture & fishing | 2025 |
| Bare Face Beauty Bar Ltd | Other services | 2025 |
| Barek Lift Trucks Limited | Manufacturing | 1996 |
| Bargain Foods Ltd | Wholesale & retail | 2021 |
| Bargain Line 1 Limited | Wholesale & retail | 2022 |
| Barham Assets Limited | Real estate | 2025 |
| Barimah&Son Ltd | Health & social care | 2024 |
| Barker & Grantham Limited | Wholesale & retail | 2002 |
| Barker & Patterson | | 1999 |
| Barker & Simpkins (Hull) Limited | Manufacturing | 2006 |
| Barker and Patterson (UK) Limited | Manufacturing | 2001 |
| Barker Instruments Ltd | Professional & scientific | 2024 |
| Barkers Window Blinds Limited | Construction | 2007 |
| Barkwood Properties Limited | Real estate | 1999 |
| Barleys Vegan Eateries Ltd | Wholesale & retail | 2020 |
| Barlow (Hull) Limited | Construction | 2015 |
| Barlow Wholesale Limited | Wholesale & retail | 2025 |
| Barmston Catering Ltd | Hospitality | 2011 |
| Barmston Timber Limited | Manufacturing | 2023 |
| Baron & Thompson Limited | Real estate | 2022 |
| Barracuda Fisheries Limited | Hospitality | 2006 |
| Barrass (Hull) Limited | Manufacturing | 2002 |
| Barrass Whiting LLP | | 2021 |
| Barrier Beaters Ltd | Information & communication | 2020 |
| Barrington Estates Group Ltd | Real estate | 2024 |
| Barrobri Limited | Administrative & support | 2016 |
| Barry Crux & Company Limited | Real estate | 2010 |
| Barry Stapleton John Civils Limited | Construction | 2022 |
| Bart Composite Builder Ltd | Manufacturing | 2025 |
| Bartholomew Property Group Ltd | Real estate | 2022 |
| Bartlett Joinery & Building Limited | Construction | 2026 |
| Barton Car Wash Limited | Other services | 2018 |
| Barwick Co. Ltd | Construction | 2024 |
| Barwick Media Ltd | Professional & scientific | 2025 |
| Barz Ltd | Information & communication | 2025 |
| Basics Supplies Ltd | Professional & scientific | 2025 |
| Bassetts Investments Limited | Professional & scientific | 1998 |
| Bassetts of Hull Limited | Water & waste | 2008 |
| Bastion Associates Group Ltd | Information & communication | 2025 |
| Bathroom Supplies Online Limited | Wholesale & retail | 2005 |
| Batson Limited | Hospitality | 2019 |
| Battle Ready Bits Limited | Wholesale & retail | 2025 |
| Bauer Energy Limited | Construction | 2025 |
| Bauer Engineering Limited | Construction | 2022 |
| Baukasten Ltd | Construction | 2025 |