| Arwyn Properties LLP | | 2016 |
| Ashes and Sparks Limited | Professional & scientific | 1999 |
| Ashley Percival Illustrator Ltd | Arts & recreation | 2019 |
| Ashtons (Truro) Limited | Other services | 2003 |
| ASR Management Consultants Inc. Limited | Professional & scientific | 2025 |
| Assura Safety Limited | Information & communication | 2026 |
| Astiveri Cleaning Services Ltd | Administrative & support | 2025 |
| ATG Plumbing & Heating Ltd | Construction | 2018 |
| Athena Success Ltd | Professional & scientific | 2023 |
| Atlantic Hotel (1892) Limited | Hospitality | 2025 |
| Atlantic Soul Ltd | Wholesale & retail | 2023 |
| Atlantis HD Limited | Information & communication | 2010 |
| Audana Limited | Information & communication | 2008 |
| Audio and Cinema .Co.Uk Limited | Wholesale & retail | 2010 |
| Audio and Cinema Experience Ltd | Wholesale & retail | 2002 |
| Audio Cinema Ltd | Wholesale & retail | 2018 |
| Audio Source Ltd | Administrative & support | 2007 |
| Automotive Body Works Ltd | Wholesale & retail | 2015 |
| AVA Nails Spa Limited | Other services | 2023 |
| Avalennek Cabins Ltd | Extraterritorial | 2024 |
| Avenue Road Falmouth Management Co Limited | Real estate | 1992 |
| Avigna Solutions Limited | Information & communication | 2018 |
| Awlb Ltd | Financial services | 2022 |
| Awna Deli Ltd | Wholesale & retail | 2021 |
| Ayliffe Associates Limited | Professional & scientific | 2019 |
| Azure Global Ltd | Professional & scientific | 2025 |
| B H (Falmouth) Limited | Hospitality | 2018 |
| B&R Real Estate Limited | Real estate | 2016 |
| B'S Coffee Corner Ltd | Hospitality | 2026 |
| B24 Red & Black Taxis Ltd | Transport & logistics | 2024 |
| BAD Wolf Horizon Ltd | Other services | 2018 |
| Balvernie Holdings Limited | Financial services | 2023 |
| Balvernie Ltd | Financial services | 2016 |
| Banglamukhi Limited | Hospitality | 2015 |
| Bar Mine Ltd | Wholesale & retail | 2024 |
| Bark & Bumble Ltd | Wholesale & retail | 2024 |
| Barrie Philpott Electrical Limited | Construction | 2018 |
| Barsin Limited | Professional & scientific | 2025 |
| Base Falmouth Ltd | Hospitality | 2024 |
| BB Dermatology Limited | Health & social care | 2016 |
| BCD Studio Ltd. | Information & communication | 2015 |
| BD 6074 Ltd | Administrative & support | 2009 |
| Bear Behind YOU Ltd | Information & communication | 2020 |
| Beardageddon Ltd | Professional & scientific | 2019 |
| Beerwolf Books Ltd | Hospitality | 2014 |
| Bela Developments Limited | Construction | 2017 |
| Bemgo Limited | Administrative & support | 2010 |
| Benevolence Ltd | Extraterritorial | 2018 |
| Bennett Engineering Design Limited | Professional & scientific | 2007 |
| Bennett Gym (Helston) Ltd | Arts & recreation | 2025 |
| Bennett Gym Ltd | Arts & recreation | 2024 |
| Benyon Service Management Ltd | Information & communication | 2018 |
| Berryman Construction Ltd | Construction | 2019 |
| Beside the Wave Limited | Wholesale & retail | 2000 |
| Better OFF Buying Ltd | Wholesale & retail | 2022 |
| Bevans Enterprise Ltd | Real estate | 2021 |
| Bhad Publicity Ltd | Administrative & support | 2018 |
| Bickland Water Cottages Ltd | Households | 2023 |
| Bigdawgs Ltd | Wholesale & retail | 2022 |
| Biglin Lowe Accountants Ltd | Professional & scientific | 2020 |
| Billson Investments Limited | Real estate | 1963 |
| BIO Pure Technology Ltd | Manufacturing | 1998 |
| Biohellenika Bioscience Ltd | Professional & scientific | 2016 |
| Birdie Bays Group Ltd | Arts & recreation | 2025 |
| Bishop Rock Ltd | Real estate | 2021 |
| Bite Services Ltd | Health & social care | 2020 |
| BJ Sherriff Ltd | Manufacturing | 2018 |
| Black Geko Media Ltd | Professional & scientific | 2014 |
| Blackdog Haircutters Ltd | Other services | 2009 |
| Blackrock Fire & Security Solutions Ltd | Professional & scientific | 2020 |
| Blast and Spray Limited | | 1980 |
| Bloc Cornwall Group Limited | Financial services | 2020 |
| Bloc Cornwall Holdings Limited | Real estate | 2022 |
| Bloomtown Ltd | Manufacturing | 2018 |
| Blue Kite Environmental Consultancy Limited | Professional & scientific | 2014 |
| Blue Satchel Limited | Professional & scientific | 2016 |
| Blue Sky Event Management Limited | Hospitality | 2013 |
| Blue Tide Developments Ltd | Construction | 2021 |
| Bluefin Digital Ltd | Information & communication | 2011 |
| Blueprint Kitchens Limited | Manufacturing | 2016 |
| Bluewater Projects Limited | Construction | 2017 |
| BNB Digs Ltd | Real estate | 2024 |
| BNB2 Ltd | Hospitality | 2022 |
| Boconnion Limited | Arts & recreation | 2021 |
| Bolt Vintage Ltd | Wholesale & retail | 2024 |
| Bomax Construction Limited | Construction | 2018 |
| BOO Koos Ltd | Hospitality | 2019 |
| Boom Circus Ltd | Arts & recreation | 2018 |
| Bosanath Investments Ltd | Real estate | 2024 |
| Boslowick Community Garage Limited | Administrative & support | 2009 |
| Boslowick Garage Limited | Administrative & support | 1979 |
| Bosvale Community Association Limited | Other services | 2015 |
| Bosvarren Properties Limited | Real estate | 2000 |
| Botanical Atelier Limited | Wholesale & retail | 2021 |
| Bowman Yacht Charters Ltd | Transport & logistics | 2015 |
| Bowman Yachts Limited | Manufacturing | 2002 |
| Boxbot Limited | Extraterritorial | 2016 |
| BPA Recruitment Ltd | Administrative & support | 2023 |
| Brammar Careers Consultancy Limited | Professional & scientific | 2017 |
| Brand Audits Limited | Professional & scientific | 1996 |