| Blacksmith LI Ltd | Hospitality | 2018 |
| Blended Products Limited | Manufacturing | 2003 |
| Blossom Beauty Bar Ltd | Other services | 2026 |
| Blue Yonder Books Ltd | Arts & recreation | 2020 |
| Bluebell Functions Ltd | Hospitality | 2025 |
| Blueprint Education Ltd | Education | 2015 |
| BON Appetit Specialised Wedding Caterers Ltd | Hospitality | 2012 |
| Boston HAN Ltd | Real estate | 2018 |
| Botanical Engineers Ltd | Education | 2021 |
| Boxxen Group Limited | Financial services | 2026 |
| BPS Haulage Ltd | Transport & logistics | 2025 |
| Breffney Limited | Real estate | 2014 |
| BRG Burgers Ltd | Hospitality | 2025 |
| Brian Precious Engineering Limited | Professional & scientific | 2019 |
| Brian's DIY Limited | Wholesale & retail | 2003 |
| Brigg Barber Ltd | Other services | 2023 |
| Brigg Bookkeeping Ltd | Professional & scientific | 2023 |
| Brigg Car Wash Limited | Administrative & support | 2022 |
| Brigg Hand Car Wash Ltd | Administrative & support | 2026 |
| Brigg Haulage Limited | Transport & logistics | 2002 |
| Brigg Medical Ltd | Health & social care | 2011 |
| Brigg Mobility Ltd | Wholesale & retail | 2018 |
| Brigg MOT Centre Ltd | Wholesale & retail | 2002 |
| Brigg Office Supplies Limited | Wholesale & retail | 2003 |
| Brigg Prints Limited | Wholesale & retail | 2025 |
| Brigg Properties Ltd | Real estate | 2014 |
| Brigg Town Football Club CIC | Education | 2017 |
| Brigg Van Breakers Limited | Wholesale & retail | 2019 |
| BRIGGSTORE2 Ltd | Wholesale & retail | 2025 |
| Britman UK Ltd | Manufacturing | 2019 |
| Brixx Gym Ltd | Arts & recreation | 2021 |
| Broadins Park Limited | Construction | 2002 |
| Brod Davis Financial Planning Limited | Financial services | 2007 |
| Brodick Holdings Limited | Real estate | 2021 |
| Broxhaul Limited | Transport & logistics | 2014 |
| Burford House Garden Store Limited | Wholesale & retail | 2012 |
| BW Shrimpton Limited | Construction | 1994 |
| BY Emma Richards Ltd | Professional & scientific | 2026 |
| Byram Locum Services Ltd | Hospitality | 2025 |
| C & W Haulage Services Ltd | Transport & logistics | 2025 |
| C Bowskin Joinery Limited | Construction | 2025 |
| C Dawson & Sons Limited | Wholesale & retail | 2010 |
| C H Car and Commercial Ltd | Wholesale & retail | 2021 |
| C L Salmon Holdings Limited | Financial services | 2020 |
| C V C I Limited | Construction | 2018 |
| C.L.S. Demolition Limited | Construction | 1972 |
| Cadas Limited | Administrative & support | 1991 |
| Carst & Co. Limited | Real estate | 1996 |
| Cartair Ltd | Construction | 2016 |
| Castell Development Ltd | Construction | 2020 |
| Cater ME Tasty Ltd | Hospitality | 2026 |
| Cathedral Court Management Company (Scunthorpe) Limited | Households | 1990 |
| Cazadore Ltd | Information & communication | 2015 |
| CB X JH Collective Ltd | Wholesale & retail | 2025 |
| CDW Engineering Ltd | Professional & scientific | 2025 |
| Ceestave Ltd | Health & social care | 2024 |
| Chadmorgan Operations Limited | Information & communication | 2020 |
| Chef's Hell Limited | Hospitality | 2023 |
| Chidzytainment Ltd | Information & communication | 2023 |
| Chilli Storm Productions Ltd | Other services | 2026 |
| China Garden Brigg Ltd | Hospitality | 2026 |
| Chloe Danielle Creative Ltd | Professional & scientific | 2025 |
| Chris Brodley Services Limited | Construction | 1999 |
| Churchgate Limited | Real estate | 2003 |
| Claddagh Haulage Limited | Transport & logistics | 2014 |
| Class 6 Bar SC Ltd | Real estate | 2021 |
| CLASS6 Bar Limited | Real estate | 2012 |
| Classic Leather Fobs Limited | Manufacturing | 2011 |
| Clear Brew Scunthorpe & Grimsby Limited | Hospitality | 2019 |
| Clear Space Property Services Lincolnshire Ltd | Transport & logistics | 2026 |
| Click Away Ltd | Professional & scientific | 2010 |
| Cliff & Co Construction Ltd | Construction | 2023 |
| Clixby Active Pro Sports Ltd | Arts & recreation | 2017 |
| CLS Civil Engineering Limited | Construction | 2002 |
| Cmqc Limited | Information & communication | 2023 |
| Coaching for Procurement Ltd | Professional & scientific | 2022 |
| Coastline Roofing Limited | Construction | 2023 |
| Collegefarm Limited | Health & social care | 2019 |
| Colourmatch Mobile Auto Paint Repairs Ltd | Other services | 2014 |
| Commercial Farmers Group Ltd | Agriculture & fishing | 2015 |
| Concept Decarbonisation Solutions Ltd | Professional & scientific | 2024 |
| Coolblend Limited | Manufacturing | 2019 |
| Copper Beech Restaurants Ltd | Hospitality | 2014 |
| Corbiere Accounting Services Ltd | Professional & scientific | 2009 |
| Cottage Accountancy Limited | Professional & scientific | 2019 |
| Coulson Contracts Limited | Professional & scientific | 2024 |
| CPL Properties NO.1 Limited | Real estate | 2013 |
| CPL Properties NO.2 Limited | Real estate | 2013 |
| CPL Properties NO.3 Limited | Real estate | 2015 |
| Crafted by Storzy Ltd | Wholesale & retail | 2023 |
| Cranidge Holdings Limited | Real estate | 2015 |
| Creactiv CIC | Education | 2023 |
| Creative Kind North Lincolnshire CIC | Education | 2026 |
| Crosby Developments (Brigg) Limited | Real estate | 2005 |
| Crownship Developments Limited | Manufacturing | 1988 |
| Crumb Believable Ltd | Hospitality | 2025 |
| Culturematrix Ltd | Professional & scientific | 2026 |
| Cutts Property Development Limited | Real estate | 2022 |
| Cutts Transport Limited | Transport & logistics | 2014 |
| CW Accounts Limited | Professional & scientific | 2014 |