| CVH Consultants Ltd | Health & social care | 2018 |
| Cvision Recruitment Ltd | Administrative & support | 2025 |
| CVS Consulting Ltd | Wholesale & retail | 2010 |
| CVS Lincolnshire Ltd | Administrative & support | 1997 |
| CW Consultants Ltd | Other services | 2025 |
| Cwhitney Consultancy Ltd | Education | 2026 |
| Cyber Intelligence Limited | Information & communication | 2015 |
| Cyber Security Partnership LLP | | 2016 |
| Cybercurity Ltd | Information & communication | 2023 |
| Cycladi Ltd | Wholesale & retail | 2017 |
| Cyclecoach.Cc Ltd | Arts & recreation | 2024 |
| Cyclops Air Ltd | Professional & scientific | 2014 |
| Cygnet Property Group Ltd | Real estate | 2025 |
| Cynthia's Hair Ltd. | Other services | 2018 |
| Cypress Management Services Limited | Professional & scientific | 2024 |
| Cyril Fretson Ltd | Real estate | 2012 |
| D & a Discounts Limited | Wholesale & retail | 2021 |
| D & D Drylining (Lincoln) Limited | Construction | 2017 |
| D & D Marshall Ltd | Manufacturing | 2007 |
| D & G Lincoln Properties Limited | Real estate | 2003 |
| D & H Motors Garage Ltd | Wholesale & retail | 2024 |
| D & L J Wilson Farming Limited | Energy | 2019 |
| D & S Drylining Ltd | Construction | 2005 |
| D & SK Properties Ltd | Real estate | 2025 |
| D - LEC Services Lincoln Limited | Construction | 2013 |
| D B Homes Lincoln Ltd | Construction | 2013 |
| D Baptist Limited | Construction | 2024 |
| D Coldron Utilities Ltd | Construction | 2022 |
| D Cross Developments Limited | Real estate | 2002 |
| D H Plumbing & Bathrooms Limited | Construction | 2010 |
| D H Plumbing & Heating (Lincoln) Limited | Construction | 2009 |
| D Hansell Electrical Ltd | Construction | 2018 |
| D J Costin Groundworks Limited | Construction | 2010 |
| D J Costin Ltd | Wholesale & retail | 2025 |
| D J R Civils Ltd | Construction | 2025 |
| D K Skidmore Ltd | Construction | 2026 |
| D K Techniques Limited | Information & communication | 2003 |
| D Karadaglis Ltd | Health & social care | 2013 |
| D M Nagle Limited | Construction | 2007 |
| D Miles Plastering Limited | Construction | 2019 |
| D N Residential Limited | Real estate | 2017 |
| D P Wilkinson Roofing & Building Limited | Extraterritorial | 2013 |
| D R Electrical (Lincoln) Limited | Construction | 2020 |
| D Revell Services Ltd | Professional & scientific | 2020 |
| D Scott Engineering Limited | Construction | 2012 |
| D T Supplies Limited | Extraterritorial | 2021 |
| D Tear Haulage Ltd | Transport & logistics | 2024 |
| D Worsdall Engineering Limited | Manufacturing | 2013 |
| D&A Webster Mobile Mechanic Ltd | Wholesale & retail | 2023 |
| D&Ds Properties Limited | Construction | 2025 |
| D&G Couriers Ltd | Transport & logistics | 2025 |
| D&J Smith Properties Limited | Real estate | 2002 |
| D&R Drylining Limited | Construction | 2024 |
| D-Isla Limited | Wholesale & retail | 2013 |
| D. Perkins and Associates Limited | Professional & scientific | 1977 |
| D.Aje Ltd | Health & social care | 2025 |
| D.B. Studios Ltd. | Arts & recreation | 1996 |
| D.F. Meanwell Limited | Agriculture & fishing | 1973 |
| D.I.K Ltd | Construction | 2020 |
| D.R.Welbourn Ltd | Manufacturing | 2002 |
| D.U. Drive 4 YOU Ltd | Transport & logistics | 2014 |
| D.W.Harrison Limited | Agriculture & fishing | 1965 |
| D2 Projects Limited | Construction | 2010 |
| D4RBY Limited | Real estate | 2015 |
| Dabeto Holdings Limited | Professional & scientific | 2025 |
| Dack Bodyshop Ltd | Wholesale & retail | 2025 |
| Dack Commercial Bodies Ltd | Manufacturing | 2019 |
| Dack Commercial Ltd | Wholesale & retail | 2021 |
| Dack Conversions Ltd | Manufacturing | 2022 |
| Dack Group Ltd | Financial services | 2023 |
| Dack Hire Ltd | Administrative & support | 2025 |
| Dack Service Ltd | Wholesale & retail | 2025 |
| Dads Advocates C.I.C. | Education | 2022 |
| Dafydd Larcombe Limited | Transport & logistics | 2023 |
| Dairylands - Lakefront Lodges Limited | Agriculture & fishing | 2023 |
| Daisy Derek Limited | Information & communication | 2011 |
| Daisy Digital Limited | Information & communication | 2024 |
| Daisy’S Glow Ltd | Wholesale & retail | 2026 |
| Dale and Co Solicitors Limited | Professional & scientific | 2008 |
| Dales Crown Limited | Other services | 2015 |
| Daley Plastering Ltd | Construction | 2016 |
| Dalziel & POW Holdings Limited | Arts & recreation | 2017 |
| Damon Kamming Ltd | Health & social care | 2018 |
| Damon's (Developments) Limited | Professional & scientific | 1993 |
| Damon's (Holdings) Limited | Professional & scientific | 1993 |
| Damon's Motel Limited | Hospitality | 1990 |
| Damon's Restaurants (UK) Limited | Hospitality | 1986 |
| Damp and Mould Ltd | Manufacturing | 2025 |
| Damp Busters & Building Contractors Ltd | Water & waste | 2025 |
| Damp Busters Property Maintenance Ltd | Households | 2025 |
| Damsel Stone Ltd. | Information & communication | 2017 |
| DAN Melladay Motor Engineers Ltd | Wholesale & retail | 2026 |
| DAN Rendall Piano Services Ltd | Other services | 2023 |
| DAN Taylor Hair and Massage Limited | Other services | 2025 |
| DAN Taylor Wellness Spa Limited | Arts & recreation | 2026 |
| Dancole Properties Ltd | Construction | 2017 |
| Dandan Logistics Ltd | Transport & logistics | 2025 |
| Danelaw Lime and Heritage Conservation Ltd | Construction | 2025 |
| Danesgate Investments Limited | Real estate | 2022 |
| Daniel Charles Aggregates Limited | Construction | 2020 |