| Cwvw Limited | Financial services | 2020 |
| CX247 Limited | Administrative & support | 2019 |
| Cyan Property Services Limited | Real estate | 2022 |
| Cyber Coalesce Limited | Information & communication | 2023 |
| Cyber Netsec Ltd | Information & communication | 2021 |
| Cyber Property Developments Limited | Real estate | 2003 |
| Cyberfortifi Consulting Ltd | Information & communication | 2026 |
| Cyberserve UK Ltd | Information & communication | 2022 |
| Cyborg Finance Limited | Financial services | 2019 |
| Cycle Pathway CIC | Other services | 2015 |
| Cykel Yorkshire CIC | Education | 2023 |
| Cylart Limited | Construction | 2025 |
| Cymbal Central Ltd | Wholesale & retail | 2023 |
| Cyphusion Ltd | Information & communication | 2002 |
| Cyrus Decor Limited | Construction | 2003 |
| Cyrus Transport Limited | Administrative & support | 2015 |
| D & a Support Services Ltd | Other services | 2022 |
| D & G Wright Roofing and Building Limited | Construction | 2016 |
| D & N Priestley Limited | Wholesale & retail | 1988 |
| D - Laboratory Ltd | Information & communication | 2023 |
| D a Openshaw Limited | Hospitality | 2024 |
| D and R Retail Yorkshire Limited | Wholesale & retail | 2022 |
| D Burley Interior Specialists Ltd | Construction | 2012 |
| D D S W Limited | Hospitality | 2010 |
| D H Landscapes Ltd | Administrative & support | 2016 |
| D H Traders Limited | Water & waste | 2019 |
| D Hall Landscape Maintenance Ltd | Administrative & support | 2025 |
| D Jack Ltd | Real estate | 2021 |
| D K Optical Ltd | Health & social care | 2023 |
| D L Joinery Services Ltd | Manufacturing | 2020 |
| D M C Cars Ltd | Transport & logistics | 2023 |
| D M D Bespoke Interiors Limited | Construction | 2018 |
| D M T Transport Ltd | Transport & logistics | 2019 |
| D Mart Limited | Real estate | 2013 |
| D P Refrigeration Limited | Energy | 2012 |
| D Scott Project Solutions Ltd. | Administrative & support | 2018 |
| D V Restaurant Ltd | Hospitality | 2024 |
| D W Coulson Building Contractors Ltd | Construction | 2020 |
| D W M Properties Limited | Real estate | 2003 |
| D Wright Building Services Ltd | Construction | 2023 |
| D&A Threads Ltd | Other services | 2023 |
| D&A Urban Limited | Real estate | 2025 |
| D&C Cleaning (Yorkshire) Ltd | Administrative & support | 2022 |
| D&C Driving Services Limited | Transport & logistics | 2017 |
| D&G Flooring Limited | Construction | 2025 |
| D&G Renewables Limited | Professional & scientific | 2020 |
| D&J PP Ltd | Real estate | 2019 |
| D&M Arcitectural Ironmongery Limited | Wholesale & retail | 2015 |
| D&P Baxenden Ltd | Hospitality | 2023 |
| D&S Global Ltd | Wholesale & retail | 2025 |
| D'S Meat Traders Ltd | Hospitality | 2017 |
| D-Bross Ltd | Wholesale & retail | 2025 |
| D-Cinnamon Int'L Limited | Financial services | 2022 |
| D-K9 Services Ltd | Administrative & support | 2018 |
| D. Wilson Transport Limited | Transport & logistics | 2002 |
| D.A Wood Car Sales Ltd | Wholesale & retail | 2023 |
| D.A. T/A Home Pro Renovation Ltd | Construction | 2019 |
| D.A.B. Plasterers Ltd | Construction | 2018 |
| D.C. Liptrot & Co. Ltd | Construction | 2001 |
| D.J. Office Solutions Ltd. | Construction | 2010 |
| D.N.Propertylettings Ltd | Real estate | 2025 |
| D.N.T.M Ltd | Other services | 2018 |
| D.P. Packaging Services Limited | Transport & logistics | 1987 |
| D.Sirez Limited | Wholesale & retail | 2024 |
| D.W. Wood Construction Limited | Construction | 2021 |
| D.Walsh Roofing Limited | Construction | 2025 |
| D1 Enterprise Ltd. | Real estate | 2018 |
| D1 Fitness Gym Ltd | Arts & recreation | 2023 |
| D2 Bearings & Engineering Services Limited | Wholesale & retail | 2001 |
| D2F Brfd Ltd | Wholesale & retail | 2025 |
| D360 Windows & Doors Ltd | Manufacturing | 2018 |
| D7K Limited | Health & social care | 2022 |
| DA and DA Burke Properties Limited | Real estate | 2026 |
| DA Consulting Ltd | Information & communication | 2026 |
| DA Motor Group Ltd | Wholesale & retail | 2025 |
| Da'Cottage Ltd | Hospitality | 2022 |
| Daal & Roti Ltd | Hospitality | 2024 |
| DAB Estates Ltd | Real estate | 2019 |
| DAB Freight Ltd | Wholesale & retail | 2025 |
| Dabury Ltd | Wholesale & retail | 2026 |
| Dace Consulting Limited | Professional & scientific | 2006 |
| Dacres Consulting Limited | Information & communication | 2020 |
| Dacres Investments Ltd | Wholesale & retail | 2022 |
| Dada Leeds Ltd | Transport & logistics | 2022 |
| Daddy's Fried Chicken Ltd | Hospitality | 2024 |
| Dadibhais Holdings Limited | Financial services | 2008 |
| Dady and Chana Property Ltd | Real estate | 2022 |
| Dahi Properties Ltd | Real estate | 2025 |
| Dahson Developments Ltd | Construction | 2024 |
| Daibiz Ltd | Wholesale & retail | 2023 |
| Daigg.Com Ltd | Hospitality | 2026 |
| Daily Essentials Hub Ltd | Wholesale & retail | 2024 |
| Daily Fruit and Vegetable Ltd | Wholesale & retail | 2019 |
| Daily Pounds Ltd | Hospitality | 2015 |
| Daily Stock Limited | Wholesale & retail | 2019 |
| Daily Wonders Limited | Wholesale & retail | 2024 |
| Dailydazzle Limited | Wholesale & retail | 2025 |
| Dailyships Ltd | Wholesale & retail | 2026 |
| Daisy Chain Nursery Ltd | Health & social care | 1996 |
| Daisy Healthcare Resources Ltd | Health & social care | 2016 |