| Crystal Plastics Limited | Manufacturing | 2005 |
| CS Electrical (Sheffield) Limited | Construction | 2006 |
| Csjs Properties Limited | Real estate | 2022 |
| CSL Contract Services Limited | Professional & scientific | 2003 |
| CTF Environment Training Limited | Education | 2013 |
| CUPRO29 Limited | Professional & scientific | 2018 |
| Curvana Limited | Financial services | 2025 |
| CWL Hairdressing Limited | Other services | 2022 |
| D & N Star Yachting Limited | Arts & recreation | 2010 |
| D & S Properties (Yorkshire) Limited | Real estate | 2021 |
| D H Auto Services Limited | Wholesale & retail | 2008 |
| D T Filling Stations Limited | Construction | 1996 |
| D&L Jarvis Ltd | Construction | 2022 |
| Dachaigh Building Design Limited | Construction | 2021 |
| Dalevine Limited | Real estate | 2008 |
| Damdrumz Music Enterprises Ltd | Wholesale & retail | 2026 |
| Danelock Properties Ltd | Real estate | 2020 |
| Dante Commercial Property Ltd | Construction | 2022 |
| Dante Floor Ltd | Construction | 2023 |
| Dante Foods Ltd | Wholesale & retail | 2023 |
| Dante Group Holdings Limited | Financial services | 2024 |
| Dante Logistics Ltd | Transport & logistics | 2023 |
| Dante Property Group Ltd | Real estate | 2021 |
| Dantecorp (UK) Ltd | Wholesale & retail | 2015 |
| Danum Disputes UK Ltd | Professional & scientific | 2023 |
| Dave Dunn Properties Ltd | Real estate | 2023 |
| Davis Hughes (Civic Quarter) Ltd | Real estate | 2022 |
| Davis Hughes Holdings Limited | Real estate | 2022 |
| Davis Hughes Investments Limited | Real estate | 2017 |
| Davis Hughes Limited | Real estate | 2014 |
| Davis Hughes Living Limited | Real estate | 2020 |
| Davis Hughes Maintenance Limited | Construction | 2021 |
| Davis Hughes Property Holdings Limited | Financial services | 2023 |
| Davis Hughes Property Limited | Real estate | 2018 |
| Day 'N' Night Apparel Limited | Wholesale & retail | 2025 |
| DBT Lounge Ltd | Education | 2025 |
| DE Facto Group Ltd | Wholesale & retail | 2016 |
| DE Hood CIC | Health & social care | 2016 |
| Deaks Engineering Limited | Professional & scientific | 2024 |
| Dearne Valley Dyslexia Ltd | Education | 2023 |
| Debonair (Northern) Holdings Limited | Financial services | 2021 |
| Debonair (Northern) Limited | Wholesale & retail | 2001 |
| Deefor Property Rentals Ltd | Real estate | 2020 |
| Deep Electronics Ltd | Wholesale & retail | 2021 |
| Delta Decorating Ltd | Construction | 2026 |
| Denim House Fashion Ltd | Wholesale & retail | 2022 |
| Dependable Roofing Specialists Limited | Construction | 2026 |
| Derek Leech Limited | Wholesale & retail | 2009 |
| Dertoni Ltd | Administrative & support | 2019 |
| Design Scaffolding UK Limited | Construction | 2014 |
| Destiny Jubilee Care Limited | Public administration | 2021 |
| Detectable Products UK Limited | Wholesale & retail | 2002 |
| DF Gardens and Maintenance Ltd | Administrative & support | 2023 |
| DFW Building Services Limited | Construction | 2024 |
| DHW Renovating & Building Limited | Construction | 2014 |
| Diesel Plant Services Limited | Manufacturing | 1995 |
| Diffraction Films Ltd | Information & communication | 2018 |
| Dinky Feet Ltd | Professional & scientific | 2016 |
| Direct Care (Yorkshire) Ltd | Health & social care | 2019 |
| Discount Food Centre Ltd | Wholesale & retail | 2018 |
| Discounted Mobility Scooters Limited | Wholesale & retail | 2023 |
| Discover Lettings Ltd | Real estate | 2026 |
| Diveroid Ltd | Wholesale & retail | 2025 |
| Dixon Properties (North) Limited | Real estate | 2021 |
| DLC Management Limited | Real estate | 2024 |
| Dlceand Ltd | Professional & scientific | 2025 |
| DLS Rail Limited | Manufacturing | 2019 |
| DM & EE Ltd | Wholesale & retail | 2022 |
| DM Joinery Doors and Flooring Ltd | Manufacturing | 2020 |
| Dmat Systems Limited | Other services | 1997 |
| Dolcliffe Community Group | Other services | 2001 |
| DON Gabi Ltd | Transport & logistics | 2022 |
| Doncaster Car Sales Ltd | Wholesale & retail | 2019 |
| Doncaster Golden FRY Ltd | Hospitality | 2020 |
| Doncaster Residential Limited | Real estate | 2023 |
| Doncaster Sunbed Hire Limited | Other services | 2022 |
| Dooney Property Ltd | Real estate | 2024 |
| Doorway to Dorkness Limited | Wholesale & retail | 2021 |
| Doriscon Ltd | Real estate | 2013 |
| Dotfind Recruitment Limited | Administrative & support | 2024 |
| Dove Leading Eagle Enterprises Ltd | Administrative & support | 2019 |
| Drain Solutions (Northern) Limited | Water & waste | 2023 |
| Dray Luggage Limited | Manufacturing | 2002 |
| Dream UK Land Limited | Real estate | 2024 |
| Drive Away Motors Ltd | Wholesale & retail | 2019 |
| Drop ONZ Ltd | Wholesale & retail | 2025 |
| Drywall Dynamics Limited | Construction | 2026 |
| DS Real Estate Investments Ltd | Real estate | 2020 |
| DSW Kitchens (Yorkshire) Ltd | Manufacturing | 2024 |
| Dunwood Developments Ltd | Real estate | 2023 |
| DUO Beauty Academy Limited | Other services | 2025 |
| DUO Beauty Clinic Limited | Education | 2023 |
| DW Financial Consultants Ltd | Other services | 2014 |
| DW Roofing & Fascias Limited | Construction | 2025 |
| Dylan Middleton Ltd | Construction | 2024 |
| E & L Training Limited | Education | 2024 |
| E & S Beds Limited | Wholesale & retail | 2014 |
| E S W Developments Limited | Professional & scientific | 1990 |
| Eagle Light Haulage Ltd | Transport & logistics | 2019 |
| Earth Haus Limited | Construction | 2023 |