| Consult ACA 76 Limited | Professional & scientific | 2025 |
| Consum Group Ltd | Administrative & support | 2022 |
| Continental Composites Ltd | Manufacturing | 2019 |
| Conversation Piece (UK) Limited | Other services | 1990 |
| Coolflo Clothing Co. Limited | Wholesale & retail | 2013 |
| Coombe Park RBC Limited | Construction | 2012 |
| Coopers Design & Build Ltd | Construction | 2012 |
| Copper West Partners Limited | Financial services | 2024 |
| Coppice Hill Management Co Ltd | Households | 2026 |
| Cornucopia Seven Ltd | Wholesale & retail | 2026 |
| Cornwell SP Limited | Wholesale & retail | 2020 |
| Coronado Interiors Ltd | Professional & scientific | 2018 |
| Coronation Film Partners LLP | | 2011 |
| Coronide Limited | Professional & scientific | 2014 |
| Cortexbio Limited | Professional & scientific | 2024 |
| Cosro Limited | Extraterritorial | 2001 |
| Costiere Properties Limited | Construction | 2017 |
| Cottered Consulting Ltd | Professional & scientific | 2016 |
| Cpwgco 1 Limited | Extraterritorial | 2009 |
| Crawfurd Trading Limited | Professional & scientific | 2003 |
| Creek Consultants Limited | Information & communication | 2021 |
| Creos Property Limited | Real estate | 2019 |
| Crepe Salut Limited | Hospitality | 2022 |
| Crestfield Homes Ltd | Construction | 2025 |
| Crime Project Limited | Information & communication | 2014 |
| Crooked Rain Consulting Ltd | Professional & scientific | 2023 |
| Croxley Green Property Limited | Real estate | 2014 |
| Cryptomediagrp Ltd | Professional & scientific | 2021 |
| Crystalclear Shutters Limited | Manufacturing | 2018 |
| CS7 Promotions Limited | Arts & recreation | 2026 |
| CSA Trading Ltd | Hospitality | 2009 |
| Cupola Limited | Construction | 2024 |
| Cyberflare Limited | Information & communication | 2022 |
| Cybermystic Ltd | Information & communication | 2024 |
| Czech School Surrey CIC | Education | 2023 |
| D & G London Limited | Construction | 2005 |
| D Amass Electrical Ltd | Construction | 2018 |
| D Jones Golf Academy Limited | Education | 2022 |
| D Sash Windows Ltd | Wholesale & retail | 2012 |
| D&G (Thames Ditton) Limited | Real estate | 2014 |
| D'Abernon Wood Estate Management Company Limited | Households | 2020 |
| D10 Card Collective Limited | Wholesale & retail | 2026 |
| D16 Property Group Limited | Real estate | 2025 |
| D2C Capital Ltd | Wholesale & retail | 2016 |
| DAN the MAN Deals Ltd | Wholesale & retail | 2025 |
| Danebury Property Management Ltd | Real estate | 2022 |
| Daneshill Homes Limited | Construction | 2026 |
| Dang Plant Hire Ltd | Administrative & support | 2022 |
| Danny Care Limited | Other services | 2009 |
| Darby Holmes Ltd | Construction | 2022 |
| Darby Holmes Project Management Ltd | Construction | 2026 |
| Dave J Hughes Ltd | Information & communication | 2019 |
| David Mhlabane Limited | Information & communication | 2024 |
| David Seyfried Limited | Wholesale & retail | 2002 |
| Davies Taylor Osteopaths Limited | Health & social care | 2015 |
| Davy Stone Contractors and Consultants Limited | Administrative & support | 2010 |
| Dbrg Limited | Information & communication | 2009 |
| DC Electrical (Surrey) Limited | Manufacturing | 2023 |
| DCW Consulting Limited | Professional & scientific | 2022 |
| Dearborn Consulting Ltd | Information & communication | 2012 |
| Debrett’S Education Limited | Education | 2022 |
| Deep Sea Pilots Holdings Limited | Financial services | 2019 |
| Deep Sea Pilots Limited | Financial services | 2016 |
| Definition Management Ltd | Professional & scientific | 2015 |
| Delivering Sustainable Buildings UK Ltd | Construction | 2023 |
| Deltaos Limited | Information & communication | 2026 |
| Dentaderma Aesthetic Ltd | Health & social care | 2022 |
| Derek Picot Consulting Ltd | Professional & scientific | 2024 |
| Dervaleen Estates Limited | Real estate | 2023 |
| Designsbymehak Ltd | Real estate | 2023 |
| Deus Duck Ltd | Information & communication | 2025 |
| Devesta Limited | Real estate | 2024 |
| Devonshire Limited | Real estate | 2000 |
| Devoted Studios Ltd | Professional & scientific | 2023 |
| Dewar Board Advisory Limited | Administrative & support | 2020 |
| Dexterity Marketing Execution Ltd | Administrative & support | 2016 |
| DGN Professional Ltd | Health & social care | 2010 |
| Dgray Enterprise Limited | Professional & scientific | 2021 |
| Diabetology (UK) Ltd | Professional & scientific | 2004 |
| Dianthus Limited | Real estate | 2021 |
| DIB DAB Art Club Ltd | Arts & recreation | 2014 |
| Dibe Properties Ltd | Real estate | 2024 |
| Dibling Legacy Limited | Professional & scientific | 2025 |
| Diener Dean Limited | Professional & scientific | 2013 |
| Digital Media Advertising Ltd | Information & communication | 2001 |
| Digitalfin Ltd | Professional & scientific | 2026 |
| Diniwe One Limited | Extraterritorial | 1999 |
| Diniwe Two Limited | Extraterritorial | 1999 |
| Dinki Dino Limited | Manufacturing | 2023 |
| Diplomat Tailoring Ltd | Wholesale & retail | 2022 |
| Dixey Limited | Extraterritorial | 1967 |
| DM10 Promotions Limited | Arts & recreation | 2025 |
| DNC Croydon Limited | Hospitality | 2020 |
| Dochas Properties Limited | Real estate | 2017 |
| Docstor Limited | Wholesale & retail | 2005 |
| Dominic Marcus Financial Consulting Ltd | Financial services | 2016 |
| DOOR75 Limited | Manufacturing | 2016 |
| Dorking Floors Limited | Construction | 1968 |
| Double D Consulting Limited | Professional & scientific | 2016 |
| Douglas Elliott Investments Limited | Real estate | 2023 |