| Clare Barnett Saddlefitting Limited | Professional & scientific | 2014 |
| CLG Investments Limited | Real estate | 2020 |
| Climaxx Scaffolding Ltd | Construction | 2025 |
| Clockwork Films Limited | Information & communication | 2020 |
| Colin West Mortgage Solutions Limited | Financial services | 2016 |
| Collier & Dobson Limited | Information & communication | 2004 |
| Comedy Kerfuffle Ltd | Arts & recreation | 2023 |
| Commercial Consultants (Wellington) Limited | Hospitality | 1990 |
| Conceptor Holdings Limited | Financial services | 2017 |
| Conceptor LLP | | 2017 |
| Conduit Innovation Ltd | Information & communication | 2011 |
| Consult PWK Limited | Information & communication | 2019 |
| Consumercover Limited | Information & communication | 2021 |
| Cook & Associates Design Consultants Limited | Professional & scientific | 1998 |
| Cookbridge Limited | Hospitality | 1984 |
| Cooks Living Spaces Ltd | Households | 2025 |
| Copper Kettle Residents Management Limited | Households | 1998 |
| Copperstuff Limited | Extraterritorial | 2017 |
| Corintech Limited | Manufacturing | 1977 |
| Corner Court Limited | Real estate | 2010 |
| Cosmos Property Group Limited | Real estate | 2022 |
| Cottage Pizzas Ltd | Hospitality | 2024 |
| Courtney Psychiatry Limited | Real estate | 2013 |
| CPD Essentials Limited | Professional & scientific | 2013 |
| Crag Hall (Freehold) Limited | Households | 2007 |
| CRG Security Ltd | Administrative & support | 2025 |
| Crow Magna Ltd | Real estate | 2024 |
| Crow Massive Ltd | Administrative & support | 2024 |
| Crunchx Ltd | Professional & scientific | 2017 |
| Cubera Solutions Limited | Professional & scientific | 2015 |
| Cumersdale and Associates Ltd | Construction | 2019 |
| Cybermarvin.Ai Limited | Information & communication | 2026 |
| D N Hunt Ltd | Real estate | 2020 |
| D.B.M Brickwork Limited | Construction | 2019 |
| Damerham Trout Fisheries LLP | | 2015 |
| DAN Smith Hairdressing Limited | Other services | 2014 |
| DAN Wellington Ltd | Manufacturing | 2025 |
| Daniscan Future Limited | Financial services | 2021 |
| Daniscan Group Limited | Financial services | 2022 |
| Daniscan Services Limited | Professional & scientific | 2022 |
| Darryl Howells Planning Consultancy Limited | Professional & scientific | 2021 |
| Davies & SON Property Solutions Ltd | Real estate | 2017 |
| Dawnsector Limited | Households | 1990 |
| DE Noia Software Ltd | Information & communication | 2026 |
| Deadduckbrewery Limited | Manufacturing | 2023 |
| Dealhive CRM Limited | Information & communication | 2026 |
| Dean and Tranter Limited | Manufacturing | 1920 |
| Delichon Limited | Manufacturing | 1996 |
| Deos Worldwide Ltd | Wholesale & retail | 2025 |
| Disrepublic Limited | Arts & recreation | 2008 |
| Divorce Solicitors Ltd | Professional & scientific | 2022 |
| Dixon & Templeton LLP | | 2010 |
| Domestic Bliss Housekeeping Ltd | Administrative & support | 2021 |
| Dominic Cafe Bistro Ltd | Hospitality | 2025 |
| Dominion Techops Ltd | Wholesale & retail | 2026 |
| Doodletech Ltd | Manufacturing | 2016 |
| Dorset Lake Manor Residents Association Limited | Households | 1968 |
| Douglas Boathouse Limited | Real estate | 2021 |
| Douglas HR Consulting Limited | Information & communication | 2020 |
| Dovenby Consulting Limited | Professional & scientific | 2024 |
| DR Philgood Limited | Health & social care | 2019 |
| DR TOM Lister Ltd | Professional & scientific | 2019 |
| DR Trevor Smith Limited | Health & social care | 2011 |
| Dragoon Way Management Company Limited | Households | 1997 |
| Drakedale Limited | Real estate | 2003 |
| DSI Kitchens Ltd | Manufacturing | 2021 |
| Dual Fitness Therapy Limited | Health & social care | 2020 |
| Dual Fitness Training Ltd | Health & social care | 2018 |
| Dutest Limited | Administrative & support | 2015 |
| Dwend Ltd | Professional & scientific | 2022 |
| Dynamite FX Limited | Arts & recreation | 2013 |
| Earlcoate Civil Engineering Ltd | Construction | 2012 |
| Earlcoate Construction and Plant Hire Ltd | Construction | 2001 |
| Earlcoate Group Limited | Construction | 2014 |
| Earlcoate Projects Ltd | Construction | 2012 |
| Earlcoate Properties Ltd | Construction | 2008 |
| Ebike Motor Centre Ltd | Manufacturing | 2018 |
| Ebowellness Ltd | Wholesale & retail | 2026 |
| Eclipse Plumbing & Property Maintenance Limited | Construction | 2018 |
| Eclipse Services (South) Limited | Administrative & support | 2016 |
| Ecom Collective Ltd | Wholesale & retail | 2025 |
| Edutext Limited | Information & communication | 2000 |
| Edwell Sky Limited | Health & social care | 2018 |
| Elisa Court Management Company Limited | Households | 2018 |
| Elite Game Farm Ltd | Agriculture & fishing | 2019 |
| ELM Farm Associates Limited | Construction | 2015 |
| Elsiarc Limited | Professional & scientific | 2021 |
| Emcb Ltd | Manufacturing | 2022 |
| Employment Contract Ltd | Professional & scientific | 2023 |
| Employment Law Solicitors Ltd | Professional & scientific | 2022 |
| Employment Medical Services Limited | Health & social care | 2002 |
| Endless Summer Jewellery Ltd | Manufacturing | 2017 |
| Energise Digital Limited | Information & communication | 2020 |
| Enrights Logistics Ltd | Transport & logistics | 2022 |
| Enzedel Limited | Hospitality | 2026 |
| Epione (Salisbury) LLP | | 2024 |
| ERG Hospitality Limited | Hospitality | 2026 |
| Essential Beauty Oils Ltd | Wholesale & retail | 2018 |
| European Session Rights Limited | Arts & recreation | 2014 |
| Event Energiser Ltd | Administrative & support | 2024 |