| DAV International Ltd | Extraterritorial | 2007 |
| David Hackett Consultancy Limited | Administrative & support | 2012 |
| David Orchard Outdoor Living Limited | Wholesale & retail | 2022 |
| David Williams Financial Solutions Limited | Financial services | 2020 |
| De-Compression Limited | Information & communication | 2007 |
| Dean Stokes (Builders) Limited | Construction | 2004 |
| DEN MAR Ltd | Hospitality | 2025 |
| Denton Village Store Ltd | Wholesale & retail | 2025 |
| Dgsh Developments Ltd | Construction | 2025 |
| DID AI Ltd | Manufacturing | 2026 |
| Dining.Tube Ltd | Hospitality | 2012 |
| Diss & District Community Transport Association Limited | Transport & logistics | 2002 |
| Divisor International Ltd | Extraterritorial | 2016 |
| Dome Events Limited | Manufacturing | 2020 |
| Domity UK Limited | Professional & scientific | 2016 |
| DON Brown Ltd | Arts & recreation | 2013 |
| Doughty Construction Ltd | Construction | 2016 |
| Dwornik Engineering Limited | Manufacturing | 1989 |
| E17CRAFTWORKS Limited | Manufacturing | 2018 |
| EA Networks Ltd | Information & communication | 2023 |
| Eafk Limited | Professional & scientific | 2023 |
| Easias Cleaning Limited | Administrative & support | 2024 |
| East Anglia Sign Installation and Services Limited | Administrative & support | 2019 |
| East Coast Driver Training Ltd | Education | 2013 |
| Eastern Demolition and Asbestos Limited | Construction | 2022 |
| Eastern Demolition and Recycling Limited | Construction | 2022 |
| Eastern Demolition Limited | Construction | 2020 |
| Eddie's Minimart Ltd | Wholesale & retail | 2015 |
| Edge Lifestyle Ltd | Wholesale & retail | 2019 |
| Edgefield Park Residents Association Limited | Households | 1978 |
| Edward Grant Projects Limited | Construction | 2016 |
| Elite Aviation Maintenance Limited | Professional & scientific | 2022 |
| Elite TM Services Ltd | Financial services | 2025 |
| Elite TM Solutions Ltd | Construction | 2021 |
| Ellm Limited | Administrative & support | 2015 |
| Elms Angling Club Limited | Agriculture & fishing | 1945 |
| Elms Timber Ltd | Construction | 2024 |
| Enorme Limited | Hospitality | 2023 |
| Ensign Europa Limited | Administrative & support | 2025 |
| EVE Carpentry and Renovations Ltd | Construction | 2024 |
| Exhaust Coating UK Limited | Extraterritorial | 2011 |
| Extreme Finish Ltd | Construction | 2014 |
| Feathers and Flight Ltd | Agriculture & fishing | 2026 |
| Feedmark Limited | Manufacturing | 1979 |
| Feel Good Physio Ltd | Health & social care | 2026 |
| Felshams Ltd | Professional & scientific | 2019 |
| Field and Fest Limited | Hospitality | 2025 |
| Fieldcraft Training Ltd | Extraterritorial | 2002 |
| Fifa Homes Ltd | Construction | 2023 |
| Finnels Properties Ltd | Real estate | 2024 |
| Fireback Limited | Wholesale & retail | 1999 |
| Fizz and Ginger Films Ltd | Information & communication | 2009 |
| Flint Associates Limited | Professional & scientific | 2024 |
| Foot to the Floor Limited | Information & communication | 2022 |
| Forwardyear Property Management Limited | Professional & scientific | 1990 |
| Furlong Construction and Plumbing Services Ltd | Construction | 2023 |
| G Dunn Electrical Limited | Construction | 2019 |
| G.H.I Engineering Ltd | Professional & scientific | 2013 |
| G.J. & S.M. Harvey Limited | Construction | 2002 |
| Genco 1974 Ltd | Manufacturing | 2023 |
| Gentys Limited | Other services | 2012 |
| GET ME to the Greek Ltd | Hospitality | 2025 |
| Gilly Recovery Ltd | Transport & logistics | 2024 |
| Gilman Court Residents Association Limited | Households | 1982 |
| Gimburts Limited | Professional & scientific | 2021 |
| Glayone Limited | Wholesale & retail | 2009 |
| GLO Grow Ltd | Wholesale & retail | 2011 |
| GLO Quimicos LDA Ltd | Wholesale & retail | 2024 |
| Glug Life Ltd | Wholesale & retail | 2025 |
| Goodswens Garage Limited | Wholesale & retail | 2012 |
| GRB Energy Ltd | Construction | 2025 |
| Grease Monkeys Garage Ltd | Extraterritorial | 2024 |
| Griffin Independence Solutions Ltd | Health & social care | 2024 |
| GRN Engineering Ltd | Wholesale & retail | 2018 |
| Growing Art Partnerships Limited | Arts & recreation | 2015 |
| Gunpowder Consulting Ltd | Professional & scientific | 2012 |
| GWN Trading Limited | Wholesale & retail | 1999 |
| H C Brown Limited | Agriculture & fishing | 2016 |
| H Reeves Electrical Ltd | Construction | 2024 |
| Hamiltons Removals Limited | Transport & logistics | 1993 |
| Hannah Spence Aesthetics Ltd | Other services | 2021 |
| Harleston Convenience Store Ltd | Wholesale & retail | 2024 |
| Harleston Information Plus | Information & communication | 2003 |
| Harleston Joinery Limited | Manufacturing | 2006 |
| Harleston Local Store Ltd | Wholesale & retail | 2013 |
| Harleston Software Ltd | Information & communication | 2024 |
| Harleston Tyre Services Limited | Wholesale & retail | 2011 |
| Havant Windows Limited | Administrative & support | 2013 |
| Hawkeye Management Systems Limited | Professional & scientific | 2022 |
| Haxby Ceramics Limited | Manufacturing | 1966 |
| Hazel Carter Limited | Financial services | 2021 |
| Healthcraft Limited | Extraterritorial | 2014 |
| Hi-Rel Lids AC Limited | Manufacturing | 2013 |
| Hi-Rel Lids Limited | Manufacturing | 1986 |
| High-Five Developments Limited | Construction | 2014 |
| Highfields Ventures Limited | Manufacturing | 2017 |
| Hiperty Ltd | Real estate | 2019 |
| Hockham & Jones Garden Services Ltd | Administrative & support | 2025 |
| Hole in One Challenge Limited | Arts & recreation | 2025 |
| Howletts Studio Ltd | Other services | 2025 |