| Enviroguard Applied Technologies Ltd | Professional & scientific | 2020 |
| Envirosmart Applied Technologies Ltd | Professional & scientific | 2020 |
| EOS Controls Limited | Other services | 2010 |
| Everything Sorted Group Limited | Administrative & support | 2016 |
| Everywhere WE Meet Ltd | Arts & recreation | 2025 |
| Evidence Based Strategies Limited | Professional & scientific | 2019 |
| Exact Nationwide Scaffolding Ltd | Construction | 2024 |
| Explore Rights Management Ltd | Information & communication | 2003 |
| F & F Projects Limited | Professional & scientific | 2006 |
| Fane 1959 Ltd | Information & communication | 2026 |
| Farsight HR Consultancy Ltd | Professional & scientific | 2009 |
| Faye Rodney Consultancy Ltd | Professional & scientific | 2023 |
| Fayth Health Ltd | Financial services | 2024 |
| Fayth Limited | Professional & scientific | 2016 |
| Fernley Electrical Limited | Construction | 2009 |
| Fiona Webb Education Improvement Limited | Education | 2022 |
| Fiore Fashion Consultancy Limited | Wholesale & retail | 2026 |
| Fisher Chater Millward Management Company Limited | Households | 2020 |
| Fit 30 Limited | Arts & recreation | 2017 |
| FIX My Pitch Ltd | Information & communication | 2025 |
| Flight Informatics Ltd. | Professional & scientific | 2011 |
| Floorspace Developments Limited | Construction | 1999 |
| Flora Jewellers Ltd | Wholesale & retail | 2017 |
| Florence & Florence Limited | Professional & scientific | 2016 |
| Forme London Ltd. | Wholesale & retail | 2016 |
| Forward International Freight and Transport Group Limited | Transport & logistics | 1971 |
| Frontek Limited | Information & communication | 1997 |
| Full Circle Intl Ltd | Professional & scientific | 2019 |
| Gabriella’S Olney Limited | Hospitality | 2022 |
| Gadus Consultancy Limited | Professional & scientific | 2025 |
| Gamma 100 Limited | Information & communication | 2004 |
| Geniusin Limited | Administrative & support | 2011 |
| Getlindley Ltd | Administrative & support | 2023 |
| Ghost and Hound Limited | Wholesale & retail | 2026 |
| Glen Newberry Ltd | Construction | 2017 |
| Global Career Coach Ltd | Administrative & support | 2026 |
| Global Procurers Ltd | Administrative & support | 2000 |
| Good BIT of KIT Limited | Information & communication | 2025 |
| Grace and Favour Interiors Limited | Construction | 2017 |
| Grace the Bookbus Ltd | Wholesale & retail | 2019 |
| Gray Cyber Ltd | Information & communication | 2025 |
| Greaves HR Limited | Information & communication | 2017 |
| Green EYE Consultancy Ltd | Wholesale & retail | 2019 |
| Griipp Ltd | Wholesale & retail | 2025 |
| Gunnleese Developments Ltd | Construction | 2025 |
| Hairy KOW Design Limited | Arts & recreation | 2017 |
| Handford Research Limited | Professional & scientific | 1989 |
| Handynat LLP | | 2023 |
| Happya Ltd | Health & social care | 2021 |
| HAR JI Transport Limited | Transport & logistics | 2018 |
| Harbour and Clark Ltd | Professional & scientific | 2025 |
| Haveron Fine Art Limited | Wholesale & retail | 2026 |
| Hayden Services Ltd | Construction | 2025 |
| Heating and GAS Ltd | Professional & scientific | 2016 |
| Hedge & Horizon Ltd | Information & communication | 2025 |
| Helix Coffee Advisors Limited | Professional & scientific | 2022 |
| Henry Catchpole Limited | Arts & recreation | 2023 |
| Heritage Court Clifton Management Limited | Households | 2005 |
| Hexlo Ltd | Information & communication | 2018 |
| Hg/Fit Ltd | Arts & recreation | 2015 |
| Hillyard Consulting Ltd | Wholesale & retail | 2012 |
| Hollyhock Space Limited | Professional & scientific | 2013 |
| Homefield (Little Houghton) Management Company Limited | Households | 2024 |
| Hougen Limited | Manufacturing | 2019 |
| Housden Engineering Services Limited | Professional & scientific | 2018 |
| House of Elegance Interior Services Ltd | Professional & scientific | 2024 |
| Housesmart Limited | Construction | 2014 |
| Humphrey Bodywork & Vehicle Spraying Ltd | Wholesale & retail | 2025 |
| HWM Designs Ltd | Arts & recreation | 2010 |
| Ignis Renewables Ltd | Construction | 2025 |
| IL Tong UK Ltd | Wholesale & retail | 2009 |
| Image Matters Consulting Limited | Wholesale & retail | 2023 |
| IN Small Steps Ltd | Wholesale & retail | 2023 |
| Inexterior Property Services Ltd | Households | 2020 |
| Insideout - People Development Limited | Professional & scientific | 2014 |
| Instagreen Ltd | Administrative & support | 2024 |
| Integramensys Consulting Ltd | Administrative & support | 2017 |
| Intelligence-Sec Limited | Professional & scientific | 2012 |
| Invisible Media Ltd | Information & communication | 2011 |
| Iron Pillar Limited | Health & social care | 2019 |
| Issaunders Limited | Professional & scientific | 2023 |
| J & M Travel Limited | Administrative & support | 2021 |
| J a K Builders Ltd | Construction | 2006 |
| J K Taylor Ltd | Wholesale & retail | 2018 |
| J Kimberley Ltd | Professional & scientific | 2019 |
| J S Designs & Interiors Ltd | Wholesale & retail | 2010 |
| JADEGARDEN26 Limited | Hospitality | 2026 |
| JADEGARDEN8 Limited | Hospitality | 2023 |
| James W Berry Ltd | Real estate | 2020 |
| Jane Smith Financial Planning Limited | Financial services | 2002 |
| Janine Cadman Consultants Limited | Information & communication | 2016 |
| Janyck House Properties Limited | Households | 2015 |
| Jarden Murphy Ltd | Professional & scientific | 2025 |
| Jasper Wood Solutions Limited | Professional & scientific | 2025 |
| Jaye Engineering Limited | Professional & scientific | 1977 |
| JB Plus Limited | Information & communication | 2009 |
| JDS Saunders Co. Ltd | Professional & scientific | 2018 |
| Jennifer Carr Ltd | Administrative & support | 2020 |
| JHP Real Estate Limited | Professional & scientific | 2023 |
| JJ Cleaning and Housekeeping Consultancy Ltd | Professional & scientific | 2020 |