| Five One Seven Ltd | Information & communication | 2025 |
| Flashrocket Limited | Information & communication | 2008 |
| Flex Connection Ltd | Manufacturing | 2019 |
| Floorless Garage Tiles Ltd | Construction | 2023 |
| Flora Pilates Ltd | Other services | 2024 |
| Florin AGA Limited | Transport & logistics | 2020 |
| Flow Thermal Stress Engineering Answers Limited | Professional & scientific | 2016 |
| Fluo Prod Limited | Administrative & support | 2007 |
| Flutters Bingo Limited | Arts & recreation | 2017 |
| Fonetouch Limited | Wholesale & retail | 2025 |
| Footo Limited | Information & communication | 2018 |
| Forcefield Electrics Limited | Construction | 2025 |
| Ford Tech Biggleswade Ltd | Wholesale & retail | 2022 |
| Fordell Developments Limited | Construction | 2022 |
| Fordell Holdings Limited | Financial services | 2022 |
| Fordell Property Management Limited | Real estate | 2022 |
| Formasons Ltd | Construction | 2010 |
| Fort PAY Ltd | Information & communication | 2025 |
| Fortis CM Ltd | Professional & scientific | 2022 |
| Found Furniture Limited | Extraterritorial | 2022 |
| Fourth Horseman Ltd | Information & communication | 2010 |
| Frame Atelier Ltd | Information & communication | 2025 |
| Freddie ROO Developments Ltd | Professional & scientific | 2022 |
| Freelance Marketing Solutions Limited | Professional & scientific | 2005 |
| Freeman Electrical Services Ltd | Construction | 2026 |
| Frontline Packaging Ltd | Manufacturing | 2011 |
| Frontline Safety Solutions Ltd | Other services | 2016 |
| Fsolutions Limited | Professional & scientific | 2022 |
| Funny Looking KID Ltd | Arts & recreation | 2018 |
| Furchester Dog Services Limited | Other services | 2021 |
| Fusion Trading (Biggleswade) Ltd | Wholesale & retail | 2010 |
| Futureproof Financial Solutions Ltd | Financial services | 2021 |
| G & M Potatoes Limited | Professional & scientific | 2002 |
| G D a Electrical Limited | Construction | 2009 |
| G Leonard Consulting Limited | Professional & scientific | 2024 |
| G O Holdings (Chelmsford) Ltd | Construction | 2021 |
| G&K Collectibles Ltd | Wholesale & retail | 2026 |
| G. & M. Growers Limited | Wholesale & retail | 1982 |
| G.A.H Logistics Ltd | Transport & logistics | 2025 |
| G.H. Online Accounting Limited | Professional & scientific | 1999 |
| GA Tapas & Bar Ltd | Hospitality | 2024 |
| Gankoo Ltd | Professional & scientific | 2017 |
| Garners Properties Ltd | Real estate | 2024 |
| Garrard Trustees Limited | Professional & scientific | 2014 |
| Garrett Consulting Ltd | Information & communication | 2025 |
| Gary James Consultancy Ltd | Professional & scientific | 2026 |
| GASG18 Ltd | Hospitality | 2019 |
| Gathering Events Ltd | Administrative & support | 2025 |
| Gavin Mills Estate Agents Limited | Real estate | 2020 |
| GB Pool Plant Services Limited | Administrative & support | 2026 |
| GCC Developments (UK) Limited | Construction | 2011 |
| GCS Prop Limited | Real estate | 2025 |
| Gemma Ball Fitness Ltd | Arts & recreation | 2024 |
| George Ernest Ltd | Construction | 2011 |
| George HAY Partnership LLP | | 2012 |
| George Webb Fitness Ltd | Education | 2020 |
| Gert Lush Production Ltd | Administrative & support | 2016 |
| GH Audit Limited | Professional & scientific | 2025 |
| GHM Associates Limited | Hospitality | 2013 |
| Giddy Goat Media Limited | Information & communication | 2014 |
| Giftsorted Ltd | Wholesale & retail | 2023 |
| Gilbert's Commercial Services Ltd | Professional & scientific | 2024 |
| Giraldus Ltd | Professional & scientific | 2017 |
| GJH Services (UK) Ltd. | Professional & scientific | 2014 |
| Gkmmac. Limited | Manufacturing | 2015 |
| GL Management Limited | Households | 2024 |
| Glade Pest Control Services Limited | Professional & scientific | 2004 |
| Glassdome Holdings Ltd | Real estate | 2022 |
| Globetrotter Life Limited | Professional & scientific | 2009 |
| Glorious Management Limited | Arts & recreation | 2009 |
| Glow Home Properties Ltd | Construction | 2019 |
| Go Fire Protection Ltd | Construction | 2020 |
| Go Glean Limited | Manufacturing | 2021 |
| Good Greek BOY Ltd | Arts & recreation | 2023 |
| Goshdamn Ltd | Information & communication | 2025 |
| GPS Developments (UK) Limited | Construction | 2008 |
| Gqai Limited | Wholesale & retail | 2022 |
| Grain Guard Limited | Wholesale & retail | 2022 |
| Grainger Healthcare Solutions Limited | Health & social care | 2005 |
| Grant James Developments Limited | Construction | 2022 |
| Gravity Productions Ltd | Professional & scientific | 2020 |
| Greaves Developments Limited | Hospitality | 2007 |
| Green Goddess Health & Wellness Ltd | Manufacturing | 2016 |
| Green Hydra Limited | Other services | 2018 |
| Green Waze Limited | Extraterritorial | 2021 |
| Grenair Group Limited | | 1960 |
| Gresley Society Trading Ltd | Other services | 2012 |
| Greystar Property Holdings Ltd | Real estate | 2022 |
| Greytail Ltd | Arts & recreation | 2022 |
| Griffin Construction Ltd | Professional & scientific | 2025 |
| Grosa Ltd | Information & communication | 2023 |
| GTG Services Ltd | Transport & logistics | 2012 |
| Gygenci Limited | Hospitality | 2021 |
| H.D. Windows Limited | Construction | 1993 |
| Haetzman Limited | Administrative & support | 2013 |
| Hair at LE Roux Limited | Other services | 2024 |
| Hajw Consulting Ltd | Professional & scientific | 2024 |
| Hancock's Estates Ltd | Real estate | 2020 |
| Handsome Design Ltd | Professional & scientific | 2011 |
| Hansen & White Ltd | Professional & scientific | 2018 |