| Forman Transport Ltd | Transport & logistics | 2025 |
| Forstech Engineering Services Ltd | Professional & scientific | 2018 |
| Fortress Distribution Holdings Limited | Financial services | 2022 |
| Fortress Distribution Limited | Wholesale & retail | 2012 |
| Foundation Communications Limited | Professional & scientific | 2018 |
| Foundry Risk & Management Consultancy Limited | Administrative & support | 2015 |
| Foxden IT Ltd | Information & communication | 2020 |
| Franchise Options Limited | Professional & scientific | 2001 |
| Fraser Osborne Limited | Administrative & support | 2018 |
| Fraud Investigation Training Limited | Administrative & support | 2025 |
| Freedom With Tania Limited | Administrative & support | 2021 |
| French Property Group Limited | Extraterritorial | 2015 |
| Frossell Recruitment Ltd | Administrative & support | 2018 |
| FTG Navigator Ltd | Hospitality | 2025 |
| Fuery Limited | Financial services | 2024 |
| Full Arch Solutions Limited | Health & social care | 2026 |
| Full Circle People Consulting Ltd | Administrative & support | 2023 |
| Fuse Coaching Collective Ltd | Professional & scientific | 2023 |
| Fusing Creativity Limited | Professional & scientific | 2012 |
| Fusion Marketing and Sales Limited | Professional & scientific | 2012 |
| G Carroll Ltd | Wholesale & retail | 2016 |
| G L Pilates Ltd | Other services | 2025 |
| G&G Global Consulting Ltd | Professional & scientific | 2022 |
| G.K. Switchgear Limited | Manufacturing | 1985 |
| GAB Care Service Ltd | Health & social care | 2025 |
| Galaxy Cinema Group Limited | Information & communication | 2022 |
| Galaxy Cinema Services Limited | Information & communication | 2022 |
| Galaxy Records & Video Limited | Wholesale & retail | 2022 |
| Galbros Ltd | Information & communication | 2022 |
| GAP Kare Limited | Administrative & support | 2021 |
| Gardenia Medical Ltd | Health & social care | 2024 |
| Gardner and White Limited | Wholesale & retail | 1999 |
| Garner Training Solutions Limited | Professional & scientific | 2002 |
| Gary Davidson Property Specialist Ltd | Real estate | 2026 |
| Gasline Ltd | Energy | 2014 |
| Gasmarks Plumbing & Heating (MK) Limited | Construction | 2013 |
| GB Architecture Consulting Ltd | Professional & scientific | 2024 |
| GB Maze Services Limited | Administrative & support | 2014 |
| GC Security Data and Technical Answers Ltd | Administrative & support | 2022 |
| GC United Kingdom Limited | Wholesale & retail | 1995 |
| Gemini Supported Living Limited | Health & social care | 2019 |
| Geodesa Limited | Information & communication | 2002 |
| George GEE Limited | Professional & scientific | 2019 |
| Gerry Campbell Consultancy Ltd | Administrative & support | 2017 |
| GL Consulting Solutions Ltd | Professional & scientific | 2025 |
| GL Investment Management Services Ltd | Financial services | 2021 |
| Glass Aftercare Limited | Construction | 2003 |
| Glassford Holdco Limited | Financial services | 2024 |
| Glasslite Consulting Ltd | Information & communication | 2020 |
| Glebemk Limited | Construction | 2023 |
| Global Admissions Services Limited | Education | 2010 |
| GMK Supply Limited | Professional & scientific | 2005 |
| Gnss Group Ltd | Administrative & support | 2022 |
| Golden Finish Awards Ltd | Hospitality | 2025 |
| Golden Marine Logistics Ltd | Wholesale & retail | 2022 |
| Golden Square Solutions Limited | Real estate | 2018 |
| Goldington Engineering Limited | Professional & scientific | 2026 |
| Goshawk Holdings Ltd | Financial services | 2022 |
| Gpal Group Limited | Financial services | 2023 |
| Gpal Ltd | Construction | 2019 |
| Grace Aesthetics Ltd | Other services | 2026 |
| Grand Tour Transport Limited | Transport & logistics | 2022 |
| Grange Farm (Ryton) Limited | Administrative & support | 2021 |
| Graphic West Limited | Professional & scientific | 2025 |
| Graphic West Machinery Limited | Professional & scientific | 2025 |
| Greaves Motorsport Ltd | Wholesale & retail | 2017 |
| Greenroute Foods Limited | Wholesale & retail | 2025 |
| Greenwich Management Consultants Limited | Professional & scientific | 2017 |
| Grey Dynamics Ltd | Professional & scientific | 2017 |
| Gripspeed Ltd | Wholesale & retail | 2014 |
| Griseo Holdings Limited | Financial services | 2024 |
| Groomies Ltd | Other services | 2025 |
| Grounded Self Ltd | Professional & scientific | 2026 |
| Grove & Sons Limited | Administrative & support | 2021 |
| Grove Dene Ltd | Professional & scientific | 2026 |
| Gtipay Ltd | Information & communication | 2014 |
| GWA Accountancy Limited | Professional & scientific | 2017 |
| Gwpm Limited | Professional & scientific | 2025 |
| Gym Python Ltd | Wholesale & retail | 2023 |
| H H Childminding Ltd | Health & social care | 2026 |
| H J Morgan & Co Ltd | Professional & scientific | 2026 |
| Habita Properties Ltd | Real estate | 2023 |
| Hades Investigations Limited | Administrative & support | 2021 |
| Hall Partnerships Consultancy Limited | Professional & scientific | 2023 |
| Hallo Courtyard Ltd | Real estate | 2021 |
| Halton Residents Company Limited | Households | 2002 |
| Hammer Time Property Refurbishments and Maintenance Limited | Construction | 2017 |
| Handsense UK Ltd | Education | 2025 |
| Handsfree Handling Limited | Agriculture & fishing | 2020 |
| Happy Hols Limited | Arts & recreation | 2008 |
| Harbourrents Ltd | Wholesale & retail | 2024 |
| Hardacre Developments Limited | Real estate | 2015 |
| Hardware for YOU Limited | Wholesale & retail | 2015 |
| Hare's Breath Limited | Arts & recreation | 2010 |
| Harmony Digestive and Liver Wellness LLP | | 2025 |
| Harmony Specialists Group Ltd | Health & social care | 2025 |
| Harnfield Limited | Construction | 2024 |
| Hartswood Inns Limited | Hospitality | 2022 |
| Haulsync Ltd | Transport & logistics | 2026 |
| HAV Vaccines Limited | Manufacturing | 2009 |