| Formosa Landscapes Ltd | Professional & scientific | 2020 |
| Formosa Living Ltd | Construction | 2025 |
| Formulate Tools Ltd | Information & communication | 2026 |
| FOX Fire Solutions Ltd | Public administration | 2025 |
| Frederick House Property Management Limited | Households | 1997 |
| Freight Movement Sameday Ltd | Transport & logistics | 2019 |
| Fresh & Wild Catering Ltd | Hospitality | 2016 |
| Frfg Ltd | Construction | 2025 |
| FT Property and Services Limited | Real estate | 2007 |
| FT Tech Europe Limited | Manufacturing | 2007 |
| FT Tech North America Limited | Extraterritorial | 2007 |
| FT Technologies (Intl) Limited | Wholesale & retail | 2007 |
| FT Technologies (UK) Ltd | Manufacturing | 2007 |
| Fulcher Management Company Limited | Households | 1987 |
| Fuse Business Consulting Ltd | Professional & scientific | 2020 |
| Fusion Business Solutions (UK) Limited | Information & communication | 1998 |
| Fusion Force Ltd | Professional & scientific | 2004 |
| Fusion Global Limited | Professional & scientific | 2002 |
| Future Computing Limited | Extraterritorial | 1995 |
| Fyhd Limited | Information & communication | 2026 |
| G and T Services Ltd | Other services | 2022 |
| G H Richards Ltd | Wholesale & retail | 2018 |
| GA Consulting Limited | Professional & scientific | 2024 |
| Gaavchi Limited | Professional & scientific | 2023 |
| GAF Industries Ltd | Construction | 2024 |
| Gafar Ltd | Professional & scientific | 2024 |
| Ganjam Properties Limited | Real estate | 2022 |
| GAO Box Ltd | Hospitality | 2024 |
| Gapcare Services Limited | Health & social care | 2011 |
| Garden Cottage Arts and Crafts Limited | Arts & recreation | 2025 |
| Gardiner Hunter & Catt Limited | Extraterritorial | 2014 |
| Garmian Car Wash Ltd | Wholesale & retail | 2025 |
| Garrard Property Services Limited | Real estate | 2017 |
| GAS FIX 2.0 Ltd | Construction | 2024 |
| Gastec Commercial & Domestic Services Limited | Construction | 2025 |
| Gatto Verde Ltd | Construction | 2023 |
| Gazza Watson Limited | Professional & scientific | 2005 |
| GDB Trans Ltd | Transport & logistics | 2019 |
| GDG Property Investments Ltd | Real estate | 2022 |
| Geeiq Consultancy Limited | Professional & scientific | 2020 |
| GEM Security Services Limited | Other services | 1990 |
| Gemsforlux Ltd | Wholesale & retail | 2025 |
| Gemsys Connections Ltd | Information & communication | 2015 |
| Genallur Properties Ltd | Real estate | 2025 |
| Geotechniquesresearch Limited | Administrative & support | 2008 |
| Ginair Cargo Limited | Transport & logistics | 2013 |
| Girls Gotta Script Ltd | Arts & recreation | 2017 |
| Gita Studio Ltd | Information & communication | 2025 |
| Giving Impetus to Voluntary Effort | Education | 2003 |
| Global Oxcam Ltd | Information & communication | 2006 |
| Global Procurement and Services Limited | Wholesale & retail | 2013 |
| Global Treatment & Consultancy Limited | Health & social care | 2025 |
| Glow Eyebrow Bar Limited | Other services | 2017 |
| Gmcdesign Ltd | Professional & scientific | 2018 |
| Goholidaydirect Limited | Administrative & support | 2023 |
| Goja Home Ltd | Real estate | 2025 |
| Golden Grill Sunbury Limited | Hospitality | 2021 |
| Golden Hands Deco Ltd | Construction | 2025 |
| Golden Secure Logistics Ltd | Transport & logistics | 2019 |
| Goldenhand Software Limited | Information & communication | 2019 |
| Govardhan Dining Limited | Hospitality | 2025 |
| GP Courier Ltd | Transport & logistics | 2025 |
| Great Oaks Charitable Trust | Education | 2017 |
| Green Rail Ltd | Construction | 2024 |
| Green Structures Ltd | Construction | 2022 |
| Greenbec Ltd | Information & communication | 2022 |
| Grid Land Limited | Administrative & support | 2018 |
| Groveley Garden Kids Limited | Health & social care | 2026 |
| Growth Bay Consulting Ltd. | Administrative & support | 2020 |
| Gsxr Accounts Ltd | Professional & scientific | 2022 |
| GVB Construction Ltd | Construction | 2014 |
| Gxpro Global Ltd | Professional & scientific | 2026 |
| H & Friends GTL (UK) Ltd | Transport & logistics | 2003 |
| HAA Rise Coaching Limited | Health & social care | 2025 |
| Hadz-E-Commerce Limited | Wholesale & retail | 2024 |
| Halbert Technologies Limited | Information & communication | 2008 |
| Half German Productions Ltd | Information & communication | 2013 |
| Haller Consultants Limited | Information & communication | 1993 |
| Halliford Crash Consortium Limited | Wholesale & retail | 2002 |
| Hampton AIS Ltd | Real estate | 2024 |
| Hampton Healthcare Consulting Ltd | Professional & scientific | 2017 |
| Hanshi Karate Academy Limited | Education | 2021 |
| Hanworth Park Court Residents Association Limited | Real estate | 1987 |
| Happy Feet Preschool Ltd | Health & social care | 2018 |
| Happy Sounds Productions Ltd | Information & communication | 2021 |
| Hare and Hounds Sunbury Ltd | Wholesale & retail | 2021 |
| Hare Krishna IT Solutions Ltd | Information & communication | 2022 |
| Harri's Beauty Clinic Limited | Other services | 2019 |
| Hart House (Sunbury on Thames) Management Company Limited | Administrative & support | 2009 |
| Hartmaths Ltd | Real estate | 2024 |
| Harvest Global Ventures Ltd | Real estate | 2023 |
| Harveys Properties Ltd | Real estate | 2017 |
| Harvoll Enterprises Ltd | Information & communication | 2012 |
| Hatchlings Stay and Play Ltd | Education | 2026 |
| Hateem Collection Ltd | Wholesale & retail | 2026 |
| Haven Home Estates Ltd | Real estate | 2025 |
| Hawkewood Consulting Limited | Professional & scientific | 2025 |
| Hazelbank Flats Management Company Limited | Households | 1995 |
| Hazeldene Court (Horsell) Management Company Limited | Households | 1987 |
| Hazelwood Community Company | Arts & recreation | 2016 |