| Frontbenchers Limited | Professional & scientific | 2020 |
| Fruit Tree Design Ltd | Professional & scientific | 2014 |
| FS JV License Limited | Administrative & support | 2016 |
| FS MID License Limited | Administrative & support | 2016 |
| FS Senior Co Limited | Administrative & support | 2015 |
| FST Marketing Communications Ltd | Professional & scientific | 1992 |
| FTL Developments Ltd | Construction | 2025 |
| Fuchsia Systems Limited | Information & communication | 2025 |
| Full Potential Ltd | Professional & scientific | 1998 |
| Fullard Properties Ltd | Real estate | 2020 |
| G & B Foam (High Wycombe) Limited | Wholesale & retail | 1976 |
| G E Construct Limited | Administrative & support | 2010 |
| G E Property Associates Limited | Professional & scientific | 2016 |
| G&G Research Ltd | Information & communication | 2015 |
| G&L Scientific Holdings Limited | Administrative & support | 2020 |
| G&L Scientific Ltd | Administrative & support | 2016 |
| G2 Interiors & Design Limited | Professional & scientific | 2014 |
| Gaea Collaboration Ltd | Professional & scientific | 2017 |
| Gamesense Ltd | Professional & scientific | 2014 |
| Gaming Ltd | Professional & scientific | 2007 |
| Gandon Vale (39-46) RTM Company Limited | Households | 2010 |
| Garc Reading Limited | Arts & recreation | 2010 |
| Gareth Edwards Electrics Limited | Construction | 2010 |
| Garrett Mckee Limited | Construction | 1986 |
| GAS Matters Limited | Extraterritorial | 2003 |
| GAS Strategies Consulting Limited | Extraterritorial | 2003 |
| GAS Strategies Group Limited | Professional & scientific | 1988 |
| GAS Strategies Holdings Limited | Other services | 2008 |
| Gathered Home Ltd. | Manufacturing | 2012 |
| Gazcon Ltd | Professional & scientific | 2014 |
| General Evaluation Property Limited | Professional & scientific | 2018 |
| General Property Evaluation Ltd | Professional & scientific | 2018 |
| Genesis Gym Ltd | Arts & recreation | 2011 |
| Genesis Services Systems & Supplies Ltd | Wholesale & retail | 2017 |
| Genesys Ltd | Information & communication | 2023 |
| GEO Consultancy Limited | Professional & scientific | 2015 |
| Geordie Campbell Limited | Manufacturing | 2023 |
| George Remy Ltd | Construction | 2017 |
| German Office Group Asset Management Limited | Real estate | 2018 |
| German Office Group Limited | Real estate | 2018 |
| GET Berkshire Active Ltd | Arts & recreation | 2011 |
| GET Media Ltd | Professional & scientific | 2008 |
| GET Moore Limited | Construction | 2012 |
| GFV01 Ltd | Real estate | 2019 |
| GFV02 Ltd | Real estate | 2023 |
| Gibson Court (Langley) Limited | Households | 1966 |
| Gina B Interiors Limited | Administrative & support | 1999 |
| Giro Storico Ltd | Administrative & support | 2023 |
| Giro Trading Ltd. | Extraterritorial | 1994 |
| GJ Hudson Ltd | Manufacturing | 2023 |
| GJ3 Limited | Real estate | 2024 |
| GJC (Belgrade) Ltd | Construction | 2023 |
| GK Singh Limited | Wholesale & retail | 2024 |
| GK1 Properties Ltd | Real estate | 2012 |
| Glausser Electrical Limited | Construction | 2025 |
| Glenore Management Company Limited | Households | 2001 |
| Global Channels Ltd | Information & communication | 2014 |
| Global Nature School Network Limited | Education | 2025 |
| Global Sport Technology Limited | Information & communication | 2019 |
| Global Village Action Limited | Other services | 2009 |
| Globelink Packaging Limited | Manufacturing | 1991 |
| Glory Mill RTM Company Limited | Households | 2007 |
| GLS Motors World Ltd | Wholesale & retail | 2025 |
| Glynswood House Management (Chinnor) Limited | Households | 1982 |
| Gmdc Limited | Extraterritorial | 2018 |
| GMH Property Investments Ltd | Real estate | 2020 |
| GNF01 Ltd | Wholesale & retail | 2020 |
| Golden Peacock Interior Design Ltd | Professional & scientific | 2024 |
| Golden Ticket Comps Ltd | Arts & recreation | 2025 |
| Goldfinch Artists Ltd | Arts & recreation | 2020 |
| Golf City MK Limited | Hospitality | 2015 |
| Gone Wild VEG CIC | Agriculture & fishing | 2025 |
| Goodright Property Ltd | Construction | 2020 |
| Gordon Mcalpine Limited | Professional & scientific | 2016 |
| Gordon Road Car Park Management Company Limited | Households | 2024 |
| Gordons Solicitors Limited | Professional & scientific | 2013 |
| Gospaces Limited | Hospitality | 2014 |
| Gossmore Ltd | Administrative & support | 2012 |
| Gozico Gifts Ltd | Wholesale & retail | 2023 |
| Gozico Ltd | Financial services | 2020 |
| GRA Investments Limited | Real estate | 2011 |
| Grace Interactive Entertainment Limited | Information & communication | 2021 |
| Grade a Media Ltd | Professional & scientific | 2026 |
| Grandma Global Ltd | Professional & scientific | 2025 |
| Grange House Residents Management Company Limited | Households | 2000 |
| Grangewood Place (Maidenhead) Management Company Limited | Households | 2014 |
| Grannom Consulting Ltd | Other services | 2024 |
| Grant Legal Services Limited | Professional & scientific | 2017 |
| Grave Care Ltd | Administrative & support | 2025 |
| Gravic Event Services Limited | Hospitality | 2013 |
| Gravic Events Limited | Hospitality | 2023 |
| Gravity DDA Ltd | Information & communication | 2007 |
| Grayson Pace Limited | Administrative & support | 2018 |
| Great Britain Hockey Limited | Arts & recreation | 2003 |
| Great Marlow School | Education | 2011 |
| Great Stockwell Management Company Limited | Real estate | 2025 |
| Green Frog Recycling Ltd | Water & waste | 2016 |
| Green Oxygen Hyperbarics Limited | Health & social care | 2025 |
| Greenbat Engineering Products Limited | Manufacturing | 1990 |
| Greenfield Engineering Group Limited | Construction | 1994 |