| Friday Island Limited | Agriculture & fishing | 1980 |
| Friends of Chesterton School & Nursery Ltd | Education | 2013 |
| From Alignment Ltd | Professional & scientific | 2025 |
| From Ben's Kitchen Ltd | Hospitality | 2021 |
| Fromacorns Property Ltd | Real estate | 2018 |
| Fruits of Your Labour Ltd | Wholesale & retail | 2025 |
| Fryerward Limited | Extraterritorial | 2014 |
| Fsaju Property Group Ltd | Real estate | 2024 |
| Functional Training Centre Cirencester Ltd | Arts & recreation | 2023 |
| Furlong Capital Ltd | Professional & scientific | 2023 |
| Furniture and Interiors Skills Plus Ltd | Administrative & support | 2017 |
| Fusioncxo Ltd | Information & communication | 2025 |
| Future Proof Limited | Administrative & support | 2011 |
| Fynbos Consulting Limited | Professional & scientific | 2014 |
| G King Haulage Limited | Transport & logistics | 2016 |
| G&S Tyres Ltd | Wholesale & retail | 2024 |
| G.D.S Medtech Limited | Wholesale & retail | 2011 |
| Gaapa Limited Liability Partnership | | 2024 |
| Gadget Street Ltd | Wholesale & retail | 2008 |
| Gadwall Properties Limited | Real estate | 2023 |
| Gadwall Property Investments Limited | Real estate | 2023 |
| Galam Ltd | Manufacturing | 2020 |
| Gallop & Grind Ltd | Manufacturing | 2025 |
| Galloway Kemp Ltd | Manufacturing | 2014 |
| Ganbare Ltd | Professional & scientific | 2014 |
| Ganda Foundation Ltd | Health & social care | 2009 |
| Gardens-Agogo.Com Limited | Wholesale & retail | 2022 |
| Gardenzone Limited | Information & communication | 1998 |
| Gary Vincent Ltd | Information & communication | 2019 |
| Gasp Smoke Free Services Limited | Health & social care | 2010 |
| Gator Kleen Ltd | Water & waste | 2025 |
| GB Agri Ltd | Agriculture & fishing | 2026 |
| GB Caravans Ltd | Wholesale & retail | 2019 |
| GBI Mitchell Ltd | Administrative & support | 2021 |
| Gbics.Com Limited | Information & communication | 2013 |
| GC Aviation Maintenance Limited | Transport & logistics | 2014 |
| GE Delivery Ltd | Transport & logistics | 2023 |
| Gecko Cricket Sports Ltd | Wholesale & retail | 2012 |
| Gecko Grips Ltd | Information & communication | 2015 |
| Geekonabike Limited | Information & communication | 2014 |
| Gemini Care Partners Ltd | Health & social care | 2026 |
| Gemma Cubitt Consultancy Ltd | Professional & scientific | 2021 |
| Gemma KAY Limited | Other services | 2015 |
| Gemol Limited | Real estate | 2017 |
| General Dogsbody Ltd | Professional & scientific | 2012 |
| George Brooks Ltd | Professional & scientific | 2011 |
| Georgie James Nutrition Limited | Health & social care | 2026 |
| Georgina Bywater Limited | Extraterritorial | 2023 |
| GET IT Sorted Limited | Professional & scientific | 2002 |
| GET Mind Fit Limited | Health & social care | 2000 |
| GET2G Limited | Professional & scientific | 2016 |
| GGM Computer Services Limited | Information & communication | 2019 |
| Ghost Orchid Ltd | Information & communication | 2020 |
| Ghost Orchid Publications Ltd | Information & communication | 2025 |
| Gibbs Chiropractic Clinic Ltd. | Health & social care | 2010 |
| Gibson Investment Holdings Limited | Financial services | 2025 |
| Gift of KIT Limited | Extraterritorial | 2025 |
| Gifts & Go Ltd | Extraterritorial | 2011 |
| Gilly’S Nest Ltd | Real estate | 2025 |
| Gilos Cafe Limited | Hospitality | 2021 |
| GK Strategic Solutions Limited | Professional & scientific | 2012 |
| GL7 Productions Limited | Professional & scientific | 2010 |
| GL7 Taxis Limited | Transport & logistics | 2024 |
| Gladbray Limited | Hospitality | 2012 |
| Glass Eyes Studio Ltd | Wholesale & retail | 2025 |
| Glenfrome Engineering Limited | Professional & scientific | 2005 |
| Glide Networks Limited | Information & communication | 2016 |
| Global Business Park Management Company Limited | Real estate | 2011 |
| Gloriously Good Ltd | Wholesale & retail | 2018 |
| Glosstock Ltd | Wholesale & retail | 2011 |
| Gloucester Street Design&Build Ltd | Construction | 2024 |
| GM Unlimited Limited | Real estate | 2021 |
| Gnaritas Consulting Limited | Professional & scientific | 2018 |
| Go Robotics AI Ltd | Wholesale & retail | 2025 |
| Goddard Construction Limited | Construction | 2016 |
| Goddess of Fortune Limited | Wholesale & retail | 2024 |
| Goldborough House Kennels & Cattery Ltd | Other services | 2013 |
| Goldcrest Homecare Limited | Health & social care | 2021 |
| Golden Eagle Properties Limited | Professional & scientific | 1998 |
| Golden Valley Automotive Ltd | Transport & logistics | 2020 |
| Golden Valley Marine Ltd | Administrative & support | 2025 |
| Goldenbucket Ltd | Wholesale & retail | 2025 |
| Goldings Property Consultants Ltd. | Professional & scientific | 2006 |
| Goldsworthy`S Hairdressing (Cirencester) Limited | Other services | 2008 |
| Golf PAY Ltd | Arts & recreation | 2019 |
| Gosditch Street Limited | Hospitality | 2023 |
| Graffiti Removal Ireland Limited | Administrative & support | 2004 |
| Graham Freelance Co Ltd | Professional & scientific | 2023 |
| Grange Technical Consultants Ltd | Professional & scientific | 2017 |
| Granley Blinds Holdings Limited | Financial services | 2021 |
| Granley Blinds Limited | Manufacturing | 1976 |
| Grapple & Strike Limited | Arts & recreation | 1999 |
| Grasshoppers Limited | Administrative & support | 2005 |
| Grays of Sherston LLP | | 2017 |
| Green Door Homes Limited | Real estate | 2002 |
| Green Spark Consultants Ltd | Information & communication | 2013 |
| Greene's Bathrooms Ltd | Wholesale & retail | 2023 |
| Greener Wilder Limited | Professional & scientific | 2017 |
| Greenheart Aaai (Ghana) Ltd | Construction | 2014 |
| Greenheart Energy Engineering Limited | Construction | 2000 |