| G CAN DO Ltd | London | 2018 |
| G E Tolley Public Sector Consultancy Limited | Wheathampstead | 2022 |
| G H Safety Ltd | Bangor | 2023 |
| G Johnson Health Care Limited | Cardiff | 2013 |
| G W Gates Fire & Safety Ltd | Oxted | 2016 |
| G&A Fire & Security Ltd | Halesworth | 2025 |
| G&N Signature Ltd | London | 2023 |
| G.A.P. Health & Social Care Ltd | London | 2019 |
| G1 Fire and Rescue Limited | Rochester | 2019 |
| G2G Caring Limited | Paisley | 2025 |
| G4S Care and Justice Services (UK) Limited | London | 1944 |
| G6 Care Ltd | Worcester | 2025 |
| G7 Security Services Limited | Dagenham | 2021 |
| G95 Consulting Limited | York | 2025 |
| GA Care Limited | Henlow | 2023 |
| GABERO2 Limited | Waterlooville | 2019 |
| Gabijan Ltd | Nottingham | 2026 |
| Gabson Healthcare Ltd | Aldershot | 2022 |
| GAG Empire Ltd | Wolverhampton | 2023 |
| Galapagos Healing Ltd | London | 2020 |
| Galmviv Ltd | Aylesbury | 2026 |
| Ganikay Care Ltd | Manchester | 2020 |
| GAP & Co Properties Limited | Worcester | 2015 |
| Garantorix Recovery Ltd | London | 2025 |
| Gardant Community Safety Team CIC | Barnstaple | 2026 |
| Garden in Mind CIC | Bromley | 2024 |
| Gareth Crouton Kelly Ltd | Birmingham | 2020 |
| Gareth N Jones TM Ltd | Doncaster | 2025 |
| Garnets Foundation | London | 2023 |
| Garrad Enterprises Ltd | Tenbury Wells | 2018 |
| Gartmore Supply Services Limited | London | 2026 |
| Gary Laird Safety Associates Limited | Huddersfield | 2018 |
| Gary Timms TM Ltd | Doncaster | 2023 |
| Gastroc Ltd | Wynyard | 2025 |
| Gates Training Services Ltd | Liverpool | 2025 |
| Gateway Health Care Services Ltd | Thamesmead | 2020 |
| Gateway HSE Solutions Ltd | Newport | 2020 |
| Gateway Training & Consultancy Limited | Glossop | 2005 |
| Gathering Nature Ltd | Aboyne | 2022 |
| Gatta Ltd | Sittingbourne | 2023 |
| Gatwick Litigations Limited | Horley | 2021 |
| Gavin Humble TM Ltd | Doncaster | 2023 |
| Gaza the Ginger Ltd | Warrington | 2019 |
| GB Alliance Healthcare Ltd | Edinburgh | 2022 |
| GB Consultants (London) Ltd | London | 2006 |
| GB Fire Safety Ltd | Derby | 2015 |
| GB Fire Safety Solutions Ltd | Bournemouth | 2025 |
| GB Fire Solutions Ltd | Halesowen | 2022 |
| GB Integrated Systems Ltd | Colne | 2006 |
| Gbfra Limited | Llanfairpwllgwyngyll | 2023 |
| GBK Consulting Ltd | Edgware | 2023 |
| GBM Authorised Representative Limited | Godalming | 2000 |
| GBP Safety Training & Consultancy Ltd | Portsmouth | 2014 |
| GC EKE Limited | Bedford | 2019 |
| GCB Fire Safety Solutions Limited | Solihull | 2024 |
| GD Associates (Nottingham) Ltd | Nottingham | 2012 |
| GDG Forensic Medical Services Ltd. | Cambridge | 2014 |
| GE Engineering Services Limited | Middlesbrough | 2015 |
| GE Fire Consultancy Ltd | Poulton-Le-Fylde | 2024 |
| GEC Safety Ltd | Newcastle Upon Tyne | 2019 |
| Gelatura Limited | London | 2016 |
| GEM Group 365 Limited | Bagshot | 2024 |
| GEM OT Ltd | Manchester | 2026 |
| GEM Safety Solutions Limited | Great Yarmouth | 2025 |
| Gemini Healthcare Consultancy Ltd | South Petherton | 2019 |
| Gemini Specialist Services Limited | Aberdeen | 2020 |
| General Dynamics United Kingdom Limited | London | 1985 |
| General Fire Protection Ltd | Watford | 2023 |
| General Fire Safety Ltd | London | 2026 |
| General Safety Services Nederland Ltd. | Doncaster | 2010 |
| General Services and Consultation Ltd | London | 2023 |
| Generalco Limited | Devon | 2003 |
| Generational Planning Group Ltd | Sevenoaks | 2019 |
| Generic Care Limited | Liverpool | 2025 |
| Genesis Advisory Ltd | Frome | 2025 |
| Genesis Living Ltd | Warwick | 2019 |
| Genetic Experts UK Ltd | Lincoln | 2021 |
| Geneva (CH) Ltd | London | 2026 |
| GENIUS200 Limited | Wembley | 2022 |
| Gentiumuk K9 Operations Limited | Doncaster | 2021 |
| Gentle Bliss Limited | Kettering | 2024 |
| Gentle Care Group Holdings Ltd | Skegness | 2025 |
| Gentle Care Services Limited | Port Talbot | 2019 |
| Gentle Hands Care Space Ltd | London | 2023 |
| Gentle Path Care Ltd | Walsall | 2021 |
| Gentle Personalised Hands Care Services Limited | Sittingbourne | 2023 |
| Genuine Care Services Limited | Bromley | 2025 |
| Genuine Needs Ltd | Lincoln | 2020 |
| Geoff Yale Consultancy Limited | Preston | 2015 |
| George Hardiman TM Ltd | Doncaster | 2025 |
| Georgi Social Care Ltd | Poole | 2025 |
| Geostrategy Limited | London | 2021 |
| Geovida Healthcare and Property Services Ltd | Erith | 2025 |
| Gersa Ltd | Cambridge | 2025 |
| GET a Quid Ltd | London | 2022 |
| Gettinghealth Limited | Bexley | 2019 |
| GFC Associate Services Ltd | London | 2019 |
| Gfps Projects Limited | Benfleet | 2019 |
| GFS (Scotland) Ltd | Glasgow | 2022 |
| Ggirl and Daughter Ltd | London | 2023 |