| Guy Hollaway Architects Limited t/as Guy Hollaway Architects | Hythe | A rating |
| Guy's and St Thomas' Foundation | London | A rating |
| Guy's and St. Thomas' NHS Foundation Trust | London | A rating |
| Guyatt House Care Ltd | Cambridge | A rating |
| Guyson International Ltd | Skipton | A rating |
| GV & Sons LTD | Leicester | A rating |
| GV Supermarket | GWENT | A rating |
| GV UK Management Company, Limited | London | A rating |
| GVA GROUP LTD | Slough | A rating |
| GVA Lighting Europe Limited | London | A rating |
| GVC LTD | Peterborough | A rating |
| GVI Travel Limited | Uckfield | A rating |
| GVINFO LTD | Edinburgh | A rating |
| GVL HANTS LTD T/A PREMIER | Petersfield, | A rating |
| GVR SOFTECH LTD | MiltonKeynes | A rating |
| GVS Filter Technology UK Ltd | Lancaster | A rating |
| GVZ GLASSHOUSES LTD | Colchester | A rating |
| GW Active Ltd | Walton-On-Thames | A rating |
| GW ART STUDIO LTD | Nottingham | A rating |
| GW Building Developments Limited | Hucknall | A rating |
| GW Consulting Engineers Ltd | Kidderminster | A rating |
| GW Development (UK) Ltd | Bushey | A rating |
| GW Estate Agents Ltd | NOTTINGHAM | A rating |
| GW Fashions Ltd | Manchester | A rating |
| GW Leeds Limited | HUDDERSFIELD | A rating |
| GW Partners LTD (t/a Metta) | London | A rating |
| GWB Entertainment (UK) Limited | London | A rating |
| GWD International Ltd | Moreton In Marsh | A rating |
| GWDM LTD | London | A rating |
| Gwendolen House Nursery School Limited | London | A rating |
| GWENT TRAVEL SOLUTIONS LTD | Newport | A rating |
| Gwernllwyn Care Home | Llanelli | A rating |
| Gwesty Wynnstay Cyf. | Machynlleth | A rating |
| GWP Software Solutions Limited t/a FormusPro | Hereford | A rating |
| GWS Windows & Plastic Centre Ltd | High Wycombe | A rating |
| GWUK Owner Limited | Gullane | A rating |
| GXI LTD | London | A rating |
| GXO Logistics UK Limited | Northampton | A rating |
| GXO ServiceTech Ltd | Oldham | A rating |
| GXP Engaged Auditing Services Ltd | Kent | A rating |
| GXPRESS SOLUTIONS LTD | Harmondsworth | A rating |
| Gylden Pharma | Abingdon | A rating |
| GYM ARMOR LTD | Bolton | A rating |
| GYMNASIUM | LONDON | A rating |
| Gympass UK Limited | London | A rating |
| Gymshark Ltd | Solihull | A rating |
| GYMX NW LTD | Rochdale | A rating |
| GYPSY CAPITAL LTD | Gloucester | A rating |
| Gyro Technologies Ltd | Tewkesbury | A rating |
| GYROGEAR LIMITED | LONDON | A rating |
| GYROS | Great Yarmouth | A rating |
| Gyroscope Therapeutics Limited | LONDON | A rating |
| Gyrus Medical Limited | Cardiff | A rating |
| GYU Limited | Harrow | A rating |
| GYXIS CORPORATION | London | A rating |
| GZD LIMITED | London | A rating |