| Gama Aviation | Farnborough | A rating |
| GAMA SERVICES LONDON LIMITED | London | A rating |
| Gamco Asset Management (UK) Limited | London | A rating |
| GameAnalytics Ltd | London | A rating |
| Games Workshop Ltd | Nottingham | A rating |
| Gaming Technology Solutions Ltd (Trading as GTS Ltd) | London | A rating |
| GAN (UK) Limited | London | A rating |
| GAN Integrity Solutions Ltd. | London | A rating |
| Gansam London Office | London | A rating |
| Gantrade Europe Limited | Staines upon Thames | A rating |
| Gap Europe Ltd | London | A rating |
| GARAVI GUJARAT PUBLICATIONS LTD | LONDON | A rating |
| Gard (UK) Limited | London | A rating |
| Gardasoft Vision Ltd | Cambridgeshire | A rating |
| Gardiner & Theobald LLP | London | A rating |
| Gardline Marine Sciences Limited | Great Yarmouth | A rating |
| Garmin Europe Ltd | Southampton | A rating |
| GARP UK Limited | London | A rating |
| Garrigues UK LLP | London | A rating |
| Gartner UK Limited | Egham | A rating |
| Garware Hi-Tech Films International Limited | London | A rating |
| Gassco AS UK | Hull | A rating |
| Gate Gourmet London Limited | Staines-Upon-Thames | A rating |
| Gatehouse Bank plc | London | A rating |
| Gatemore Capital Management | London | A rating |
| Gates Foundation | London | A rating |
| Gateway Digital UK Limited | Hook | A rating |
| Gather Campaigns Ltd | Chester | A rating |
| Gattaca PLC | Whiteley | A rating |
| Gauri Limited | Lincoln | A rating |
| Gaw Capital Advisors (UK) Limited | London | A rating |
| GB Group Plc | Chester | A rating |
| GB INGREDIENTS LIMITED | FELIXSTOWE | A rating |
| GBL Advisors Ltd | London | A rating |
| GBM Securities Limited | London | A rating |
| GBT Travel Services UK Limited | London | A rating |
| GCB COCOA UK LTD | Glemsford | A rating |
| GCM Investments UK LLP | London | A rating |
| GCP Applied Technologies (UK) Limited | Slough | A rating |
| GCS Compliance Services Europe Unlimited Company trading as NAVEX Global | Hammersmith | A rating |
| GDI Norfolk UK Limited | London | A rating |
| GDS PUBLISHING LIMITED | BRISTOL | A rating |
| GE Aviation Systems Limited | Cheltenham | A rating |
| GE Medical Systems Limited | Chalfont St. Giles | A rating |
| GE Vernova International LLC | Leeds | A rating |
| GEA Refrigeration UK Ltd | Sittingbourne | A rating |
| Gear Construction UK Limited | Waltham Cross | A rating |
| Geberit Sales Limited | Warwick | A rating |
| Geely Auto UK Limited | Milton Keynes | A rating |
| Geely Design UK Ltd | Coventry | A rating |
| Gefyra Waterproofing Limited | London | A rating |
| Gelato Group UK Limited | London | A rating |
| Gelion PLC | Norwich | A rating |
| GEMBA FINANCE LTD | London | A rating |
| Gemfields Limited | London | A rating |
| Gemological Institute of America London (GIA England t/a GIA London) | London | A rating |
| GENDA Europe Ltd | London | A rating |
| Genel Energy UK Services Limited | London | A rating |
| General Assembly Space Limited | London | A rating |
| GENERAL ATLANTIC LIMITED | LONDON | A rating |
| General Catalyst Group Management UK Limited | London | A rating |
| General Conference of Seventh-day Adventists, Trans-European Division | St Albans | A rating |
| General Dynamics United Kingdom Limited | Newport | A rating |
| General Fusion UK Limited | London | A rating |
| General HVAC Solutions UK Ltd | Elstree | A rating |
| General Intuition UK Ltd | Stockport | A rating |
| General Mills (UK) Ltd | Uxbridge | A rating |
| General Nuclear International Limited | London | A rating |
| General Physics (UK) Ltd | London | A rating |
| Generali Real Estate S.P.A | London | A rating |
| Generate UK Holdings Limited | London | A rating |
| Generation Investment Management LLP | London | A rating |
| Generator Hostels Ltd | London | A rating |
| Generics [UK] Ltd t/a Mylan | Hatfield | A rating |
| GENERTEC (UK) LIMITED | LONDON | A rating |
| Genesis Analytics | London | A rating |
| Genesis Cancer Care UK Ltd | Waterlooville | A rating |
| GENESIS ENERGY AND POWER LIMITED | London | A rating |
| Genesis Motor UK Limited | London | A rating |
| Genesis Oil & Gas Consultants Limited | London | A rating |
| Genesys Telecommunications Laboratories - Europe Limited | London | A rating |
| Genetec UK Limited | London | A rating |
| Genius Sports UK Ltd | London | A rating |
| Genpact (UK) Ltd | London | A rating |
| GENSCRIPT BIOTECH (UK) LIMITED | OXFORD | A rating |
| GENSLER EUROPE LIMITED | LONDON | A rating |
| Genting Casinos UK Ltd | Birmingham | A rating |
| Gentrack UK Ltd | London | A rating |
| Genus Plc | Stapeley | A rating |
| Geolog UK Ltd. | Aberdeen | A rating |
| Geometry Global Limited | London | A rating |
| GEORGE P. JOHNSON (UNITED KINGDOM) LIMITED | LONDON | A rating |
| George Sexton Associates UK Limited | Norwich | A rating |
| Georgetown University (USA) UK Initiatives Organisation | London | A rating |
| Geoseacore Ltd | Helston | A rating |
| Geosec Ground Engineering Ltd | London | A rating |
| Geoslam Limited | Ruddington | A rating |
| Geosyntec Consultants Ltd | Delph | A rating |
| Geotab (UK ) Ltd | London | A rating |
| GEOXYZ UK LIMITED | Aberdeen | A rating |
| Gerald UK Limited | London | A rating |
| Gerard Daniels UK Ltd | London | A rating |
| Germains Seed Technology (a division of ABF Grain Products Limited) | London | A rating |
| German Academic Exchange Service | London | A rating |
| German National Tourist Office | London | A rating |
| Gerson Lehrman Group | London | A rating |
| Gessi UK Limited | London | A rating |
| Gestamp Tallent Limited | Newton Aycliffe | A rating |
| Getinge Limited | Derby | A rating |
| Getir UK Limited | London | A rating |
| Getronics Services UK Limited | London | A rating |
| Getty Images (UK) Ltd | London | A rating |
| GEZE UK Ltd | Lichfield | A rating |
| GF Engineering Group UK Ltd | London | A rating |
| GF Financial Markets (UK) Limited | London | A rating |
| GfK Retail and Technology UK Limited | London | A rating |
| GfK UK Ltd | London | A rating |
| GFS Global Group Limited | London | A rating |
| GFT Financial Limited | London | A rating |
| Ghana Cocoa Marketing Company (UK) Limited | London | A rating |
| Ghana Forestry Commission | London | A rating |
| Ghana International Bank PLC | London | A rating |
| GHO Capital Partners Advisory Ltd | London | A rating |
| GHO Capital Partners LLP | London | A rating |
| ghSMART UK Limited | London | A rating |
| Gi Group Recruitment Limited | Chesterfield | A rating |
| GI Partners UK Holdings Ltd | London | A rating |
| Gibson, Dunn & Crutcher UK LLP | London | A rating |
| GIC (London) Private Limited | London | A rating |
| GIC Capital Investments Private Limited - London Office | London | A rating |
| GIC of India UK Branch | London | A rating |
| GIC Private Markets Private Ltd | London | A rating |
| Gide Loyrette Nouel LLP | London | A rating |
| Giesecke+Devrient Currency Technology GB Ltd | Milton Keynes | A rating |
| Gieves Limited | London | A rating |
| GIG Facades Ltd | London | A rating |
| GIHE UK Limited | London | A rating |
| GIIR UK Ltd | Weybridge | A rating |
| Gilbarco Veeder-Root Ltd | Basildon | A rating |
| Gilead Sciences Europe Limited | London | A rating |
| Gingko Tree Investment Ltd | London | A rating |
| Giovanni Rana (UK) Ltd | Windsor | A rating |
| Girl Effect | London | A rating |
| GIS-MIC UK LTD | London | A rating |
| GIST Impact | London | A rating |
| GITHUB SOFTWARE UK LTD | Motherwell | A rating |
| GIVAUDAN UK LTD | ASHFORD | A rating |
| Give Back Beauty UK Limited | London | A rating |
| Givex UK Corporation Limited | London | A rating |
| GKN Aerospace Service - Cowes | Cowes | A rating |
| GKN Aerospace Services | Luton | A rating |
| GKN Aerospace Services - Engineering and Technology | Bristol | A rating |
| GKN Aerospace Services - Filton | Bristol | A rating |
| GKN Aerospace Services Limited | Birmingham | A rating |
| GL & M UK Limited | London | A rating |
| Glanbia (UK) Limited | Birmingham | A rating |
| Glanbia Cheese Limited | Northwhich | A rating |
| Glass UK Civil Engineering LTD | Bishops Stortford | A rating |
| Glassbox Digital UK Ltd | NORWICH | A rating |
| Glassdoor Global Limited | London | A rating |
| GLD Brands Limited | Blairgowrie | A rating |
| Gleave Partnership Limited | London | A rating |
| Gleeds LLP | London | A rating |
| Gleiss Lutz | London | A rating |
| Glen Grant Limited t/a Campari UK | London | A rating |
| Glencore Energy UK Limited | London | A rating |
| Glencore Industrial Assets UK Limited | Maidenhead | A rating |
| Glencore UK Ltd | London | A rating |
| Glenmark Pharmaceuticals Europe Ltd | Watford | A rating |
| GLHR (UK) Holdings Limited | London | A rating |
| GLMX Europe Limited | London | A rating |
| Glo Currency UK Limited | Manchester | A rating |
| GLOBAL AIRPORT CONCIERGE LTD | London | A rating |
| Global Alliance for Improved Nutrition, UK | London | A rating |
| Global Banking School Limited | London | A rating |
| Global Brain Europe Limited | London | A rating |
| Global Capital Partners London Ltd | London | A rating |
| Global Education Management Systems Limited | Bristol | A rating |
| Global Energy London LTD | London | A rating |
| Global eProcure Ltd. | London | A rating |
| Global Experience Specialists (GES) Limited | Birmingham | A rating |
| Global Fashion Group UK Services Limited | London | A rating |
| Global Futures and Options Ltd | London | A rating |
| Global Gate Capital Partners (UK) LLP | London | A rating |
| Global Health Strategies Limited | Milton Keynes | A rating |
| Global Imaging Ltd | London | A rating |
| Global Infrastructure Management LLP | London | A rating |
| Global International Trading Limited | Ipswich | A rating |
| Global Learning Europe Ltd | London | A rating |
| Global Leisure Partners LLP | London | A rating |
| Global Loan Agency Services | London | A rating |
| Global Luxury London Limited | London | A rating |
| Global Metcorp Limited | Harrow | A rating |
| Global Pacific UK Limited | Towcester | A rating |
| Global Parametrics Limited | London | A rating |
| Global Partners (UK) Ltd | Horley | A rating |
| Global Payments UK Ltd | Leicester | A rating |
| Global PEO Services Limited | Bracknell | A rating |
| Global Publishing Solutions Ltd | Swindon | A rating |
| Global Relay UK Limited | London | A rating |