| Grosvenor Community Associates Limited | Wirral | 2009 |
| Ground Beetle Ltd | Walsall | 2018 |
| Grounding Roots Rehabilitation C.I.C. | London | 2025 |
| Group Two Limited | Lydd | 1998 |
| Grove Support Services Ltd | Bradford | 2026 |
| Grovehurst Health Limited | Sittingbourne | 2025 |
| Grow Care Agency Limited | Swanscombe | 2022 |
| GRS Drone Services Limited | Welshpool | 2024 |
| Gssc Limited | Ashford | 2012 |
| GT Firepoint Ltd. | Corsham | 2012 |
| GT IT Ltd | Swansea | 2021 |
| Guardian Fire Protection Ltd | Stockport | 2022 |
| Guardian Fire Safety Management Ltd | Ipswich | 2014 |
| Guardian Fire Solutions Limited | Wallasey | 2025 |
| Guardian Healthcare Services Ltd | Basildon | 2025 |
| Guardian of the Poor Limited | Birmingham | 2025 |
| Guardian Sky Defence Ltd | Carterton | 2026 |
| Guardians Health Care Limited | Welling | 2021 |
| Guarding UK Ltd | Loughton | 2003 |
| Guiding Light Support Services Ltd | Corby | 2025 |
| Guiding Star Healthcare Services Ltd | Lincoln | 2025 |
| Guinea Community Law Hub CIC | Bexleyheath | 2026 |
| Gull Rock Events Ltd | Wadebridge | 2014 |
| Gulzar Ghouri Ltd | Kettering | 2021 |
| Gundayi Limited | Corby | 2026 |
| Gurleys Ltd | Colchester | 2022 |
| Gurukul-Uk CIC | Colchester | 2022 |
| GW Fire Services Ltd | Glasgow | 2023 |
| Gwanda Nation Ltd | Leyland | 2020 |
| Gwasirain Ltd | Birmingham | 2023 |
| GWD Fire Ltd | Swindon | 2024 |
| Gwina Ltd | London | 2019 |
| Gwybodus CYF. | Llandysul | 2020 |
| Gymbusy Impact CIC | London | 2026 |
| H & J Healthcare Service Ltd | London | 2024 |
| H Appiagyei Ltd | Chelmsford | 2026 |
| H C Governance Services Ltd | Chichester | 2017 |
| H2O Fire Protection Ltd | Aylesford | 2008 |
| H2O Fire Solutions Limited | Caerphilly | 2022 |
| H3RR Empire Ltd | London | 2025 |
| H95 Administration Limited | Swindon | 2019 |
| HA Consult Ltd | Birmingham | 2025 |
| Habilad Integrated Service Limited | Chatham | 2016 |
| Habitat Support Services Ltd | Cardiff | 2021 |
| Hackney Flower Show CIC | Bromley | 2024 |
| Hackshaws Healthcare Ltd | London | 2025 |
| Hadassah Ltd | Birmingham | 2018 |
| Haderm and Aesthetics Ltd | Cheadle | 2024 |
| Hahman Services Limited | Birmingham | 2018 |
| Hahnbeck Business Systems Ltd | London | 2016 |
| Haicharles Ltd | Croydon | 2021 |
| Hailsham Town Council CIC | Hailsham | 2018 |
| Hairy Toms Forest School CIC | Newark | 2026 |
| Halbolly Ltd | Epsom | 2023 |
| Haldis Solutions Ltd | Aberdeen | 2016 |
| Hall & KAY Fire Services Limited | London | 2004 |
| Hallam Counselling Limited | Blackpool | 2017 |
| Hallam Creative Enterprises Limited | London | 2007 |
| Hallie Care Limited | Waltham Cross | 2023 |
| Hallmark Compliance Ltd | Old Hall Road | 2022 |
| Hallmaster Ltd | Poole | 2017 |
| Halloumi UK Limited | Romford | 2022 |
| Halo Fire & Security Solutions Ltd | Leigh-On-Sea | 2024 |
| Halo Horizon Healthcare Ltd | Honiton | 2022 |
| Halo Research Technology Ltd | Milton Keynes | 2022 |
| Halow (Birmingham) | Birmingham | 2012 |
| Halstead & Associates (London) Limited | Taunton | 2010 |
| Haltwhistle Partnership Ltd | Haltwhistle | 1997 |
| Hamble Lifeboat Limited | Southampton | 1972 |
| Hamblin Care Support Service Limited | Wellingborough | 2020 |
| Hammer Fire & Compliance Ltd | Gravesend | 2025 |
| Hammers TM Ltd | Doncaster | 2024 |
| Hammykn Ltd | Waltham Cross | 2022 |
| Hampshire Fire and Medical Services Limited | Romsey | 2019 |
| Hampshire Fire Services Ltd | Broadway | 2007 |
| Hampshire Paediatricians Ltd | Waterlooville | 2024 |
| Hana Hairdresser CIC | London | 2022 |
| Hand in Hand Care Ltd | Doncaster | 2025 |
| Hand to Hand Care Ltd | Bexhill-On-Sea | 2018 |
| Handley Care Ltd | Chesterfield | 2017 |
| Hands on Heart Care Limited | Leeds | 2025 |
| Handz on Ltd | London | 2019 |
| Hanstacie Ltd | London | 2022 |
| Happy Baby Check Ltd | Billericay | 2025 |
| Happy Heaven Ltd | Bury | 2024 |
| Happy Nanny Ltd | London | 2025 |
| Happy Skincare Ltd | Leeds | 2026 |
| Happy When at Home Limited | Chichester | 2023 |
| Harborough Fire and Safety Ltd | Market Harborough | 2018 |
| Harbour and Shore Clinical Services Limited | Ashby-De-La-Zouch | 2026 |
| Harbour Health Limited | London | 2025 |
| Hard to Reach Young People Ltd | Ruislip | 2024 |
| Harikrishna Healthcare Limited | Chigwell | 2024 |
| Harland and Wolff, Public Limited Company | Belfast | 1885 |
| Harlequin PVT Ltd | Nottingham | 2018 |
| Harlesden Businesses Ltd | London | 2022 |
| Harley Beauty and Aesthetic Academy Limited | London | 2025 |
| Harley London Clinic Limited | London | 2025 |
| Harley Street Therapy Care Limited | London | 2024 |
| Harm Prevention CIC | South Ockendon | 2023 |