| Grey Raven Homes Ltd | Real estate | 2025 |
| Grey Site Art and Culture Ltd | Arts & recreation | 2026 |
| Grid Frontier Ltd | Information & communication | 2025 |
| Gridvolt Storage Ltd | Professional & scientific | 2026 |
| Grilla Energy Ltd | Manufacturing | 2023 |
| Grit Coaching Academy Ltd | Education | 2025 |
| Grizzly Autos Ltd | Wholesale & retail | 2024 |
| GRJ Automotive Ltd | Professional & scientific | 2025 |
| Groundname Ltd | Information & communication | 2024 |
| Groutgleam Ltd | Administrative & support | 2024 |
| Grovixa Capital Ltd | Financial services | 2025 |
| Grow Mark Ltd | Professional & scientific | 2026 |
| Growmatrix Limited | Information & communication | 2023 |
| Growth Clinical Partnership LLP | | 2025 |
| Growth Gateway AI Ltd | Information & communication | 2024 |
| Growth Mindset Mastermind Limited | Education | 2019 |
| Growthisaac Solutions Ltd | Information & communication | 2025 |
| GSB Photography Limited | Manufacturing | 2024 |
| GSP Coaching & Business Soultions Ltd | Professional & scientific | 2025 |
| Gssnsv Ltd | Wholesale & retail | 2024 |
| Gssnsv Retail Ltd | Wholesale & retail | 2026 |
| GT Experts Ltd | Information & communication | 2025 |
| Gtechnics Ltd | Education | 2022 |
| Gtite Ltd | Real estate | 2020 |
| Guardian Agency Limited | Professional & scientific | 2024 |
| Guardian Digital Ltd | Information & communication | 2018 |
| Guardian Solutions Ltd | Professional & scientific | 2010 |
| Guava Living Ltd | Wholesale & retail | 2026 |
| Guest Posting Solution Ltd | Wholesale & retail | 2026 |
| Guestpassgolf Ltd | Information & communication | 2026 |
| Guidenexus Consulting Limited | Information & communication | 2024 |
| Guidestone Travel Ltd | Administrative & support | 2026 |
| Guise Consulting Limited | Professional & scientific | 2022 |
| Guiva Ltd | Wholesale & retail | 2015 |
| Gulflinks Trading Ltd | Wholesale & retail | 2025 |
| Gullze Limited | Wholesale & retail | 2026 |
| Gundog Catalogue Ltd | Wholesale & retail | 2023 |
| Gunning for GOD Ltd | Wholesale & retail | 2025 |
| Gurg Limited | Information & communication | 2007 |
| Gymgarmz Clothing Ltd | Wholesale & retail | 2025 |
| H & C Projects Limited | Administrative & support | 2023 |
| H & K Property Solutions Ltd | Construction | 2025 |
| H Introductions Limited | Information & communication | 2024 |
| H Tech Labs Ltd | Information & communication | 2025 |
| H.Chef Services Ltd | Hospitality | 2019 |
| H44 Ltd | Information & communication | 2015 |
| HA Consultancy Group Limited | Information & communication | 2025 |
| Habib Business Limited | Information & communication | 2022 |
| Habice Haven Ltd | Hospitality | 2025 |
| Habzee Foods Limited | Manufacturing | 2026 |
| Haci Yilmaz Ltd | Wholesale & retail | 2025 |
| Hacienda II Limited | Manufacturing | 2017 |
| HAE Systems Ltd | Information & communication | 2026 |
| Haelmos Trade Ltd | Wholesale & retail | 2026 |
| Haemcon Ltd | Wholesale & retail | 2025 |
| Hagen Property Ltd | Real estate | 2023 |
| Hail Security Limited | Wholesale & retail | 2024 |
| Haima Network Technology Ltd | Wholesale & retail | 2024 |
| Hair by Angel Ltd | Wholesale & retail | 2026 |
| Halal Fitness Ltd | Wholesale & retail | 2023 |
| Halalicious Sweets Ltd | Wholesale & retail | 2024 |
| Halcyondays Services Ltd | Health & social care | 2025 |
| Half Moon Media Limited | Wholesale & retail | 2024 |
| Halfpenny Communications Ltd | Professional & scientific | 2014 |
| Halimi Ltd | Wholesale & retail | 2026 |
| Hall of Heritage CIC | Education | 2026 |
| Halliwell Abigail Patricia Ltd | Wholesale & retail | 2026 |
| Hallmarsh Properties Limited | Administrative & support | 2006 |
| Hallstech Ltd | Information & communication | 2026 |
| Halnix UK Ltd | Wholesale & retail | 2026 |
| Halo HR Limited | Administrative & support | 2025 |
| Halton Shaw Limited | Administrative & support | 2025 |
| Hamisha Ltd | Health & social care | 2023 |
| Hammergrid Tech Ltd | Wholesale & retail | 2025 |
| Hammond Property Consultants Ltd | Hospitality | 2024 |
| Hampshire Home Services Ltd | Manufacturing | 2025 |
| Hampshire Shoulder Clinic Ltd | Health & social care | 2014 |
| Hampton Contract Services Limited | Information & communication | 2026 |
| Hamundr Risk Management Ltd | Administrative & support | 2023 |
| HAN Global Consultancy Ltd | Wholesale & retail | 2026 |
| Handl Homes Limited | Administrative & support | 2024 |
| Handmora Limited | Wholesale & retail | 2025 |
| Handpick Studio Ltd | Wholesale & retail | 2026 |
| Handybsl Limited | Education | 2025 |
| Hangdog Limited | Information & communication | 2022 |
| Hani Homes Ltd | Real estate | 2025 |
| Haniahmed Ltd | Information & communication | 2025 |
| Hanium Limited | Information & communication | 2026 |
| Haogroup Ltd | Wholesale & retail | 2023 |
| Happy Harvey Company Ltd | Wholesale & retail | 2025 |
| Happy Pair Wines Ltd | Wholesale & retail | 2021 |
| Happy Valley Ventures Ltd | Real estate | 2021 |
| Haptap Limited | Information & communication | 2024 |
| Harbec PM Limited | Construction | 2014 |
| Harborhouse Ltd | Wholesale & retail | 2026 |
| Harbourside Property Services Ltd | Construction | 2024 |
| Hark Solutions Limited | Information & communication | 2004 |
| Harland Building Controls Ltd | Information & communication | 2025 |
| Harlow Labelling Services | | 1998 |
| Harlow Living Limited | Real estate | 2026 |