| Ginger Training and Coaching Ltd | Other services | 2010 |
| Glamgalores Ltd | Wholesale & retail | 2025 |
| Glassford Plus Limited | Real estate | 2019 |
| Global Inox Limited | Wholesale & retail | 2025 |
| Go Opulence Limited | Wholesale & retail | 2023 |
| Godwin Personal Limited | Wholesale & retail | 2019 |
| Golden Abodes Ltd | Real estate | 2023 |
| Golden Property Group (UK) Limited | Real estate | 2015 |
| Goodman Price Demolition Limited | Construction | 2025 |
| GPG Portland Road Limited | Extraterritorial | 2018 |
| Grace Inc Ltd | Public administration | 2023 |
| Gracito Assets Ltd | Professional & scientific | 2018 |
| Grand Slam Goods Ltd | Manufacturing | 2023 |
| Green Idea Holding UK Ltd | Financial services | 2024 |
| Greenhow Consulting Ltd | Information & communication | 2023 |
| Greenseed Ltd | Professional & scientific | 2024 |
| Greyhound Building Services Ltd | Construction | 2019 |
| Greywood Security Solutions Limited | Information & communication | 2022 |
| Grit & Joy Limited | Manufacturing | 2017 |
| GUE Holdings Ltd | Information & communication | 2025 |
| GUY Building Services Ltd | Construction | 2013 |
| H&J Smartstay Properties Ltd | Real estate | 2024 |
| H-Best Consulting Ltd | Professional & scientific | 2020 |
| Habgood Construction Ltd | Construction | 2018 |
| Hadji Ltd | Wholesale & retail | 2023 |
| Hallett Plumbing and Heating Limited | Construction | 2005 |
| Hampton Yarns Limited | Wholesale & retail | 2019 |
| Happy Praiser Limited | Manufacturing | 2025 |
| Happy Shopping Ltd | Wholesale & retail | 2024 |
| Hargreaves Writing Ltd | Information & communication | 2015 |
| Harion Limited | Real estate | 2021 |
| Harmony by DR Naing Ltd | Health & social care | 2025 |
| Harrison Brands Limited | Professional & scientific | 2020 |
| Hartham Scientific Consulting Limited | Professional & scientific | 2025 |
| Harvey Stone Ltd | Professional & scientific | 2017 |
| Harwood Mews Residents Limited | Households | 1999 |
| Havenwise Limited | Information & communication | 2024 |
| HCD Consulting Ltd | Information & communication | 2024 |
| HDL Strategy Consultancy Ltd | Information & communication | 2025 |
| Heabo House Limited | Wholesale & retail | 2025 |
| Header Ventures Ltd | Information & communication | 2021 |
| Health Youth Joy Limited | Wholesale & retail | 2024 |
| Hear ME I CAN I AM Ltd | Manufacturing | 2024 |
| Hekima Enterprises Ltd | Real estate | 2018 |
| Henglein Ltd | Financial services | 2025 |
| Hereford ENT Clinic Ltd | Health & social care | 2023 |
| Hertech Ltd | Information & communication | 2020 |
| HEY Alfie Group Limited | Financial services | 2024 |
| HEY Alfie UK Limited | Information & communication | 2024 |
| Holat Group Ltd | Wholesale & retail | 2025 |
| Holbein Property Innovation Ltd | Energy | 2023 |
| Holistic Healing Therapy Ltd. | Health & social care | 2016 |
| House of Genevieve Ltd. | Wholesale & retail | 2025 |
| Hprop 5 Ltd | Construction | 2021 |
| Humble.Io Ltd | Information & communication | 2020 |
| Hyatts Field Limited | Other services | 2022 |
| I Brain Health Ltd | Health & social care | 2022 |
| IAN Metchette Construction Ltd | Construction | 2013 |
| IC Psychology Solutions Ltd | Health & social care | 2023 |
| ID8 Productions Ltd | Information & communication | 2015 |
| Ignate Ltd | Financial services | 2020 |
| IH Power for Electric Generators Ltd | Manufacturing | 2025 |
| Iluvo Investments Ltd | Financial services | 2025 |
| Impact CM Ltd | Administrative & support | 2012 |
| Impressions Decorating Limited | Construction | 2023 |
| IN2HOLIDAYS Ltd | Administrative & support | 2024 |
| Infusion Technologies Limited | Information & communication | 2023 |
| Ingenium Real Estate Ltd. | Real estate | 2014 |
| Inicio Talent Limited | Administrative & support | 2023 |
| Innocent Eyecare Limited | Health & social care | 2010 |
| Inny Creative Ltd | Professional & scientific | 2015 |
| International Crew Solutions Limited | Administrative & support | 2015 |
| Ipcore Ltd | Information & communication | 2024 |
| Iprocure Limited | Information & communication | 2011 |
| Iridescence Group Ltd | Information & communication | 2025 |
| Iron Trucking Ltd | Transport & logistics | 2025 |
| Ista Global Arts Learning Ltd | Other services | 1995 |
| Istock Ltd | Wholesale & retail | 2022 |
| ITS Accountant Limited | Professional & scientific | 2025 |
| J M Songs Limited | Information & communication | 2001 |
| J&R Legacy Ltd | Wholesale & retail | 2021 |
| J. Cahill & Company Limited | Professional & scientific | 2019 |
| Jack Renwick Studio Ltd | Professional & scientific | 2012 |
| Jacket Elite Limited | Wholesale & retail | 2025 |
| James Global Solutions Limited | Administrative & support | 2012 |
| Jawzar Ltd | Wholesale & retail | 2025 |
| JB Music Services Ltd | Information & communication | 2022 |
| JDS Consulting Ltd | Professional & scientific | 2023 |
| Jelly and Cream Ltd | Information & communication | 2023 |
| Jenna Leigh Limited | Professional & scientific | 2014 |
| JG Law Ltd | Professional & scientific | 2012 |
| Jgraham Design Ltd | Professional & scientific | 2023 |
| JHM Accounting Ltd | Professional & scientific | 2025 |
| JIA Beatz Productions Ltd | Wholesale & retail | 2019 |
| Jiba Tech Ltd | Wholesale & retail | 2024 |
| Jill Waters Limited | Other services | 2014 |
| Jjnn Homes Ltd | Real estate | 2022 |
| JL Sports Investment Ltd. | Professional & scientific | 2019 |
| JL Virtual Solutions Ltd | Administrative & support | 2025 |
| JMO Healthcare Limited | Health & social care | 2015 |