| Green Apple Packages Ltd | Administrative & support | 2021 |
| Greenline Stores Ltd | Wholesale & retail | 2025 |
| Grey Wolf IT Solutions Limited | Information & communication | 2025 |
| GS Medical Services Limited | Health & social care | 2015 |
| GS Trading One Ltd | Wholesale & retail | 2022 |
| Gumtree IP SA Holding Ltd | Administrative & support | 2021 |
| Gyaldem MRS Ltd | Administrative & support | 2018 |
| H & H Presenting Ltd | Arts & recreation | 2022 |
| Habib Rahman Ltd | Real estate | 2016 |
| Happy Finds Ltd | Wholesale & retail | 2025 |
| Harry Hatcher Ltd | Information & communication | 2024 |
| Harrybean Ltd | Wholesale & retail | 2026 |
| Harvestline Ventures Limited | Wholesale & retail | 2025 |
| Haven Group Tech Ltd | Information & communication | 2026 |
| HB Prime Outlet Ltd | Wholesale & retail | 2025 |
| Heyteam Limited | Information & communication | 2025 |
| High Life Maker Limited | Wholesale & retail | 2024 |
| High Star Arts and Production Ltd | Other services | 2008 |
| HOC Trading Limited | Wholesale & retail | 2024 |
| Hochland Ltd | Wholesale & retail | 2025 |
| Holycomfy Ltd | Wholesale & retail | 2026 |
| Honey BEE Vitals Ltd | Other services | 2025 |
| Hook Solutions Limited | Transport & logistics | 2025 |
| Houi Care Group Ltd | Administrative & support | 2025 |
| House for Hope Limited | Health & social care | 2020 |
| Huggins Homes Ltd | Real estate | 2021 |
| Huggins Homes Rentals Ltd | Real estate | 2022 |
| Humane Management Ltd | Manufacturing | 2025 |
| Hunter Content Ltd | Information & communication | 2025 |
| Hussain & Estate Holdings Ltd | Real estate | 2024 |
| Hydrogen Building & Maintenance Ltd | Construction | 2020 |
| Hyperrealm Studios Ltd | Information & communication | 2024 |
| Icarus Recruitment Limited | Administrative & support | 2021 |
| Icon Indoor Shops Ltd | Real estate | 2024 |
| Idaisi Ltd | Wholesale & retail | 2024 |
| Ideal Simple Solutions Ltd | Professional & scientific | 2019 |
| IG Trading Limited | Wholesale & retail | 2023 |
| IH Express Cars Ltd | Wholesale & retail | 2026 |
| Illume Consulting Ltd | Wholesale & retail | 2025 |
| Imani Distribution Ltd | Wholesale & retail | 2025 |
| Imdad Hive Ltd | Wholesale & retail | 2025 |
| IMJ Wholesale Ltd | Wholesale & retail | 2026 |
| Infac Services Limited | Construction | 1995 |
| Infinity Real Estate Investments Ltd | Other services | 2020 |
| Infinity SRL Ltd | Water & waste | 2026 |
| Inmotion Cleaning Services Limited | Administrative & support | 2025 |
| Insoo Ltd | Wholesale & retail | 2023 |
| Inspiration Support Services Limited | Education | 2012 |
| Intausys Ltd | Information & communication | 2017 |
| Integral Concept Partners Ltd | Information & communication | 2026 |
| Intelligent Solutions Centre Ltd | Professional & scientific | 2003 |
| Intercapital DLK Ltd | Real estate | 2021 |
| Interfacade Limited | Construction | 2020 |
| Intermind Limited | Wholesale & retail | 2026 |
| Intsole Ltd | Wholesale & retail | 2022 |
| Invesco AM Ltd | Real estate | 2020 |
| Investec US Ltd | Real estate | 2021 |
| Iqbal's Limited | Wholesale & retail | 2014 |
| IR Sports Ltd | Wholesale & retail | 2024 |
| Iremia WOS Ltd | Other services | 2018 |
| Iserv Properties Ltd | Real estate | 2023 |
| Isucceed Limited | Hospitality | 2021 |
| IVY & Gold Care Services Limited | Health & social care | 2025 |
| J C Motor Sales Limited | Wholesale & retail | 2025 |
| J I Partridge Limited | Other services | 2007 |
| J Mccarthy Contracts Limited | Construction | 2014 |
| J.L. & N. Frewin Limited | Real estate | 1978 |
| Jagland Tech Ltd | Wholesale & retail | 2021 |
| Jangoz E Commerce Limited | Wholesale & retail | 2025 |
| Jayadasa Ltd | Information & communication | 2022 |
| Jego Lite Limited | Wholesale & retail | 2021 |
| JEM Property Holdings Limited | Real estate | 2019 |
| Jepi Fashion Ltd | Wholesale & retail | 2025 |
| JJC Electrical Services Ltd | Construction | 2021 |
| JK Transport INT Limited | Transport & logistics | 2023 |
| JLK Business Consultancy Limited | Administrative & support | 2017 |
| Join the Bits Limited | Information & communication | 2009 |
| Jonsor Apparel Ltd | Wholesale & retail | 2026 |
| Josh Construction Limited | Construction | 2013 |
| Journey Just Come the Arts Ltd | Wholesale & retail | 2020 |
| Juno Ltd | Financial services | 2025 |
| Just to WAX Detailing Ltd | Other services | 2018 |
| JW Connections Limited | Professional & scientific | 2025 |
| K R M Kaileigh Trade Limited | Wholesale & retail | 2024 |
| K2 Construction (London) Limited | Construction | 2017 |
| K50 Limited | Real estate | 2017 |
| KA Industries Ltd | Wholesale & retail | 2026 |
| Kaiduo Ltd | Wholesale & retail | 2024 |
| Kairos Media Communications Ltd | Professional & scientific | 2020 |
| Kaiyum Enterprises Ltd | Real estate | 2024 |
| Kamal Ahmad Ltd | Wholesale & retail | 2025 |
| Key Properties Sourcing Ltd | Administrative & support | 2025 |
| Khan Builders London Ltd | Construction | 2020 |
| Kids Deziah Business CIC | Education | 2025 |
| Kids Explorer Limited | Health & social care | 2023 |
| Kilburn Facilities Management Ltd | Wholesale & retail | 2024 |
| KKM Psychology Services Ltd | Health & social care | 2022 |
| Klimax Family Hub CIC | Health & social care | 2020 |
| Knowing Communications Limited | Professional & scientific | 2021 |
| Knsonsrecovery Ltd | Transport & logistics | 2024 |