| Homes UK Holdings Limited | Professional & scientific | 2022 |
| Homestall Holdings Limited | Financial services | 2023 |
| Homestart Sales Progression Services Ltd | Real estate | 2020 |
| Homezz Property Ltd | Real estate | 2025 |
| Honework Ltd | Professional & scientific | 2022 |
| Honeydew Patisserie Limited | Hospitality | 2018 |
| Hooks Books Limited | Professional & scientific | 2010 |
| Hope House Healing Ltd | Health & social care | 2024 |
| Hope Way Limited | Wholesale & retail | 2025 |
| Hopkins Electrical Services Ltd | Construction | 2018 |
| Hopton Limited | Hospitality | 2015 |
| Hoque Assets Limited | Real estate | 2020 |
| Hoque Development Limited | Real estate | 2021 |
| Hoque Investment Limited | Real estate | 2021 |
| Hoque Leasehold 2 Limited | Real estate | 2025 |
| Hoque Property Holdings Limited | Real estate | 2017 |
| Horizon Prestige Ltd | Wholesale & retail | 2014 |
| Horology Haven Ltd | Wholesale & retail | 2025 |
| Horwood Homes and Construction Ltd | Construction | 2023 |
| Hoshi Roofing Ltd | Construction | 2022 |
| Hospitality H Limited | Hospitality | 2023 |
| Hotspur Hire Ltd | Administrative & support | 2020 |
| Houghton Cleaning Fairies Limited | Administrative & support | 2021 |
| Houghton Motors Ltd | Administrative & support | 2017 |
| Houghton Regis Radio CIC | Information & communication | 2026 |
| Houghton Sparkle Services Limited | Administrative & support | 2025 |
| Houghton Spice Ltd | Hospitality | 2018 |
| Hound Hill Park Limited | Hospitality | 2026 |
| House a Home Limited | Construction | 2020 |
| House a Home Property Services Ltd | Administrative & support | 2025 |
| House Klean Limited | Administrative & support | 2023 |
| House of Nailz Ltd | Other services | 2023 |
| House of Prayers and Dominion Chapel UK Limited | Other services | 2013 |
| Houseborn Engineering Ltd | Construction | 2020 |
| Howard Road Spicy Flames Ltd | Hospitality | 2019 |
| HQH Building Ltd | Construction | 2025 |
| HR 786 Limited | Real estate | 2014 |
| HR Motor Logistics Ltd | Transport & logistics | 2023 |
| Hrde Enterprise Ltd | Wholesale & retail | 2022 |
| HRP London Ltd | Health & social care | 2023 |
| HS Commercials Limited | Wholesale & retail | 2023 |
| HS Motor Traders UK Limited | Wholesale & retail | 2026 |
| HSA Enterprise Limited | Wholesale & retail | 2021 |
| Hubane Vara Ltd | Real estate | 2023 |
| Hubbleberry Stiltskins Limited | Information & communication | 2000 |
| Hudson Homes Estate Agents Ltd | Real estate | 2021 |
| Hudson Homes Property Group Ltd | Administrative & support | 2021 |
| Huku Kwetu Ltd | Hospitality | 2019 |
| Hullbray Limited | Manufacturing | 1976 |
| Humbug Partnership LLP | | 2023 |
| Hunsbury Limited | Hospitality | 2025 |
| Hunter Distribution Ltd | Wholesale & retail | 2015 |
| Hunter Goldman Accountancy Limited | Professional & scientific | 2018 |
| Huntleigh (SST) Limited | Financial services | 1991 |
| Huntleigh Healthcare Limited | Manufacturing | 1968 |
| Huntleigh International Holdings Limited | Professional & scientific | 1992 |
| Huntleigh Luton Limited | Professional & scientific | 1990 |
| Huntleigh Properties Limited | Professional & scientific | 1990 |
| Huntleigh Technology Limited | Professional & scientific | 1985 |
| Huracan Investment Ltd | Real estate | 2018 |
| Hutchings Services Limited | Construction | 2016 |
| Hy-Pro International Limited | Arts & recreation | 1992 |
| Hybic Ltd | Construction | 2015 |
| Hydraulic Power Group Ltd | Manufacturing | 2015 |
| Hype Studios Ltd | Professional & scientific | 2015 |
| Hypesupplyuk Ltd | Wholesale & retail | 2021 |
| Hyra Health Limited | Public administration | 2025 |
| I SIX Services Ltd | Other services | 2022 |
| I&I Bude Limited | Administrative & support | 2015 |
| I&M Logistics Ltd | Transport & logistics | 2014 |
| I-Link Technologies Limited | Information & communication | 2016 |
| Iamerica Limited | Administrative & support | 2013 |
| IAN Hyde Services Limited | Manufacturing | 2010 |
| Iancu Trans Ltd | Transport & logistics | 2018 |
| IB Contruction Ltd | Construction | 2022 |
| ICA Construction Ltd | Construction | 2025 |
| Icami Ltd | Real estate | 2021 |
| Icare SO Ishare CIC | Other services | 2026 |
| ICB Building Limited | Construction | 2020 |
| ICB Interiors Ltd | Construction | 2019 |
| Ickleford Mews Management Company Ltd | Households | 2017 |
| Icknield Diagnostics Ltd | Wholesale & retail | 2023 |
| Iclean Services Ltd | Administrative & support | 2018 |
| Icreate Dessert Ltd | Professional & scientific | 2018 |
| Idam Transport Ltd | Transport & logistics | 2026 |
| Idea Builders Ltd | Construction | 2018 |
| Ideal Rendering Solutions Bedford Ltd | Construction | 2026 |
| Ideal Rendering Solutions ST Albans Ltd | Construction | 2026 |
| Identity Quality Care Ltd | Health & social care | 2023 |
| Idsglas Ltd | Manufacturing | 2012 |
| Ieatwell Ltd | Hospitality | 2022 |
| Ifal Limited | Water & waste | 2021 |
| Ifam (PL) Limited | Manufacturing | 2019 |
| Ifmidi Ltd | Construction | 2021 |
| Iftar Properties Ltd | Real estate | 2025 |
| IG7 Logistics Ltd | Transport & logistics | 2021 |
| IGM Plumbing & Heating Limited | Construction | 2019 |
| IJS Cleaning Services Ltd | Administrative & support | 2021 |
| Iktf Limited | Information & communication | 2025 |
| Imaan Butchers Ltd | Wholesale & retail | 2019 |