| Hersh Limited | Hospitality | 2024 |
| Herz Valves UK Limited | Wholesale & retail | 1967 |
| Heslington Developments Limited | Real estate | 2017 |
| Hestia Radio Community Interest Company | Information & communication | 2014 |
| Hestia Ventures Ltd | Wholesale & retail | 2021 |
| Hewett Minshall Ltd | Real estate | 2026 |
| Hextoro Limited | Professional & scientific | 2019 |
| Heys and Harris Holdings Limited | Financial services | 2022 |
| Heys Farms Limited | Agriculture & fishing | 2019 |
| Hftn Shop (H&V) Ltd | Wholesale & retail | 2022 |
| Hftn Shop Limited | Other services | 2010 |
| HGS Developments Ltd | Construction | 2003 |
| Hhak Limited | Real estate | 2020 |
| HHF Investments Ltd | Real estate | 2021 |
| HI Pharma Services Ltd | Wholesale & retail | 2025 |
| HI Tech Phones Ltd | Wholesale & retail | 2019 |
| Hi-Spec Wallcoatings Ltd | Construction | 2015 |
| Hi-Tec Modems Limited | | 1989 |
| HI5FIVE Limited | Information & communication | 2021 |
| Hicks Martial Art UK Equipment Limited | Wholesale & retail | 2018 |
| Hicks Property Investments Ltd | Real estate | 2016 |
| Hictij Limited | Information & communication | 2023 |
| Hidden B Limited | Other services | 2016 |
| Hidden Trove Empowerment Initiative Ltd | Other services | 2025 |
| Hidecom Ltd | Information & communication | 2025 |
| Higgsy's & Kris Ltd | Hospitality | 2026 |
| Higgsy's Ltd | Hospitality | 2022 |
| High - Tech Limited | Construction | 1982 |
| High Class Services Ltd | Professional & scientific | 2004 |
| High Education and Qualification Academy Ltd | Education | 2023 |
| High Ground Services Limited | Water & waste | 2020 |
| High Hurst Limited | Real estate | 2016 |
| High Moor View Winkleigh (Phase 2) Management Company Limited | Households | 2025 |
| High Moor View Winkleigh Management Company Limited | Households | 2022 |
| High Performance Automotive Limited | Wholesale & retail | 2024 |
| High Street Car Care Ltd | Wholesale & retail | 2024 |
| High Street Oriental Limited | Hospitality | 2025 |
| High Wash Sports (Whittlesey) Limited | Arts & recreation | 1965 |
| High Wycombe (Woodcock) Residents Company Limited | Households | 2015 |
| Highbank Gardens Management Company Limited | Households | 2021 |
| Highfields Coates Management Company Limited | Real estate | 2014 |
| Highfields Plumbing & Heating Ltd | Construction | 2019 |
| Highgate Properties Limited | Real estate | 1995 |
| Highgrade Security Solutions Limited | Professional & scientific | 2008 |
| Highland Install Ltd | Construction | 2021 |
| Highline Photography Ltd | Professional & scientific | 2025 |
| Highlink Logistics Limited | Transport & logistics | 2025 |
| Highly Progressive Property Limited | Wholesale & retail | 2022 |
| Hightrees Interim and Consulting Services Ltd | Professional & scientific | 2024 |
| Highway 61 Limited | Information & communication | 2020 |
| Highway 86 Transport Ltd | Transport & logistics | 2014 |
| Highwood Farms Limited | Real estate | 1997 |
| Hiig Holdings Ltd | Professional & scientific | 2024 |
| Hiki Ltd | Transport & logistics | 2023 |
| Hilife Arts Training Centre Community Interest Company | Information & communication | 2024 |
| Hilife Designer Brands Limited | Information & communication | 2017 |
| Hilife Fashion Limited | Information & communication | 2019 |
| Hilife Group Limited | Information & communication | 2019 |
| Hilife Limited | Information & communication | 2025 |
| Hilife Media Group Ltd | Manufacturing | 2017 |
| Hilife Music Group Limited | Information & communication | 2015 |
| Hilife Music Limited | Information & communication | 2014 |
| Hilife Recordings Limited | Information & communication | 2020 |
| Hilife Sport Fitness Limited | Arts & recreation | 2025 |
| Hilife Sport Group Limited | Arts & recreation | 2019 |
| Hill Arts Ltd | Arts & recreation | 2025 |
| Hill Home Survey Ltd | Professional & scientific | 2024 |
| Hill Homes and Properties Ltd | Real estate | 2022 |
| Hillberry Kitchens Ltd | Wholesale & retail | 2017 |
| Hilljet Construction Supply Limited | Wholesale & retail | 2016 |
| Hilljet G8 Developments Limited | Construction | 2018 |
| Hilljet G8 Homes Limited | Construction | 2018 |
| Hilljet Investments Peterborough Limited | Real estate | 2017 |
| Hills Accountants (Oakham) Limited | Professional & scientific | 2018 |
| Hills Accountants Limited | Professional & scientific | 2012 |
| Hills Development Group Ltd | Construction | 2023 |
| Hills of Spalding Limited | Real estate | 1943 |
| Hiltek Ltd | Construction | 2015 |
| Hilton Housing Group Ltd | Real estate | 2023 |
| Hilton Motor Group Ltd | Wholesale & retail | 2023 |
| Hiltons Distribution Limited | Transport & logistics | 2011 |
| Hiltons MOT Centre Limited | Wholesale & retail | 2023 |
| Himalayan Collection Limited | Wholesale & retail | 2012 |
| Himalayan Express Peterborough Limited | Transport & logistics | 2022 |
| Himalayan Suvai Limited | Hospitality | 2026 |
| Hinca Ltd | Transport & logistics | 2025 |
| Hinchcliffe Electrical Ltd | Wholesale & retail | 2025 |
| Hinchingbrooke Business Park Management Company Limited | Real estate | 2008 |
| Hindin & Black Limited | Real estate | 1962 |
| Hinds Mortgage Solutions Limited | Financial services | 2024 |
| Hinnah Limited | Wholesale & retail | 2024 |
| Hinson Investments Limited | Real estate | 2024 |
| Hiperactive.Net Ltd | Administrative & support | 1997 |
| Hire Harvey Ltd | Professional & scientific | 2019 |
| Hiszpan Ltd | Wholesale & retail | 2011 |
| HIT Academy Music Ltd | Arts & recreation | 2026 |
| Hitech Rooflights Limited | Administrative & support | 2022 |
| Hive Services GRP Limited | Financial services | 2021 |
| Hive Waste and Recycling Limited | Water & waste | 2010 |
| HIWAD123 Ltd | Hospitality | 2023 |