| HB Fibre Ltd | Information & communication | 2018 |
| HB Fight Promotions Limited | Arts & recreation | 2023 |
| HBR Ryland Limited | Real estate | 2021 |
| HBS Proactive Solutions Limited | Construction | 2018 |
| Hcrc London LLP | | 2022 |
| HDK Scaffolding Ltd | Construction | 2020 |
| HDR Media Ltd | Information & communication | 2025 |
| Hdsn Records Limited | Information & communication | 2025 |
| Headstart Care Group Limited | Health & social care | 2021 |
| Health Estates Compliance Limited | Other services | 2024 |
| Health for Women Ltd | Health & social care | 2020 |
| HEALTHYAT100 Limited | Health & social care | 2024 |
| Heatherbie Limited | Wholesale & retail | 2016 |
| Hedgehog Development ( Architectural Services) Ltd | Professional & scientific | 2015 |
| Heidi's Virtual Assistant Limited | Administrative & support | 2021 |
| Hellfire Creative Limited | Arts & recreation | 2021 |
| Helloheating Ltd | Construction | 2025 |
| Hemley House Garage Ltd | Real estate | 2024 |
| Hemley House Management Limited | Other services | 2002 |
| Henderson SPV Ltd | Real estate | 2023 |
| Hendricks Estate Agents Ltd | Real estate | 2025 |
| Henfred Studio Limited | Information & communication | 2024 |
| Henry Slee Consulting Limited | Professional & scientific | 2020 |
| Henry's Corner of Happiness Ltd | Hospitality | 2020 |
| Heritage Holdings (Essex) Ltd | Extraterritorial | 2017 |
| Heritage Horse Drawn Carriage Masters Ltd | Other services | 2014 |
| Heritage Kitchen and Bar Limited | Wholesale & retail | 2019 |
| Heritage Vehicle Management Limited | Transport & logistics | 2018 |
| Heritage-Icare Limited | Health & social care | 2019 |
| Hermetic Holdings Ltd | Financial services | 2026 |
| Hernes Holdings Limited | Financial services | 2021 |
| Hernleigh Ltd | Professional & scientific | 2025 |
| Heron Enterprises Limited | Administrative & support | 1946 |
| Heronsgate Joinery Ltd | Manufacturing | 1955 |
| Herpetological UK Limited | Agriculture & fishing | 2008 |
| Hflt Construction & Consultants Ltd | Construction | 2025 |
| HFZ UK Ltd | Wholesale & retail | 2023 |
| HG Software Ltd | Information & communication | 2022 |
| HGC Plumbing Ltd | Construction | 2019 |
| HGS Specialist Services Ltd | Construction | 2019 |
| HGW Plant Hire Limited | Other services | 2006 |
| HI Gain Investments Limited | Financial services | 2010 |
| HI Gain Limited | Professional & scientific | 2008 |
| Hiatus Stays Ltd | Real estate | 2021 |
| Hidden Talents Education Limited | Arts & recreation | 2021 |
| Highcliff Peck Limited | Financial services | 2015 |
| Highcliff RTM Company Limited | Professional & scientific | 2010 |
| Highfield Events Limited | Other services | 2018 |
| Highlands Surgery (Property) Limited | Real estate | 2020 |
| Highlift Scaffolding Limited | Construction | 2020 |
| Highside Consulting Limited | Professional & scientific | 2025 |
| Highwell Gardens Management Company Limited | Professional & scientific | 2016 |
| Hill Capital Ventures Limited | Professional & scientific | 2024 |
| Hilliard & French Estates Ltd | Real estate | 2026 |
| Hilliard Construction Ltd | Construction | 2022 |
| Hills Pharmacy Limited | Wholesale & retail | 2022 |
| Hills Rispar Limited | Real estate | 2016 |
| Hillside Pinnacle Foods (UK) Limited | Manufacturing | 2025 |
| Hillside Property Enterprises Limited | Real estate | 2019 |
| Hinkcroft Transport Limited | Water & waste | 1977 |
| Hinter Electrics Ltd | Construction | 2020 |
| Hippos Exoskeleton Limited | Manufacturing | 2024 |
| Hirepro Holdings UK Ltd | Financial services | 2021 |
| Histonwood Holdings Limited | Financial services | 2016 |
| Histonwood Investments Limited | Construction | 2016 |
| Histonwood Limited | Construction | 1983 |
| Hivedome Consultancy Services Ltd | Information & communication | 2013 |
| HJT Valeting Ltd | Administrative & support | 2025 |
| HMW Media Ltd | Information & communication | 2022 |
| Hnic Limited | Financial services | 2018 |
| Hoarding Fencing & Decking Ltd | Construction | 2009 |
| Hodges Financial Consultancy Limited | Financial services | 2017 |
| Holding Consultancy Limited | Other services | 2017 |
| Holehaven Developments Limited | Administrative & support | 2004 |
| Holiday Helper Ltd | Administrative & support | 2019 |
| Holistic Healthcare Southend-On-Sea Ltd | Health & social care | 2023 |
| Hollie Durrance Consulting Ltd | Professional & scientific | 2019 |
| Holligoggins Limited | Professional & scientific | 2015 |
| Hollington Properties Limited | Real estate | 2018 |
| Hollington Properties Management Limited | Real estate | 2018 |
| Hollington Property Group Limited | Real estate | 2022 |
| Hollington Real Estates Limited | Real estate | 2019 |
| Hollygrove Properties Limited | Construction | 2021 |
| HOM Hospitality Limited | Hospitality | 2025 |
| Home for Life Community Housing CIC | Real estate | 2026 |
| Home for Life Group Ltd | Construction | 2026 |
| Home Freedom Limited | Construction | 2018 |
| Home Group Holdings International Ltd | Professional & scientific | 2019 |
| Home Hype Limited | Construction | 2024 |
| Home Sweet Home Caring Services Ltd | Health & social care | 2019 |
| Homecraft Contracts Limited | Construction | 1999 |
| Homefields Property Ltd | Real estate | 2022 |
| Homely Spirit Ltd | Real estate | 2024 |
| Homeslice Cannon Street Limited | Hospitality | 2016 |
| Homeslice Holdings Limited | Financial services | 2014 |
| Homeslice Limited | Hospitality | 2012 |
| Homeslice Services Limited | Professional & scientific | 2015 |
| Homestead Properties Limited | Real estate | 2000 |
| Homesteads Cleaning Ltd | Administrative & support | 2024 |
| Homeworks Properties Ltd | Real estate | 2025 |