| Higher Rhythm Limited | Information & communication | 2007 |
| Highfield Awarding Body for Compliance Limited | Education | 2008 |
| Highfield Cost Management Ltd | Professional & scientific | 2016 |
| Highfield Elearning Limited | Education | 2010 |
| Highfield Hall Care Limited | Health & social care | 2018 |
| Highfield Products Limited | Education | 1999 |
| Highfield Recruit and Assessment Limited | Public administration | 2018 |
| Highfields Hawcs CIC | Arts & recreation | 2026 |
| Highland Carbon Ltd | Agriculture & fishing | 2017 |
| Highland Living Limited | Real estate | 2019 |
| Highlight Building Designs Ltd | Information & communication | 2025 |
| Highpower Systems UK Limited | Manufacturing | 2016 |
| Hightop Roofing Solutions Limited | Construction | 2025 |
| Highway Management Resurfacing Ltd | Construction | 2015 |
| Highways Personnel Limited | Construction | 2023 |
| Highwood Canine Hydrotherapy Limited | Other services | 2011 |
| Highwood Services Limited | Administrative & support | 2015 |
| Hilda Construction & Facilty Managment Ltd | Construction | 2024 |
| Hilda Decoration Ltd | Construction | 2026 |
| Hilda Property Investments Ltd | Real estate | 2025 |
| Hilife Records (Publishing) Limited | Information & communication | 2004 |
| Hill and Wright Ltd | Agriculture & fishing | 2026 |
| Hill House School Limited | Education | 1967 |
| Hill Physiotherapy Practice Limited | Health & social care | 2010 |
| Hillblake International Limited | Wholesale & retail | 2011 |
| Hillbrook Works Limited | Construction | 2026 |
| Hillcrest Contracting Ltd | Construction | 2025 |
| Hillrail Ltd | Construction | 2025 |
| Hills Jones Trading Ltd | Financial services | 2024 |
| Hills Mansfield Limited | Construction | 2017 |
| Hillside Electrical (Northern) Limited | Manufacturing | 2018 |
| Hilltop Dining Limited | Hospitality | 2025 |
| Hillyer Transport Limited | Transport & logistics | 2018 |
| Hiltai Properties Limited | Real estate | 2025 |
| Hilton Mortgage Solutions Limited | Other services | 2018 |
| Hinchlifferail Ltd | Construction | 2018 |
| Hindle Fold Developments Limited | Real estate | 2002 |
| HIP Europe Management Ltd | Financial services | 2008 |
| Hipwell Motor Services Limited | Wholesale & retail | 2009 |
| Hire and Getaway Limited | Hospitality | 2021 |
| Hire-Tec Limited | Administrative & support | 2024 |
| Hirst Shaw Electrical Ltd | Construction | 2026 |
| HIS & Hers Home Improvements Ltd | Construction | 2018 |
| HIS Tiling Ltd | Construction | 2026 |
| Hiskdar Pizza Limited | Hospitality | 2025 |
| Historic Building Restoration Ltd | Construction | 2015 |
| Hiwa Holding Limited | Information & communication | 2021 |
| Hiwatt Electronics Limited | Manufacturing | 2016 |
| HJM Cost Management Ltd | Professional & scientific | 2025 |
| HJM Ltd | Hospitality | 2025 |
| HK Food Traders Ltd | Hospitality | 2025 |
| HK Maintenance Limited | Manufacturing | 2011 |
| HK Properties Limited | Real estate | 2002 |
| Hk.Santorini Limited | Transport & logistics | 2022 |
| Hkcs Limited | Professional & scientific | 2008 |
| HKJ Properties Ltd | Real estate | 2018 |
| HLC Doncaster Ltd | Other services | 2026 |
| HLH Food Direct Ltd | Hospitality | 2026 |
| HLM Coaching and Training Ltd | Professional & scientific | 2023 |
| HMB Investments Limited | Real estate | 2013 |
| Hmbsalon Ltd | Other services | 2019 |
| HMC Facilities Limited | Construction | 2001 |
| HMG Car and Commercial Ltd | Wholesale & retail | 2025 |
| HMJ Opus Consultants Ltd | Information & communication | 2016 |
| HMS Estate Limited | Real estate | 2024 |
| HMS Performance Ltd | Wholesale & retail | 2024 |
| HMS Strategic Properties Limited | Real estate | 2025 |
| HN Dellentechnik Holding Limited | Financial services | 2026 |
| Hneales Ltd | Wholesale & retail | 2025 |
| HNW Associates Ltd | Wholesale & retail | 2022 |
| Hobpen Homes Ltd | Households | 2025 |
| HOC Direct Property Limited | Administrative & support | 2023 |
| Hodge Separators Limited | Extraterritorial | 2006 |
| Hodge Trustees Limited | Extraterritorial | 1964 |
| Hodges Court Management Company Limited | Households | 2021 |
| Hodgson Finance Ltd | Professional & scientific | 2012 |
| Hogandsons Ltd | Wholesale & retail | 2020 |
| Hoglets Daycare Limited | Health & social care | 2024 |
| Hoglets Wrap Around Ltd | Education | 2023 |
| HOI Choi Asian Restaurant Ltd | Hospitality | 2026 |
| Holaker Properties Limited | Real estate | 2024 |
| Holder Engineering Ltd | Professional & scientific | 2022 |
| Holdham Wholesale Services Limited | Wholesale & retail | 2023 |
| Holding a Rose Limited | Administrative & support | 2022 |
| Holistic Care 4U Ltd | Health & social care | 2018 |
| Holistic Care Ldmh Group Limited | Health & social care | 2018 |
| Holistic IT Ltd | Information & communication | 2003 |
| Holistic Spaces Community CIC | Health & social care | 2026 |
| Holland's Amusements Limited | Arts & recreation | 2019 |
| Holland’S LAD and Lady Plumbing and Heating Ltd | Professional & scientific | 2020 |
| Hollies Bar Ltd | Hospitality | 2024 |
| Hollingwood Care Home Limited | Health & social care | 2017 |
| Hollingworth of Yorkshire Ltd | Real estate | 2023 |
| Holloway Studios Ltd | Information & communication | 2025 |
| Hollowgate Farms Limited | Agriculture & fishing | 1998 |
| Hollowtree Supply Ltd | Extraterritorial | 2026 |
| Holly Abell Permanent Cosmetics Ltd | Other services | 2015 |
| Holly Grove Childcare Limited | Health & social care | 2025 |
| Holly House Nursery Doncaster Limited | Health & social care | 2016 |
| Hollybush Gardens Limited | Arts & recreation | 2013 |