| HD Connect Limited | Professional & scientific | 2005 |
| HD Corner Ltd | Administrative & support | 2017 |
| HD Cupping Ltd | Health & social care | 2024 |
| HD Customs Huddersfield Ltd | Wholesale & retail | 2024 |
| HD Facilities Management Limited | Administrative & support | 2025 |
| HD Hospitality Ltd | Hospitality | 2024 |
| HD Lawns Ltd | Administrative & support | 2006 |
| HD Motorcycles Ltd | Wholesale & retail | 2022 |
| HD One Acquisitions Limited | Wholesale & retail | 2024 |
| HD One Financial Limited | Wholesale & retail | 2021 |
| HD One Services Limited | Wholesale & retail | 2021 |
| HD One-Call Ltd | Construction | 2026 |
| HD Pallets Ltd | Manufacturing | 2023 |
| HD Place Ltd | Administrative & support | 2022 |
| HD Plumbing & Heating Ltd | Construction | 2021 |
| HD Primary Care Limited | Health & social care | 2021 |
| HD Prime Care Ltd | Health & social care | 2024 |
| HD Properties Solutions Limited | Construction | 2024 |
| HD Recruitment Services Limited | Administrative & support | 2025 |
| HD Renovations Yorkshire Ltd | Construction | 2024 |
| HD RENT2RENT Ltd | Real estate | 2022 |
| HD Satellite & Security Ltd | Professional & scientific | 2011 |
| HD Seamless Guttering Ltd | Construction | 2023 |
| HD Self Stores Ltd | Transport & logistics | 2025 |
| HD Smartnest Ltd | Wholesale & retail | 2024 |
| HD Sourcing and Distribution Ltd | Wholesale & retail | 2023 |
| HD Tech Solutions Ltd | Information & communication | 2026 |
| HD Transport Ltd | Transport & logistics | 2023 |
| HD Two Financial Limited | Financial services | 2021 |
| HD Tyres Ltd | Wholesale & retail | 2025 |
| HD Zero Fade Ltd | Other services | 2024 |
| HD1 Developments Limited | Construction | 1998 |
| HD1 Holdings Limited | Financial services | 2018 |
| HD1 Lets Ltd | Households | 2020 |
| HD1 Living Ltd | Real estate | 2013 |
| HD1 Pizzas Ltd | Hospitality | 2026 |
| HD1 Street Desserts Ltd | Hospitality | 2025 |
| HD1 Suiting Ltd | Wholesale & retail | 2021 |
| HD3 Cars Ltd | Wholesale & retail | 2026 |
| HD3 Fitness Centre Ltd | Arts & recreation | 2014 |
| HD3 Hair Saloon Ltd | Other services | 2026 |
| HD3 Removals and Storage Ltd | Transport & logistics | 2018 |
| HD3 Self Store Ltd | Transport & logistics | 2025 |
| HD3 Storage (Northern) Ltd | Transport & logistics | 2020 |
| HD4 Self Store Ltd | Transport & logistics | 2025 |
| HD5 Architectural Antiques Limited | Wholesale & retail | 2015 |
| HD5 Security Huddersfield Ltd | Households | 2023 |
| HD5 Self Store Ltd | Transport & logistics | 2026 |
| HD5HOMESECURITY Ltd | Construction | 2020 |
| HD7 Barber Limited | Other services | 2021 |
| HD7 Design Ltd | Professional & scientific | 2018 |
| HD7 Logs Limited | Wholesale & retail | 2020 |
| HD8 Exhibitions Limited | Manufacturing | 2017 |
| HD8 Life CIC | Professional & scientific | 2025 |
| HD8 Play Ltd | Arts & recreation | 2025 |
| HD8 Pool Limited | Arts & recreation | 2025 |
| HD8 Whoesale Limited | Wholesale & retail | 2025 |
| HD9 GAS & Hetas Solutions Limited | Construction | 2021 |
| HD9 Social Limited | Hospitality | 2025 |
| Hdcaddy Ltd | Wholesale & retail | 2026 |
| Hdfood Ltd | Hospitality | 2023 |
| HDH Consultants Limited | Information & communication | 2015 |
| Hdhr Services Ltd | Professional & scientific | 2026 |
| HDK Waste Removal Ltd | Water & waste | 2023 |
| Hdss Group Ltd | Wholesale & retail | 2016 |
| Hdtwo Ltd | Professional & scientific | 2012 |
| Hdwelding & Fabrication Ltd | Manufacturing | 2026 |
| Head Empty Studios Ltd | Information & communication | 2022 |
| Headlines (Yorkshire) Limited | Other services | 2014 |
| Headrow Dent. Limited | Health & social care | 2014 |
| Healey Dyeing Company Limited | Manufacturing | 1976 |
| Healey Express Limited | Wholesale & retail | 2020 |
| Healey House Holdings Ltd | Other services | 2017 |
| Healings Pharma Ltd | Wholesale & retail | 2025 |
| Health & Sports Product Development Ltd | Arts & recreation | 2018 |
| Health Consulting Rooms Ltd | Health & social care | 2016 |
| Health Hub Huddersfield Limited | Arts & recreation | 2024 |
| Health Innovation Ventures Ltd | Health & social care | 2024 |
| Health Private Ltd | Health & social care | 2013 |
| Health Shack Huddersfield Limited | Health & social care | 2011 |
| HEALTH310 Ltd | Public administration | 2023 |
| HEALTH365 Ltd | Health & social care | 2021 |
| Healthcare Engineering Ltd | Health & social care | 2014 |
| Healthcare Finance Limited | Financial services | 2017 |
| Healthy Foods Nutrition Clinic Ltd | Health & social care | 2025 |
| Healthy Hearts (Women's Wellbeing) CIC | Arts & recreation | 2016 |
| Healthy YOU Ltd | Health & social care | 2010 |
| Heart 4 Life Limited | Health & social care | 2021 |
| Heartwood Joinery & Building Ltd | Manufacturing | 2025 |
| Heartwood Joinery & Construction Ltd | Construction | 2025 |
| Heas (UK) Limited | Extraterritorial | 2006 |
| Heat N EAT Limited | Hospitality | 2026 |
| Heat Pump Installers UK Limited | Construction | 2017 |
| Heat Solutions WY Ltd | Construction | 2022 |
| Heath & Sons Property Management Limited | Real estate | 2020 |
| Heath Legal Holdings Limited | Financial services | 2023 |
| Heathcote Transport Ltd | Transport & logistics | 2017 |
| Heatherfield Day Nursery Limited | Health & social care | 2012 |
| Heatherington Property Ltd | Real estate | 2025 |
| Heating Care Ltd | Construction | 2008 |