| Healing Arts Cumbria CIC | Health & social care | 2025 |
| Healthy Eatout Ltd | Other services | 2020 |
| Healthy Paws Inc Ltd | Agriculture & fishing | 2025 |
| Heam Court Properties and Management Limited | Construction | 2025 |
| Heart of Hope Care Ltd | Health & social care | 2020 |
| Hearthside Companions Limited | Health & social care | 2025 |
| Hearton Powerline Surveys Ltd | Professional & scientific | 2017 |
| Heat NIC Limited | Administrative & support | 2025 |
| Heath Construction (Cumbria) Limited | Construction | 2023 |
| Heathcote Morris Resourcing Co Ltd | Professional & scientific | 2020 |
| Heather Glen Country House Limited | Hospitality | 2008 |
| Heather Glen House Ltd | Hospitality | 2020 |
| Heather Glen Limited | Real estate | 2006 |
| Heather's Cottage Limited | Hospitality | 2023 |
| Heathfield Haulage Ltd | Transport & logistics | 2016 |
| Heathlands Solar Ltd | Energy | 2020 |
| Heaton Decorating and Interiors Ltd | Construction | 2026 |
| Heaton Green (Kirkham) Management Company Limited | Real estate | 2019 |
| Heatsave Cumbria Limited | Administrative & support | 2021 |
| Heavens Deli Ltd | Hospitality | 2023 |
| Heavyspoilers Ltd | Arts & recreation | 2020 |
| Hedley's Plastering Limited | Construction | 2022 |
| Hedley's Roofing Limited | Construction | 2019 |
| Heidi Wright Recruitment Limited | Administrative & support | 2023 |
| Helda Management Limited | Professional & scientific | 2021 |
| Helen Arthur Consulting Limited | Professional & scientific | 2012 |
| Helen Whitaker Ltd | Real estate | 2025 |
| Helix Facilities Management Limited | Administrative & support | 2022 |
| Hellflow Studios Ltd | Information & communication | 2026 |
| Hemblesgate Management Limited | Households | 2007 |
| Hemiko Limited | Professional & scientific | 2012 |
| Henderson Farming Limited | Extraterritorial | 2018 |
| Henderson Joinery & Construction Limited | Construction | 2019 |
| Henry Boyle (London) Limited | Real estate | 2021 |
| Henry Food Carlisle Ltd | Hospitality | 2026 |
| Henshaw Developments Limited | Real estate | 2005 |
| Hensmon Property Ltd | Real estate | 2012 |
| Herd by Many Limited | Professional & scientific | 2016 |
| Heritage & Castle Limited | Wholesale & retail | 2021 |
| Heritage 18 Community Interest Company | Professional & scientific | 2022 |
| Heritage Clocks Limited | Manufacturing | 1994 |
| Heritage Fields and Station Fields (Tanfield LEA) Management Company Limited | Real estate | 2024 |
| Heritage Pottery Company Limited | Manufacturing | 2018 |
| Heritage Roofing Ltd | Construction | 2025 |
| Hernandez & Salas Transport Ltd | Wholesale & retail | 2016 |
| Hero Lets Ltd | Real estate | 2015 |
| Hersham Stanwell Limited | Professional & scientific | 2009 |
| Hertfordshire Equine Assisted Learning Limited | Education | 2010 |
| Hesket Demain Limited | Agriculture & fishing | 2009 |
| Hesket Kennels & Cattery Ltd | Agriculture & fishing | 2022 |
| Hesket Real Estates Ltd | Real estate | 2023 |
| Hesta Digital Ltd | Extraterritorial | 2021 |
| Hetherington Electrical Limited | Construction | 2011 |
| Hetherington Homes (Cumbria) Ltd | Real estate | 2017 |
| Hethersgill ATV Services Limited | Extraterritorial | 2017 |
| Hethersgill Vintage Club | Other services | 2007 |
| Hewstown Farm Limited | Agriculture & fishing | 2020 |
| HEY Commercial Services Limited | Wholesale & retail | 2025 |
| HF Contract Interiors Ltd | Manufacturing | 2023 |
| HG Associates Ltd | Professional & scientific | 2023 |
| HGF Medical Services Limited | Health & social care | 2015 |
| HHJ Estates Ltd | Real estate | 2023 |
| High Garth Meadows Residents' Association Limited | Households | 2010 |
| High Peak Radio Limited | Information & communication | 2000 |
| High Q Diagnostic Services Limited | Health & social care | 2018 |
| High Spec Joinery Ltd | Construction | 2025 |
| High Street Skipton Limited | Real estate | 2019 |
| High Tech DEV Limited | Information & communication | 2012 |
| High Top Roofing and Building Ltd | Construction | 2026 |
| High Tower Beauty Ltd | Other services | 2024 |
| High UP Developments Ltd | Real estate | 2026 |
| High Wood (Lancaster) Management Company Limited | Households | 2013 |
| Highberries Leisure Limited | Hospitality | 2004 |
| Highconsult Limited | Real estate | 2006 |
| Highfields (Dunston Hill) Management Company Limited | Real estate | 2022 |
| Highliving Ltd | Wholesale & retail | 2025 |
| Highstyle Valeting Ltd | Wholesale & retail | 2022 |
| Hike Inns Ltd | Extraterritorial | 2014 |
| Hilary Bell Limited | Professional & scientific | 2002 |
| Hilary Mews Management Company Limited | Households | 2006 |
| Hillcrest (Cumbria) Limited | Households | 1987 |
| Hillflock Limited | Professional & scientific | 1988 |
| Hillhead Joinery Limited | Construction | 2014 |
| Hillside Dairy Limited | Agriculture & fishing | 2000 |
| Hillside Rise Management Company Limited | Households | 2025 |
| HIO Events Limited | Administrative & support | 2020 |
| HIRE100 Ltd | Transport & logistics | 2013 |
| Hive Global Ltd | Manufacturing | 2021 |
| Hjmd Limited | Extraterritorial | 2019 |
| HLF Property Ltd | Hospitality | 2026 |
| HME Cumbria Limited | Agriculture & fishing | 2023 |
| HN Skin Distribution Ltd | Wholesale & retail | 2025 |
| Hockley Developments (Woodborough Road) Limited | Construction | 2019 |
| Hodgson Access Ltd | Construction | 2025 |
| Hodgson's News Limited | Wholesale & retail | 2013 |
| Hodgson’S Ltd | Transport & logistics | 2023 |
| HOL Creative Ltd. | Professional & scientific | 2024 |
| Holcroft Gardens (Culcheth) Management Company Limited | Real estate | 2026 |
| Holistic Academy Carlisle Ltd. | Education | 2015 |
| Hollows Farm Limited | Hospitality | 2024 |