| Heddle Design and Build Limited | Construction | 2021 |
| Heightec Limited | Professional & scientific | 2000 |
| Help ME NOW Ltd | Other services | 2025 |
| Helsfell Hall Management Company Limited | Households | 2004 |
| Helsington & Brigsteer Village Hall | Arts & recreation | 2009 |
| Helsington Developments Limited | Construction | 2018 |
| Helsington Engineering Services Ltd | Professional & scientific | 2018 |
| Helsington Laithes Management Company Limited | Households | 1997 |
| Henry Jackson & Co. (Motor Engineers) Limited | Wholesale & retail | 1944 |
| Henry Thomas Properties Limited | Construction | 2004 |
| Herbivorous Gormandizer Ltd | Hospitality | 2023 |
| Herdwick Communications Limited | Professional & scientific | 2021 |
| Herdwick Cottages Ltd | Hospitality | 2018 |
| Herdwick Group Limited | Real estate | 2023 |
| Herdy Homes Limited | Real estate | 2025 |
| Heron Hill Spare Ground Limited | Households | 1997 |
| HEY Chimp Ltd | Wholesale & retail | 2018 |
| Heywood-Macdonald Accountancy Services Ltd | Administrative & support | 2021 |
| High House Bars Ltd | Hospitality | 2023 |
| High Knott Management Company Limited | Administrative & support | 2015 |
| High Park Management Company Limited | Households | 1998 |
| High School House Limited | Households | 2017 |
| High Tenterfell Management Company Limited | Households | 2018 |
| Highbrook Homes (Kirkstone) Limited | Construction | 2015 |
| Highbrook Homes Limited | Construction | 2007 |
| Highgate Carpets Ltd | Construction | 2020 |
| Hill AI Limited | Information & communication | 2025 |
| Hill Crest (2004) Management Company Limited | Households | 2004 |
| Hilltop Lodges Limited | Hospitality | 2006 |
| Hindsight Planning Solutions Limited | Public administration | 2020 |
| Hiraeth Mixed Media Limited | Information & communication | 2001 |
| Hitas Formulations Ltd | Agriculture & fishing | 2020 |
| Hlaupa Limited | Information & communication | 2023 |
| HLM Building and Adaptations Limited | Construction | 2013 |
| HM Architecture (NW) LLP | | 2021 |
| HN Nails Supply Ltd | Other services | 2023 |
| Hofn Events Ltd | Hospitality | 2017 |
| Holden Letting Ltd | Hospitality | 2025 |
| Hole in Wall Ltd | Hospitality | 2015 |
| Holiday Care Limited | Health & social care | 2004 |
| Hollingsworth & Vose Air Filtration Limited | Manufacturing | 2000 |
| Holly Wilson Health and Fitness Ltd | Education | 2024 |
| Holme Haulage Limited | Transport & logistics | 2021 |
| Holme House Farm Limited | Real estate | 2019 |
| Holme Park Management Company Limited | Real estate | 2008 |
| Holmescales Equestrian Limited | Other services | 2012 |
| Home Delivery Carpets Limited | Wholesale & retail | 2005 |
| Home Designs (North West) Limited | Wholesale & retail | 2003 |
| Home Energy Doctor Limited | Administrative & support | 2022 |
| Homeground Coffee & Kitchen Ltd | Financial services | 2025 |
| Honister Energy Limited | Energy | 2015 |
| Hops and Giggles Limited | Hospitality | 2025 |
| Hopwoods (NW) Limited | Wholesale & retail | 2025 |
| Hospitality Audit Services Ltd | Professional & scientific | 2012 |
| House Fitness Ltd | Arts & recreation | 2021 |
| House of Hare (Kendal) Limited | Other services | 2019 |
| House of Soleil Ltd | Arts & recreation | 2025 |
| Housekeeping Club Limited | Administrative & support | 2021 |
| HOW to BE Better Ltd | Wholesale & retail | 2025 |
| Howard Bennett Limited | Construction | 2005 |
| Howe Projects Limited | Construction | 2003 |
| Howson Interiors Limited | Extraterritorial | 2005 |
| HRJ Properties Limited | Construction | 1998 |
| Hsaea Lyne Ltd | Wholesale & retail | 2025 |
| Hscs Limited | Transport & logistics | 2006 |
| Huck Nicholson Limited | Construction | 2021 |
| Huff and Puff Cumbria Limited | Wholesale & retail | 2025 |
| Hugh Miller Art Limited | Arts & recreation | 2014 |
| Hulme Cleaning Services Ltd | Administrative & support | 2024 |
| Hulme Group Holdings Ltd | Financial services | 2025 |
| Humanise Festival Ltd | Arts & recreation | 2023 |
| Humanitas Recruitment Solutions Ltd | Administrative & support | 2023 |
| Humbug Homes Limited | Real estate | 2023 |
| Hundhowe Hospitality Ltd | Hospitality | 2020 |
| Hutton Park New Hutton Management Co Ltd | Households | 1999 |
| Hynes Illingworth Limited | Real estate | 2009 |
| Hyning Estate Management Company Limited | Households | 1976 |
| I D Performance Ltd | Wholesale & retail | 2022 |
| I Matter Training Ltd | Education | 2011 |
| IAN Atkinson Ltd | Construction | 2014 |
| IAN F Nicholson Ltd | Construction | 2008 |
| IAN Palmer Architects Limited | Professional & scientific | 2014 |
| Ibex Internet Limited | Information & communication | 2004 |
| IBF Property Limited | Construction | 2011 |
| Ibis Intergrid Limited | Manufacturing | 1983 |
| Idrop Couriers Ltd | Transport & logistics | 2025 |
| Ignitek Ltd | Wholesale & retail | 2024 |
| Impact Marine Limited | Manufacturing | 2015 |
| IN ORE Design Limited | Professional & scientific | 2022 |
| Independent Coaching and Consultancy Ltd. | Administrative & support | 2011 |
| Indie Craft Beer Ltd | Wholesale & retail | 2017 |
| Infinitus Electrical Ltd | Construction | 2011 |
| Inglefield Plants Limited | Wholesale & retail | 2003 |
| Inglewood Cards Limited | Wholesale & retail | 2012 |
| INNOV-8 Management Limited | Information & communication | 2025 |
| Inspired Meadows Kendal Ltd | Other services | 2023 |
| Inspired Meadows Limited | Other services | 2011 |
| Interior Health Design Limited | Education | 2016 |
| International Everything Ltd | Wholesale & retail | 2025 |
| International School of Mountaineering Limited | Administrative & support | 2005 |