| Grizzly Remedies Limited | Wholesale & retail | 2022 |
| GRJ Engineering Ltd | Professional & scientific | 2024 |
| Groat Veterinary Ltd | Professional & scientific | 2021 |
| Grow Well West Cumbria Community Interest Company | Agriculture & fishing | 2018 |
| GWH Instrument Services Limited | Professional & scientific | 2025 |
| H & J Graham Ltd | Wholesale & retail | 2016 |
| H L Food Consultancy Limited | Professional & scientific | 2012 |
| Hails Beauty Studio Limited | Other services | 2023 |
| Hair Again Limited | Other services | 2003 |
| Halal Group Ltd | Information & communication | 2022 |
| Halo Locums Limited | Professional & scientific | 2010 |
| Hamilton Plastic Surgery Ltd | Health & social care | 2013 |
| Harper Longland Property Limited | Real estate | 2022 |
| Harrison Carrock Limited | Real estate | 2001 |
| Harrison Land and Property Developments Limited | Construction | 2004 |
| Harrison Network Limited | Education | 2017 |
| Hayton Organisational Consulting Ltd | Information & communication | 2018 |
| Heart of the Home Interiors Limited | Professional & scientific | 2018 |
| Heart of the Lake District Interiors & Exteriors Limited | Construction | 2021 |
| Helios Digital Marketing Limited | Information & communication | 2024 |
| Hickling Housing Ltd | Real estate | 2026 |
| High Dyke Holidays Limited | Hospitality | 2021 |
| High Sand Properties Limited | Households | 2017 |
| High Tarn Enterprise Limited | Real estate | 2024 |
| Higham Hall College | Education | 2007 |
| Highfield (Cumbria) Limited | Construction | 2001 |
| Hilaria Margaret Limited | Other services | 2022 |
| Hinterlandes Ltd | Hospitality | 2019 |
| HOD09 Ltd | Professional & scientific | 2023 |
| Hodgson Enterprises Limited | Manufacturing | 2013 |
| Hoffmann Industries Limited | Professional & scientific | 2013 |
| Hollins Jubilee Engineering Limited | Professional & scientific | 2018 |
| Hollinshead Ltd | Hospitality | 2022 |
| Honey B Control Systems Limited | Other services | 2014 |
| Hopegillmedia Ltd | Information & communication | 2022 |
| Horizon Management Projects Limited | Administrative & support | 2021 |
| Horsman Court Limited | Households | 1988 |
| House of Beauty (Cockermouth) Limited | Other services | 2017 |
| House of Swain Beauty Ltd | Other services | 2019 |
| House of Swain Education Limited | Other services | 2023 |
| House of Swain Hairdressing Ltd | Other services | 2019 |
| Howgill Court Residents Management Company Limited | Households | 2006 |
| Howling Wolf Bakery Ltd | Hospitality | 2023 |
| HR Properties Cumbria Limited | Real estate | 2021 |
| Hundith Hill Hotel Limited | Hospitality | 2002 |
| Hunter Whins Limited | Agriculture & fishing | 2021 |
| Hvac Silverwood Solutions Ltd | Administrative & support | 2021 |
| I & B Builders Ltd | Construction | 2013 |
| I C Travel Limited | Transport & logistics | 2018 |
| I DO Bridal Limited | Wholesale & retail | 2003 |
| I Park Holdings Limited | Professional & scientific | 2021 |
| I Park Services Limited | Real estate | 2018 |
| I Park Smart Limited | Administrative & support | 2015 |
| I T & a Relph Limited | Construction | 2009 |
| Iain Abernethy Ltd | Education | 2012 |
| Iguide Adventure Limited | Professional & scientific | 2015 |
| Images (Workington) Limited | Other services | 2015 |
| Immortal Machines Limited | Professional & scientific | 2025 |
| Independent Film Accord Ltd | Information & communication | 2023 |
| Indigo Lounge Limited | Professional & scientific | 2014 |
| Inglenook Caravans Ltd | Wholesale & retail | 2013 |
| Insightful Health Ltd | Health & social care | 2022 |
| IOG Quality Consulting Limited | Professional & scientific | 2024 |
| IS Property Management Limited | Households | 2013 |
| IW NET Zero Ltd | Professional & scientific | 2024 |
| J & E Enterprises Limited | Hospitality | 2003 |
| J & G Taylor Farms Limited | Agriculture & fishing | 2020 |
| J & L (Cumbria) Limited | Construction | 2016 |
| J a LEE Limited | Administrative & support | 2002 |
| J Harper Electrical Limited | Construction | 2015 |
| J J Moore Limited | Wholesale & retail | 1998 |
| J Murphy Ltd | Professional & scientific | 2023 |
| J Murphy Security & Recruitment Limited | Administrative & support | 2024 |
| J R W Electrical Services Limited | Construction | 2007 |
| J Ritson Limited | Construction | 2002 |
| J S Clarke Consulting Limited | Professional & scientific | 2017 |
| J S Coltman Ltd | Real estate | 2024 |
| J T Heating Services Limited | Construction | 2008 |
| J W Storage Cockermouth Limited | Transport & logistics | 2017 |
| J Wheeler Property Ltd | Real estate | 2021 |
| J.A. Cannan Limited | Construction | 2006 |
| J.A. LEE Window & General Cleaning Contractors Limited | Administrative & support | 2001 |
| J.M.H. Motor Services Limited | Wholesale & retail | 2002 |
| JA Consultants Worldwide Ltd | Professional & scientific | 2024 |
| JAB Project Service Ltd | Administrative & support | 2013 |
| Jacardio Limited | Health & social care | 2021 |
| Jack Watson Building Services Ltd | Construction | 2024 |
| James Frayne Ltd | Financial services | 2023 |
| JDT Electrical Design Limited | Other services | 2013 |
| Jedam Design Services Limited | Professional & scientific | 2011 |
| Jennings Brewery Limited | Manufacturing | 2020 |
| Jeremy Fisher Properties Limited | Construction | 2006 |
| JIU Jitsu Abingdon Ltd | Education | 2026 |
| JJC Projects Limited | Professional & scientific | 2017 |
| JKD Kali Abingdon Ltd | Education | 2026 |
| JKS Abingdon Ltd | Education | 2026 |
| Joanne Marshall A.C.A. Ltd | Professional & scientific | 2025 |
| JOE Elliot Limited | Agriculture & fishing | 2002 |
| John Dalton Management Company Ltd | Real estate | 2017 |
| John's Place Limited | Hospitality | 2024 |