| Game Plan 360 Ltd | Construction | 2018 |
| GB Crossley Surveyors Ltd | Other services | 2025 |
| GB Ennis Partnership Limited | Construction | 2024 |
| Geel Ventures Ltd | Information & communication | 2026 |
| Genius Penguin Limited | Professional & scientific | 2012 |
| GG Corporation Ltd | Manufacturing | 2026 |
| GH Consultants Cumbria Limited | Other services | 2025 |
| Gibson Cumbria Limited | Construction | 2015 |
| Gill Bros Decking Design Limited | Wholesale & retail | 2017 |
| Glenn MCK Properties Ltd | Real estate | 2023 |
| Glgould Engineering Ltd | Construction | 2024 |
| GM4 Engineering Ltd | Construction | 2021 |
| Golden Dragon Takeaway Ltd | Hospitality | 2022 |
| GR Properties Cumbria Ltd | Real estate | 2025 |
| GR Property Developers Limited | Real estate | 2024 |
| Grace Cook @ Salty Global Ltd | Professional & scientific | 2025 |
| Graham Stevens Opticians Ltd | Wholesale & retail | 2007 |
| Greenbank Pensioners & Residents Social Club CIC | Hospitality | 2019 |
| Greystoke Developments Limited | Construction | 2025 |
| GT Operational Engineering Ltd | Professional & scientific | 2014 |
| HA Atkinson Limited | Hospitality | 2026 |
| Haig Motors Ltd | Wholesale & retail | 2018 |
| Haig PIT Bakehouse Ltd | Hospitality | 2026 |
| Hair Supplies Ltd | Other services | 2012 |
| Hamr Ltd | Information & communication | 2026 |
| Hannah Developments (Cumbria) Limited | Real estate | 2024 |
| Hantom Developments Ltd. | Real estate | 1994 |
| Harbourside Development Management Company Limited | Real estate | 1992 |
| Harmai Scaffolding Solutions Limited | Construction | 2019 |
| Haven Home Centre Limited | Wholesale & retail | 2003 |
| Haven Homes (Cumbria) Limited | Real estate | 2026 |
| Haven Tyre Centre Limited | Wholesale & retail | 2024 |
| HD Property Services (Cumbria) Ltd | Real estate | 2023 |
| Health and Beauty Whitehaven Ltd | Wholesale & retail | 2025 |
| Heavenly Fish and Chicken Ltd | Hospitality | 2019 |
| Helen Fenwick | | 1993 |
| Herish Properties Ltd | Real estate | 2021 |
| HIA Living Ltd | Real estate | 2025 |
| HIA Logistics Ltd | Transport & logistics | 2025 |
| High Grange Developments Limited | Real estate | 1999 |
| Hills QA Services Limited | Professional & scientific | 2020 |
| Holistic Reflections C.I.C. | Professional & scientific | 2019 |
| HRS Retail Rise Limited | Wholesale & retail | 2025 |
| Hurst Property Sourcing Ltd | Administrative & support | 2026 |
| I Johnson Consulting LLP | | 2024 |
| I.C. Inspection Services Ltd | Professional & scientific | 2006 |
| IAN Farrer Dent Removal Limited | Wholesale & retail | 2023 |
| Icano Holdings Ltd | Real estate | 2026 |
| IJC Consultants Limited | Professional & scientific | 2020 |
| Industrial Coatings (Cumbria) Ltd | Manufacturing | 2026 |
| INK Design Print (Cumbria) Limited | Manufacturing | 2012 |
| Inspired Property Portfolio Ltd | Real estate | 2023 |
| Intellect Technology Limited | Information & communication | 2004 |
| IRJ Cost Engineering Ltd | Professional & scientific | 2006 |
| IT Publishing Systems Limited | Information & communication | 1996 |
| ITJ Precision Engineering and Refurbishments Ltd | Manufacturing | 2025 |
| J F Garratt Limited | Administrative & support | 2015 |
| J Hogg Construction Ltd | Construction | 2022 |
| J O Dixon Jeweller Limited | Wholesale & retail | 2005 |
| J W W Allison and Sons (Holding) Limited | Financial services | 2020 |
| J. Madrick Limited | Hospitality | 2012 |
| J. S. T. Property Developments Limited | Construction | 2004 |
| J.Dixon & Son,Limited | Wholesale & retail | 1957 |
| Jacktrees Developments Limited | Construction | 2015 |
| Jandm Leisure (Northern) Ltd | Hospitality | 2026 |
| JCG Psychology CIC | Education | 2025 |
| JDF Safety Limited | Other services | 2015 |
| JJ Energy Solutions Ltd | Construction | 2026 |
| JJ Projects Ltd | Real estate | 2025 |
| JK Luxury Stays Ltd | Hospitality | 2025 |
| JK Prime Holdings Ltd | Financial services | 2024 |
| JM Group North West Limited | Construction | 2025 |
| John Whittle & SON Limited | Wholesale & retail | 1902 |
| Jokamb Properties Ltd | Extraterritorial | 2021 |
| JPS Controls Ltd | Professional & scientific | 2022 |
| JS Gorman Property Ltd | Real estate | 2024 |
| JT Inspection (Cumbria) Ltd | Administrative & support | 2024 |
| JW Yorkshire Limited | Hospitality | 2025 |
| JYE Projects Limited | Professional & scientific | 2009 |
| K & J Mcmean Limited | Information & communication | 2011 |
| K Kinsella and Daughters Ltd | Wholesale & retail | 2020 |
| KD Nails 35 Ltd | Other services | 2024 |
| Kenhurst Limited | Real estate | 2003 |
| Keskin Supreme Barber Ltd | Other services | 2020 |
| Kevin Thompson Decorators Limited | Construction | 2008 |
| KGR Advanced Solutions Limited | Construction | 2021 |
| Khee Properties Ltd | Real estate | 2024 |
| Khot IT Services Limited | Information & communication | 2025 |
| Kiings Barber Ltd | Other services | 2025 |
| Kingdom Hair Studio Limited | Other services | 2011 |
| KJC Inspections Limited | Administrative & support | 2007 |
| KL Building Contractors Ltd | Construction | 2025 |
| KM Power Services Limited | Construction | 2022 |
| Knotagain International Ltd | Professional & scientific | 2024 |
| KT Skip Hire Limited | Water & waste | 2024 |
| KTG Developments Ltd | Real estate | 2026 |
| Kthe Healthcare Ltd | Health & social care | 2010 |
| Kyfin Entertainment Limited | Hospitality | 2006 |
| Kylen Logistics Limited | Transport & logistics | 2026 |
| KZ Electrical Ltd | Construction | 2024 |