| Holbeck Ghyll Estate Limited | Hospitality | 2021 |
| Holbeck Ghyll Hotel LLP | | 2008 |
| Holiday & Resort Finance Limited | Hospitality | 1992 |
| Hollywood Cafe Limited | Hospitality | 2010 |
| Homey Retreats Limited | Real estate | 2024 |
| Horizon Boat Sales Ltd | Wholesale & retail | 2020 |
| Hough Tullett Limited | Professional & scientific | 2006 |
| House of AJ Windermere Ltd | Real estate | 2025 |
| Howe Gardens Management Limited | Real estate | 2007 |
| Hubbard Architecture Limited | Professional & scientific | 1998 |
| Hughes Services Ltd | Wholesale & retail | 2022 |
| Hummbolt Ltd | Real estate | 2024 |
| Hunters Croft Management Company Limited | Real estate | 2003 |
| Hussell UP Limited | Professional & scientific | 2025 |
| HW Crafts Ltd | Wholesale & retail | 2020 |
| IA42 Ltd | Professional & scientific | 2018 |
| IAN Penney Painting Ltd | Construction | 2018 |
| Ibbetson Ltd | Manufacturing | 2024 |
| Ibml Ltd | Hospitality | 2018 |
| ICF Building Services Ltd | Construction | 2021 |
| Icicle Mountaineering Ltd | Wholesale & retail | 2001 |
| Ikan Limited | Wholesale & retail | 2018 |
| Industrial Consultancy Ltd | Professional & scientific | 2004 |
| Ingenious Contact Ltd | Information & communication | 2017 |
| Iteriad Limited | Administrative & support | 2012 |
| Izolo Limited | Information & communication | 2011 |
| J & S Inns Limited | Hospitality | 2012 |
| J H Goods Ltd | Transport & logistics | 2023 |
| J K Faulkner Limited | Construction | 2001 |
| J R Hairdressing Limited | Other services | 2007 |
| J T Projects (Bath) Limited | Professional & scientific | 2021 |
| J.A.C. Property Services (Windermere) Limited | Construction | 2005 |
| J.H. Nightingale Limited | Other services | 1937 |
| J.W. Kenyon Construction Limited | Construction | 2003 |
| Jackson Properties (Lake District) Limited | Real estate | 2005 |
| Jacksons (Cumbria) Ltd | Hospitality | 2009 |
| Jamie Booth Ltd | Administrative & support | 2025 |
| Jane Hawkins Design Ltd | Construction | 2013 |
| Jaxwin Ltd | Hospitality | 2022 |
| JB Consulting (Europe) Limited | Professional & scientific | 2020 |
| Jeffrey & Rigg Limited | Professional & scientific | 2001 |
| Jessie Gittins Ltd | Wholesale & retail | 2025 |
| JET Estates Ltd | Real estate | 2025 |
| Jintana Limited | Hospitality | 2008 |
| JK Training Ltd | Arts & recreation | 2015 |
| Jlch Properties Ltd | Real estate | 2025 |
| JLR Electrical Contractors Ltd | Manufacturing | 2020 |
| Jordan Buchanan Services Ltd | Real estate | 2021 |
| JRB Risk Management Limited | Professional & scientific | 2015 |
| Just Bars Ltd | Hospitality | 2020 |
| Kaizen Drinks Limited | Manufacturing | 2024 |
| Kankku (Holdings) Limited | Real estate | 2014 |
| Kbs-Cumbria Limited | Construction | 2018 |
| Keldwyth Consulting Ltd | Professional & scientific | 2013 |
| Kentgate Place Management Company Limited | Households | 2009 |
| Kentmere Campers Ltd | Wholesale & retail | 2024 |
| Kentsbank House Management Company Limited | Households | 1998 |
| Kerris Place Management Company Limited | Households | 1999 |
| Kevin Pinder Joinery Limited | Manufacturing | 2002 |
| Kinetic Design & Development Limited | Professional & scientific | 2014 |
| Kirkstone Bathrooms, Tiles & Shutters Limited | Wholesale & retail | 2019 |
| KMW Energy Consulting 2019 Ltd | Professional & scientific | 2022 |
| Kore Wellbeing Ltd | Arts & recreation | 2026 |
| Koru UK Limited | Wholesale & retail | 2005 |
| KW Auto Repairs Limited | Wholesale & retail | 2024 |
| KWJ Coaching and Consulting Ltd | Professional & scientific | 2020 |
| KWK Property Ltd | Real estate | 2026 |
| LA Lune Tattoo Ltd | Other services | 2022 |
| Laik Ltd | Real estate | 2019 |
| Lake Adventures Limited | Arts & recreation | 2023 |
| Lake District Chauffeurs Limited | Transport & logistics | 2025 |
| Lake District Loft Apartments Ltd | Hospitality | 2023 |
| Lake District Vehicle Sales Limited | Real estate | 2015 |
| Lake District Wedding Cars Limited | Transport & logistics | 2025 |
| Lake District Woodland Pods Ltd | Hospitality | 2022 |
| Lakeland Asbestos Management Services Limited | Water & waste | 2012 |
| Lakeland Capital Investments Ltd | Construction | 2018 |
| Lakeland Charcoal Grill Limited | Hospitality | 2025 |
| Lakeland Chauffeurs Limited | Transport & logistics | 2025 |
| Lakeland Cleaners Limited | Administrative & support | 2022 |
| Lakeland Data Solutions Limited | Information & communication | 2024 |
| Lakeland Landscapes Limited | Other services | 1996 |
| Lakeland Marine Ltd | Agriculture & fishing | 2015 |
| Lakeland Overland Ltd | Hospitality | 2022 |
| Lakeland Trails Ltd | Arts & recreation | 2015 |
| Lakeland Valeting Limited | Administrative & support | 2002 |
| Lakelands Waterhead Limited | Households | 2004 |
| Lakelife-Charters Ltd | Transport & logistics | 2024 |
| Lakes and Country Ltd | Wholesale & retail | 2019 |
| Lakes Arts Festivals Limited | Arts & recreation | 2012 |
| Lakes Christian Centre | Other services | 2010 |
| Lakes Commercial Services Ltd | Professional & scientific | 2024 |
| Lakes Cottage Supplies Ltd | Administrative & support | 2021 |
| Lakes Liquid Screeds Ltd | Construction | 2012 |
| Lakes Sauna Company Ltd | Construction | 2023 |
| Lakes Vehicle Centre Ltd | Wholesale & retail | 2017 |
| Lakes Yoga Ltd | Arts & recreation | 2023 |
| Lakeside Executive Travel Services Limited | Transport & logistics | 2025 |
| Lakeview Gardens Ltd | Administrative & support | 2022 |
| Land & Holdings Limited | Construction | 2024 |