| Keswick Dental Care Limited | Health & social care | 2023 |
| Keswick Golf Club Limited | Arts & recreation | 1966 |
| Keswick Golf Club Trading Limited | Other services | 2025 |
| Keswick Joiners Limited | Construction | 2005 |
| Keswick Museum and Art Gallery Management Limited | Arts & recreation | 2007 |
| Keswick Painting and Decorating Supplies Ltd | Wholesale & retail | 2018 |
| Keswick School Multi Academy Trust | Education | 2011 |
| Keswick Superglaze Limited | Construction | 2002 |
| Keswick Tourism Association Limited | Other services | 2004 |
| Keswick Wealth Management Limited | Financial services | 2015 |
| Kindred Spirits Group Ltd | Wholesale & retail | 2022 |
| Kindred Spirits Hospitality Ltd | Wholesale & retail | 2025 |
| Kindred Spirits Retail Limited | Wholesale & retail | 2018 |
| King Kong Climbing Centre Ltd | Arts & recreation | 2013 |
| Kingfisher (Keswick) Limited | Hospitality | 2015 |
| Kitsune Kaizen Limited | Professional & scientific | 2023 |
| Kong Climbing Ltd | Manufacturing | 2021 |
| KT Management Limited | Households | 1993 |
| Ladstock Hall Management Limited | Real estate | 2005 |
| Lake District Hotels (Patterdale) Limited | Hospitality | 2023 |
| Lake District Hotels Limited | Hospitality | 1983 |
| Lake District Off-Road Limited | Arts & recreation | 2020 |
| Lake District Wine Ltd | Wholesale & retail | 2022 |
| Lakeland Cafe Culture Ltd | Hospitality | 2011 |
| Lakeland Cottages Limited | Hospitality | 2000 |
| Lakeland Wellbeing CIC | Health & social care | 2024 |
| Lakes Bar & Bistro LLP | | 2012 |
| Lakes Coffee Services Limited | Manufacturing | 2015 |
| Lakes Limoncello Ltd | Manufacturing | 2023 |
| Lakes Marquees Ltd | Administrative & support | 2024 |
| Lcec UK Ltd | Hospitality | 2023 |
| LD Tomlinson Limited | Professional & scientific | 2018 |
| Leah Lou's Beauty & Hair Ltd | Other services | 2019 |
| Leopard Seal Limited | Information & communication | 2024 |
| Lingholm Farms Limited | Agriculture & fishing | 2020 |
| Lingholm Private Trust Limited,(The) | Other services | 1966 |
| Lipu 75 Limited | Hospitality | 2025 |
| Live 4 Adventure Limited | Arts & recreation | 2015 |
| LJH Enterprises Limited | Wholesale & retail | 2020 |
| Lochinver Larder Limited | Hospitality | 2019 |
| LOW Nest Ltd | Manufacturing | 2024 |
| LRB Keswick Limited | Hospitality | 2020 |
| LSB PUB Management Ltd | Hospitality | 2021 |
| Lucid Initiatives Limited | Administrative & support | 2002 |
| Luke Birkett Property Ltd | Hospitality | 2026 |
| Luptons Court (Keswick) Limited | Other services | 2011 |
| M & K Update Limited | Information & communication | 1999 |
| Macarthur Recruitment Limited | Administrative & support | 2015 |
| Madisonware Consulting Limited | Professional & scientific | 2017 |
| Magic Mountain Cafe Bar Limited | Hospitality | 2021 |
| Magicka School Limited | Education | 2013 |
| Magpie at Maysons (Keswick) Limited | Wholesale & retail | 2013 |
| Mallard Foster Limited | Information & communication | 1979 |
| Manuka Cycleworks Limited | Manufacturing | 2023 |
| Martin Cuthell Limited | Professional & scientific | 2003 |
| Mawdsley Bleachers Limited | Hospitality | 1950 |
| Mcclellan Holiday Cottages Limited | Real estate | 2019 |
| Mcclellan Properties Limited | Real estate | 2017 |
| Messrs M.D Oswald Limited | Construction | 2003 |
| Miglio Company Limited | Wholesale & retail | 2002 |
| Mike Cave Pyro Ltd | Professional & scientific | 2007 |
| Mike Dalzell Plumbing and Heating Engineer Ltd | Construction | 2005 |
| Mike Fell Building Contractor Limited | Construction | 2008 |
| Millbank Garage Limited | Wholesale & retail | 2003 |
| Mint Chinese Film Festival CIC | Information & communication | 2023 |
| Mirehouse Short Breaks Limited | Hospitality | 2021 |
| Mobile Adventure Limited | Other services | 2022 |
| MOS Bespoke Furniture Ltd | Manufacturing | 2008 |
| Mountain Expeditions Limited | Other services | 2021 |
| Mountain Heritage Trust | Arts & recreation | 2000 |
| Multiplex Design Solutions Limited | Professional & scientific | 2000 |
| N J Davies & Sons Builders Limited | Construction | 2010 |
| Nepstar Ltd | Information & communication | 2020 |
| Newlands Adventure Centre Ltd | Hospitality | 1999 |
| NO Monkey Business Limited | Wholesale & retail | 2022 |
| Nomapnocompass Ltd | Hospitality | 2019 |
| North Lakeland Cottage Management Agency Ltd | Real estate | 2018 |
| North Lakes Confectionery Limited | Wholesale & retail | 2025 |
| North Lakes Health Limited | Health & social care | 2025 |
| North Lakes Stained Glass Ltd | Wholesale & retail | 2024 |
| Northern Fells Hospitality Group Limited | Hospitality | 2025 |
| Oak Lodge (Keswick) Ltd | Hospitality | 2021 |
| Oakside Holiday Rentals Ltd | Hospitality | 2026 |
| Old Farm Mews Limited | Hospitality | 2014 |
| Oliver Kendrick Ltd | Real estate | 2026 |
| Opsony Ltd. | Professional & scientific | 2002 |
| Opus Advertising Ltd | Professional & scientific | 2023 |
| Otley Terrace Management Company Limited | Real estate | 2005 |
| Otsdr Ltd | Professional & scientific | 2022 |
| Paddock Development (Keswick) Management Company Limited(The) | Real estate | 1982 |
| Paul Cornforth Limited | Construction | 2003 |
| Peak Campers Ltd | Hospitality | 2023 |
| Peter Fowles Surveyors Ltd | Administrative & support | 2019 |
| Pheasant Inn Keswick Limited | Hospitality | 2018 |
| Phonocode Ltd | Information & communication | 2025 |
| Piri Fresco Limited | Hospitality | 2025 |
| Portinscale Consulting Limited | Professional & scientific | 2020 |
| Pound for Life Limited | Wholesale & retail | 2006 |
| R & D Nutrition Limited | Health & social care | 2014 |
| R & R Grave Ltd | Construction | 2015 |