| KJD Advertising Limited | Professional & scientific | 2009 |
| KLK Sound Limited | Information & communication | 2007 |
| Knapp Cottages Limited | Hospitality | 2026 |
| Knifey Spoony Limited | Hospitality | 2025 |
| Knightswood Lodge Management Company Limited | Households | 2003 |
| Kohli Enterprises Ltd | Wholesale & retail | 2023 |
| Kred Holdings Ltd | Financial services | 2019 |
| KS Groundwork Services Limited | Construction | 2025 |
| Kudu Haulage Ltd | Transport & logistics | 2024 |
| Kumon Centre South Bristol LLP | | 2023 |
| Kuzniar Property Lettings LLP | | 2025 |
| L & S Discounts Limited | Wholesale & retail | 2003 |
| L E Humphreys Electrical Services Limited | Construction | 2025 |
| L Ricketts Investments Limited | Real estate | 2020 |
| L Ricketts Property Ltd | Real estate | 2018 |
| Labbrook Limited | Information & communication | 1994 |
| Ladymead (Castle Road Clevedon) Management Company Limited | Professional & scientific | 1977 |
| LAG Telecoms Limited | Administrative & support | 2015 |
| Lakelands Edge Management Company Limited | Households | 2006 |
| Lakeside Escape at Plantations Ltd | Hospitality | 2026 |
| Lakeside Films Ltd | Professional & scientific | 2008 |
| Land and Minerals Consulting Limited | Professional & scientific | 2004 |
| Langford Productions Limited | Arts & recreation | 2016 |
| Langleigh Management Company Limited | Households | 2008 |
| Lanzio Limited | Information & communication | 2024 |
| Larimar Furniture Limited | Wholesale & retail | 1988 |
| Larsen Clare Ltd | Transport & logistics | 2025 |
| Laserline Engineering Services Limited | Manufacturing | 2009 |
| Laxmi Villas Ltd | Real estate | 2021 |
| Lctn Properties Ltd | Real estate | 2024 |
| LD Chepstow Ltd | Hospitality | 2014 |
| Leadoso Limited | Information & communication | 2013 |
| Leaf and Bean Limited | Hospitality | 2021 |
| Leanne Bridges Ltd | Professional & scientific | 2019 |
| Leasepremium Property Management Limited | Households | 1995 |
| Lee's Autocentre Limited | Wholesale & retail | 2024 |
| Lendley Limited | Hospitality | 2012 |
| LEO Enforcement Ltd | Administrative & support | 2024 |
| LET IT (UK) Ltd | Extraterritorial | 1998 |
| Leverhead Limited | Households | 1992 |
| Lewis Boiler Services Limited | Construction | 2020 |
| Lewis James (SW) Ltd | Transport & logistics | 2018 |
| LG Controls Ltd | Manufacturing | 2002 |
| LHN Autos Ltd | Wholesale & retail | 2021 |
| LHP Creation Limited | Information & communication | 2016 |
| Liberty Mews (Bristol) Management Company Limited | Households | 2004 |
| Lily Mazzotta Psychology Ltd | Education | 2025 |
| Linden Lodge Dental Care Limited | Health & social care | 2011 |
| Lindsay Hipkiss Consultancy Limited | Professional & scientific | 2019 |
| Little ALE House Ltd | Hospitality | 2026 |
| Little HAM Properties Ltd | Real estate | 2025 |
| Little Leaf & Bean Ltd | Wholesale & retail | 2024 |
| Living Spit | Arts & recreation | 2016 |
| Living Waters Church | Education | 1999 |
| Ljgg Properties Limited | Households | 2025 |
| LJH Landscaping SW Ltd | Administrative & support | 2025 |
| Llewellyn Property Lettings LLP | | 2024 |
| Lloyd and Rose Buck Ltd | Information & communication | 2005 |
| LMJ Consulting Limited | Professional & scientific | 2008 |
| Loaf Spark Ltd | Professional & scientific | 2015 |
| Local Intensive Limited | Education | 2021 |
| Logic Construction Design Services Ltd | Construction | 2000 |
| Logicchain Ltd | Information & communication | 2025 |
| Loki Property Limited | Real estate | 2018 |
| London Creative Post Limited | Information & communication | 2017 |
| Longlife Motors Limited | Wholesale & retail | 2016 |
| Longman Pubs Ltd | Hospitality | 2024 |
| Louem Pubs Ltd | Hospitality | 2025 |
| Lowkey Properties Ltd | Real estate | 2019 |
| Lowratecarfinance Limited | Wholesale & retail | 2021 |
| LP 65 Limited | Arts & recreation | 2023 |
| LP Logistical Transport Services Ltd | Transport & logistics | 2017 |
| LPG Switch Limited | Energy | 2025 |
| Luckwell Garage Limited | Wholesale & retail | 2011 |
| Lumeneye Limited | Professional & scientific | 2018 |
| Lumio Technologies Ltd. | Information & communication | 2016 |
| LUX Carpentry & Joinery Limited | Manufacturing | 2020 |
| Luxe Barn Ltd | Real estate | 2025 |
| Luxury Nail Bar Ltd | Other services | 2023 |
| Luxury Nails World Ltd | Other services | 2024 |
| LW G-Works Limited | Construction | 2016 |
| LYM Associates Ltd | Professional & scientific | 2015 |
| M & DW Construction & Carpentry Limited | Construction | 2019 |
| M a Adams (Clevedon) Limited | Professional & scientific | 2013 |
| M Jennings & Co Ltd | Manufacturing | 2009 |
| M&C Pubs Limited | Hospitality | 2025 |
| MA Properties South West Limited | Real estate | 2022 |
| Madeira Road Flat Management Company Limited | Households | 1979 |
| Madel UK Limited | Extraterritorial | 2022 |
| Magic D&L Hand Car Wash Ltd | Other services | 2017 |
| Mannion Construction Limited | Construction | 2026 |
| Manor Farm (Bradley Stoke) Management Company Limited | Households | 2006 |
| Manu Botanicals Hair Studio Limited | Other services | 2022 |
| MAP Property Holdings & Development Limited | Construction | 2023 |
| MAP Systems Ltd | Administrative & support | 2018 |
| Marc Manning Limited | Health & social care | 2018 |
| Marindin Limited | Real estate | 2019 |
| Marine Hill Management Limited | Households | 1989 |
| Marine Place Management Company Ltd | Real estate | 2020 |
| Maristella E Limited | Wholesale & retail | 2025 |