| Kingfisher Grave Care Services Limited | Other services | 2021 |
| Kingshott Haulage Holdings Limited | Financial services | 2022 |
| Kivro Homes Ltd | Real estate | 2021 |
| KM Digital Analytics Ltd | Information & communication | 2024 |
| KMP International Limited | Other services | 2022 |
| KN Interiors Ltd | Construction | 2015 |
| KNE Construction Ltd | Professional & scientific | 2025 |
| Knightingale Enterprises Ltd | Professional & scientific | 2025 |
| Knights & Company (Hampton) Limited | Professional & scientific | 1995 |
| Knights Farm Shop Ltd | Wholesale & retail | 2024 |
| Koru Cognitive Limited | Information & communication | 2026 |
| KRB Creative Limited | Wholesale & retail | 2013 |
| KS Heating and GAS Limited | Construction | 2026 |
| Ksec Ltd | Information & communication | 2023 |
| Kunwento Ltd | Other services | 2024 |
| Kyley Antonia Mccormick Limited | Extraterritorial | 2025 |
| Kyokushin Fighter Limited | Extraterritorial | 2013 |
| LA Vista Group Limited | Real estate | 2020 |
| Ladycroft Limited | Hospitality | 1976 |
| Laidlaw Garage Services Limited | Manufacturing | 2015 |
| Lake House Residents Association Limited | Extraterritorial | 1996 |
| Larkhill Complex Limited | Households | 1989 |
| Last Orders (Hastings) Limited | Wholesale & retail | 2023 |
| Lateral Strategies Limited | Other services | 2015 |
| Laura Newman-Gill Limited | Education | 2022 |
| Laurel Bank Management Co Limited | Professional & scientific | 2001 |
| Lavender Moss Limited | Information & communication | 2010 |
| LAWDER44 Ltd | Professional & scientific | 2024 |
| Laws Grab Services Ltd | Mining & quarrying | 2025 |
| Lawson Plumbing and Building Ltd | Construction | 2026 |
| Lazonby Court Limited | Households | 1999 |
| LB Corporate Solutions Limited | Other services | 2020 |
| LBS Sterling Ltd | Professional & scientific | 2023 |
| LDW Groundworks Ltd | Construction | 2024 |
| Leajet Ltd | Information & communication | 2016 |
| LEE Rose Ltd | Extraterritorial | 2024 |
| Legacy Land Holdings Ltd | Financial services | 2020 |
| Lemongized Limited | Manufacturing | 2019 |
| Lets Go Play (Hastings) Ltd | Arts & recreation | 2025 |
| Lewes Garage Services Limited | Wholesale & retail | 2018 |
| Lewes Scaffolding Ltd | Construction | 2006 |
| Lexbea Properties Limited | Real estate | 2010 |
| Life Nine Ltd | Information & communication | 2021 |
| Lifeguard Technologies Ltd | Information & communication | 2026 |
| Lilsie Investments Ltd | Real estate | 2025 |
| Lily's Veganics Ltd | Agriculture & fishing | 2023 |
| Limeworks Building Preservation Ltd | Construction | 2016 |
| Links Residents' Association Limited(The) | Hospitality | 1985 |
| Linley House Bexhill Limited | Construction | 2023 |
| Linton House Limited | Households | 2001 |
| Lismore Court (Bexhill) Limited | Real estate | 2001 |
| Listen Arts Ltd | Wholesale & retail | 2022 |
| Little India Bexhill Ltd | Hospitality | 2019 |
| Little Orchard (Ramsgate) Management Company Limited | Households | 2024 |
| Little Tree Furniture Limited | Extraterritorial | 2017 |
| Littlejohn Nexus LLP | | 2012 |
| Littlemore Property Ltd | Real estate | 2026 |
| Living Communities CIC | Professional & scientific | 2023 |
| Living in Balance Limited | Other services | 2016 |
| LJR PUB Co Ltd | Hospitality | 2025 |
| LJS of Fiveways Limited | Other services | 2016 |
| London Connoisseur Limited | Professional & scientific | 2013 |
| London Engineers Pattern Company Limited | Agriculture & fishing | 1938 |
| London Founder House Limited | Other services | 2025 |
| London Road Policy & Projects Ltd. | Professional & scientific | 2016 |
| London Workspace Projects Ltd | Construction | 2022 |
| Lone Wolf Associates Ltd | Real estate | 2012 |
| Long Acres Services Ltd | Construction | 2020 |
| Longhorn Capital Management Limited | Professional & scientific | 2011 |
| Longman Solutions Limited | Information & communication | 2026 |
| Lotus Women’S Healthcare Ltd | Health & social care | 2025 |
| Loud Logistics Ltd | Arts & recreation | 2021 |
| Loughlins Holdings Ltd | Real estate | 2018 |
| Louise Bryant Coaching Ltd | Health & social care | 2023 |
| Love Bexhill C.I.C. | Health & social care | 2017 |
| Love Food Loves Limited | Hospitality | 2021 |
| Lower Monkton Barns Ltd | Real estate | 2019 |
| LS Autotech Ltd | Wholesale & retail | 2025 |
| Lucas Designs Limited | Information & communication | 2010 |
| Lucy’S J&J Service Limited | Wholesale & retail | 2023 |
| Luna Menta Limited | Wholesale & retail | 2018 |
| Lunch and Stuff Limited | Hospitality | 2025 |
| Lunsford Manor Limited | Households | 1962 |
| LUX Locks by Edie Ltd | Other services | 2023 |
| Luxe Nails Ltd | Other services | 2024 |
| Luxurious Living Homes Limited | Construction | 2019 |
| LXM Credit Solutions Limited | Financial services | 2014 |
| Lynton House(Bexhill)Limited | Households | 1958 |
| Lynwood Court Residents Association Limited | Real estate | 2000 |
| M & E GB Limited | Construction | 2009 |
| M & H Catering Limited | Hospitality | 2019 |
| M a Cooper Bathrooms Limited | Construction | 2011 |
| M&M Stage Productions Ltd | Arts & recreation | 2013 |
| Maberley Consultancy Limited | Professional & scientific | 2025 |
| Madhatters Limited | Information & communication | 2005 |
| Maesmaids Ltd | Administrative & support | 2025 |
| Magdalen Court Limited | Households | 1967 |
| MAGENTA61 LLP | | 2022 |
| Maggie's Day Nursery Ltd | Health & social care | 2020 |
| Majithia Holdings Limited | Professional & scientific | 2018 |