| Like Electrical Ltd | Construction | 2018 |
| Like Orchids Limited | Hospitality | 2017 |
| LIL (K) Limited | Real estate | 2021 |
| Lilluxes Limited | Arts & recreation | 2025 |
| Lilo Estates Ltd | Construction | 2025 |
| Lily Kerbey Music Ltd | Arts & recreation | 2026 |
| Lilybells EN Ltd | Other services | 2020 |
| Lilytrack Ltd | Real estate | 2018 |
| Limbu Living Co Ltd | Real estate | 2025 |
| Lime Pepper Ltd | Information & communication | 2003 |
| Lime Skills CIC | Education | 2011 |
| Limes Garage Ltd | Wholesale & retail | 2013 |
| Limetree Process Solutions Limited | Professional & scientific | 2025 |
| Limewash Media & Design Ltd | Administrative & support | 2010 |
| Limitless Sports & Activities Ltd | Education | 2024 |
| LIN Transport Ltd | Transport & logistics | 2026 |
| Lina Bejna Ltd | Hospitality | 2019 |
| Lina Legal Ltd | Professional & scientific | 2020 |
| Lincoln Hotels Limited | Real estate | 1997 |
| Linctech Limited | Professional & scientific | 2024 |
| Linda Dunn Copywriting Limited | Professional & scientific | 2017 |
| Lindform Ltd | Administrative & support | 2015 |
| Lindsey Lodge Farm Ltd | Agriculture & fishing | 2013 |
| Lindwell Hospitality Ltd | Professional & scientific | 2015 |
| Lineqen Tools Limited | Information & communication | 2026 |
| Linga Langa Limited | Health & social care | 2023 |
| Linhay Fine Homes Ltd | Construction | 2011 |
| Linkore Limited | Wholesale & retail | 2015 |
| Linkport Logistics (UK) Limited | Transport & logistics | 2025 |
| Links Direct Ltd | Wholesale & retail | 2009 |
| Links Holdings Limited | Financial services | 2017 |
| Linkseast Limited | Administrative & support | 2015 |
| Linktel Ltd | Information & communication | 2026 |
| Linn Business Development Ltd | Professional & scientific | 2025 |
| Lion Aura Ltd | Information & communication | 2023 |
| Lion Barn Developments Limited | Construction | 2004 |
| Lion Barn Investments Limited | Real estate | 1996 |
| Lion Group Holdings Limited | Financial services | 2021 |
| Lionpride Project Management and Building Services Ltd | Construction | 2023 |
| Liorea Aesthetics Clinic Ltd | Health & social care | 2024 |
| Lipa Properties Ltd | Real estate | 2023 |
| Lipame Ltd | Construction | 2015 |
| Lips Driving Academy Limited | Education | 2025 |
| Liquidline Limited | Wholesale & retail | 2010 |
| Lisa Thompson Author Limited | Arts & recreation | 2018 |
| Lisam Watch Ltd | Arts & recreation | 2023 |
| Lissie Mackintosh Ltd | Arts & recreation | 2024 |
| Listell Investments Limited | Extraterritorial | 2002 |
| Lister (GB) Limited | Extraterritorial | 2004 |
| Liston Properties Limited | Real estate | 2016 |
| Lisvane Systems Limited | Administrative & support | 2004 |
| Litebox Ltd | Information & communication | 2020 |
| Lithium Limited | Arts & recreation | 1997 |
| Litt Properties Ltd | Real estate | 2019 |
| Little Court Management Company Limited | Households | 2002 |
| Little Craft Print Company Limited | Wholesale & retail | 2023 |
| Little Gecko Ltd | Professional & scientific | 2018 |
| Little Hayes Ltd | Real estate | 2022 |
| Little Leaders Childcare Limited | Education | 2011 |
| Little Orange Puppy Ltd | Professional & scientific | 2016 |
| Little Polar Apps Ltd | Information & communication | 2011 |
| Little Pumpkin Properties Limited | Real estate | 2016 |
| Little Rock Limited | Manufacturing | 1992 |
| Little Sprout Ltd | Information & communication | 2025 |
| Little Tinkers World Limited | Wholesale & retail | 2024 |
| Little Tykes Balance Bikes Ltd | Wholesale & retail | 2023 |
| Little Yellow Box Ltd | Wholesale & retail | 2019 |
| Littleoak Specialist Cars Limited | Wholesale & retail | 2018 |
| Littlewind Ltd | Professional & scientific | 2018 |
| Livbearestates Limited | Real estate | 2021 |
| Livid Films Limited | Information & communication | 2009 |
| Living Aura Ltd | Wholesale & retail | 2019 |
| Living Care Services Limited | Health & social care | 2014 |
| Living Control Limited | Wholesale & retail | 2016 |
| Living LA Vida Loca Limited | Health & social care | 2016 |
| Livla Limited | Health & social care | 2020 |
| Lizzie Bird Limited | Arts & recreation | 2023 |
| Lizzy Yarnold Limited | Arts & recreation | 2014 |
| LJ Smart Ltd | Administrative & support | 2025 |
| LJB Logistics Ltd | Transport & logistics | 2023 |
| LJL Property Group Limited | Real estate | 2026 |
| LJM Risk Management Ltd | Financial services | 2022 |
| Ljmm Consulting Ltd | Professional & scientific | 2026 |
| LJP Plumbing & Heating Services Ltd | Construction | 2018 |
| Ljreeves Properties Ltd | Real estate | 2022 |
| Lk&R Ltd | Real estate | 2022 |
| LKS Plumbing & Heating Ltd | Construction | 2019 |
| LKS Trans Ltd | Transport & logistics | 2022 |
| LL Suffolk Ltd | Real estate | 2022 |
| LLB Consulting Limited | Administrative & support | 2024 |
| LLM Motors Limited | Wholesale & retail | 2026 |
| Llnst LP | | 2024 |
| Lloyd Parker Limited | Professional & scientific | 2007 |
| Lloyds Avenue Ipswich Management Limited | Households | 2000 |
| Lloyds Mobile Ltd | Wholesale & retail | 2024 |
| Lltg Developments Ltd | Real estate | 2021 |
| LM Industries Limited | Wholesale & retail | 2024 |
| LM Investments Ipswich Limited | Real estate | 2014 |
| LM Property Solutions Limited | Real estate | 2024 |
| LMA Technical Services Ltd | Professional & scientific | 2018 |