| Life Therapy and Personal Development Ltd | Health & social care | 2014 |
| Lifecanopy Ltd | Agriculture & fishing | 2026 |
| LIFELINE247 Limited | Administrative & support | 2026 |
| Lifelong Builders Limited | Construction | 2017 |
| Lifes a Trap Official UK Ltd | Wholesale & retail | 2025 |
| Lifespirit Consultancy Ltd | Professional & scientific | 2008 |
| Lifespring Residences Ltd | Health & social care | 2024 |
| Lifestyle Home Solutions Ltd | Administrative & support | 2008 |
| Lifestyle Studies Limited | Administrative & support | 2010 |
| Lifetime Individual Savings Accounts Limited | Financial services | 2014 |
| Lifetimes Trading Limited | Education | 2009 |
| Lifeways Foods Limited | Manufacturing | 2019 |
| Light & Space Limited | Professional & scientific | 2023 |
| Light Engineers Limited | Manufacturing | 2005 |
| Light Films Limited | Information & communication | 2006 |
| Light Homecare Limited | Health & social care | 2024 |
| Light Ocean Ltd | Wholesale & retail | 2021 |
| Light of Hope for ALL CIC | Health & social care | 2022 |
| Light Pillar Software Ltd | Information & communication | 2012 |
| Light Science Technologies Holdings PLC | Financial services | 2020 |
| Light Science Technologies Ltd | Agriculture & fishing | 2019 |
| Light Services Ltd | Construction | 2025 |
| Lightbulb Analytics Limited | Information & communication | 1984 |
| Lighthouse Way Ltd | Professional & scientific | 2024 |
| Lighting Tech Ltd | Wholesale & retail | 2023 |
| Lightken Ltd | Wholesale & retail | 2012 |
| Lightning Electrics GM Ltd | Construction | 2025 |
| Lightning Networks Limited | Information & communication | 2022 |
| Lights on Entertainment Limited | Information & communication | 2023 |
| Lightwave Games Limited | Information & communication | 2026 |
| Lignum Forestry Ltd | Agriculture & fishing | 2026 |
| Lilac (Eco) Ltd | Agriculture & fishing | 2021 |
| Lilacdene Limited | Financial services | 1999 |
| Lili Transport&Candles Ltd | Manufacturing | 2026 |
| Liliz Klinik Limited | Other services | 2023 |
| Lilley Investments Limited | Real estate | 2019 |
| Lilly PAD Consulting Ltd | Professional & scientific | 2022 |
| Lillybrooke Management Ltd | Real estate | 2021 |
| Lilten Limited | Wholesale & retail | 2002 |
| Lilu Kotonska Ltd | Transport & logistics | 2022 |
| Lily of the Valley Care Ltd | Health & social care | 2019 |
| Lily of the Valley Properties Ltd | Real estate | 2023 |
| Lily's FUR Guests Doggy Daycare and Boarding Ltd | Other services | 2025 |
| Lily's Pork Stores Limited | Wholesale & retail | 2017 |
| Lilybet & Didier Enterprises Ltd | Wholesale & retail | 2026 |
| Lima Mini Market Ltd | Wholesale & retail | 2023 |
| Lime Books Limited | Information & communication | 2019 |
| Lime Lane Livery Farm Limited | Administrative & support | 2009 |
| Lime Line Cleaning Ltd | Administrative & support | 2025 |
| Lime Neddy Limited | Administrative & support | 2024 |
| Lime Walk Mews Management Company Limited | Households | 2005 |
| Limes and Stanstead Ltd | Health & social care | 2025 |
| Limesbrook Holdings Limited | Professional & scientific | 2012 |
| Limpopo Engineering Limited | Wholesale & retail | 2025 |
| Linby Homes Limited | Real estate | 2008 |
| Lincs Care Homes Limited | Health & social care | 2024 |
| Lind.Blom Property Limited | Real estate | 2017 |
| Linden Care Home (Derby) Limited | Health & social care | 2010 |
| Linden LEA Property Developments Limited | Construction | 2023 |
| Lindley Park (Huddersfield) Management Company Limited | Households | 2013 |
| Line-A-Pipe Services Ltd | Professional & scientific | 2020 |
| Lineone Management Ltd | Administrative & support | 2017 |
| Link Associates International | | 1997 |
| Link ICT Services Limited | Information & communication | 2012 |
| Linley Developments Ltd | Construction | 2021 |
| Linna Ltd | Other services | 2019 |
| Linnet Digital Ltd | Information & communication | 2012 |
| Lion IT Consulting Ltd | Information & communication | 2019 |
| Lionheart Films Ltd | Information & communication | 2026 |
| Lionlabs Technologies Ltd | Administrative & support | 2023 |
| Lionradh Ltd | Information & communication | 2018 |
| Lionsforever Ltd | Wholesale & retail | 2022 |
| Lipa Projects Ltd | Professional & scientific | 2018 |
| Liquid Atlantic Limited | Manufacturing | 2017 |
| Liquor-Uk Ltd | Wholesale & retail | 2023 |
| Lirbai Krupa Ltd | Information & communication | 2024 |
| LIS 89 Limited | Wholesale & retail | 2025 |
| Lisa Derby City Ltd | Arts & recreation | 2022 |
| Lisa Inspired Viral Encephalitis Foundation Limited | Professional & scientific | 2008 |
| Lisa Jane Furniture Ltd | Wholesale & retail | 2019 |
| Lisa S Gray Limited | Financial services | 2016 |
| Lisa Stonehouse Safeguarding Consultant Ltd. | Health & social care | 2019 |
| Lisa's Signature Events Ltd | Administrative & support | 2026 |
| Lisafountain Catering Limited | Administrative & support | 1985 |
| Lisleen Food Ltd | Hospitality | 2026 |
| Lisrah Limited | Health & social care | 2023 |
| Lite Ventures Ltd | Professional & scientific | 2025 |
| Litestart Ltd | Administrative & support | 2025 |
| Litting Associates Ltd. | Professional & scientific | 1998 |
| Little Angels Playschool CIC | Education | 2013 |
| Little Apparel Limited | Wholesale & retail | 2018 |
| Little BIT Funny Ltd | Wholesale & retail | 2025 |
| Little BIT of Heaven Limited | Manufacturing | 2015 |
| Little BOW Boutique Ltd | Wholesale & retail | 2026 |
| Little Brewing Company Ltd | Manufacturing | 2020 |
| Little Brits Stores Limited | Wholesale & retail | 2026 |
| Little Chester (NO.2) Management Company Limited | Households | 2004 |
| Little Chester Management Company Limited | Real estate | 2002 |
| Little Forest Folk Ltd | Education | 2014 |
| Little Forest Folk TOO Ltd | Education | 2016 |