| Laburnum House Residents Association Limited | Households | 1968 |
| Labyrinth I.T. Services Limited | Information & communication | 1997 |
| Ladiesfirstdrivingschool Limited | Education | 2025 |
| Lagan Associates Limited | Professional & scientific | 2000 |
| Lagorce Ltd | Wholesale & retail | 2023 |
| Lailah Investments Limited | Real estate | 2024 |
| Lakshmi Vilas Ltd | Real estate | 2022 |
| Lalande Construction Ltd | Administrative & support | 2025 |
| Lalata Ltd | Wholesale & retail | 2025 |
| LAM Property Services Ltd | Real estate | 2021 |
| Lamnon Limited | Information & communication | 2015 |
| Lancewich Holdings Limited | Professional & scientific | 1999 |
| Lancewich Limited | Wholesale & retail | 1988 |
| Landen House Management Company Limited | Households | 2009 |
| Landscape Holdings Limited | Financial services | 1997 |
| Landscape Printing Systems Limited | Wholesale & retail | 1996 |
| Landscapes Berkshire Limited | Administrative & support | 2026 |
| Laneng Ltd | Professional & scientific | 2023 |
| Langhorn & Sons Limited | Other services | 2021 |
| Lansdowne Court (Camberley) Management Company Limited | Households | 1997 |
| Larkhall Analytics Ltd | Professional & scientific | 2019 |
| Larkspur Business Services Limited | Administrative & support | 2023 |
| Larot 1 Ltd | Hospitality | 2024 |
| Larot Limited | Hospitality | 2014 |
| Laser Hair Removal Clinic Ltd | Other services | 2016 |
| Laserlines Creative Limited | Professional & scientific | 2014 |
| Lastk Coaching Limited | Professional & scientific | 2023 |
| Latch Carpentry Limited | Manufacturing | 2023 |
| Latchmere Homes Ltd | Real estate | 2017 |
| Latymer House Management Company Limited | Households | 2009 |
| Laura Kate Reflexology & Holistic Therapies Ltd | Health & social care | 2023 |
| Laveux Ltd | Wholesale & retail | 2026 |
| Lavish Stays Limited | Real estate | 2026 |
| Lawnscience Wokingham Limited | Administrative & support | 2026 |
| Lawson Diamond Consulting Limited | Professional & scientific | 2022 |
| Lawyer Traders Limited | Wholesale & retail | 2024 |
| Layer 1 Communications Limited | Information & communication | 2017 |
| LD Hairdressing Limited | Other services | 2019 |
| LDJ Services and Restorations Limited | Wholesale & retail | 2019 |
| LDY Properties Limited | Real estate | 2023 |
| LE Panier London Ltd | Wholesale & retail | 2022 |
| LEA Farm Equestrian Ltd | Arts & recreation | 2024 |
| Leadership Lessons Ltd. | Education | 2017 |
| Leading Works Limited | Professional & scientific | 2011 |
| Leads Link Ltd | Professional & scientific | 2026 |
| Leadship Ltd | Construction | 2014 |
| Leaf Stone Consulting Limited | Information & communication | 2012 |
| Leafio Property Holdings Ltd | Wholesale & retail | 2025 |
| Leap Holdings (UK) Limited | Wholesale & retail | 2020 |
| Leap the Valley Ltd | Information & communication | 2023 |
| Leap ‘N’ Bounce Ltd | Administrative & support | 2020 |
| Leapfrog Training and Development Ltd | Professional & scientific | 2018 |
| Learning 2 Remember Limited | Education | 2018 |
| Lease Capital International Ltd | Professional & scientific | 2021 |
| Ledpro Lighting Limited | Manufacturing | 2002 |
| LEE Norris Design Ltd | Professional & scientific | 2024 |
| Left Right Motors Ltd | Wholesale & retail | 2024 |
| Legacy Law Limited | Professional & scientific | 2020 |
| Legacy Properties NW Limited | Real estate | 2024 |
| Legals@Case 3 Law Ltd | Professional & scientific | 2024 |
| Leisure Management Technology Limited | Information & communication | 2012 |
| Lemzin LLP | | 2025 |
| LEO Healthcare Group Ltd | Health & social care | 2023 |
| LEO Healthcare Holdings Ltd | Health & social care | 2023 |
| LEO Trading Ltd | Wholesale & retail | 2014 |
| Leonis Productions Limited | Information & communication | 2020 |
| Lesley Court Freehold (Reading) Limited | Households | 2004 |
| Lesley Court Management Company (Reading) Limited | Households | 1973 |
| Letslease Car Leasing Limited | Administrative & support | 2024 |
| Letslocalise Limited | Information & communication | 2018 |
| Letslocalise Social CIC | Education | 2023 |
| Lettings.Click Limited | Real estate | 2017 |
| Level Steps Property Ltd | Real estate | 2025 |
| Lexicon View Management Company Ltd | Households | 2018 |
| Leyblend Manufacturing Limited | Manufacturing | 1989 |
| LFS Construction Limited | Construction | 2023 |
| LGC Scaffolding Ltd | Construction | 2021 |
| LGR (UK) Ltd | Information & communication | 2005 |
| LH Analytics Limited | Information & communication | 2016 |
| LH Games Limited | Arts & recreation | 2017 |
| LH Project Solutions Ltd | Professional & scientific | 2024 |
| Libertatem Healthcare Group Limited | Health & social care | 2016 |
| Libertatem Healthcare Holdings Ltd | Health & social care | 2018 |
| Libra World Limited | Wholesale & retail | 2019 |
| Life's Little Bugs Ltd | Education | 2010 |
| Lifecycle Consultancy Services Ltd | Professional & scientific | 2019 |
| Liferebuild Limited | Health & social care | 2022 |
| Lifestyle Checkpoint Limited | Health & social care | 2015 |
| Lifetime Legal Limited | Other services | 2010 |
| Lift Creative Communication Design Limited | Manufacturing | 2007 |
| Lighthouse Electrical & Renewables Ltd | Construction | 2025 |
| Lilith Loves Henry Limited | Manufacturing | 2014 |
| Lillechurch Ltd | Real estate | 2021 |
| Limax Pro Ltd | Real estate | 2024 |
| Limitless Potential UK Ltd | Health & social care | 2017 |
| Limowide Limited | Transport & logistics | 2021 |
| Linchpin Innovation Limited | Professional & scientific | 2014 |
| Linguistic Phonics Training Ltd | Education | 2019 |
| Link Visiting Scheme | Health & social care | 2010 |
| Lion Rock Auto Services Ltd | Wholesale & retail | 2024 |