| LA Maritec Ltd | Transport & logistics | 2021 |
| Lacuna Estate Management Company Limited | Households | 2001 |
| Laeka Ltd | Health & social care | 2025 |
| Lake View (Midlands) Ltd | Construction | 2011 |
| Lanepark Limited | Administrative & support | 1999 |
| Langley Country Park Management Company Limited | Households | 2015 |
| Lansbury Management Services Ltd | Professional & scientific | 2018 |
| Last Booking Limited | Information & communication | 2006 |
| Lathbury PUB Company Ltd | Hospitality | 2026 |
| Laud Engineering Limited | Professional & scientific | 2017 |
| Lauralu UK Limited | Construction | 2014 |
| Laurel House Business Services Limited | Information & communication | 1989 |
| Lauren Land Developments Limited | Construction | 2016 |
| Laurence Alexander Morrison Limited | Extraterritorial | 2023 |
| Laurence Morrison Limited | Construction | 2023 |
| Lavender Grove Resident Management Company Limited | Households | 2015 |
| Lavo Logistics Ltd | Transport & logistics | 2025 |
| Lawson Diamond CUT Refinishing Limited | Wholesale & retail | 2022 |
| LBF Creative Ltd | Wholesale & retail | 2023 |
| Ldjk Ltd | Administrative & support | 2022 |
| Ldot Consultants Ltd | Health & social care | 2021 |
| Lead Connections Limited | Professional & scientific | 2023 |
| Leafe's Logistics Limited | Transport & logistics | 2013 |
| Leanne's Swim School Ltd | Arts & recreation | 2025 |
| Leckey Social Care Consultancy Ltd | Public administration | 2025 |
| Ledgerline Creative Solutions Limited | Professional & scientific | 2017 |
| Ledgerly Technology Ltd | Information & communication | 2026 |
| LEE Cartwright Limited | Construction | 2002 |
| Leenock Limited | Transport & logistics | 2013 |
| Lees Swim School Ltd | Arts & recreation | 2025 |
| Leicester Lane Residents Management Company Limited | Households | 2019 |
| Lemm Management Services Ltd | Construction | 2017 |
| LEO Lion 28-01 Limited | Transport & logistics | 2021 |
| Lets Chat Mate CIC | Health & social care | 2026 |
| Leveret Drive Residents Management Company Limited | Households | 2014 |
| Liberachi Couture Ltd | Wholesale & retail | 2020 |
| Liberty Fixings Ltd | Manufacturing | 2015 |
| Lick and Lash Limited | Wholesale & retail | 2017 |
| Lickorish Plumbing & Heating Ltd | Construction | 2023 |
| Life Atlas Coaching Ltd | Other services | 2016 |
| Limeyard Inns Ltd | Hospitality | 2026 |
| LIN Zhao Ltd | Hospitality | 2020 |
| Linatech Limited | Information & communication | 2014 |
| Lindos Rock Limited | Administrative & support | 2014 |
| Lingonberry Limited | Real estate | 1997 |
| Linmak Ltd | Health & social care | 2026 |
| Linton Village Hub Ltd | Transport & logistics | 2020 |
| Linton Village Store Ltd | Wholesale & retail | 2024 |
| Little Acorns Forest Schools Ltd | Education | 2016 |
| Little Angels PRE School (Swadlincote) Limited | Education | 2012 |
| Little Butterflies Woodville Preschool Community Interest Company | Education | 2006 |
| Little Cherubs Children's Nursery and Preschool Limited | Health & social care | 2017 |
| Little Lullaby Designs Ltd | Professional & scientific | 2026 |
| Little Wigston Truckstop Limited | Transport & logistics | 2021 |
| Live Lean Ltd | Professional & scientific | 2013 |
| Living Space (Malvern Oaks) Management Company Limited | Households | 2020 |
| Livinggreenfrugally Limited | Information & communication | 2015 |
| LIZ Milsom Properties Limited | Real estate | 2006 |
| LJP Transport Ltd | Transport & logistics | 2018 |
| LKJ Limited | Construction | 2004 |
| LL32 International Football Academy Ltd | Arts & recreation | 2015 |
| LL32 International Ltd | Wholesale & retail | 2017 |
| Llane Lets Play & Entertain Ltd | Arts & recreation | 2018 |
| Llane Logistics Ltd | Transport & logistics | 2011 |
| Llane Pubs Ltd | Other services | 2022 |
| Lloyds Cycles (Midlands) Limited | Wholesale & retail | 2017 |
| LMC Survey Solutions Limited | Professional & scientific | 2006 |
| LNE Property Ltd | Construction | 2018 |
| Lodge Close 1 RTM Company Limited | Households | 2020 |
| Lodge Close 2 RTM Company Limited | Households | 2020 |
| Lodge Farm Shop Ltd | Wholesale & retail | 2016 |
| Loft Ladders 4 YOU Limited | Extraterritorial | 2021 |
| London Health Education Wellness and Beauty Centre Ltd | Public administration | 2021 |
| Lonsdale Electrical Ltd | Construction | 2020 |
| Lonsdale Plumbing and Heating Limited | Construction | 2018 |
| Lord David John Hopgood Limited | Other services | 2025 |
| Lordswood Gardens Residents Management Company Limited | Households | 2014 |
| Lotus Education Services Limited | Education | 2025 |
| Lovely Box Ltd | Wholesale & retail | 2018 |
| Lovett & Goodfellow Ltd | Wholesale & retail | 2021 |
| Lowe Architects Ltd | Professional & scientific | 2019 |
| Lower Deck (Salcombe) Ltd | Real estate | 2020 |
| Lower Stondon Residents Management Company Limited | Households | 2019 |
| Lowton Heath Management Company Limited | Households | 2017 |
| Loxbrook Design and Management Limited | Construction | 2001 |
| LP Truck Ltd | Transport & logistics | 2023 |
| LPB Logistics Ltd | Transport & logistics | 2024 |
| LRH Fields View (Bagworth) Management Company Limited | Households | 2023 |
| LSH Carpentry & Joinery Limited | Construction | 2024 |
| LT Home Flip Ltd | Construction | 2025 |
| LT Transport Services Limited | Transport & logistics | 2019 |
| LTC Car Sales Limited | Wholesale & retail | 2017 |
| LTP Design & Print Limited | Extraterritorial | 2019 |
| LUC Estates Management Limited | Construction | 2025 |
| LUC Group Limited | Wholesale & retail | 2023 |
| Lucid Vision Ltd | Professional & scientific | 2023 |
| Lullington Park Cricket Club Limited | Arts & recreation | 2025 |
| Lumin Outdoor Studios Ltd | Administrative & support | 2022 |
| Lumina Day Labs Ltd | Hospitality | 2019 |
| Lumina Fleet Services Ltd | Transport & logistics | 2017 |