| LET 'EM Play CIC | Education | 2025 |
| Let's Together Limited | Construction | 2024 |
| Letchford Swifts Limited | Manufacturing | 1982 |
| Lets Move in Ltd | Real estate | 2015 |
| Let’S GET Personal Limited | Arts & recreation | 2025 |
| Level Interiors Ltd | Construction | 2023 |
| Level MAX Limited | Other services | 2024 |
| LEVEL3 Limited | Extraterritorial | 2018 |
| Levels Capital Consultancy Ltd | Financial services | 2025 |
| Levente and Sons Ltd | Wholesale & retail | 2026 |
| Lewafabricsanddesign Ltd | Wholesale & retail | 2026 |
| Lexus Property Services Ltd | Construction | 2024 |
| Leycroft Lettings Ltd | Real estate | 2020 |
| Leyway Properties Ltd | Real estate | 2024 |
| LFD Roofing Ltd | Construction | 2026 |
| LG Groundworks & Civils Ltd | Construction | 2017 |
| LGI Developments Limited | Real estate | 2019 |
| LGS Transport Ltd | Transport & logistics | 2018 |
| LH General Care Limited | Health & social care | 2018 |
| Lian's Chinese Takeaway Ltd | Hospitality | 2025 |
| Libaas Designer Wear Ltd | Wholesale & retail | 2017 |
| Libra Care Limited | Health & social care | 2012 |
| Libre Developments Ltd | Real estate | 2023 |
| Lichfield Cottages Limited | Real estate | 2013 |
| Lichfield Couriers & Logistics Ltd | Transport & logistics | 2022 |
| Lichfield Local Assist Limited | Transport & logistics | 2021 |
| Lidwellmear Ltd | Administrative & support | 2024 |
| Liebe Leisure Group Ltd | Wholesale & retail | 2019 |
| Life Voyage Services Ltd | Real estate | 2019 |
| Lifecook Ltd | Hospitality | 2026 |
| Lifegate Communities Limited | Other services | 2014 |
| Lifegate Outreach Centre Ltd | Other services | 2013 |
| Lifeline First AID Training Limited | Education | 2006 |
| Lifeline Living Ltd | Real estate | 2025 |
| Lifes a Niche Ltd | Information & communication | 2021 |
| Lifestyle Equestrian (Midlands) Ltd | Wholesale & retail | 2026 |
| Lifestyle Equestrian Limited | Wholesale & retail | 2025 |
| Lifestyle Healthcare Properties Ltd | Real estate | 2022 |
| Lifestyle Support Limited | Health & social care | 2006 |
| Lifestylebyomot Ltd | Health & social care | 2025 |
| Lift & Shift Fitness Ltd | Arts & recreation | 2026 |
| Ligersaur Ltd | Real estate | 2022 |
| Lightcal Ltd | Manufacturing | 2015 |
| Lighteach Development Ltd | Construction | 2021 |
| Lightologist Ltd | Wholesale & retail | 2021 |
| Lights & More (Birmingham) Ltd | Wholesale & retail | 2024 |
| Lightwave Plus Ltd | Information & communication | 2020 |
| Lightwave Pro Limited | Wholesale & retail | 2020 |
| Lightwaverf Ltd | Professional & scientific | 2008 |
| Lightwaverf Technology Limited | Professional & scientific | 2007 |
| Lightworks Corporate Photography Ltd | Information & communication | 2000 |
| Lightworks Property Lettings Ltd | Real estate | 2024 |
| Lightworks Services Ltd | Construction | 2008 |
| Likeaproperty Ltd | Real estate | 2022 |
| Lilac Grove Limited | Administrative & support | 2021 |
| Lilburne AI (UK) Ltd | Information & communication | 2025 |
| Lilipop Mill Ltd | Manufacturing | 2019 |
| Lilly Homes Ltd | Real estate | 2021 |
| Lily Bloom Cakes Ltd | Manufacturing | 2016 |
| Lily DOT Aesthetics Ltd | Other services | 2025 |
| Lime Lace Ltd | Wholesale & retail | 2012 |
| Limez FM Live Ltd | Arts & recreation | 2023 |
| Limezaer Ltd | Administrative & support | 2024 |
| Limitless Consulting Ltd | Financial services | 2023 |
| Limitless Installations Ltd | Construction | 2019 |
| Limitless Media Group Limited | Professional & scientific | 2026 |
| Limitless Resources Ltd | Administrative & support | 2014 |
| Limitlessuk Ltd | Construction | 2016 |
| Limits UN Limited | Transport & logistics | 2007 |
| Lindsay Jane Property Limited | Real estate | 2026 |
| Linemark UK (Midlands) Limited | Construction | 2003 |
| Linens Home Limited | Wholesale & retail | 2026 |
| Lingard Limited | Extraterritorial | 1992 |
| Link Business Holdings Limited | Manufacturing | 2012 |
| Link Business Limited | Manufacturing | 2005 |
| Link Properties One Limited | Construction | 2020 |
| Linked UP Globally Ltd | Wholesale & retail | 2026 |
| Linkmen Limited | Construction | 2017 |
| Linplast Limited | Construction | 2007 |
| Linton Autos Ltd | Professional & scientific | 2023 |
| Linxs Cleaning Ltd | Wholesale & retail | 2022 |
| Lion EX Holdings Limited | Real estate | 2025 |
| Lion Exhibition Services Ltd | Administrative & support | 2014 |
| Lions Property Limited | Real estate | 2019 |
| Liprum Ltd | Wholesale & retail | 2024 |
| Lipsip Investments Limited | Financial services | 2020 |
| Lipsip Limited | Hospitality | 2020 |
| Lisa LEE Wealth Management Ltd | Financial services | 2009 |
| Lisa T Rogers Ltd | Transport & logistics | 2025 |
| Lisa Walsh Coaching Ltd | Other services | 2026 |
| Lissie R Properties Ltd | Real estate | 2025 |
| Listen Uplift Vent C.I.C. | Education | 2019 |
| Lite Logistics Limited | Transport & logistics | 2020 |
| Lite-Mart Limited | Wholesale & retail | 2000 |
| Little Aston Hall and Lakeside Limited | Administrative & support | 1995 |
| Little Bull Pubs Limited | Hospitality | 2023 |
| Little Chippy Pizza. Limited | Hospitality | 2018 |
| Little Dessert Shop Walsall Limited | Wholesale & retail | 2024 |
| Little Executives Ltd. | Health & social care | 2026 |
| Little Fi's Kitchen Ltd | Hospitality | 2020 |