| THE House of Excellence for Consultancy & Training Ltd | Education | 2014 |
| THE House Skatepark Ltd | Arts & recreation | 2024 |
| THE HR Experts (UK) Limited | Professional & scientific | 2012 |
| THE Hub S12 Ltd | Health & social care | 2024 |
| THE Human Collab Ltd | Information & communication | 2025 |
| THE Human-Centric Workplace Ltd | Professional & scientific | 2025 |
| THE Hunters Will Find Productions Limited | Information & communication | 2013 |
| THE Ident Castings Ltd | Information & communication | 2025 |
| THE Ilkley Brewery Company Limited | Manufacturing | 2009 |
| THE Inclusive Classroom Ltd | Information & communication | 2026 |
| THE INK N IVY Tattoo Studio Ltd | Arts & recreation | 2026 |
| THE Inspiring Leaders Network Ltd. | Professional & scientific | 2015 |
| THE International Icon Ltd | Information & communication | 2025 |
| THE International Psychology Centre Ltd | Health & social care | 2024 |
| THE Investment Room Limited | Real estate | 2016 |
| THE Italian Kitchen (Sheffield) Ltd | Administrative & support | 2017 |
| THE Jacket Rises Ltd | Arts & recreation | 2023 |
| THE Jacksons Group of Companies Limited | Professional & scientific | 2010 |
| THE Jessops Riverside Management Company Limited | Real estate | 2002 |
| THE JET Miners Inn Great Broughton Ltd | Hospitality | 2026 |
| THE Johnson Walker Partnership Limited | Professional & scientific | 2005 |
| THE Joinery Shop Limited | Construction | 2001 |
| THE Joint Sheff Ltd | Wholesale & retail | 2026 |
| THE Jordan River Foundation | Education | 2005 |
| THE Joseph Stone Educational and Village Hall Charity | Real estate | 2004 |
| THE Journey Centre Limited | Wholesale & retail | 2013 |
| THE K W Academy Ltd | Other services | 2020 |
| THE K-Che Club Limited | Hospitality | 2015 |
| THE Kelham Friar Ltd | Hospitality | 2018 |
| THE Kids Club (SY) Ltd | Health & social care | 2021 |
| THE Kiln Sheff Ltd | Wholesale & retail | 2024 |
| THE Kitchen Bros Ltd | Construction | 2020 |
| THE Kitchen Cutlery Company Limited | Manufacturing | 1923 |
| THE Kitchen Factory Ltd | Other services | 2014 |
| THE Kitchen in the Boat Limited | Hospitality | 2020 |
| THE Kudo Studio Ltd | Information & communication | 2024 |
| THE Kutchenhub Limited | Administrative & support | 2023 |
| THE LAD Corner Ltd | Arts & recreation | 2022 |
| THE Lady in the Bay Window Ltd | Wholesale & retail | 2025 |
| THE Lady Rockingham Company Limited | Manufacturing | 2021 |
| THE Lady Westminster (Bham) Limited | Hospitality | 2021 |
| THE Lahore Cafe - 1 Ltd | Hospitality | 2026 |
| THE Lahore Cafe Ltd | Hospitality | 2026 |
| THE Laidback Home Limited | Professional & scientific | 2018 |
| THE Lakes Property Management and Maintenance Ltd | Construction | 2013 |
| THE Laser Clinic South Yorkshire Limited | Health & social care | 2013 |
| THE Laser Cutting Company Holdings Limited | Financial services | 2020 |
| THE Laser Cutting Company Limited | Manufacturing | 2003 |
| THE Laundry Club Ltd | Other services | 2023 |
| THE Laundry Club Sheff Ltd | Other services | 2026 |
| THE Lawn and Garden Gentlemen Limited | Administrative & support | 2025 |
| THE Lawson Group Health Solutions Ltd | Health & social care | 2023 |
| THE Lawton Arms Church Lawton Ltd | Administrative & support | 2025 |
| THE Leadership Hub Ltd | Professional & scientific | 2012 |
| THE Leadmill Holdings Limited | Arts & recreation | 2008 |
| THE Leadmill Limited | Arts & recreation | 1995 |
| THE Learning Community Limited | Administrative & support | 2003 |
| THE Learning Studio Education Centre Ltd | Education | 2019 |
| THE LEE International Trading Company Ltd | Wholesale & retail | 2013 |
| THE Legal Alliance Limited | Administrative & support | 2006 |
| THE Legendary Music Company Ltd | Professional & scientific | 2025 |
| THE Letting Company UK Ltd | Real estate | 2005 |
| THE Lettings Boutique Ltd | Real estate | 2026 |
| THE Lettings Room Limited | Real estate | 2009 |
| THE Life of MR T Limited | Information & communication | 2024 |
| THE Light of Purity Limited | Professional & scientific | 2025 |
| THE Lighterman's Delight Ltd | Hospitality | 2023 |
| THE Lighting and Power Group Limited | Financial services | 2016 |
| THE Lighting Village Ltd | Financial services | 2021 |
| THE Link Community Services Limited | Health & social care | 2016 |
| THE Little Acorn Education Company Limited | Education | 2008 |
| THE Little London Office Park Partnership | | 1990 |
| THE Little Sausage Shop Limited | Wholesale & retail | 2026 |
| THE Little VET Company Limited | Professional & scientific | 2024 |
| THE Little Yorkshire Speech Co. Ltd | Health & social care | 2026 |
| THE Local Hospitality Ltd | Hospitality | 2025 |
| THE Lockup Escape Rooms Ltd | Arts & recreation | 2017 |
| THE Lodge Health Care Limited | Health & social care | 2007 |
| THE Lodge Owners Limited | Households | 2023 |
| THE Loft -Face.Body &Soul Ltd | Other services | 2024 |
| THE LOG Shop Limited | Wholesale & retail | 2015 |
| THE Lombardy Directive Ltd | Real estate | 2020 |
| THE London Bond Exchange Limited | Administrative & support | 2024 |
| THE London Bond Market Limited | Administrative & support | 2024 |
| THE Lord’S School of Dance Ltd | Arts & recreation | 2020 |
| THE Lost Line Ltd | Professional & scientific | 2020 |
| THE Lotter Limited | Professional & scientific | 2007 |
| THE Lovely Catering Company Limited | Hospitality | 2014 |
| THE Lovely Works Productions Ltd | Real estate | 2021 |
| THE Lower Norwood Co-Operative Building Company Limited | Real estate | 1862 |
| THE Loxley Company Ltd | Other services | 2023 |
| THE Lumination Game Limited | Professional & scientific | 2019 |
| THE Lunniagh Partnership Limited | Professional & scientific | 2013 |
| THE Magee Partnership Limited | Administrative & support | 2026 |
| THE Magic Leaf Ltd | Wholesale & retail | 2021 |
| THE MAN About Townhead Limited | Information & communication | 2017 |
| THE Management Company (Castlegate) Limited | Real estate | 2005 |
| THE Manchester Theatre Company Ltd | Arts & recreation | 2012 |
| THE Mane Club Ltd | Wholesale & retail | 2026 |
| THE Mane Hair & Co. Limited | Other services | 2011 |