| Harrogate Steel Company Limited | Manufacturing | 2016 |
| HB Prestige Limited | Wholesale & retail | 2019 |
| Heritage Engineering North West Limited | Manufacturing | 2010 |
| Heron Inns Limited | Hospitality | 2014 |
| HLF Trading Limited | Wholesale & retail | 2012 |
| HYC Engineering Ltd | Construction | 2023 |
| Hydro Autos Ltd | Wholesale & retail | 2018 |
| I Wanna Be...Role Play Village Ltd | Arts & recreation | 2018 |
| IL Rustico Ltd | Hospitality | 2021 |
| Insulating Windows Limited | Manufacturing | 2007 |
| Inverasdale Ltd | Transport & logistics | 2022 |
| Isaac Carew Ltd | Administrative & support | 2016 |
| Italio Limited | Hospitality | 2014 |
| Itus Security Solutions Ltd | Administrative & support | 2013 |
| J 9 Enterprises Limited | Wholesale & retail | 2014 |
| J and M IT Solutions Limited | Information & communication | 2011 |
| J Davey Occupational Therapy Ltd | Health & social care | 2019 |
| J J Building Services Ltd | Construction | 2014 |
| J Robertson Building Contractors Ltd | Construction | 2016 |
| J. Boyer and SON Limited | Construction | 2008 |
| J.M.E.F Solutions Ltd | Professional & scientific | 2013 |
| Jadereign Ltd | Transport & logistics | 2019 |
| Jaypedd Tech Limited | Information & communication | 2014 |
| Jeff Morgan & Sons Limited | Wholesale & retail | 2011 |
| Jemmalou Ltd | Hospitality | 2018 |
| Jess FOX and Hound Ltd | Other services | 2023 |
| Jewel Windows Limited | Construction | 2009 |
| Joco Interiors Limited | Wholesale & retail | 2017 |
| Jollyfeat Ltd | Transport & logistics | 2019 |
| Jordans 2014 Ltd | Transport & logistics | 2014 |
| JP Ryan Consultants Limited | Manufacturing | 2010 |
| JP Stewart Ltd | Administrative & support | 2011 |
| JPC Construction IOW Ltd | Construction | 2021 |
| Julienne Marie's Company Limited | Health & social care | 2014 |
| Jully Investments Limited | Real estate | 2026 |
| Justmaverick Records Ltd | Information & communication | 2024 |
| Kabel Electro Limited | Manufacturing | 1989 |
| Kafecz Trans Ltd | Manufacturing | 2018 |
| Keiron Perry by Design Limited | Construction | 2016 |
| Kelsall Windows Building Services Limited | Construction | 2014 |
| Ki-Technology Consultants Limited | Information & communication | 2011 |
| Kiddyum Limited | Manufacturing | 2011 |
| Kids App Ltd | Education | 2014 |
| Kirk Signs Limited | Manufacturing | 1999 |
| Kismet Balti House Ltd | Hospitality | 2016 |
| Klein & Wallace Ltd | Wholesale & retail | 2017 |
| KMR Construction Limited | Construction | 2014 |
| Kobolddust Ltd | Transport & logistics | 2019 |
| Kyark Limited | Other services | 2018 |
| L & M Building & Design Limited | Construction | 2021 |
| L H P Electrical Ltd | Other services | 2014 |
| L.P Autos Ltd | Wholesale & retail | 2020 |
| Laagha's Ltd | Hospitality | 2017 |
| Laknerra Ltd | Transport & logistics | 2019 |
| Lamas Cars Limited | Wholesale & retail | 2018 |
| Lamwinns Ltd | Transport & logistics | 2019 |
| Langleys Kent Ltd | Wholesale & retail | 2018 |
| Lapo Retail Limited | Transport & logistics | 2013 |
| Lara Boot Hairdressing Limited | Other services | 2010 |
| Lartington Ltd | Transport & logistics | 2021 |
| LAS Building Services Ltd | Construction | 2010 |
| Lata Lata Ltd | Hospitality | 2017 |
| Lawrence Property Services Ltd | Construction | 2014 |
| LDR Creative Communications Limited | Professional & scientific | 2005 |
| Leafcome Ltd | Transport & logistics | 2019 |
| Lean Training Club Ltd | Education | 2017 |
| Leka London Ltd | Other services | 2016 |
| Leonard Forklift Truck Attachments Limited | Manufacturing | 2012 |
| Lewdeck Ltd | Wholesale & retail | 2017 |
| Lewtech Limited | Manufacturing | 2017 |
| Lilac Theatre Dance Ltd | Arts & recreation | 2013 |
| Lillies Fashions ( UK ) Ltd | Wholesale & retail | 2013 |
| Lillywhite Facilities Ltd | Administrative & support | 2022 |
| Little and Wainwright Limited | Hospitality | 2015 |
| Llewellyn Ltd | Administrative & support | 2008 |
| London & Herts Sash Windows Limited | Construction | 2015 |
| Lotus Consulting Ltd | Administrative & support | 2023 |
| Love Music Tours Limited | Arts & recreation | 2017 |
| Lowe Riser POD Limited | Manufacturing | 2010 |
| Lowes Lyons Limited | Information & communication | 2014 |
| LSG Litho Limited | Information & communication | 2013 |
| Lucywiley Ltd | Transport & logistics | 2019 |
| Lumenlinks Ltd | Wholesale & retail | 2015 |
| Luxe Events & Productions Limited | Arts & recreation | 2009 |
| Lyvinore Ltd | Transport & logistics | 2019 |
| M Bubb Construction Ltd | Construction | 2017 |
| M.S.Freeman Plumbing & Heating Limited | Construction | 2017 |
| Machha Ltd | Hospitality | 2017 |
| Mackavelli Kitchen Ltd | Hospitality | 2019 |
| Madtel Commercial Services Ltd | Professional & scientific | 2019 |
| Magiccreampuff Ltd | Transport & logistics | 2019 |
| Maisonco Ltd | Construction | 2021 |
| Majestic Coffee Limited | Hospitality | 2012 |
| Majestic Vending Limited | Wholesale & retail | 2020 |
| MAL IT Consultancy Limited | Information & communication | 2015 |
| Mallindine Associates Ltd | Professional & scientific | 2004 |
| Malton Coach & BUS Limited | Manufacturing | 2005 |
| Manchester Aesthetics Clinic Ltd | Health & social care | 2015 |
| Marble Corporation Ltd | Wholesale & retail | 2018 |
| March Coffee Limited | Hospitality | 2021 |