| Howells Veterinary Services Limited | Professional & scientific | 2011 |
| Howells VS (Holdings) Limited | Other services | 2019 |
| Hugh Barker Property Ltd | Real estate | 2016 |
| I Tweddell Limited | Education | 2021 |
| IBH Trustees Limited | Financial services | 2020 |
| Icbp Duncombe Limited | Arts & recreation | 2012 |
| IF Cardboard Creations Limited | Manufacturing | 1996 |
| Ilex Healthcare Communications Limited | Professional & scientific | 2022 |
| Impact Safety Solutions Limited | Professional & scientific | 2002 |
| Infinity Pet Crematorium Limited | Other services | 2025 |
| Into the Glade Ltd | Hospitality | 2022 |
| Invicta Bakeware Holdings Limited | Professional & scientific | 2010 |
| Invicta Bakeware Limited | Manufacturing | 1925 |
| J Atkinson Scrap Waste Skips Ltd | Wholesale & retail | 2025 |
| J C Fabrications Limited | Manufacturing | 2002 |
| J F Harley Limited | Construction | 2015 |
| J Johnson Fish Merchants Ltd | Wholesale & retail | 2019 |
| J. a. Glaze Limited | Professional & scientific | 2025 |
| J. Peacock Limited | Professional & scientific | 1999 |
| J.E.S DMH Ltd | Administrative & support | 2024 |
| J.Woolgar Joinery Limited | Construction | 2011 |
| Jackson Intl Ltd | Construction | 2014 |
| James Barraclough Engineering Limited | Manufacturing | 2021 |
| James Greenwood Property Ltd | Real estate | 2025 |
| James Partners 2 Limited | Construction | 2022 |
| James Partners Ltd | Construction | 2020 |
| Jennifer Warburton Legal Ltd | Professional & scientific | 2016 |
| Jeremy Tasker Healthcare Consultancy Limited | Professional & scientific | 2019 |
| JMJ Steel & Cladding Limited | Construction | 2026 |
| John Skaife Limited | Water & waste | 2008 |
| Jonathan Dring Ltd | Wholesale & retail | 2002 |
| JT Controls Industrial Automation Ltd | Manufacturing | 2025 |
| Just Dunnett Ltd | Professional & scientific | 2018 |
| K & S Holdings (Yorkshire) Limited | Real estate | 2001 |
| Kartec (Northern) Limited | Wholesale & retail | 2006 |
| KB Food 1 Ltd | Hospitality | 2025 |
| KDM Solutions Ltd | Manufacturing | 2012 |
| Kleenbinz Ltd | Extraterritorial | 2011 |
| LC 888 Limited | Hospitality | 2025 |
| Lea's Farm Ltd | Agriculture & fishing | 2020 |
| Lease Rigg Fort Company Limited | Financial services | 2020 |
| Lease Rigg Fort Investments Limited | Financial services | 2020 |
| Lecb Property Ltd | Real estate | 2024 |
| Lengdata Services Limited | Information & communication | 2007 |
| Light Walls Ltd | Manufacturing | 2020 |
| Little Puddings Nurseries Ltd | Education | 2025 |
| Lizzie Simpson Limited | Information & communication | 2021 |
| Local Crystal Ltd | Wholesale & retail | 2024 |
| Longmire and Vance Limited | Professional & scientific | 2021 |
| Luchshiy Limited | Real estate | 2023 |
| Lumisphere Products Ltd. | Manufacturing | 1989 |
| Luna Steel Projects Limited | Construction | 2019 |
| Lwcw Properties Limited | Real estate | 2024 |
| M R Clough Ltd | Wholesale & retail | 2024 |
| M&M Motors Property (Egton) Ltd | Real estate | 2023 |
| Magson Feeds & Country Store Ltd | Wholesale & retail | 2026 |
| Maison Blake Ltd | Real estate | 2025 |
| MAL Joinery Ltd | Construction | 2015 |
| Malton Office Centre Ltd | Real estate | 2017 |
| Malton Plastics (UK) Limited | Manufacturing | 2000 |
| Malton Storage Ltd | Real estate | 2017 |
| Mark Stephenson Services Limited | Transport & logistics | 2015 |
| Marksmen's Hideout Ltd | Arts & recreation | 2024 |
| Marshe Properties Ltd | Real estate | 2023 |
| Mason Masters Limited | Construction | 2014 |
| Mathewsons Classic Cars Ltd | Wholesale & retail | 2021 |
| Mathewsons Competitions Ltd | Wholesale & retail | 2026 |
| Matthams Consultancy Limited | Professional & scientific | 2022 |
| Matthew MAW - Removals and Storage Limited | Transport & logistics | 2002 |
| MBK Bookkeeping Consultancy Ltd | Professional & scientific | 2020 |
| Meadow Project Management Limited | Professional & scientific | 2023 |
| Megandan Limited | Real estate | 2021 |
| Melodic Moose Ltd | Wholesale & retail | 2020 |
| MG Leisure Developments Limited | Administrative & support | 2009 |
| MGL Homes Ltd | Construction | 2005 |
| Mill Farm Minerals Ltd | Other services | 2012 |
| Mill House Freehold Ltd | Real estate | 2015 |
| Minerva (Yorkshire) Ltd | Real estate | 2024 |
| MO MO Architecture Limited | Professional & scientific | 2005 |
| Moneyweb 123 Limited | Financial services | 2013 |
| Moorland ATV Ltd | Wholesale & retail | 2009 |
| Moors Cottages Limited | Hospitality | 2021 |
| Moorsbus Community Interest Company | Transport & logistics | 2014 |
| Morton Direct Ltd | Transport & logistics | 2023 |
| MOT Engineering Services Ltd | Professional & scientific | 2026 |
| Mote Rallysport Ltd | Arts & recreation | 2025 |
| Muddy Milk Ltd | Professional & scientific | 2025 |
| N a C & C Cousins Ltd | Construction | 2008 |
| N E Autos Ltd | Wholesale & retail | 2005 |
| Namaste Bengal Pickering Ltd | Hospitality | 2023 |
| National Organisation of Beaters and Pickers UP Ltd | Other services | 2005 |
| Nelson Flats Limited | Extraterritorial | 1984 |
| New Start 23 Limited | Administrative & support | 2023 |
| Newbiggin Hall Farm Ltd | Mining & quarrying | 2012 |
| Newbiggin Hall Ltd | Mining & quarrying | 2012 |
| Nick Abbey Digital Agriculture Ltd | Wholesale & retail | 2019 |
| Norman & Gray Ltd | Manufacturing | 2014 |
| North Yorkshire Joinery Ltd | Manufacturing | 2019 |
| North Yorkshire Pest Solutions Ltd | Administrative & support | 2023 |
| North Yorkshire Property Holdings Ltd | Households | 2016 |