| Interhearing Ltd | Health & social care | 2013 |
| International Telecommunications Limited | Information & communication | 2006 |
| International Walking Football Federation Ltd | Arts & recreation | 2021 |
| Interpersonnel (HR) Limited | Administrative & support | 1996 |
| Interpower Power Systems Limited | Professional & scientific | 2002 |
| INVIGORATE4U Ltd | Arts & recreation | 2025 |
| Invisible Dust Limited | Arts & recreation | 2010 |
| Iparcelbox Ltd | Manufacturing | 2018 |
| Ipoddoctor Limited | Information & communication | 2007 |
| Ipoddoctor Repairs Limited | Other services | 2007 |
| IPS Distributions Ltd | Wholesale & retail | 2025 |
| Irelan Healthcare Ltd | Health & social care | 2024 |
| Irelink Limited | Wholesale & retail | 2022 |
| Irespite Limited | Hospitality | 2025 |
| Irton Investments Limited | Extraterritorial | 2014 |
| Irtonville IT Services Ltd | Information & communication | 2021 |
| ISM Engineering (North Yorkshire) Limited | Construction | 2016 |
| IT Solutions Yorkshire Ltd | Information & communication | 2023 |
| IT Works Media Ltd | Professional & scientific | 2012 |
| Italian ACC Ltd | Wholesale & retail | 2025 |
| ITD (Fire) Limited | Extraterritorial | 2025 |
| ITD (Yorkshire) Limited | Professional & scientific | 2010 |
| Ithavoll Limited | Professional & scientific | 2016 |
| Itsol Managed Services Limited | Information & communication | 2016 |
| IVY Coast Ltd | Administrative & support | 2017 |
| IWD Media Solutions Limited | Information & communication | 2007 |
| IWE Services Limited | Construction | 2011 |
| J & D Accountants Limited | Professional & scientific | 2012 |
| J & M Nails 19 Ltd | Other services | 2026 |
| J a Buck Limited | Construction | 2021 |
| J a Driving Tuition Limited | Education | 2002 |
| J a Khan Limited | Health & social care | 2019 |
| J a Small General Building Limited | Construction | 2025 |
| J Briggs Electrical Services Ltd | Construction | 2022 |
| J Briggs Property’S Ltd | Real estate | 2021 |
| J C Blackwell Group Ltd | Construction | 2023 |
| J C Property Services Limited | Construction | 2020 |
| J D Whitaker Ltd | Agriculture & fishing | 2023 |
| J Denton & Sons Ltd | Real estate | 2026 |
| J Felawes & Co Ltd | Real estate | 2019 |
| J H Offshore Ltd | Mining & quarrying | 2022 |
| J L Pigg and Sons Limited | Real estate | 2014 |
| J M Winspear Limited | Wholesale & retail | 2023 |
| J Murden Ltd | Hospitality | 2026 |
| J P Properties North Limited | Construction | 2021 |
| J T Winkfield Trading Limited | Administrative & support | 2024 |
| J W & H M Graham Ltd | Agriculture & fishing | 2012 |
| J W Consultancy North West Limited | Professional & scientific | 2017 |
| J W Myers Memorials (Scarborough) Ltd | Wholesale & retail | 2018 |
| J Walmsley Ltd | Professional & scientific | 2018 |
| J&E Bars Limited | Hospitality | 2025 |
| J&J Driveways Ltd | Construction | 2022 |
| J. Archer Property Ltd | Real estate | 2025 |
| J.E.G Hire Limited | Administrative & support | 2009 |
| J.E.G Plant Limited | Wholesale & retail | 2015 |
| J.H.Sinclair & Co.Limited | Wholesale & retail | 1962 |
| J.V.Sleightholme Limited | Agriculture & fishing | 1958 |
| J.W. Joinery Limited | Construction | 2003 |
| J3PSO Developments Limited | Construction | 2022 |
| J3PSO Ltd | Construction | 2015 |
| Jack Bonzo Limited | Construction | 2021 |
| Jackbury Enterprises Limited | Wholesale & retail | 2010 |
| Jackie Smith Limited | Administrative & support | 2022 |
| Jada Hospitality Ltd | Hospitality | 2019 |
| Jafimin Ltd | Other services | 2017 |
| Jaks Construction Limited | Construction | 2022 |
| JAM JAR Lounges Limited | Hospitality | 2026 |
| JAM JAR Vehicle Services Limited | Wholesale & retail | 2022 |
| James Daniel Hearn Ltd | Extraterritorial | 2026 |
| James Lockey Film Limited | Information & communication | 2023 |
| Jammin’ Jimmy’S Ltd | Hospitality | 2025 |
| JAT Travel Limited | Administrative & support | 2011 |
| JAW Coffee Ltd | Hospitality | 2025 |
| JB & DB Holdings Limited | Financial services | 2022 |
| JB Endoscopy Limited | Health & social care | 2022 |
| JBL Global Leisure Ltd | Wholesale & retail | 2017 |
| JBL Leisure Limited | Arts & recreation | 2005 |
| JBR Property Rentals Limited | Real estate | 2025 |
| JBS PUB Company Ltd | Hospitality | 2023 |
| JC Fishing Ltd | Agriculture & fishing | 2018 |
| JC Holdings (Scarborough) Ltd | Real estate | 2021 |
| JCD Children's Homes Limited | Health & social care | 2025 |
| JCS Tyres Ltd | Wholesale & retail | 2025 |
| JDC Decorations Domestic Ltd | Construction | 2013 |
| JDC Decorations Ltd | Construction | 2026 |
| JDD MAC Ltd | Financial services | 2025 |
| JDP Steel Erection Limited | Manufacturing | 2021 |
| JDR Office Supplies Ltd | Wholesale & retail | 2015 |
| JED Scaffolding Ltd | Construction | 2022 |
| Jeel Limited | Manufacturing | 2020 |
| Jeewana Limited | Health & social care | 2025 |
| Jenkinson - Kelly Limited | Construction | 2021 |
| Jenkinson Group Limited | Real estate | 2025 |
| Jennings Computer Services Limited | Wholesale & retail | 1997 |
| Jepson Longstaff Midgley Solicitors LLP | | 2012 |
| JF Enterprises (2003) Limited | Hospitality | 2003 |
| JF Supplies Ltd | Wholesale & retail | 2022 |
| Jhupston Limited | Other services | 2016 |
| Jimmy Corrigan's Limited | Financial services | 2009 |
| JJ Quinn Racing Limited | Arts & recreation | 2003 |