| Highmoor Bloodhounds Ltd | Agriculture & fishing | 2013 |
| Highwood Invesco Limited | Professional & scientific | 2021 |
| Hiila Ltd | Wholesale & retail | 2023 |
| Hillmoore Joinery Site Services Limited | Construction | 2014 |
| HM Beachell Ltd | Agriculture & fishing | 2003 |
| HNS Publishing Limited | Information & communication | 2015 |
| Hodgson Management Ltd | Professional & scientific | 2012 |
| Hoetech Windows Limited | Construction | 2008 |
| Holborn Technology Investments Limited | Administrative & support | 2014 |
| Holderness Agri Hire Limited | Agriculture & fishing | 2018 |
| Holderness Homes Limited | Construction | 2022 |
| Holtby Construction Ltd | Manufacturing | 2020 |
| Holte Developments Limited | Construction | 1999 |
| Home Shield Property Maintenance Ltd | Construction | 2024 |
| Honest Bean Co Limited | Administrative & support | 2018 |
| Hopwood Farming | Agriculture & fishing | 2011 |
| Hornsby Ltd | Construction | 2017 |
| Horsewold Farms Limited | Agriculture & fishing | 2004 |
| Housewares Direct Limited | Extraterritorial | 2003 |
| HSR Agri Ltd | Agriculture & fishing | 2023 |
| Hudgell Consulting Ltd | Administrative & support | 2024 |
| Hughes & Co Lettings Limited | Households | 2023 |
| Hull JAM Factory CIC | Education | 2024 |
| Hull Jets Limited | Arts & recreation | 2024 |
| Hull Rugby Union Football Club Limited | Arts & recreation | 2009 |
| Humber Cranes Limited | Manufacturing | 2015 |
| Humberston Motors Limited | Wholesale & retail | 2012 |
| IAN Dowden Marketing Ltd. | Wholesale & retail | 2013 |
| IAN Pick Associates Limited | Professional & scientific | 2006 |
| Icips Limited | Administrative & support | 2013 |
| Imperial Lotus (Northern) Ltd | Wholesale & retail | 2018 |
| Inclusive Events CIC | Arts & recreation | 2024 |
| Independent Financial Appointments Limited | Professional & scientific | 2026 |
| Indi Kitchen Street Food Ltd | Hospitality | 2025 |
| Indigo (Malton) Ltd | Wholesale & retail | 2004 |
| Infragravity Ltd | Agriculture & fishing | 2019 |
| Infrared Systems Ltd | Manufacturing | 2018 |
| Inglis Farming Limited | Agriculture & fishing | 2017 |
| Innes Agency Ltd | Professional & scientific | 2022 |
| Innovate Agri Limited | Agriculture & fishing | 2019 |
| Inscape Living Limited | Real estate | 2025 |
| Institute for Continuous Improvement in Public Services | Education | 2012 |
| Interlock Training Ltd | Education | 2022 |
| International Pallet Supplies Limited | Transport & logistics | 2001 |
| Irkadap Ltd | Health & social care | 2006 |
| Isolo Solutions Limited | Real estate | 2018 |
| IT Related Ltd | Administrative & support | 2001 |
| It's Just Concrete Ltd | Construction | 2024 |
| IVY Tyres Ltd | Wholesale & retail | 2016 |
| J a FRY Limited | Agriculture & fishing | 2013 |
| J and J Digital Ltd | Wholesale & retail | 2025 |
| J and J Goodwill Services Limited | Professional & scientific | 2024 |
| J B Fuels Limited | Wholesale & retail | 2002 |
| J B Technical Solutions Limited | Professional & scientific | 2008 |
| J Barker Electrical Ltd | Construction | 2021 |
| J Bristow GAS, Heating & Plumbing Services Ltd | Construction | 2023 |
| J Caley Kitchens & Joinery Ltd | Manufacturing | 2011 |
| J G Evison Limited | Agriculture & fishing | 2016 |
| J H Farming Limited | Agriculture & fishing | 2008 |
| J Minns Properties (Yorkshire) Limited | Real estate | 2019 |
| J Westfield | Real estate | 2019 |
| J. C. Jackson and SON Limited | Agriculture & fishing | 2005 |
| J. Foley Electrical Ltd | Construction | 2024 |
| J. R. Hood Limited | Transport & logistics | 1998 |
| J. Scott Engineering Limited | Manufacturing | 1985 |
| J.Denham Site Services Ltd | Professional & scientific | 2026 |
| J.E. Cottingham Limited | Agriculture & fishing | 2010 |
| J.K.B.Megginson & Sons Limited | Agriculture & fishing | 1964 |
| J.K.N. Polymers Limited | Manufacturing | 1993 |
| JA & WA Proctor Limited | Agriculture & fishing | 2002 |
| Jacss Ltd | Professional & scientific | 2012 |
| Jakes Good Will Limited | Households | 2022 |
| James Mortimer,Limited | Agriculture & fishing | 1927 |
| Jamie Gledhill Limited | Extraterritorial | 2006 |
| Jane Gray Eyecare Limited | Health & social care | 2014 |
| Jask Property Development Limited | Real estate | 2026 |
| Jason Webb AB Limited | Real estate | 2008 |
| JBW Drainage Ltd | Administrative & support | 2023 |
| Jeffersons (Electrical Contractors) Ltd | Construction | 2024 |
| Jell Property Limited | Real estate | 2025 |
| JEM Build Limited | Construction | 2010 |
| JEM Developments Limited | Construction | 2013 |
| JGH Promotions Limited | Arts & recreation | 2017 |
| JH Construction Services Limited | Administrative & support | 2017 |
| JH Trees Ltd | Agriculture & fishing | 2026 |
| Jixiang Ruyi (Driffield) Ltd | Hospitality | 2026 |
| JKB Consult Limited | Professional & scientific | 2025 |
| Jlmjaj | Professional & scientific | 2015 |
| JMS Vehicles Ltd | Wholesale & retail | 2026 |
| JNI Transport Ltd | Transport & logistics | 2021 |
| Joanne Coates Ltd | Other services | 2023 |
| John Duggleby Homes Limited | Construction | 2000 |
| John W Joyce Engineering Limited | Professional & scientific | 1999 |
| JP & SA Properties Ltd | Construction | 2021 |
| Jplb Holdings Limited | Professional & scientific | 2025 |
| JR Auto Solutions Ltd | Wholesale & retail | 2025 |
| JSB Estates Ltd | Real estate | 2021 |
| JT Rural Limited | Agriculture & fishing | 2025 |
| JT Web Development Ltd | Information & communication | 2015 |
| Jusnatandale Limited | Professional & scientific | 2011 |