| GSW (UK) Ltd | Professional & scientific | 2007 |
| GT Engineering Solutions Limited | Construction | 2023 |
| GTF Pensions Executive Search Ltd | Professional & scientific | 2010 |
| GTF Solutions Ltd | Professional & scientific | 2010 |
| H Creative Services Ltd | Professional & scientific | 2019 |
| H Haywood and SON Limited | Agriculture & fishing | 2016 |
| H&F Capital Investments Ltd | Real estate | 2023 |
| Haines Wiping Products Limited | Manufacturing | 2012 |
| Hair Amore Limited | Other services | 2022 |
| Hair at NO. 11 (Melton Mowbray) Limited | Other services | 2019 |
| Hair by Vicky Smith Ltd | Other services | 2022 |
| Halko Cash and Carry Ltd | Wholesale & retail | 2022 |
| Hall Farm Cuisine Limited | Hospitality | 2022 |
| Hallmark Consumer Property Limited | Real estate | 2013 |
| Hambleton TEC Ltd | Construction | 2024 |
| Hamblins Residential Surveying Ltd | Professional & scientific | 2024 |
| Hamilton Developments (Melton Mowbray) Limited | Construction | 2003 |
| Hamton Properties Limited | Real estate | 1996 |
| Hanover National (Holdings Developments) Limited | Real estate | 1995 |
| Hanwell Wine Estate Limited | Agriculture & fishing | 2019 |
| Happy Caravan Company Ltd | Manufacturing | 2018 |
| Happy Dog Marketing Ltd | Professional & scientific | 2021 |
| Harboro Hotel (East Midlands) Ltd | Hospitality | 2012 |
| Harborough Holdings Limited | Manufacturing | 2018 |
| Harborough Portas (Holdings) Limited | Financial services | 2019 |
| Harborough Portas Limited | Financial services | 1983 |
| Harby Agriculture Limited | Water & waste | 2005 |
| Harby Manufacturing Limited | Financial services | 2021 |
| Hardibar Ltd | Professional & scientific | 2007 |
| Harefield Close Management Company Limited | Households | 2021 |
| Harnan Forestry Ltd | Agriculture & fishing | 2025 |
| Harp Gardens Limited | Water & waste | 2025 |
| Harrison West Ltd | Professional & scientific | 2021 |
| Harrison X Ltd | Administrative & support | 2024 |
| HAT Events Limited | Hospitality | 2025 |
| Haven Business Associates Limited | Education | 2018 |
| Hawc Bearings Ltd | Professional & scientific | 2019 |
| Hawkesbury Advisory Limited | Professional & scientific | 2025 |
| Hawklean Limited | Administrative & support | 2025 |
| Hazard Contracting Limited | Agriculture & fishing | 2011 |
| HB 5 Group Limited | Real estate | 2019 |
| HD Property Holdings Ltd | Real estate | 2025 |
| Health and Happiness Lifestyle Limited | Arts & recreation | 2020 |
| Health Image Limited | Health & social care | 2016 |
| Hear Clear Hearing Care Limited | Health & social care | 2017 |
| Heart LED Psychotherapy Ltd | Administrative & support | 2017 |
| Heart Trees Heavy Horses Ltd | Agriculture & fishing | 2025 |
| Heddon Valley Limited | Real estate | 2023 |
| Hedley and Hall Ltd | Wholesale & retail | 2026 |
| Heidi Simms Accounting Solutions Ltd | Professional & scientific | 2024 |
| Helen Johnson Consulting Limited | Professional & scientific | 2002 |
| Helio Technology Limited | Information & communication | 2021 |
| Henderson Mackenzie Ltd | Professional & scientific | 2011 |
| HER D’Arcy Limited | Manufacturing | 2026 |
| Hercock Holdings Limited | Financial services | 2020 |
| Heritage Building & Construction Limited | Construction | 2008 |
| Heritage Damp Proofing Ltd | Construction | 2005 |
| Heritage Interactive Ltd | Wholesale & retail | 2010 |
| Heritage Lime Plastering Limited | Construction | 2020 |
| Heritage Probuild Ltd | Construction | 2014 |
| Heyday Classic Motorcycles Limited | Wholesale & retail | 2010 |
| HFG Photography Limited | Professional & scientific | 2018 |
| HHG Business Services Ltd | Professional & scientific | 2006 |
| HI Cross Property Ltd | Real estate | 2025 |
| Higgidy Limited | Extraterritorial | 1976 |
| Higgins Home Help Ltd | Administrative & support | 2025 |
| Higgscroft Limited | Agriculture & fishing | 2024 |
| Hill & Menhennet Limited | Real estate | 1972 |
| Hill Top Farm Shop and Cafe Limited | Wholesale & retail | 2021 |
| Hilltopp Limited | Real estate | 2025 |
| Hireitco Ltd. | Administrative & support | 2017 |
| HIX Pilates & Wellness Ltd | Education | 2023 |
| HM Building Services Limited | Construction | 2019 |
| Hobills Limited | Agriculture & fishing | 1987 |
| Hoby Developments Limited | Financial services | 2020 |
| Hodgson & Hodgson Limited | Extraterritorial | 1915 |
| Hoermann Equine Limited | Professional & scientific | 2012 |
| Hogan Outdoors Ltd | Wholesale & retail | 2025 |
| Hogarth Mediation and Training Ltd | Professional & scientific | 2022 |
| Hoistmasters Limited | Manufacturing | 2014 |
| Holistic Care Associates Ltd | Health & social care | 2019 |
| Hollick Housing and Development Limited | Construction | 2020 |
| Holwell Homes Limited | Real estate | 2022 |
| Holwell Property Management Limited | Construction | 2009 |
| Holwell Rifle Club | Arts & recreation | 2022 |
| Holygate Limited | Arts & recreation | 2009 |
| Homely House Rentals Limited | Real estate | 2019 |
| Homes 21 Limited | Wholesale & retail | 2010 |
| Homes for Ukraine Limited | Hospitality | 2022 |
| Homesure Installations Ltd | Construction | 2008 |
| Hometown Residential Limited | Households | 2024 |
| Homewood Residential Lettings Limited | Real estate | 2013 |
| Hoop Lime Ltd | Construction | 2007 |
| Hooperhood Holdings Ltd | Professional & scientific | 2023 |
| HOP Inn Limited | Wholesale & retail | 2012 |
| HOPCO500 Limited | Manufacturing | 2026 |
| Hope Takeaway Ltd | Hospitality | 2017 |
| Hopeberry Care Ltd | Health & social care | 2021 |
| Horgan Consulting Ltd | Construction | 2018 |
| Hot Blooded Kitchens Limited | Hospitality | 2017 |