| Helnika Limited | Information & communication | 2007 |
| Hemingford Specialist Interim Management Ltd | Administrative & support | 2003 |
| Henko Labs Limited | Administrative & support | 2018 |
| Henry Walker (Retail) Limited | Extraterritorial | 1995 |
| Henton Court Management Company Limited | Households | 2008 |
| Heritage Transport Restoration and Supplies Ltd | Manufacturing | 2006 |
| HI Bargains Limited | Wholesale & retail | 2023 |
| HI-5 Fireworks Limited | Wholesale & retail | 2007 |
| Hi-Tech Embroiders Limited | Manufacturing | 1998 |
| High Orbit Limited | Professional & scientific | 2006 |
| High Performance Swimming Limited | Arts & recreation | 1998 |
| Highfield Court (Earl Shilton) Limited | Households | 2000 |
| Highfields Seeds Limited | Agriculture & fishing | 2001 |
| Highgate Plastics Limited | Manufacturing | 2002 |
| Highline Adventure Ltd | Arts & recreation | 2021 |
| Highway Maintenance Specialists Limited | Wholesale & retail | 1998 |
| Hilmarco Limited | Agriculture & fishing | 1950 |
| Hinckley Club for Young People Limited | Other services | 2010 |
| Hinckley Leisure Group Limited | Financial services | 2026 |
| Hinckley Mencap Limited | Wholesale & retail | 1994 |
| Hinckley Turf Supplies Limited | Construction | 2006 |
| HJG Enterprises Limited | Professional & scientific | 2013 |
| HLD GOC Limited | Financial services | 2014 |
| HLD Group of Companies Limited | Financial services | 2022 |
| HLD Number 120 Limited | Financial services | 2024 |
| HLD Number 130 Limited | Financial services | 2024 |
| HLD Number 40 Limited | Financial services | 2023 |
| HLD Number 70 Limited | Financial services | 2023 |
| HLD Sandtoft Limited | Financial services | 2015 |
| HMC - the Heads' Conference | Education | 1909 |
| Hockey Factory Shop Ltd | Wholesale & retail | 2004 |
| Hodges & Drake Design Limited | Professional & scientific | 2004 |
| Holiday Lounge Limited | Administrative & support | 2003 |
| Hollington Investments Ltd | Real estate | 2023 |
| Holly Harriman Limited | Professional & scientific | 2026 |
| Hollycroft Software Limited | Information & communication | 2002 |
| Home Care Building Services (Leicester) Limited | Construction | 2025 |
| Home Furnishings & Fixings Ltd | Construction | 2025 |
| Home Matters Services Limited | Financial services | 2004 |
| Home-Start South Leicestershire | Health & social care | 2004 |
| Hopscotch Playgroup Co-Operative C.I.C. | Education | 2006 |
| Horizon Education Limited | Professional & scientific | 2001 |
| Hoseforma Limited | Manufacturing | 1980 |
| Houghton Grace Limited | Real estate | 2003 |
| HS Corporate Finance Ltd. | Financial services | 2006 |
| HS Estates Ltd | Real estate | 2006 |
| Hughes Design & Construction Services Ltd | Construction | 2003 |
| Hunsbury Hill Limited | Manufacturing | 2000 |
| Hörmann (U.K.) Limited | Manufacturing | 1979 |
| I D Haulage Limited | Transport & logistics | 2006 |
| I&Y Vapes Ltd | Wholesale & retail | 2023 |
| I-Sub Digital Limited | Manufacturing | 2005 |
| I.D.M.Solutions Limited | Professional & scientific | 2004 |
| IAN Highton Limited | Administrative & support | 2007 |
| IBD Wigston Ltd | Wholesale & retail | 2025 |
| Ibstock Brick Aldridge Limited | Financial services | 1958 |
| Ibstock Brick Cattybrook Limited | Financial services | 1877 |
| Ibstock Brick Himley Limited | Financial services | 1907 |
| Ibstock Brick Leicester Limited | Financial services | 1909 |
| Ibstock Brick Limited | Manufacturing | 1899 |
| Ibstock Brick Nostell Limited | Financial services | 1954 |
| Ibstock Brick Roughdales Limited | Financial services | 1958 |
| Ibstock Bricks (1996) Limited | Financial services | 1930 |
| Ibstock Community Enterprises Limited | Other services | 1996 |
| Ibstock Group Limited | Professional & scientific | 1970 |
| Ibstock Westbrick Limited | Financial services | 1982 |
| Icon Audio (UK) Limited | Manufacturing | 2006 |
| Iconic Supply Collective Ltd | Wholesale & retail | 2026 |
| ICP Cleaning Supplies Limited | Wholesale & retail | 2007 |
| Imagine Inflatables Limited | Manufacturing | 2001 |
| Imkemex Limited | Information & communication | 1978 |
| Impact Foiling Limited | Manufacturing | 2000 |
| Impact International (Europe) Limited | Professional & scientific | 2005 |
| In-Line Containers Limited | Manufacturing | 1995 |
| Industrial Medical Supplies (Lutterworth) Limited | Health & social care | 2003 |
| Industrial Silencers Limited | Manufacturing | 2008 |
| Infinity Park Derby Management Limited | Real estate | 2016 |
| Infosight Consulting Group Ltd | Information & communication | 2006 |
| Infotec Services Limited | Professional & scientific | 2002 |
| Infoteknix Systems Limited | Information & communication | 1994 |
| Infrastructure Project Financial Analysis Limited | Professional & scientific | 2003 |
| Inner Compass Ltd | Education | 2012 |
| Integra Accounting Limited | Professional & scientific | 2005 |
| Inter NET Supplies Limited | Information & communication | 1996 |
| Interimconsult Ltd | Professional & scientific | 2020 |
| International Federation of Professional Aromatherapists | Other services | 2002 |
| Intertrans 148 Limited | Other services | 1983 |
| Intimate Apparel Retail UK Limited | Wholesale & retail | 2020 |
| Ipex Properties Limited | Real estate | 2002 |
| Ironstyles Limited | Manufacturing | 1974 |
| Islander Managment Limited | Hospitality | 2002 |
| Isolution Properties Limited | Real estate | 2018 |
| Issano Limited | Hospitality | 2018 |
| IST Power Limited | Manufacturing | 1991 |
| Ital Marb Prop Company Limited | Real estate | 2019 |
| Ivanhoe Hair Studio Limited | Other services | 2007 |
| J & P Supplies (UK) Limited | Wholesale & retail | 2006 |
| J F Harrington & SON Limited | Construction | 2000 |
| J G Pickard Ltd | Construction | 2006 |
| J H J Racing Team Limited | Professional & scientific | 2006 |