| Hancox Taylor Limited | Real estate | 2017 |
| Handover Packs Ltd | Manufacturing | 2025 |
| Handpicked Holiday Limited | Administrative & support | 2022 |
| Hands-On Logistics Consultancy Limited | Professional & scientific | 2006 |
| Hands-On Logistics Ltd | Transport & logistics | 2021 |
| Hang IT UP in Style Ltd | Extraterritorial | 2016 |
| Hani Design Solution Consultants Ltd | Professional & scientific | 2023 |
| Hankin Consultancy Limited | Professional & scientific | 2020 |
| Hannaford Ltd | Professional & scientific | 2021 |
| Happy BEE Services Ltd | Wholesale & retail | 2018 |
| Happy Futures Day Nursery Limited | Other services | 2009 |
| Happy Girl Investments Limited | Professional & scientific | 2010 |
| Happy Griddle Ltd | Hospitality | 2026 |
| Happy Home Cleaning Stroud LLP | | 2017 |
| Happy Life OS Ltd | Information & communication | 2026 |
| Happy Paws Rugby Ltd | Other services | 2021 |
| Happy Soul Coaching & Development Ltd | Other services | 2024 |
| Hapster Haulage Ltd | Transport & logistics | 2011 |
| Harborough Decorators Limited | Construction | 2011 |
| Harborough Lofts Ltd | Construction | 2022 |
| Harby Skin - Beauty Limited | Other services | 2025 |
| Hardwired Coaching UK Limited | Education | 2023 |
| Harefield Court Management Company Limited | Households | 2003 |
| Harjao Consultancy Ltd | Information & communication | 2019 |
| Harley (Winchester) Limited | Real estate | 2007 |
| Haroe Black Rock Limited | Hospitality | 2023 |
| Haroe Porthmadog Ltd | Arts & recreation | 2019 |
| Harris and Sons Builders Ltd | Construction | 1999 |
| Harrison Price Homes Limited | Real estate | 2021 |
| Harrison Trucking Co Limited | Transport & logistics | 2013 |
| Harryphan Limited | Other services | 2026 |
| Hart Home Lettings Limited | Real estate | 2024 |
| Harthouse Transport Limited | Transport & logistics | 2018 |
| Hartswell Property Services Ltd | Households | 2026 |
| Harvest Centre CIC | Information & communication | 2024 |
| Harvest Gate Developments Limited | Real estate | 2025 |
| Harvest Heaven Store Limited | Wholesale & retail | 2025 |
| Harvon Garth Management Company Limited | Households | 2003 |
| Hasstex Limited | Wholesale & retail | 2018 |
| Hatty Bakewell Limited | Manufacturing | 2020 |
| Hauk Finance Ltd | Financial services | 2019 |
| Haus Group Holdings Ltd | Hospitality | 2024 |
| Haven HUE Properties Limited | Real estate | 2025 |
| Hawker & Busby Property Services Ltd | Real estate | 2021 |
| Hawkin & Co Limited | Professional & scientific | 2012 |
| Hay's Hair and Beauty Limited | Other services | 2003 |
| Hayden Law Limited | Professional & scientific | 2022 |
| Hayne Credit Services Ltd | Financial services | 2026 |
| Hazmat Holdings Ltd | Professional & scientific | 2026 |
| HB Architects Limited | Professional & scientific | 1987 |
| HB Developments Rugby Limited | Construction | 2020 |
| HB Garages Limited | Real estate | 2023 |
| HB Laboratories Limited | Manufacturing | 2021 |
| HBA Design Studio Limited | Professional & scientific | 2021 |
| HBL Nicad Batteries (UK) Limited | Professional & scientific | 2003 |
| Hcpt (1980) Ltd | Wholesale & retail | 1980 |
| Hcpt (Hosanna House and Children's Pilgrimage Trust) | Hospitality | 1973 |
| HD Utilities & Civils Ltd | Construction | 2024 |
| Hd-Ux Ltd | Professional & scientific | 2022 |
| HDR Motors Ltd | Transport & logistics | 2025 |
| Head Acoustics UK Ltd | Wholesale & retail | 2014 |
| Head Rest Limited | Transport & logistics | 2006 |
| Head Start Network for Education and Research Ltd | Education | 2026 |
| Headland Express Couriers Ltd | Transport & logistics | 2009 |
| Healingflowers.Life Limited | Wholesale & retail | 2025 |
| Health & Safety Compliance Engineering Limited | Professional & scientific | 2012 |
| Health Nova Limited | Health & social care | 2025 |
| Health Screening Solutions Limited | Health & social care | 2015 |
| Healthcare Associates Ltd | Wholesale & retail | 2025 |
| Healthy Stuff Online Limited | Wholesale & retail | 2013 |
| Heard Finance Limited | Professional & scientific | 2023 |
| Heard Literary Works Limited | Extraterritorial | 2024 |
| Heard Property Investments Limited | Real estate | 2023 |
| Heart of England Air Ambulance Limited | Health & social care | 2025 |
| Heatac Ltd | Construction | 2021 |
| Heatingcare 4 U Ltd | Construction | 2023 |
| Heatsnake Limited | Professional & scientific | 2016 |
| Heavym Limited | Transport & logistics | 2016 |
| Hector's Pizza Limited | Hospitality | 2023 |
| Hedderwick Family LLP | | 2020 |
| Hedgerley Management Ltd | Professional & scientific | 2005 |
| Helium Mortgages Limited | Financial services | 2021 |
| Helix 15 Ltd | Professional & scientific | 2023 |
| Helix Automotive Group Ltd | Wholesale & retail | 2017 |
| Hellosocialclub Limited | Professional & scientific | 2021 |
| Helm Living Limited | Administrative & support | 2023 |
| Helmstead Holdings Ltd | Real estate | 2026 |
| Helpsoccercoach Limited | Arts & recreation | 2023 |
| Hemelryk Consultants Limited | Administrative & support | 2010 |
| Henabel Care Limited | Health & social care | 2018 |
| Hendrina Ltd | Real estate | 2023 |
| Henessy Properties Limited | Real estate | 2026 |
| Hera Lighting UK Ltd | Extraterritorial | 2010 |
| Herbert Andrews Limited | Real estate | 2018 |
| Here on Time UK Ltd | Transport & logistics | 2024 |
| Heritage Air Services Ltd | Manufacturing | 2018 |
| Heritage Property Consultants LLP | | 2008 |
| Hermesz Transport Limited | Administrative & support | 2014 |
| Hermy's Healthcare Services Ltd | Health & social care | 2024 |
| Hertz Electrical Contractors Limited | Construction | 2018 |