| Haldane Consulting Ltd | Information & communication | 2023 |
| Hamilton Lawrence & Associates Limited | Professional & scientific | 2018 |
| Haml Company Limited | Wholesale & retail | 2001 |
| Hanbury Fine Art Limited | Arts & recreation | 2025 |
| Hancoe Cleaning Services Limited | Administrative & support | 2022 |
| Hang 166 Ltd | Hospitality | 2019 |
| Hang About Limited | Arts & recreation | 2020 |
| Hannah Sugarman Ltd | Health & social care | 2023 |
| Hannah-Michelle Ltd | Arts & recreation | 2026 |
| Haplins Limited | Real estate | 2026 |
| Happy Dragon 168 Ltd | Hospitality | 2019 |
| Hardy Construction (Stamford) Limited | Construction | 2018 |
| Hariri Ltd | Hospitality | 2017 |
| Harlow Capital Ltd | Financial services | 2024 |
| Harness Insights Ltd | Professional & scientific | 2024 |
| Harper Marketing Ltd | Extraterritorial | 2024 |
| Harper Resources Limited | Administrative & support | 2025 |
| Harpers Plastering Limited | Construction | 2021 |
| Harris Property Development and Rentals Limited | Real estate | 2021 |
| Harrison Maxwell Limited | Administrative & support | 2003 |
| Harry's Mobile Tyres Limited | Wholesale & retail | 2025 |
| Hartman Contracting Limited | Professional & scientific | 2021 |
| Harts Stationers & Printers Limited | Professional & scientific | 2014 |
| Hauska Press Ltd | Information & communication | 2023 |
| Haven Concepts Ltd | Professional & scientific | 2014 |
| Haver Plastics Limited | Manufacturing | 2013 |
| Haverhill Padel Club Limited | Arts & recreation | 2025 |
| Hawksbury Hunt Ltd | Agriculture & fishing | 2019 |
| Hawthorn ROW Management Limited | Households | 2019 |
| Hawthorne Developments (Camden) Limited | Construction | 2010 |
| Haymalley Limited | Real estate | 2018 |
| Haymay Holdings Ltd | Hospitality | 2023 |
| Haytaxi Limited | Transport & logistics | 2024 |
| HBI Property Ltd | Real estate | 2014 |
| HC Carpentry Solutions Limited | Construction | 2024 |
| Headlines Network Limited | Education | 2021 |
| Headstart Ventures Limited | Real estate | 2009 |
| Heartland Aviation Ltd | Administrative & support | 2016 |
| Heat-Tech S.E Ltd | Construction | 2008 |
| Heath Corner Property Management Ltd | Real estate | 2008 |
| Heatherside Sheet Metal Limited | Professional & scientific | 2003 |
| HEC 11 Ltd | Administrative & support | 2012 |
| Heist Recruitment Limited | Administrative & support | 2026 |
| Helen Dialect Limited | Arts & recreation | 2020 |
| HELIUM-3 Technologies Limited | Energy | 2021 |
| Hello WE ARE Bare Beauty Ltd | Other services | 2015 |
| Hellytaz Limited | Real estate | 2025 |
| Hempstead Services LLP | | 2012 |
| Henbe Communications Ltd | Professional & scientific | 2019 |
| Hendra Properties Ltd | Hospitality | 2021 |
| Hendry Consulting Limited | Professional & scientific | 2014 |
| HER Wings CIC | Health & social care | 2025 |
| Here to Care Home Care Services Ltd | Health & social care | 2018 |
| Heritage Park Homes Ltd | Hospitality | 2011 |
| Heritagexplore Ltd | Administrative & support | 2023 |
| Heritagexplore Media Ltd | Information & communication | 2020 |
| Hermitage Fencing and SON | | 2003 |
| Herts & Essex Independence at Home Ltd | Health & social care | 2014 |
| Hetty Cannon Health Ltd | Administrative & support | 2025 |
| HG Visualisation Limited | Administrative & support | 2024 |
| HI Range 777 Limited | Financial services | 2020 |
| Hi-Range Campers Ltd | Wholesale & retail | 2024 |
| Hi-Range Parts Ltd | Wholesale & retail | 2018 |
| Hidden GEM Glamping Limited | Hospitality | 2023 |
| Hideout Leather (2001) Ltd | Manufacturing | 2000 |
| Higginson Group Holdings Limited | Financial services | 2026 |
| Higginson James Limited | Professional & scientific | 2015 |
| High Beeches Limited | Households | 1994 |
| High Impact Leadership Ltd | Professional & scientific | 2025 |
| Highambury Limited | Financial services | 1971 |
| Highland Electronic Systems Limited | Manufacturing | 2024 |
| Highland Innovation Limited | Wholesale & retail | 2024 |
| Highland Mobility Limited | Wholesale & retail | 2021 |
| Highvoo (Media) Ltd | Professional & scientific | 2023 |
| Hillside Gardens Management (Amersham) Limited | Households | 2007 |
| Hilltop Lane (Saffron Walden) Management Company Limited | Real estate | 2001 |
| Hinxton Barns Limited | Professional & scientific | 2003 |
| Hiserv UK Limited | Administrative & support | 2013 |
| Hist.House Ltd | Education | 2018 |
| HJB Setting Ltd | Manufacturing | 2026 |
| HM Building & Maintenance Limited | Construction | 2017 |
| HM Ltd | Extraterritorial | 2009 |
| HMP Audio Visual Ltd | Professional & scientific | 2026 |
| Hobday Consulting Ltd | Other services | 2023 |
| Hogarth Productions Limited | Arts & recreation | 2014 |
| Holbank Management Services Limited | Real estate | 1983 |
| Holdtight Mgmt Limited | Arts & recreation | 2025 |
| Holmse Limited | Information & communication | 2024 |
| Holroyd Commercial Property LLP | | 2007 |
| Holroyd Two Limited | Financial services | 2012 |
| Home Energy Innovation Limited | Construction | 2022 |
| Honey Court Management Limited | Extraterritorial | 2018 |
| Honeybees Cafe Ltd | Hospitality | 2023 |
| Hook Productions Limited | Information & communication | 2021 |
| Hoop House Consultancy Limited | Professional & scientific | 2019 |
| Hooton Common Farm Limited | Extraterritorial | 2014 |
| Hooton Limited | Professional & scientific | 2025 |
| Hopleys Management Company Limited | Construction | 2025 |
| Horizon Court Residents Association Ltd | Households | 2001 |
| HOW to JOB Ltd | Administrative & support | 2022 |