| Hayes Construction Services Ltd | Construction | 2024 |
| Hayleys School of Dance Ltd | Education | 2019 |
| Haynard Ltd | Professional & scientific | 2009 |
| Hayward Fit OUT Limited | Construction | 2020 |
| Hcing Ltd | Administrative & support | 2016 |
| Heads UP Design Limited | Professional & scientific | 2009 |
| Healthy Veins Limited | Health & social care | 2025 |
| Hearts Academy Trust | Education | 2011 |
| Heating OIL Near ME Ltd | Administrative & support | 2025 |
| Hector's Post Limited | Wholesale & retail | 2020 |
| Hedingham Place Limited | Hospitality | 2001 |
| Hello Smooth Ltd | Other services | 2025 |
| Henley Recruitment Ltd | Administrative & support | 2025 |
| Henris Evangelical Revival Association Limited | Other services | 1964 |
| Henry Patterdale Limited | Wholesale & retail | 2014 |
| Henry's Heating Limited | Construction | 2020 |
| Henshaw & Emerson Limited | Manufacturing | 2003 |
| Herban 90 Ltd | Transport & logistics | 2018 |
| Here to Care Limited | Health & social care | 2006 |
| Heritage Medical Trust Ltd | Administrative & support | 2021 |
| Heron Stream Stud Ltd | Agriculture & fishing | 2020 |
| Herone Building & Development Co. Limited | Construction | 1957 |
| Hevery Creations Limited | Information & communication | 2021 |
| Hewlen Homes Limited | Real estate | 2003 |
| HF Global Ltd | Wholesale & retail | 2018 |
| HG Studioz Ltd | Other services | 2024 |
| HI Transport Ltd | Other services | 2016 |
| Higgins Heritage Ltd | Real estate | 2024 |
| Highbrock Services Ltd | Construction | 2024 |
| Highland Court (Woodford) Limited | Households | 1976 |
| Highland Mermaid & Co. | | 2008 |
| Highpoint Prestige Developments Ltd | Construction | 2026 |
| Highpoint Prestige Properties Limited | Construction | 2025 |
| Highworks Rope Access Ltd | Administrative & support | 2023 |
| Hill Allen (Wickford) Limited | Professional & scientific | 2007 |
| Hill Valley Solutions Ltd | Information & communication | 2024 |
| Hillcrest View Vange Management Company Limited | Households | 1985 |
| Hilton Homes Limited | Construction | 2026 |
| Hilton Service Group Limited | Construction | 2021 |
| HJ Ground Maintenance Ltd | Administrative & support | 2024 |
| HJA Houses Ltd | Real estate | 2025 |
| HK Recovery Equipments & Metal Works Ltd | Wholesale & retail | 2021 |
| HM Insulations Limited | Construction | 2026 |
| HMV Freight Ltd | Transport & logistics | 2009 |
| HN Afzal Properties Ltd | Real estate | 2021 |
| HNT Medicals Limited | Health & social care | 2016 |
| HOB E Ltd | Wholesale & retail | 2022 |
| Hodgson Court Management Company (NO.2) Limited | Households | 2004 |
| HOI Chelmsford Ltd | Other services | 2025 |
| HOI Romford Ltd | Other services | 2025 |
| Holder Family Ltd | Wholesale & retail | 2021 |
| Holdfield Group Holdings Limited | Real estate | 2015 |
| Holdfield Group Limited | Real estate | 1952 |
| Holmans Park Limited | Real estate | 2011 |
| Home County Developing Limited | Construction | 2023 |
| Home of Design Limited | Professional & scientific | 2013 |
| Homecare Installations (Essex) Limited | Construction | 2010 |
| Honest Sparks Ltd | Construction | 2011 |
| Hookslam Limited | Administrative & support | 2019 |
| Horsman Brothers Ltd | Construction | 2015 |
| Horst F.G. Angermann (G.B.) Limited | Professional & scientific | 1974 |
| Hostdaily Limited | Real estate | 2024 |
| Hot Curry Ltd | Hospitality | 2019 |
| House of Words Media Limited | Information & communication | 2017 |
| House TEN Ltd | Real estate | 2021 |
| Hovefields Limited | Real estate | 1932 |
| Hovercode Ltd | Information & communication | 2023 |
| Howesenberg Films Ltd | Information & communication | 2022 |
| Hownsgill Limited | Construction | 2022 |
| HQ Publishing Limited | Administrative & support | 2020 |
| HR Connections Ltd. | Professional & scientific | 2001 |
| HRW Developments Limited | Construction | 2024 |
| HSD Dance Ltd | Education | 2021 |
| Hsqe Limited | Professional & scientific | 2002 |
| HT Plumbing and Heating Services Ltd | Construction | 2021 |
| Hudson Packaging Limited | Wholesale & retail | 2005 |
| Humbrella Ltd | Manufacturing | 2014 |
| Humm Security Services Limited | Administrative & support | 2023 |
| Humm Services Limited | Construction | 2019 |
| Hunter Access Solutions Limited | Other services | 2023 |
| Hurricane Close (Shotgate) Management Company Limited | Real estate | 1989 |
| Hurricane Heights Limited | Real estate | 1989 |
| Hush to Roar Ltd | Health & social care | 2023 |
| Hvse Limited | Construction | 2012 |
| HWC Logistics Limited | Transport & logistics | 2020 |
| HWM Trading Ltd | Wholesale & retail | 2025 |
| Hybrid Performance Group Ltd | Administrative & support | 2023 |
| Hyde Partners Limited | Administrative & support | 2024 |
| Hyde Property Management Ltd | Real estate | 2022 |
| Hydrogen Control Technologies Ltd | Administrative & support | 2023 |
| I C Lotus Ltd | Real estate | 2021 |
| I Want to Buy a Car Limited | Extraterritorial | 2011 |
| I-Inspire Consulting Limited | Administrative & support | 2010 |
| I-Tip Group Ltd | Construction | 2025 |
| I.T.E. Management Limited | Professional & scientific | 1986 |
| IA Accounts Essex Limited | Professional & scientific | 2025 |
| IAN Lewis Ltd | Professional & scientific | 2003 |
| IBH Accountancy & Tax LLP | | 2024 |
| Icarus Transport Services Ltd | Transport & logistics | 2021 |
| ICD Construction Ltd | Construction | 2023 |