| Hamiltons Boutique Ltd | Hospitality | 2017 |
| Hamlet Estate Agents Limited | Real estate | 1966 |
| Hammind Hydraulics Limited | Manufacturing | 1984 |
| Hampshire Exteriors Ltd | Administrative & support | 2024 |
| Hampshire Roof Repairs Ltd | Construction | 2017 |
| Hampstead Noor Ltd | Real estate | 2026 |
| Hamstel Autos MOT Station & Repairs Limited | Wholesale & retail | 2018 |
| Hamstel Local Limited | Wholesale & retail | 2022 |
| Hanandalextravel Ltd | Information & communication | 2025 |
| Hand Wrist and Elbow Clinic Ltd | Health & social care | 2015 |
| Handiman Services Limited | Construction | 2017 |
| Handipaws Ltd | Other services | 2025 |
| Handsoff Limited | Real estate | 2001 |
| Hannahmona Limited | Health & social care | 2023 |
| Hanover Shine Ltd | Real estate | 1998 |
| Hanstead Park Management Company Limited | Households | 2019 |
| Happy Faces Nursery Ltd | Education | 2026 |
| Happy Parents Happy Baby Ltd | Education | 2018 |
| Happy Taxman Ltd | Professional & scientific | 2024 |
| Happyhippyhospitality Ltd | Hospitality | 2026 |
| Hardings EMC Limited | Professional & scientific | 2015 |
| Hardings Group Investments Ltd | Real estate | 2018 |
| Hardings Group Ltd | Financial services | 2022 |
| Hardings International Limited | Real estate | 2014 |
| Hardy Close Phase 2 (Chelmsford) Management Company Limited | Professional & scientific | 2018 |
| Hardy-King Estate Agents Limited | Real estate | 2014 |
| Harlow Town Football Club (2026) Ltd | Arts & recreation | 2026 |
| Harmani Fast Foods Ltd | Hospitality | 2018 |
| Harmont Ltd | Real estate | 2025 |
| Harnic Properties Limited | Real estate | 2017 |
| Harris & Bundy Property Ltd | Real estate | 2020 |
| Harris & Pizzulo Ltd | Wholesale & retail | 2022 |
| Harris Mgps Consultancy Services Limited | Professional & scientific | 2021 |
| Harris Yard (Saffron Walden) NO.1 Management Company Limited | Households | 2004 |
| Harrison Gray Limited | Financial services | 2011 |
| Harry Leeson Limited | Professional & scientific | 2022 |
| Hartcliffe Meadows (Penistone) Management Company Limited | Households | 2015 |
| Harter Street Management Limited | Households | 2017 |
| Hartley Brook (Netherton) Management Company Limited | Households | 2015 |
| Hartley-Gil Property Ltd | Real estate | 2025 |
| Hartvale Limited | Other services | 2010 |
| Hartwell Financial Planning Limited | Financial services | 2021 |
| Harvest Meadows (Southwater) Management Company Limited | Households | 2012 |
| Haseeb 189 Limited | Wholesale & retail | 2025 |
| HASSLE3 Ltd | Extraterritorial | 2021 |
| Hathaway Washeteria Limited | Other services | 2026 |
| Hatwell West Cliff On-Sea Limited | Construction | 2007 |
| Haven Management Thorpe Bay Limited | Households | 2007 |
| Havengore House (Leigh-On-Sea) Limited | Real estate | 2010 |
| Havens Hospices | Health & social care | 1993 |
| Havens Hospices Trading Company Limited | Wholesale & retail | 1991 |
| Havenside Properties Ltd | Real estate | 2022 |
| Hawk Moor Investments Limited | Real estate | 2024 |
| Hawkins Electrical Services Limited | Construction | 1994 |
| Hawkwell Vehicle Services Ltd | Wholesale & retail | 2018 |
| Hawthorn Interiors Limited | Administrative & support | 2001 |
| Hawtree Property Limited | Real estate | 2019 |
| Haxhi D Ltd | Construction | 2018 |
| Hayfields Transport Ltd | Transport & logistics | 2020 |
| Hayward Monarch Ltd | Information & communication | 2025 |
| HAZ Creations Ltd | Other services | 2025 |
| Hazeldene (Ingleby Barwick) Management Company Limited | Households | 2013 |
| Hazels Hedgehogs Limited | Extraterritorial | 2014 |
| HBH Wickford Ltd | Real estate | 2016 |
| HCL Activity Camps Limited | Education | 2022 |
| HCS Mortgages & Protection Ltd | Financial services | 2019 |
| HDM Services (London) Ltd | Construction | 2013 |
| Headfirst Ltd | Construction | 2024 |
| Headley Way Serviced Accommodation Ltd | Households | 2024 |
| Headline Investments Limited | Real estate | 1995 |
| Healing House by the Sea Ltd | Other services | 2024 |
| Health Incidents Investigations Consultancy Ltd | Professional & scientific | 2019 |
| Healthy Workplace Limited | Health & social care | 2011 |
| Heavenly Tanning Ltd | Other services | 2026 |
| Hecares Supported Accommodation Services Ltd | Public administration | 2023 |
| Hedgehog Development (Essex) Limited | Construction | 2007 |
| Hedges Demo Ltd | Construction | 2024 |
| Heds Investment Ltd | Professional & scientific | 2024 |
| Helaly Ltd | Professional & scientific | 2025 |
| Helpful IT Ltd | Information & communication | 2015 |
| Hendon Removal & Waste Limited | Water & waste | 2014 |
| Henry Burgers Ltd | Hospitality | 2013 |
| Hephzibah Productions Limited | Wholesale & retail | 2010 |
| Heritage Loft Specialists Essex Ltd | Construction | 2011 |
| Heritage Restaurant & Lounge Ltd | Hospitality | 2019 |
| Hero (Wimbledon Chase) Management Company Limited | Households | 2014 |
| Herts Domestic Energy Solutions Limited | Construction | 2007 |
| Hescom Ltd | Transport & logistics | 2019 |
| Heselgrove Limited | Wholesale & retail | 2023 |
| Hewenden Ridge (Cullingworth) Management Company Limited | Households | 2015 |
| Hexaghost Limited | Professional & scientific | 2025 |
| HFC Associates Limited | Professional & scientific | 2008 |
| HG Transport Ltd | Transport & logistics | 2023 |
| HGV Driver Cover Essex Ltd | Transport & logistics | 2025 |
| HH86 Limited | Real estate | 2018 |
| HI TEC Steel Solutions Ltd | Manufacturing | 2009 |
| HI TEC Steel Supplies Ltd | Construction | 2012 |
| Hickstech Limited | Information & communication | 2024 |
| Higgins & Shakerchi Limited | Professional & scientific | 2015 |
| High Class Sport Ltd | Education | 2021 |