| Hair & Makeup by Zara Rose Limited | Other services | 2025 |
| Halcyon Days Coaching Ltd | Administrative & support | 2018 |
| Halcyon Print Management Limited | Manufacturing | 2014 |
| Hale Accounting Services Limited | Professional & scientific | 2009 |
| Haleport Limited | Manufacturing | 2007 |
| Hall Investment Group Ltd | Real estate | 2022 |
| Hall Place Estate Management Ltd | Arts & recreation | 2022 |
| Halo Travels & Tours UK Ltd | Administrative & support | 2018 |
| Hambleton (Kent) Ltd | Financial services | 2016 |
| Hamhop Limited | Financial services | 2022 |
| Hamilton Trussell Ltd | Wholesale & retail | 2014 |
| Hammersmith and Fulham Central PCN Limited | Health & social care | 2022 |
| Hammond Building Solutions Ltd | Construction | 2021 |
| Hampson Beauty Clinic Tonbridge Ltd | Other services | 2019 |
| Hands on Growth Consulting Ltd | Professional & scientific | 2025 |
| Hannah and Abigail Ltd | Real estate | 2024 |
| Hanover House Healthcare Properties Limited | Real estate | 2015 |
| Hanover Talent Solutions Limited | Other services | 2008 |
| Hanworth Park House Holding Company Ltd | Real estate | 2015 |
| Hapi Fitness Ltd | Arts & recreation | 2019 |
| Happy Anatomy Ltd | Health & social care | 2026 |
| Happy Faces Pre-School Limited | Education | 2004 |
| Happy Go Holidays Travels & Tours Ltd | Administrative & support | 2025 |
| Haptic App Ltd | Information & communication | 2025 |
| Hardcorp Limited | Professional & scientific | 2003 |
| Hardystar Property Ltd | Real estate | 2023 |
| Harebottle & Associates Limited | Professional & scientific | 2020 |
| Harebottle Homes Limited | Construction | 2021 |
| Hargate Homes Limited | Real estate | 2020 |
| Harper Gale Limited | Administrative & support | 2008 |
| Harpers ED UK Ltd | Education | 2025 |
| Harris Treasury Systems Limited | Information & communication | 2010 |
| Harrys Fibre Ltd | Information & communication | 2025 |
| Harsec Limited | Real estate | 2001 |
| Hart Sleeves Limited | Households | 2008 |
| Hartfield Stores Limited | Wholesale & retail | 2013 |
| Harwood and Small Limited | Wholesale & retail | 2016 |
| HAS Scaffolding Consultants Ltd | Professional & scientific | 2023 |
| Hassles Limited(The) | Agriculture & fishing | 1985 |
| Haswell Mark Ltd | Health & social care | 2026 |
| HAT Training Ltd | Education | 2010 |
| Hatcham Management Limited | Administrative & support | 2022 |
| Haus of Freds Limited | Arts & recreation | 2021 |
| Haven Hackney Ltd | Other services | 2022 |
| Hawill Medical Ltd | Health & social care | 2019 |
| Hawk Hiring Ltd | Administrative & support | 2025 |
| Hawkwrx Ltd | Information & communication | 2025 |
| Hawthorn House (Paddock Wood) Management Company Limited | Households | 2021 |
| Hayat Ullah Khan Limited | Health & social care | 2014 |
| Haydens Management Limited | Households | 1992 |
| Hayes HR Consulting Limited | Administrative & support | 2020 |
| Hayle Investments Limited | Real estate | 2025 |
| Haylex Limited | Other services | 2010 |
| Haymar Neurophysiology Ltd | Health & social care | 2025 |
| Haynes Construction Project Management Ltd | Construction | 2025 |
| Hayward Family Holdings Limited | Wholesale & retail | 1951 |
| Hazal Rose Limited | Hospitality | 2020 |
| HBP Investments Limited | Construction | 2014 |
| HCO Group Ltd | Wholesale & retail | 2012 |
| Head Engineering Solutions ( H.E.S ) Ltd | Professional & scientific | 2019 |
| Headley and Associates Limited | Professional & scientific | 2025 |
| Headlines for Business Limited | Professional & scientific | 2010 |
| Headquarters Business Services Limited | Professional & scientific | 1995 |
| Headquarters Limited | Professional & scientific | 1993 |
| Headstart Computer Services Limited | Professional & scientific | 1989 |
| Heal Psychology Ltd | Health & social care | 2017 |
| Health Information Solutions Limited | Professional & scientific | 2006 |
| Health Narrator Limited | Information & communication | 2024 |
| Health Theory Coaching Ltd | Health & social care | 2024 |
| Healynicholls Consulting Ltd | Professional & scientific | 2012 |
| Heart Angels Defibrillators Ltd | Wholesale & retail | 2018 |
| Heart Imaging Limited | Health & social care | 2017 |
| Heart Specialists Limited | Health & social care | 2022 |
| Heartfelt Films Limited | Information & communication | 2019 |
| Heattech Contractors Ltd | Construction | 2023 |
| Hebborns Hospitality Ltd | Hospitality | 2023 |
| Heidesigns Ltd | Administrative & support | 2019 |
| Heidis Futures LLP | | 2008 |
| Helen Dorfman & Associates Limited | Professional & scientific | 2018 |
| Helena Scott Anaesthetics Limited | Health & social care | 2018 |
| Helicon Arts Limited | Administrative & support | 2000 |
| Helme Consultancy Limited | Health & social care | 2024 |
| Hemsmart Ltd | Information & communication | 2025 |
| Hendley Removals & Storage Ltd | Transport & logistics | 2016 |
| Hendrick Consulting Limited | Professional & scientific | 2021 |
| Heniam & Associates Limited | Administrative & support | 2025 |
| Henry Charles Ltd | Wholesale & retail | 2023 |
| Henry Scaffolding Ltd | Administrative & support | 2017 |
| Henry Shields Limited | Arts & recreation | 2014 |
| Henry Shields Property Limited | Real estate | 2019 |
| Henshaw Place Management Company Limited | Households | 2024 |
| Hepford Consulting Limited | Real estate | 2010 |
| Hepford Holdings Limited | Real estate | 2010 |
| Herbesco Ltd | Real estate | 2015 |
| Herd Ltd | Manufacturing | 2018 |
| Heritage Paddock Wood Limited | Arts & recreation | 2019 |
| Heritage Vehicle Holdings Ltd | Financial services | 2026 |
| Hermitage Court Management Co. (Tonbridge) Ltd | Administrative & support | 1996 |
| Herne Hill Driving School Ltd | Education | 2026 |
| Herons IT Solutions Limited | Information & communication | 2026 |