| Holmesdale Partners Ltd | Other services | 2009 |
| Holomed Ltd | Other services | 2023 |
| Holonomix Limited | Information & communication | 2004 |
| Holophane Europe Limited | Manufacturing | 1965 |
| Holophane Lighting Limited | Manufacturing | 1998 |
| Holy Dough Limited | Hospitality | 2024 |
| Holy Moly Dairy Alternatives Ltd | Manufacturing | 2020 |
| Holy Moly Ltd | Manufacturing | 2016 |
| Hombase Ltd | Wholesale & retail | 2022 |
| Home & Away Healthcare Ltd | Health & social care | 2023 |
| Home City MK Ltd | Real estate | 2023 |
| Home Counties Architectural Services Limited | Professional & scientific | 2019 |
| Home Counties Electrical Services Limited | Construction | 2000 |
| Home Counties ISW Ltd | Health & social care | 2024 |
| Home Creations International Holdings Ltd | Financial services | 2025 |
| Home Creations International Limited | Wholesale & retail | 2016 |
| Home Easespark Ltd | Wholesale & retail | 2024 |
| Home Farm MK Ltd | Manufacturing | 2021 |
| Home Farm Racing Limited | Agriculture & fishing | 2012 |
| Home Farm Retreats Limited | Hospitality | 2023 |
| Home Fuels Bathrooms Ltd | Construction | 2019 |
| Home Fuels Ltd | Construction | 2019 |
| Home Guttering Ltd | Manufacturing | 2019 |
| Home Help & Care Limited | Health & social care | 2024 |
| Home Invest Solutions Ltd | Real estate | 2024 |
| Home Legends Cleaning Ltd | Administrative & support | 2022 |
| Home Legends Landscaping Ltd | Administrative & support | 2019 |
| Home Maintenance & Support Services Ltd | Administrative & support | 2016 |
| Home Services (MK) Ltd | Wholesale & retail | 2012 |
| Homebase Group Limited | Wholesale & retail | 2000 |
| Homebase Rooms Limited | Wholesale & retail | 2019 |
| Homebird Limited | Health & social care | 2019 |
| Homeclean Milton Keynes Ltd | Administrative & support | 2016 |
| Homeclean [Pubs & Bars] Limited | Administrative & support | 2012 |
| Homefix MK Ltd | Construction | 2014 |
| Homegrown Nation Limited | Real estate | 2017 |
| Homekey Developments Ltd | Construction | 2026 |
| Homekey Mortgage Solutions Ltd | Financial services | 2018 |
| Homekey Properties Ltd | Real estate | 2020 |
| Homekey Sales & Lettings Ltd | Real estate | 2022 |
| Homeley Properties Ltd | Real estate | 2022 |
| Homely Heights Care Limited | Health & social care | 2025 |
| Homepluzz Interiors Limited | Wholesale & retail | 2012 |
| Homepulse Technologies Ltd | Information & communication | 2026 |
| Homes and Dreams Limited | Real estate | 2018 |
| Homes for People Limited | Hospitality | 2015 |
| Homes Key Property Group Limited | Real estate | 2019 |
| Homes MK Ltd | Real estate | 2020 |
| Homes of Peace UK Ltd | Households | 2023 |
| HOMES4LIFE Properties Ltd | Real estate | 2017 |
| Homeviews Platform Limited | Administrative & support | 2016 |
| Homeward Legal Limited | Administrative & support | 2010 |
| Homewood Investments Ltd | Real estate | 2021 |
| Homeworld Improvements Ltd | Construction | 2023 |
| Homeworx Renovations Ltd | Construction | 2024 |
| Honda Racing Corporation UK Limited | Arts & recreation | 2024 |
| Honey (Sports) Holdings Limited | Financial services | 2025 |
| Honey Mosaics Ltd | Arts & recreation | 2023 |
| Honey Tradition Limited | Wholesale & retail | 2020 |
| Honeycomb Learning Limited | Education | 2011 |
| Honeywood Properties Limited | Real estate | 2022 |
| Hongguang Media Ltd | Wholesale & retail | 2025 |
| Hongshan Digital Technology Ltd. | Wholesale & retail | 2025 |
| Hoofprint Productions Ltd. | Information & communication | 2017 |
| Hook Line and Cscinker Ltd | Professional & scientific | 2019 |
| Hooshmand Consultancy Ltd | Professional & scientific | 2019 |
| Hooz Products Ltd | Wholesale & retail | 2021 |
| HOP Building Services Limited | Construction | 2025 |
| Hopco Limited | Administrative & support | 1992 |
| Hopcott Developments Limited | Real estate | 2021 |
| Hope Children Homes Ltd | Health & social care | 2022 |
| Hope Dimension Limited | Health & social care | 2014 |
| Hope for Better Life Limited | Health & social care | 2024 |
| Hope for the Hopeless Global Outreach Ltd | Health & social care | 2024 |
| Hope Nation Relief and Resettlement Limited | Information & communication | 2023 |
| Hope Rollins Ltd | Other services | 2013 |
| Hope Sanctuary Limited | Other services | 2015 |
| Hope Tavern Restaurant Ltd | Hospitality | 2019 |
| Hopeson Alifoe Limited | Health & social care | 2008 |
| Horizon Cleaning Services Limited | Administrative & support | 2023 |
| Horizon Nine Group Limited | Real estate | 2020 |
| Horizon Radio Limited | Information & communication | 2022 |
| Horizon Serviced Apartments Limited | Real estate | 2015 |
| Horn of Revival Ministry Ltd | Other services | 2019 |
| Hornbeam Cpam Ltd | Real estate | 2010 |
| Hornbill International Studios Ltd | Information & communication | 2025 |
| Horner Properties (MK) Ltd | Real estate | 2025 |
| Hornes Brewery Ltd | Manufacturing | 2015 |
| Horribly Popular Ltd | Wholesale & retail | 2019 |
| Horse Health Solutions Limited | Wholesale & retail | 2025 |
| Horsenden Holdings Limited | Health & social care | 2017 |
| Horsenden Land 2 Limited | Health & social care | 2017 |
| Horsenden Land 3 Limited | Health & social care | 2017 |
| Horsenden Land 4 Limited | Health & social care | 2023 |
| Horsenden Land 5 Limited | Health & social care | 2023 |
| Horsenden Land Limited | Health & social care | 2016 |
| Horsenden Trustees Limited | Professional & scientific | 2009 |
| Horseuk Ltd | Hospitality | 2024 |
| Hortenzia Limited | Professional & scientific | 2025 |
| Hortique Ltd | Administrative & support | 2022 |