| Hawthorn Lodge Limited | Households | 1976 |
| Hawthorn Square Limited | Households | 2004 |
| Hawthorn Stationers Limited | Real estate | 1957 |
| HAY Anaesthetics Limited | Health & social care | 2022 |
| Hayley James Communications Ltd | Professional & scientific | 2024 |
| Hayley's Flower Studio Limited | Wholesale & retail | 2013 |
| Hays Regeneration Interim and Consulting Ltd | Professional & scientific | 2024 |
| Haytim Ltd | Real estate | 2020 |
| Hayz MCR Ltd | Hospitality | 2022 |
| Haze Customisation Ltd | Professional & scientific | 2023 |
| Hazelwood Projects Ltd | Construction | 2017 |
| Hazelwood Surveyors Ltd | Professional & scientific | 2018 |
| HBM Consultancy Ltd | Wholesale & retail | 2020 |
| Hbmm Holdings Ltd | Financial services | 2021 |
| HCL Anaesthetics Limited | Health & social care | 2025 |
| HCR Projects Ltd | Information & communication | 2025 |
| Hcxconsulting Limited | Professional & scientific | 2023 |
| Hdmc Ltd | Professional & scientific | 2017 |
| HDP Group Ltd | Financial services | 2024 |
| HDW Property Ltd | Real estate | 2021 |
| Head First Products Ltd | Wholesale & retail | 2019 |
| Headspace Counselling Limited | Health & social care | 2012 |
| Healey Court RTM Company Limited | Households | 2016 |
| Health & Hormones Ltd | Health & social care | 2023 |
| Health and Future Planning Limited | Health & social care | 2023 |
| Healthcare Specialists Limited | Health & social care | 2017 |
| Healthy GUT Limited | Health & social care | 2019 |
| Healthy Reputations Ltd | Professional & scientific | 2024 |
| Heather Belfield Limited | Health & social care | 2025 |
| HEB Business Solutions Ltd | Professional & scientific | 2025 |
| HED Haulage Limited | Transport & logistics | 2018 |
| Heelbox Limited | Wholesale & retail | 2012 |
| Helico Consulting Limited | Professional & scientific | 2021 |
| Helico Holdings Limited | Financial services | 2021 |
| Helico Tech Ltd | Transport & logistics | 2018 |
| Heljack Limited | Administrative & support | 2005 |
| Hellas Taverna Group Ltd | Hospitality | 2021 |
| Helpfulhand Limited | Wholesale & retail | 2017 |
| Helric Limited | Financial services | 2020 |
| HEM Medical Limited | Health & social care | 2025 |
| Hemmerdinger EYE Care Limited | Health & social care | 2013 |
| Hemmons Property Developments Ltd | Real estate | 2009 |
| Henharrier Consulting Limited | Professional & scientific | 2015 |
| Henlly UK Ltd | Health & social care | 2010 |
| Henrietta Court RTM Company Limited | Households | 2022 |
| Henry Mainwaring Limited | Professional & scientific | 2020 |
| Henry Mills Motors 2 Ltd | Wholesale & retail | 2025 |
| Henry Mills Motors Ltd | Wholesale & retail | 2025 |
| Henry Nicholas Associates Limited | Administrative & support | 2005 |
| Here Partnership Limited | Professional & scientific | 2024 |
| Hericon Ltd | Administrative & support | 2025 |
| Heritage Spa Developments Limited | Real estate | 2011 |
| Hermitage Holdings (Wilmslow) Limited | Professional & scientific | 2015 |
| Herring Properties Limited | Construction | 2003 |
| Herring Property Development Ltd | Construction | 2018 |
| HES Tractec Limited | Extraterritorial | 2006 |
| HEY Yore Properties Limited | Real estate | 2025 |
| Heymaker Limited | Manufacturing | 2016 |
| HG Assist Ltd | Administrative & support | 2025 |
| HGN Global Holdings Ltd | Administrative & support | 2022 |
| Hhcc Medical LLP | | 2023 |
| HI Liverpool Ltd | Real estate | 2017 |
| Hideaway Group Limited | Hospitality | 2018 |
| High Ends Properties Ltd | Real estate | 2024 |
| High Peak House Limited | Health & social care | 2017 |
| High Performance Individuals Limited | Professional & scientific | 2023 |
| High Trees Business Advisors Limited | Professional & scientific | 2025 |
| Higher Acre LLP | | 2011 |
| Higher Sights UK Limited | Real estate | 2022 |
| Highgrade ENT Ltd | Wholesale & retail | 2024 |
| Highland Ascents Limited | Extraterritorial | 2016 |
| Highway Films Limited | Wholesale & retail | 2004 |
| HII Partnership Ltd | Real estate | 2025 |
| HIJ Capital Ltd | Real estate | 2025 |
| Hikp Ltd | Financial services | 2025 |
| Hillside Court RTM Company Limited | Households | 2020 |
| Hillside Labs Limited | Information & communication | 2026 |
| Hilltop Homes Ltd | Real estate | 2021 |
| HJ Trading Ltd | Wholesale & retail | 2026 |
| HKT Holdings Limited | Real estate | 2017 |
| HKT Medical Ltd | Health & social care | 2014 |
| HKT Property Enterprises Limited | Real estate | 2017 |
| HLP Advisory Ltd | Professional & scientific | 2020 |
| Hltg Properties Limited | Real estate | 2025 |
| Hltg Retail Limited | Wholesale & retail | 2020 |
| Hltg Tile Distribution Limited | Wholesale & retail | 2024 |
| Hlwsurgical Limited | Health & social care | 2020 |
| HM Medical Limited | Health & social care | 2021 |
| HM10 Limited | Administrative & support | 2020 |
| HNB Cosmetics Group Limited | Financial services | 2025 |
| HNB Cosmetics Limited | Administrative & support | 2017 |
| HNC Technical Services Limited | Construction | 2008 |
| HNK Property Limited | Real estate | 2017 |
| HNZ Limited | Health & social care | 2016 |
| Hoda Construction Limited | Construction | 2016 |
| Hoda Holdings Limited | Real estate | 2023 |
| Holistic (NW) Limited | Extraterritorial | 2017 |
| Holistic Health & Wellness Limited | Health & social care | 2024 |
| Holland Business Advisory LLP | | 2016 |
| Holland Court (Stockport) RTM Company Limited | Households | 2020 |