| Hawkley Graham Agency Ltd | Wholesale & retail | 2024 |
| Hawks Foundation CIC | Arts & recreation | 2023 |
| Hawthorn Block 2 Valiant Fields Residents Management Company Ltd | Households | 2025 |
| Hawthorn House Management Limited | Households | 2000 |
| Hayfields Consultancy Ltd | Administrative & support | 2012 |
| Hayley Kooner Limited | Other services | 2022 |
| Hayley Tucker Health Ltd | Health & social care | 2024 |
| Hayment Limited | Information & communication | 2020 |
| Haynes Property Developers Limited | Construction | 2025 |
| Hayward Scott Limited | Other services | 2019 |
| HB Tuition Ltd | Education | 2021 |
| HBL26 Ltd | Hospitality | 2026 |
| HBN 247 Ltd | Administrative & support | 2024 |
| HCW Developments Limited | Construction | 2016 |
| Health Check Ninjas Ltd | Health & social care | 2024 |
| Health Strategies Limited | Health & social care | 2007 |
| Healthpal Ltd | Health & social care | 2021 |
| Healthworks Ltd | Wholesale & retail | 1999 |
| Heaphy's of Warwick LLP | | 2012 |
| Hearing Specialists Ltd | Health & social care | 2022 |
| Heart of England Family Mediation Ltd | Professional & scientific | 2026 |
| Heart Transformation Ministry Limited | Other services | 2020 |
| Heathcote Associates Limited | Administrative & support | 2021 |
| Heathcote Plumbing & Heating (UK) Ltd | Construction | 2014 |
| Heathcote Property Group Ltd | Real estate | 2017 |
| Heatherland Developments Limited | Construction | 2019 |
| Heathgate Consulting Ltd. | Professional & scientific | 2016 |
| Heatrae Sadia Heating Limited | Extraterritorial | 1936 |
| Heatwave Boiler Care Limited | Construction | 2023 |
| Heavyweight Bildings & Transport Ltd | Construction | 2015 |
| HEB Consultancy Limited | Professional & scientific | 2016 |
| Heiniger UK Limited | Manufacturing | 2019 |
| Helen Muir Consulting Limited | Professional & scientific | 2012 |
| Heli Air Limited | Transport & logistics | 1986 |
| Hemp Whole Foods Ltd | Manufacturing | 2021 |
| Hendys Commercial Services Limited | Professional & scientific | 2004 |
| Henley Research International Limited | Administrative & support | 1994 |
| Henley Talent Intelligence Limited | Administrative & support | 2005 |
| Henriksdahl Limited | Wholesale & retail | 2015 |
| Here WE Help Coaching Ltd | Professional & scientific | 2020 |
| Heritage Field Management Company Limited | Households | 2018 |
| Hero SEO Ltd | Information & communication | 2020 |
| Heron House Retreat Limited | Hospitality | 2025 |
| Heron Technology Limited | Information & communication | 2025 |
| HES (Northern) Ltd | Construction | 2010 |
| HES Group Services Limited | Information & communication | 2025 |
| HEW Solutions Limited | Other services | 2016 |
| Hewitt Home & Energy Solutions Limited | Manufacturing | 2017 |
| Hewitts Appliances Limited | Wholesale & retail | 2025 |
| Hexray Ltd | Information & communication | 2007 |
| HEY Mobility Limited | Information & communication | 2025 |
| HEY! Trixie Ltd | Wholesale & retail | 2020 |
| HG Trailers Ltd | Wholesale & retail | 2026 |
| Hguk Restaurants Limited | Hospitality | 2023 |
| HH MED Ltd | Wholesale & retail | 2025 |
| HHG FOX One Limited | Financial services | 2022 |
| Hhsc Holdings Limited | Financial services | 2021 |
| Hi-Lite Electrical Limited | Construction | 2003 |
| Hiberus Ltd | Information & communication | 2017 |
| Hidden Artist C.I.C. | Professional & scientific | 2024 |
| Hidden Corners (Leamington) Limited | Real estate | 2017 |
| Hieland Consulting Limited | Administrative & support | 2016 |
| High Chimneys Limited | Real estate | 2019 |
| High Cross Construction (UK) Limited | Construction | 2010 |
| High Hazard Consulting Limited | Professional & scientific | 2017 |
| High Views Management Company Ltd | Extraterritorial | 2019 |
| Higham & Deasy Events Ltd | Hospitality | 2024 |
| Highbank Property Management Ltd | Households | 2015 |
| Hill Close Gardens Trust Limited | Arts & recreation | 2000 |
| Hill Side Agricultural Ltd | Agriculture & fishing | 2026 |
| Hillfields Estates Ltd | Real estate | 2022 |
| Hilotherapy UK Limited | Wholesale & retail | 2012 |
| Hilotherm Ltd | Wholesale & retail | 2018 |
| Himanshu Consulting Services Ltd | Professional & scientific | 2026 |
| Hiperlan Limited | Administrative & support | 2003 |
| Hirsch the Bracelet UK Limited | Manufacturing | 2023 |
| Hissmekano Ltd | Wholesale & retail | 2026 |
| Historic Warwick App Ltd | Information & communication | 2023 |
| HIT Consultants Ltd | Professional & scientific | 2024 |
| Hitchin Land Limited | Real estate | 2021 |
| HIX Advisory Ltd | Information & communication | 2025 |
| HJ Tree Surgeons Limited | Administrative & support | 2025 |
| HJR Landscapes Limited | Agriculture & fishing | 2020 |
| HK3D Solutions Limited | Manufacturing | 2009 |
| HLA BIO Labs Ltd | Information & communication | 2016 |
| HLA Labs Ltd | Manufacturing | 2024 |
| HLX Technology Limited | Professional & scientific | 2014 |
| HM Bryan & Sons Limited | Wholesale & retail | 1998 |
| HMQ Developments Ltd | Real estate | 2020 |
| HMS Industrial Networks Limited | Other services | 2011 |
| HN Traders Midlands Ltd | Wholesale & retail | 2024 |
| Hnatt Properties Ltd | Real estate | 2025 |
| Hobbins Consultancy Limited | Extraterritorial | 2025 |
| Hockley Heath Social Club Ltd | Hospitality | 2017 |
| Hogia Transport Systems Limited | Administrative & support | 2007 |
| Hoglet Investments Ltd | Real estate | 2023 |
| Holding JDR Limited | Professional & scientific | 2017 |
| Holdsworth Communications Limited | Professional & scientific | 2002 |
| Holioake Drive Residents Management Company Ltd | Households | 2019 |
| Holloway Roofing Limited | Construction | 2023 |