| Hamilton Hart Ltd | Construction | 2023 |
| Hamilton Hughes Recruitment Ltd | Administrative & support | 2014 |
| Hamilton Safety Consultants Ltd | Professional & scientific | 2019 |
| Hammerton Cars Limited | Wholesale & retail | 2003 |
| Hampass Grouse Ltd. | Real estate | 2023 |
| Hampden Partners Limited | Professional & scientific | 2010 |
| Hampton Centurion Limited | Professional & scientific | 2022 |
| Hamsard 3667 Limited | Extraterritorial | 2022 |
| Han-Sea Limited | Wholesale & retail | 2008 |
| Hancock Builders Ltd | Construction | 2003 |
| Hand & Machine Ltd | Manufacturing | 2014 |
| Handeline Ltd | Manufacturing | 2020 |
| Hands That Heal Limited | Health & social care | 2016 |
| Hanford Homes Ltd | Real estate | 2019 |
| Hangar North Limited | Extraterritorial | 2022 |
| Hanger 13 Limited | Real estate | 2025 |
| Hanger 15 Limited | Agriculture & fishing | 2025 |
| Hanjo Consultants Limited | Information & communication | 2018 |
| Hanks Trading Limited | Other services | 2019 |
| Hanley G Limited | Real estate | 2010 |
| Hanley G Property Limited | Real estate | 2011 |
| Hanley Marchant Limited | Professional & scientific | 2010 |
| Hannah Hilton Consulting Ltd | Professional & scientific | 2026 |
| Hanover Trsr Ltd | Real estate | 2017 |
| Hansom Place (Sheltered) York RTM Company Limited | Households | 2012 |
| Hanson Actuarial Services Limited | Administrative & support | 1999 |
| Hansons Reach (Stewartby) Residents Management Company Limited | Households | 2016 |
| Hanwell Chase (Banbury) Residents Management Company Limited | Households | 2016 |
| Haoshiju Ltd | Hospitality | 2023 |
| Haphit Ltd | Wholesale & retail | 2006 |
| Happy Chef York Ltd | Hospitality | 2024 |
| Happy Cottage York Ltd | Hospitality | 2023 |
| Happy Cubs Childminding Ltd | Health & social care | 2025 |
| Happy Dragon Takeaway Ltd | Hospitality | 2025 |
| Happy Home Care Services Ltd | Professional & scientific | 2019 |
| Happy Land Holding Ltd | Information & communication | 2020 |
| Happy Little Hedgehogs Day Nursery Ltd | Health & social care | 2022 |
| Happy Noodles York Ltd | Hospitality | 2021 |
| Happy Pebble Productions Ltd | Arts & recreation | 2022 |
| Happy Valley York Ltd | Hospitality | 2018 |
| Happynest Homes Ltd | Manufacturing | 2023 |
| Harbourside View (Portchester) Management Company Limited | Real estate | 2018 |
| Hardcastle Homes Ltd | Real estate | 2024 |
| Hardcastle Properties York Ltd | Real estate | 2022 |
| Hardgrave Joinery Limited | Manufacturing | 2003 |
| Hardie Events Limited | Hospitality | 2024 |
| Hardiman Property Management Limited | Real estate | 2009 |
| Hardmoor Associates Limited | Professional & scientific | 2006 |
| Hardy Housing Ltd | Construction | 2017 |
| Hare & Co Limited | Professional & scientific | 2004 |
| Hare Homes (Yorkshire) Limited | Administrative & support | 2002 |
| Harford Accountancy Limited | Professional & scientific | 2015 |
| Harkan Gaming Ltd | Information & communication | 2025 |
| Harkness Design Studios Ltd | Professional & scientific | 2024 |
| Harlands Park (Uckfield) Residents Management Company Limited | Households | 2021 |
| Harlequin Training Solutions Limited | Information & communication | 1996 |
| Harlequin Wines Limited | Professional & scientific | 2001 |
| Harlequin York Limited | Professional & scientific | 2018 |
| Harlow Associates Limited | Professional & scientific | 2002 |
| Harlow Fields (Mackworth) Residential Management Company Limited | Households | 2015 |
| Harlow Hill Grange (Harrogate) Management Company Limited | Households | 2018 |
| Harlowe Group Limited | Real estate | 2025 |
| Harman Holistix Limited | Information & communication | 2009 |
| Harmil (Marine) Limited | Professional & scientific | 1978 |
| Harmon Energy Systems Limited | Professional & scientific | 2006 |
| Harmonised Designs Limited | Professional & scientific | 2010 |
| Harmony Bridge Limited | Construction | 2017 |
| Harmony Bridge Properties Ltd | Real estate | 2021 |
| Harmony Vitality Trade Ltd | Wholesale & retail | 2024 |
| Harmuk Limited | Professional & scientific | 2014 |
| Harome Homes Ltd | Construction | 2015 |
| Harome Trout Farm Limited | Agriculture & fishing | 2019 |
| Harper Collingworth Limited | Professional & scientific | 2019 |
| Harper Healthcare Limited | Professional & scientific | 2012 |
| HARPER360 Ltd | Administrative & support | 2017 |
| Harpin Enterprises Limited | Financial services | 2023 |
| Harpin Holdco Ltd | Financial services | 2023 |
| Harpin Limited | Transport & logistics | 1990 |
| Harpin Management Limited | Professional & scientific | 2025 |
| Harpin Parkin Aviation Limited | Transport & logistics | 2016 |
| Harrand Letting Limited | Real estate | 2009 |
| Harriet and Henry Limited | Manufacturing | 2018 |
| Harriman Homes Limited | Extraterritorial | 1996 |
| Harringdon Whyte Limited | Professional & scientific | 2019 |
| Harrington Whitley Limited | Professional & scientific | 2018 |
| Harris & Corr Financial Services Limited | Financial services | 2022 |
| Harris & SON Construction (York) Ltd | Construction | 2004 |
| Harrison Blinds Limited | Wholesale & retail | 2005 |
| Harrogate and District BUS Company Limited | Transport & logistics | 2016 |
| Harrogate BUS Company Limited | Transport & logistics | 2016 |
| Harrogate Cleaners Ltd | Other services | 2012 |
| Harrogate Coach Travel Limited | Transport & logistics | 2002 |
| Harrogate Development Managers Ltd | Construction | 2022 |
| Harrogate Hospitality Limited | Hospitality | 2023 |
| Harrogate Independent Travel Limited | Transport & logistics | 2016 |
| Harrogate Physiotherapy Practice Ltd | Health & social care | 2021 |
| Harrogate TAP Limited | Hospitality | 2013 |
| Harrogate Wholesale Meat Company (Scotland) Ltd | Wholesale & retail | 2011 |
| Harrogate Wholesale Meat Company Limited | Wholesale & retail | 2000 |
| Harrow View West (Harrow) Residents Management Company Limited | Households | 2016 |