| GT5000 Ltd | Other services | 2017 |
| GTB Farming Limited | Agriculture & fishing | 2017 |
| Guildford Investments Limited | Real estate | 1959 |
| GW Auto Repairs Limited | Wholesale & retail | 2017 |
| GW Metals Limited | Wholesale & retail | 2026 |
| GWC Electrical Limited | Construction | 2011 |
| GWC Properties Ltd | Real estate | 2018 |
| Gymhood Limited | Information & communication | 2014 |
| Gyropolis Cumbria Limited | Hospitality | 2023 |
| H & H Insurance Brokers Limited | Financial services | 1987 |
| H & O.S Tweedale Limited | Administrative & support | 2022 |
| H H Building Limited | Construction | 2017 |
| H M North Limited | Extraterritorial | 2017 |
| H R Henderson & SON | Agriculture & fishing | 2023 |
| H&H Borderway Limited | Professional & scientific | 1999 |
| H&H Finance Limited | Financial services | 1968 |
| H&H Group Employee Trustee Limited | Professional & scientific | 2023 |
| H&H Group PLC | Administrative & support | 1892 |
| H&L Lashes Ltd | Other services | 2021 |
| H.Nicholson Contracting Ltd | Agriculture & fishing | 2025 |
| H.P.E. Construction Limited | Construction | 1999 |
| HA ANH Property Limited | Real estate | 2024 |
| HAB Supplies Limited | Wholesale & retail | 2026 |
| Habi Group Limited | Financial services | 2021 |
| Hadaf Pro Services Ltd | Health & social care | 2022 |
| Haddon Construction Limited | Construction | 2019 |
| Haddon Homes (Cumbria) Limited | Real estate | 2026 |
| Hadrian A.I. Services Limited | Agriculture & fishing | 2005 |
| Hadrian Homes Limited | Other services | 1992 |
| Hadrian Landscapes Ltd | Administrative & support | 2025 |
| Hadrian M&E Ltd | Professional & scientific | 2012 |
| HAIR@67 Ltd | Other services | 2020 |
| Hairy Barkers Ltd | Other services | 2025 |
| Halcyon Digital Inks Ltd | Wholesale & retail | 2025 |
| Hall Moor Court Management Company Limited | Health & social care | 1994 |
| Hallbank Farm Management Company Limited | Households | 2018 |
| Hallbrook Planning Ltd | Financial services | 2018 |
| Hallwelsh Ltd | Professional & scientific | 2011 |
| Halo LET Property Limited | Real estate | 2026 |
| Halston Homes Ltd | Construction | 2019 |
| Halston Property Holdings Limited | Real estate | 2023 |
| Halton Grange (Halton) Management Company Limited | Households | 2019 |
| Hanabisushi Ltd | Hospitality | 2025 |
| Handle Heroes Limited | Wholesale & retail | 2025 |
| Hannen Carpentry Ltd | Manufacturing | 2022 |
| Hansford Limited | Other services | 2006 |
| Hanson Place Management Limited | Households | 2008 |
| Hansway Holdings Ltd | Other services | 2017 |
| Hardings Garage Ltd | Wholesale & retail | 2026 |
| Hardtech Engineering Services (North) Limited | Construction | 2003 |
| Hardwicke Circus Limited | Arts & recreation | 2016 |
| Harker Garden Buildings Limited | Administrative & support | 2017 |
| Haro Holdings Ltd | Real estate | 2025 |
| Harold George Ltd | Other services | 2006 |
| Harper House of Hair Ltd | Wholesale & retail | 2022 |
| Harpers (West Cumbria) Limited | Wholesale & retail | 2001 |
| Harraby Catholic Club Limited | Hospitality | 2003 |
| Harraby Green Associates Limited | Professional & scientific | 2021 |
| Harris Consultancy Ltd | Professional & scientific | 2025 |
| Harrison & Hetherington Limited | Agriculture & fishing | 1999 |
| Harrison Gardens Management Company Limited | Households | 2018 |
| Harrison Groundworks Limited | Administrative & support | 2014 |
| Harrison Holdings Property Development Limited | Real estate | 2021 |
| Harrison Homes (Cumbria) Ltd | Construction | 2001 |
| Harrison Northern (Licences) Limited | Hospitality | 2025 |
| Harrison Northern Limited | Real estate | 1960 |
| Harrison Northern Properties Limited | Financial services | 2009 |
| Harrison's Store Ltd | Wholesale & retail | 2010 |
| Harrisons (Sykehead) | Agriculture & fishing | 2003 |
| Hartland Harrow Limited | Extraterritorial | 2015 |
| Hartside Cafe Limited | Hospitality | 2019 |
| Harvest Parts Limited | Wholesale & retail | 2012 |
| Hasell Street Management Company Limited | Households | 2011 |
| Hauxdale Ltd | Agriculture & fishing | 2025 |
| Hawk Developments (UK) Ltd | Construction | 1997 |
| Hawk EYE Fitness Limited | Arts & recreation | 2015 |
| Hawksdale Holdings Ltd | Real estate | 2023 |
| Hawksdale Inns Limited | Hospitality | 2019 |
| Hawksdale Limited | Extraterritorial | 1997 |
| Hawksdale Motors Limited | Wholesale & retail | 2012 |
| Hawksdale Pastures Management Company Limited | Households | 2010 |
| Haworth Construction (Cumbria) Ltd | Construction | 2024 |
| Hawthorn Grange (Seaton) Management Company Limited | Real estate | 2018 |
| HAY Feeders UK Ltd | Extraterritorial | 2026 |
| Haydon Bridge Fish & Chips Limited | Hospitality | 2021 |
| Hayes & Ellington Ltd | Professional & scientific | 2024 |
| Hayhurst Contract Services Limited | Real estate | 2016 |
| Hayley Gardiner Property Ltd | Real estate | 2022 |
| Haynes-Heynes Limited | Professional & scientific | 2022 |
| Hayton Construction Limited | Extraterritorial | 2009 |
| Hayton Game Limited | Administrative & support | 2011 |
| Hayton Leisure Limited | Professional & scientific | 2014 |
| Hayton Trading Limited | Construction | 2008 |
| Hayward TOD Associates Limited | Real estate | 2003 |
| HBN Restaurants Limited | Administrative & support | 2001 |
| HBP Monpellier Limited | Information & communication | 2001 |
| HCD Associates Limited | Professional & scientific | 2011 |
| HCS Interior Designs Limited | Construction | 2025 |
| HD Commercial Lettings Ltd | Real estate | 2021 |
| HDL Waste Ltd | Water & waste | 2023 |