| G & J Social Days Limited | Health & social care | 2025 |
| G Hirst Properties Ltd | Real estate | 2025 |
| G S Roofing Supplies Limited | Construction | 2008 |
| G T Tyres Servicing & MOT Centre Limited | Wholesale & retail | 2021 |
| G&W Contractors Ltd | Construction | 2011 |
| G.N.H Installations Limited | Construction | 2018 |
| Gallons Ltd | Professional & scientific | 2020 |
| Gambit Gaming Limited | Wholesale & retail | 2023 |
| Garside Holdings Ltd | Financial services | 2025 |
| Gary E Holmes Construction Consulting Limited | Professional & scientific | 2019 |
| GAS Wright Plumbing & Heating Ltd | Construction | 2021 |
| Gaslamp Limited | Hospitality | 2024 |
| Gastek Plumbing and Heating Services Ltd | Construction | 2022 |
| Gateford Properties Limited | Real estate | 1995 |
| Gateford Property Holdings Limited | Financial services | 2021 |
| Gazgas Ltd | Construction | 2023 |
| GD Plaster Render Limited | Construction | 2022 |
| Gdee Hope Limited | Manufacturing | 2025 |
| GDI Fitness Limited | Education | 2019 |
| GDM Enterprise Ltd | Wholesale & retail | 2025 |
| GDU Limited | Other services | 2013 |
| GE Global Ltd | Hospitality | 2021 |
| Gemstoneexperts Limited | Manufacturing | 2023 |
| Genesis 19 Ltd | Wholesale & retail | 2020 |
| Gentle Hands 24 Hour Care Services Limited | Health & social care | 2023 |
| George & Dragon Mexborough Limited | Hospitality | 2019 |
| Geridian Oilfield Ltd | Administrative & support | 2005 |
| GG Emergency Door Specialists Limited | Manufacturing | 2020 |
| Gg(Uk) Ltd | Transport & logistics | 2019 |
| GHC Consulting Ltd | Professional & scientific | 2018 |
| Gherghe Ltd | Transport & logistics | 2025 |
| Gherhes Trans Ltd | Transport & logistics | 2018 |
| Gibbs Cateringware Ltd | Wholesale & retail | 2023 |
| GL Beal Building Contractors Limited | Construction | 2014 |
| Glassprint Limited | Manufacturing | 2017 |
| GLD Financial Consultants Limited | Financial services | 2016 |
| Glenrose Limited | Real estate | 2004 |
| Global Supplies and Engineering Limited | Wholesale & retail | 2010 |
| Globalblend Limited | Real estate | 2009 |
| Glossé Nail House & Academy Ltd | Other services | 2026 |
| GNA Builders Ltd | Construction | 2019 |
| GOA Spice MEX South Limited | Hospitality | 2025 |
| Goni 1627 Limited | Construction | 2015 |
| Gosia Ltd | Hospitality | 2024 |
| GP Mech Services Ltd | Wholesale & retail | 2015 |
| Graham Company Group Limited | Information & communication | 2021 |
| Graham Company Holdings Limited | Financial services | 2021 |
| Green Bell LLP | | 2023 |
| Greenhedges Holdings Limited | Administrative & support | 2015 |
| Greens Electric Maintenance and Sons Ltd | Construction | 2024 |
| Greenwood Engineering Services Ltd | Manufacturing | 2003 |
| Greg Barnes Engineering Limited | Professional & scientific | 2025 |
| Grevch Ltd | Real estate | 2022 |
| Grey Raven Ltd | Information & communication | 2025 |
| Griffin Vale Ltd | Households | 2024 |
| Griffiths Midland Ltd | Administrative & support | 2019 |
| Growth Analytics Ltd | Information & communication | 2023 |
| GSJ Tiling Ltd | Construction | 2019 |
| GTS Garage Services Ltd | Wholesale & retail | 2018 |
| Guckian Fisher Limited | Health & social care | 2009 |
| GUY Robin Associates Limited | Arts & recreation | 2018 |
| GUY Stevenson Medical Limited | Health & social care | 2013 |
| GWS Car Sales Ltd | Wholesale & retail | 2018 |
| Gwynette News Ltd | Wholesale & retail | 2009 |
| H Y Pizza & Kebab Limited | Hospitality | 2025 |
| H.C. Consultants Limited | Construction | 2019 |
| H4 Property Investments Ltd | Real estate | 2021 |
| H4 Recycling Limited | Water & waste | 2016 |
| Hadfield Roofing and Cladding Limited | Construction | 1989 |
| Hair by Lauren (Yorkshire) Limited | Other services | 2024 |
| Hair@Dark Limited | Other services | 2026 |
| Halksworth Holdings Limited | Financial services | 2026 |
| Hammerton Schorah (Wombwell) Limited | Other services | 1974 |
| Hargreaves Group Holdings (Yorkshire) Limited | Administrative & support | 2013 |
| Haribugs Limited | Wholesale & retail | 2008 |
| Harleys Hair & Beauty Limited | Other services | 2011 |
| Harris & Duke Properties Ltd | Real estate | 2023 |
| Harv Estates Ltd | Real estate | 2022 |
| Haven Property Company Limited | Real estate | 2006 |
| HC Building Enterprise Ltd | Construction | 2025 |
| HD Bespoke Carpentry Ltd | Manufacturing | 2025 |
| Heatley Retail Limited | Wholesale & retail | 2022 |
| Heavenly Hairspray LLP | | 2019 |
| Hector James Limited | Wholesale & retail | 2018 |
| Heeley Consultancy Limited | Professional & scientific | 2022 |
| Heesan Trade Ltd | Wholesale & retail | 2023 |
| Heesan Trading Ltd | Wholesale & retail | 2022 |
| Helen Fisher Design Ltd | Professional & scientific | 2022 |
| Helex Digital Ltd | Wholesale & retail | 2025 |
| Helix Counselling Ltd | Health & social care | 2022 |
| Hennessey Holdings Limited | Financial services | 2026 |
| Henworth Construction Limited | Administrative & support | 2021 |
| Henworth Developments Limited | Construction | 2024 |
| Henworth Mechanical & Electrical Limited | Construction | 2025 |
| Henworth North Limited | Financial services | 2024 |
| Heritage Holdings & Investments Limited | Real estate | 2022 |
| Heron Trustee Services Limited | Financial services | 2017 |
| Hessman Limited | Construction | 2019 |
| HEX and Halo Tattoo & Craft Ltd | Arts & recreation | 2026 |
| HH Electrical Contractors Ltd | Manufacturing | 2025 |