| Golden Paws Pet Transport Ltd | Transport & logistics | 2018 |
| Gombos Ltd | Real estate | 2013 |
| Good Health (Retford) Limited | Wholesale & retail | 2003 |
| Goodwin Hall Retford C.I.C. | Health & social care | 2014 |
| Goring Medical Projects Ltd | Health & social care | 2019 |
| Gosh Gallery Limited | Wholesale & retail | 2013 |
| Gough Planning and Development Limited | Professional & scientific | 2005 |
| Graceworks Gardens Ltd | Hospitality | 2021 |
| Graham Burr Associates Limited | Professional & scientific | 2001 |
| Grange Sales Associates Limited | Wholesale & retail | 2011 |
| Great Common Properties Ltd | Real estate | 2020 |
| Green Mile Trees Limited | Agriculture & fishing | 2017 |
| Green Space Notts Limited | Real estate | 2022 |
| Greenelm Trading Limited | Wholesale & retail | 2026 |
| Greenfields Animal Hotel Limited | Hospitality | 2002 |
| Greenfish Communications Ltd | Information & communication | 2003 |
| Greens Power Equipment UK Ltd | Manufacturing | 2017 |
| Greg Staples Limited | Arts & recreation | 2015 |
| Greyhaven Consultancy Ltd | Professional & scientific | 2025 |
| Griffin Fire Supplies Limited | Wholesale & retail | 2018 |
| Griffin Fixing Solutions Limited | Construction | 2018 |
| Griffin Fleet Services Ltd | Wholesale & retail | 2021 |
| Griffin Freight Services (Retford) Limited | Transport & logistics | 1997 |
| Grilles & Architectural Products Limited | Manufacturing | 2011 |
| Grip Design & Marketing Limited | Information & communication | 2017 |
| Grounded Construction Ltd | Construction | 2025 |
| Grove Granites Retford Limited | Manufacturing | 2019 |
| Gtsl Retford Ltd | Wholesale & retail | 2016 |
| Guardian Advocates Ltd | Extraterritorial | 2015 |
| Guardian UK Investments Ltd | Financial services | 2023 |
| Guitar Lounge (Retford) Limited | Wholesale & retail | 2022 |
| Gulf Target Ltd | Construction | 2020 |
| Gunpointing Limited | Construction | 2010 |
| GUY Kistell Ltd | Construction | 2013 |
| Guylyn Estates Limited | Extraterritorial | 2011 |
| H Q Engineers Limited | Professional & scientific | 1897 |
| H. C. Barton Ltd | Real estate | 2017 |
| Hadders Limited | Hospitality | 2004 |
| Hair by ZOE Ltd | Other services | 2025 |
| Hair Kabin Limited | Other services | 2002 |
| Hallcroft Fish Bar Limited | Wholesale & retail | 2012 |
| Hallcroft Fishery and Holiday Park Limited | Hospitality | 2020 |
| Hallcroft Holdings Limited | Real estate | 2022 |
| Hallcroft Service Centre Ltd | Wholesale & retail | 2019 |
| Hallcross Properties Limited | Real estate | 2019 |
| Hallgate Offices Limited | Real estate | 2017 |
| Halo Creative Styling Limited | Other services | 2016 |
| Halo Mobile Ltd | Information & communication | 2014 |
| Hammond & Bhar Property Investments Ltd | Real estate | 2019 |
| Hammonds Hobbies Ltd | Wholesale & retail | 2021 |
| Hamsard 3804 Limited | Professional & scientific | 2024 |
| Hancock Funeral Directors Limited | Other services | 2022 |
| Hanford Chiropodists Limited | Professional & scientific | 2013 |
| Hannah Dora Ltd | Arts & recreation | 2022 |
| Hapil Homes Limited | Construction | 2021 |
| Happy Building Company Limited | Construction | 2024 |
| Harben Emarand Limited | Professional & scientific | 2016 |
| Harrison Logistics Ltd | Transport & logistics | 2026 |
| Harrison Training Limited | Administrative & support | 1996 |
| Harrison's Brewery Ltd | Manufacturing | 2019 |
| Harry Burton Farms Ltd | Administrative & support | 2010 |
| Harry's Coffee House Limited | Hospitality | 2013 |
| Harvest Square Management Company Limited | Households | 2020 |
| Harworth Place Limited | Real estate | 2021 |
| Haughton Health Care Limited | Health & social care | 2011 |
| Hawks of Steele Limited | Arts & recreation | 2015 |
| Hawlec Electrical Contractors Limited | Construction | 2011 |
| Hawlec Holdings Limited | Real estate | 2024 |
| Hawthorne M&E Services Ltd | Construction | 2014 |
| Hawthorne Mechanical Services Limited | Construction | 2023 |
| Haxby Developments Ltd | Extraterritorial | 2021 |
| Haxby Incorporated Limited | Professional & scientific | 2026 |
| Hay-Vac Ltd | Manufacturing | 2025 |
| Hayward & Son’S Ltd | Real estate | 2019 |
| Hayward Signature Homes Limited | Construction | 2023 |
| HB Bookkeeper and Legal Cashier Ltd | Professional & scientific | 2020 |
| Hbpw LLP | | 2012 |
| Hbpw PRE Construction Services LLP | | 2024 |
| Hbpw Project Management LLP | | 2025 |
| HD Transport Solutions Ltd | Transport & logistics | 2026 |
| Headlines Beauty Limited | Other services | 2023 |
| Heads Yard Limited | Wholesale & retail | 2017 |
| Health & Safety Zone Limited | Information & communication | 2026 |
| Health Life and Safety Limited | Professional & scientific | 2009 |
| Healthsense Limited | Professional & scientific | 1987 |
| Heart & Home Care Services Ltd | Health & social care | 2025 |
| Heat Demand Ltd | Construction | 2020 |
| Heavy Duty Parts Limited | Wholesale & retail | 1994 |
| HEB Projects Ltd | Professional & scientific | 2025 |
| HEJ International LLP | | 2014 |
| Helen's Hair Stylists Limited | Other services | 2003 |
| Helisky Europe Limited | Transport & logistics | 2018 |
| Hellhound Sports Ltd | Manufacturing | 2025 |
| Hello Meds Ltd | Wholesale & retail | 2021 |
| Hemstock Design Limited | Administrative & support | 1996 |
| Henry Kemp (Road Maintenance) Limited | Construction | 1974 |
| Henry Kemp (Road Markings) Limited | Professional & scientific | 1977 |
| Henry Kemp (Tarmacadam) Limited | Professional & scientific | 1979 |
| Henry Kemp Ltd | Extraterritorial | 2016 |
| Henry Marquees of Retford Limited | Other services | 2025 |