| Gotham Midco Limited | Financial services | 2022 |
| Gottstaff Ltd | Administrative & support | 2025 |
| Gouldings Car Sales Lincoln Limited | Wholesale & retail | 2000 |
| Gourmetoo UK Limited | Wholesale & retail | 2018 |
| Gowland Homes Ltd | Real estate | 2025 |
| Gowland Property Ltd | Real estate | 2017 |
| GP Logistics and Recovery Ltd | Transport & logistics | 2025 |
| GP Professionals Limited | Professional & scientific | 2023 |
| GR8 Consultants Ltd | Professional & scientific | 2021 |
| GRA Partners Ltd | Manufacturing | 2014 |
| Grace and FOX Ltd | Wholesale & retail | 2022 |
| Grace Recruitment Limited | Administrative & support | 2018 |
| Graceford Group Limited | Financial services | 2024 |
| Gracie Barra Lincoln Ltd | Education | 2025 |
| Gracies Counselling and Advocacy Service Ltd | Health & social care | 2021 |
| Graffoe Advisory Ltd | Professional & scientific | 2013 |
| Graham Barton Groundworks Limited | Construction | 2007 |
| Graham Mathewson Ltd | Professional & scientific | 2025 |
| Graham Offer Ltd | Health & social care | 2010 |
| Graham Reeve Consulting Limited | Information & communication | 2013 |
| Graham Winter Builders Ltd | Construction | 2002 |
| Grain Investments (Humberside) Limited | Construction | 1991 |
| Grain of Truth Bakery Ltd | Manufacturing | 2023 |
| Gralex Computer Services Limited | Information & communication | 2023 |
| Grand Coffee House Limited | Hospitality | 2022 |
| Grande Properties Ltd | Real estate | 2021 |
| Grange Farm Swinderby Ltd. | Agriculture & fishing | 2020 |
| Grange Farm Waste Management Company Limited | Water & waste | 2006 |
| Grange Lane Financial Planning Ltd | Professional & scientific | 2020 |
| Grange Properties Lincoln Limited | Real estate | 2016 |
| Grange Solutions Limited | Administrative & support | 2020 |
| Grantham Ceilings & Interiors Ltd | Construction | 1993 |
| Gratitood Ltd | Financial services | 2025 |
| Gray Games Ltd | Information & communication | 2018 |
| Gray Management Ltd | Construction | 2026 |
| Grayfox Swimming Pools Limited | Construction | 1977 |
| Grayling Mortgage Solutions Limited | Financial services | 2016 |
| Great Arch Consulting Limited | Professional & scientific | 2021 |
| Great Central Land Limited | Financial services | 1996 |
| Great Northern Physiotherapy Ltd | Health & social care | 2014 |
| Great Northern Railway Company Ltd | Arts & recreation | 1999 |
| Greater Lincolnshire Business School Ltd | Extraterritorial | 2026 |
| Greater Lincolnshire College Group Limited | Education | 2016 |
| Greater Lincolnshire Food Partnership CIC | Hospitality | 2024 |
| GREEK2ME Ltd | Hospitality | 2016 |
| Green Albion Limited | Construction | 2013 |
| Green and Purple Software Limited | Information & communication | 2026 |
| Green Barn Garden Buildings Ltd | Wholesale & retail | 2025 |
| Green Barn Timbers Limited | Wholesale & retail | 2019 |
| Green Key Lettings Ltd | Real estate | 2026 |
| Green Key Sales and Lettings Ltd | Real estate | 2016 |
| Green Machines Lincolnshire Limited | Administrative & support | 2023 |
| Green Makeover Ltd | Construction | 2013 |
| Green Mobile Engineering Support Limited | Manufacturing | 2024 |
| Green on Training Limited | Public administration | 2022 |
| Green Produce Trading Limited | Manufacturing | 2018 |
| Green Synergy | Health & social care | 2013 |
| Greenaway Court Limited | Households | 2005 |
| Greenbarn Joinery Ltd | Manufacturing | 2024 |
| Greenborough Management Limited | Professional & scientific | 2003 |
| Greenfield Ruddock Limited | Real estate | 1964 |
| Greenleaf Label Ribbons Limited | Wholesale & retail | 2010 |
| Greenley Investments Limited | Real estate | 2014 |
| Greenlinc Plumbing & Renewables Limited | Construction | 2020 |
| Greenman Haulage Ltd | Transport & logistics | 2024 |
| Greenplan Limited | Other services | 2005 |
| Greenray Energy Solutions Group Limited | Financial services | 2017 |
| Greenray Turbine Solutions Limited | Professional & scientific | 2017 |
| Greenside Test Solutions Ltd | Information & communication | 2016 |
| Greenspace Landscaping Ltd | Administrative & support | 2017 |
| Greenstock Holdings Limited | Manufacturing | 2021 |
| Greenstock Limited | Manufacturing | 1997 |
| Greentech Agriworks Ltd | Agriculture & fishing | 2025 |
| Greenway Assistance Ltd | Transport & logistics | 2021 |
| Greerwest Ltd | Health & social care | 2021 |
| Greestone Limited | Real estate | 2020 |
| Greetwell Gate Management Company Limited | Real estate | 2005 |
| Greetwell Homes Ltd | Professional & scientific | 2018 |
| Greetwell Purchasing Solutions Limited | Hospitality | 2011 |
| Greig Solutions Limited | Professional & scientific | 2021 |
| Grey and Grey Limited | Other services | 2009 |
| Grey and Wolf Properties Ltd | Real estate | 2024 |
| Grey Monkey Limited | Manufacturing | 2016 |
| Grey Willow Developments Limited | Construction | 2010 |
| Greybridge Ventures Ltd | Financial services | 2013 |
| Greycastle Architectural Limited | Professional & scientific | 2024 |
| Greychapel Limited | Real estate | 2024 |
| Greydot Maintenance Limited | Households | 2019 |
| Greyhorses Residents' Association Limited | Households | 1970 |
| Greystones Design & Architecture Ltd | Construction | 2019 |
| Grhorse Limited | Transport & logistics | 2026 |
| Grid Gym Collective Ltd | Arts & recreation | 2021 |
| Grid Line Surveys Lincs Ltd | Professional & scientific | 2024 |
| Gridline Racing Limited | Arts & recreation | 2006 |
| Griffin House Consultancy Limited | Professional & scientific | 2014 |
| Griffin Lane Maintenance Limited | Manufacturing | 2012 |
| Griffin-Young Consultants Ltd | Health & social care | 2014 |
| Grill House Linc Ltd | Hospitality | 2023 |
| Grill House the Black Cat Ltd | Hospitality | 2019 |
| Grill Lincs Ltd | Hospitality | 2026 |