| Grilliano Ltd | Hospitality | 2022 |
| Grillin N Chillin Ltd | Hospitality | 2024 |
| Grimer Limited | Wholesale & retail | 2026 |
| Grindtec (Lincs) Limited | Agriculture & fishing | 2013 |
| Grizzly Works Limited | Transport & logistics | 2025 |
| Grobins Haulage Ltd | Transport & logistics | 2024 |
| Grom Tech Limited | Manufacturing | 2021 |
| Gromate Limited | Wholesale & retail | 2025 |
| Grosha Investment Ltd | Real estate | 2024 |
| Groteq Horticulture Ltd | Agriculture & fishing | 2020 |
| Ground Equipment Supplies Limited | Manufacturing | 1994 |
| Ground Level Ministry Team | Other services | 1989 |
| Grounded & Curious Ltd | Health & social care | 2026 |
| Grounded Parenting Ltd | Education | 2026 |
| Group Hold Ltd | Financial services | 2020 |
| Grove Farm Glamping Ltd | Hospitality | 2019 |
| Grove Wood Hill Consultancy Services Limited | Professional & scientific | 2019 |
| Grow Mental Health Limited | Health & social care | 2024 |
| Grow Minds Coaching Ltd | Education | 2025 |
| Growing Curious Children Ltd | Education | 2025 |
| Growing Futures Lincoln Ltd | Information & communication | 2013 |
| Growing Opportunities Limited | Agriculture & fishing | 2010 |
| Growth Agronomy Services Ltd | Agriculture & fishing | 2024 |
| Growth AI Limited | Information & communication | 2024 |
| Growthinc Ltd | Information & communication | 2020 |
| Grubb Street Media Limited | Professional & scientific | 2011 |
| Grundy Enterprises Limited | Professional & scientific | 1994 |
| Grundy Plumbing and Heating Limited | Construction | 2021 |
| Grundys Property Ltd | Financial services | 2025 |
| Grundys Roofing Ltd | Construction | 2015 |
| Gryphon's Hoard Ltd | Manufacturing | 2026 |
| GS Smith Properties Ltd | Real estate | 2026 |
| GSB Surface Preparation Ltd | Construction | 2009 |
| GSL Rentals Limited | Real estate | 2015 |
| GSM Training Ltd | Information & communication | 2024 |
| GT Auto Body & Paint Solutions Ltd | Wholesale & retail | 2016 |
| GT Energy (Wythenshawe) Limited | Professional & scientific | 2026 |
| GT Energy Croatia Limited | Professional & scientific | 2023 |
| GT Energy UK Limited | Professional & scientific | 2013 |
| GT Fitness Limited | Arts & recreation | 2022 |
| GTM Tiling Ltd | Construction | 2024 |
| Gtohero Limited | Information & communication | 2024 |
| GTS UK Holdings Ltd | Financial services | 2023 |
| Guiding Star Healthcare Services Ltd | Public administration | 2025 |
| Guild Decorators Limited | Construction | 2001 |
| Guildford Dermatology Ltd | Health & social care | 2019 |
| Guildhall Barbers Limited | Other services | 2012 |
| Guildhall Jewellers (Lincoln) Ltd | Wholesale & retail | 2011 |
| Guildstone Construction Ltd | Construction | 2026 |
| Guildstone Developments Ltd | Construction | 2026 |
| Guinness Wealth Management Limited | Financial services | 2026 |
| Gunness Electrical Limited | Construction | 2019 |
| Gupta News Limited | Wholesale & retail | 2010 |
| Gurnhill Plumbing and Heating Limited | Construction | 2018 |
| GUS Supplies Ltd | Wholesale & retail | 2014 |
| GUT Instinct Ltd | Professional & scientific | 2018 |
| GUY Baker Joinery Ltd | Construction | 2015 |
| GWB Safety Solutions Limited | Professional & scientific | 2006 |
| Gwen's Cafe Ltd | Hospitality | 2023 |
| Gwilym Hayes Limited | Health & social care | 2009 |
| Gwynnes Club Limited | Hospitality | 2016 |
| Gwynnes Sports Club Ltd | Hospitality | 2023 |
| Gynaecological Ultrasound Services Limited | Health & social care | 2005 |
| Gynaecology and Fertility Services Ltd | Health & social care | 2011 |
| Gynaecology Ltd | Health & social care | 2012 |
| Gynovation Consulting Limited | Education | 2024 |
| H & H Retail Solutions Limited | Wholesale & retail | 2011 |
| H Betts Developments Ltd | Construction | 2026 |
| H MAC Interiors Ltd | Construction | 2023 |
| H Mcginn Ltd | Health & social care | 2023 |
| H Plant Ltd | Administrative & support | 2026 |
| H S Gosal Ltd | Health & social care | 2009 |
| H Saleh Ltd | Health & social care | 2009 |
| H&H Nexus Ltd | Wholesale & retail | 2026 |
| H&M Consultancy Limited | Real estate | 2012 |
| H&R Grouf UK Ltd | Wholesale & retail | 2025 |
| H.C.G.Heating Construction Limited | Construction | 1973 |
| H.R. Solutions (GB) Limited | Administrative & support | 2004 |
| H2AAA Logistics Ltd | Real estate | 2025 |
| H2H Community Care Ltd | Health & social care | 2021 |
| H2INSPIRE Ltd | Professional & scientific | 2025 |
| H5 Homes Ltd | Real estate | 2019 |
| HA Developments (Lincoln) Limited | Construction | 2023 |
| HABIT5 Limited | Professional & scientific | 2013 |
| Habitat IQ Systems Limited | Professional & scientific | 2026 |
| Hackthorn Film Productions Limited | Information & communication | 2025 |
| Hackthorn Manor Limited | Agriculture & fishing | 1976 |
| Haddon House Management Company Limited | Real estate | 2002 |
| Haig Group Services Limited | Professional & scientific | 2023 |
| Haig Legal Group Limited | Professional & scientific | 2015 |
| Hailea Limited | Agriculture & fishing | 2019 |
| Hainton House Management Limited | Households | 2011 |
| Hair by Chloe Limited | Other services | 2012 |
| Hair by Esme Ltd | Real estate | 2024 |
| Hair Dressing Supplies Lincoln Ltd | Wholesale & retail | 2016 |
| Hair Gallery KLC Ltd | Other services | 2019 |
| Hairdos by TJ Limited | Administrative & support | 2025 |
| Hairworks Lincoln Ltd | Other services | 2025 |
| Halats Ltd | Wholesale & retail | 2015 |
| Halats Properties Ltd | Households | 2025 |