| Garvilland Wind Farm Limited | Energy | 2026 |
| Gary Laird Safety Associates Limited | Public administration | 2018 |
| Gary Lancaster Property Maintenance Limited | Construction | 2020 |
| Gary Wilson Raising Boys' Achievement Limited | Professional & scientific | 2006 |
| GAS Care Huddersfield Limited | Manufacturing | 2012 |
| Gashp Ltd | Information & communication | 2026 |
| Gasiunas Courier Services Ltd | Transport & logistics | 2019 |
| Gaspect Ltd | Construction | 2017 |
| Gateacre Management Limited | Real estate | 2002 |
| Gatehouse Scenics UK Ltd | Manufacturing | 2026 |
| Gazeby Ltd | Real estate | 2023 |
| GB Batteries Ltd | Wholesale & retail | 2021 |
| GB Inter Facilities Ltd | Construction | 2020 |
| GB Inter Security Ltd | Administrative & support | 2012 |
| Gbfm Ltd | Professional & scientific | 2015 |
| GBI Consultancy Ltd | Professional & scientific | 2024 |
| GBJ (TS) Limited | Professional & scientific | 2013 |
| GBM Electrical Ltd | Administrative & support | 2017 |
| Gbmt Properties Ltd | Real estate | 2023 |
| Gbpharm Services Ltd | Health & social care | 2022 |
| Gbvr Holdings Ltd | Construction | 2024 |
| GC Electrical (North) Ltd | Construction | 2012 |
| GC Fabrications(Yorkshire) Ltd | Manufacturing | 2014 |
| Gcek-Uk Limited | Professional & scientific | 2021 |
| Gcew Limited | Health & social care | 2018 |
| GCH Auditing Limited | Construction | 2018 |
| Gcjh Investments Limited | Financial services | 2016 |
| GD Agricultural Services Limited | Manufacturing | 2022 |
| GDCPL1 Limited | Real estate | 2002 |
| Gdea Air Leak Solutions Ltd | Manufacturing | 2025 |
| GDH Transport Ltd | Transport & logistics | 2024 |
| GDM Computer Consultants Limited | Information & communication | 1998 |
| GDN Coaching Ltd | Extraterritorial | 2023 |
| GDS Plumbing & Tiling Ltd | Construction | 2015 |
| GDW168 Ltd | Hospitality | 2026 |
| GE Legacy Ltd | Financial services | 2025 |
| GE Transformation Ltd | Professional & scientific | 2023 |
| GEA Optometry Ltd | Wholesale & retail | 2014 |
| Gear UP Automotive Ltd | Wholesale & retail | 2024 |
| Gearboxesrus Limited | Wholesale & retail | 2025 |
| Gecko Furniture UK Limited | Wholesale & retail | 2010 |
| Geckops Holdings Ltd | Financial services | 2025 |
| Geckops Ltd | Construction | 2008 |
| Gel:Ce Ltd | Construction | 2025 |
| Gelle and Co Ltd | Wholesale & retail | 2023 |
| GEM C E Holdings Ltd | Construction | 2025 |
| GEM Civil Engineering Ltd | Construction | 2014 |
| Gemini Gaming & Events Ltd | Wholesale & retail | 2020 |
| Gemma Favager Travel Ltd | Administrative & support | 2023 |
| Gempos Ltd | Wholesale & retail | 2018 |
| GEN2CO Ltd | Financial services | 2012 |
| Genco Electrical Projects Limited | Construction | 2004 |
| Genco Tech Limited | Manufacturing | 2009 |
| Genesis Supplies Ltd | Wholesale & retail | 2024 |
| Genesis Tyres and Alloys Ltd | Wholesale & retail | 2009 |
| Genius Healthcare Ltd | Wholesale & retail | 2019 |
| Geniusgrab Ltd | Wholesale & retail | 2025 |
| Gentium Tech International Limited | Administrative & support | 2022 |
| Genuine Carers Limited | Health & social care | 2008 |
| Genus Pharmaceuticals Holdings Limited | Wholesale & retail | 1998 |
| Genus Pharmaceuticals Limited | Manufacturing | 1986 |
| Genx Medicare Ltd | Wholesale & retail | 2015 |
| Genymec Ltd | Manufacturing | 2021 |
| GEO Motor (UK) Limited | Wholesale & retail | 2016 |
| Geo-Logical Ltd | Other services | 2019 |
| Geo.H.Haigh & Co,Limited | Construction | 1955 |
| George Graham's Sons and Company Limited | Extraterritorial | 2021 |
| George Lumb Holdings Limited | Professional & scientific | 2004 |
| George WH Shaw Ltd | Administrative & support | 2023 |
| George William Landscapes Ltd | Administrative & support | 2021 |
| Georgia's Kitchen Limited | Hospitality | 2023 |
| Georgie J Cafe Limited | Hospitality | 2025 |
| Georgios Georgiou Ltd | Health & social care | 2014 |
| Geospek Ltd | Construction | 2017 |
| Geospek Soil Engineering Limited | Construction | 2025 |
| German VAG Ltd | Wholesale & retail | 2015 |
| Gerrard Communications Limited | Information & communication | 2012 |
| Gerry's Cafe Limited | Hospitality | 2015 |
| GET Glow Ltd | Information & communication | 2019 |
| GET Graded Ltd | Wholesale & retail | 2023 |
| GF Property Investments Ltd | Real estate | 2024 |
| GFI Group Limited | Professional & scientific | 2009 |
| GG Plastering Ltd | Construction | 2025 |
| Gg’S Housekeeping Ltd | Administrative & support | 2024 |
| GH Mart Ltd | Wholesale & retail | 2021 |
| GH Real Estate Ltd | Real estate | 2014 |
| GHAF4 Contractors Ltd | Construction | 2020 |
| Ghafoor & Sons Ltd | Wholesale & retail | 2021 |
| GHG Assets Ltd | Real estate | 2026 |
| GHL Investments Ltd | Education | 2016 |
| Ghltd Investments Limited | Professional & scientific | 2010 |
| Ghoorun Holdings Ltd | Real estate | 2026 |
| GI Drilling Limited | Construction | 2026 |
| Giallen Limited | Professional & scientific | 2009 |
| GIB Jointing Ltd | Administrative & support | 2017 |
| Gibran Hub Ltd | Wholesale & retail | 2024 |
| Gift Forever Ltd | Wholesale & retail | 2025 |
| GIFTS4KIDS Ltd | Wholesale & retail | 2018 |
| GIG Developments Limited | Construction | 2015 |
| Giggle Boxes Limited | Wholesale & retail | 2017 |