| Garden Mews (Trimdon) Management Company Limited | Households | 2023 |
| Gardiner Electrical & Properties Ltd | Construction | 2024 |
| Gardol Services Ltd | Professional & scientific | 2019 |
| Garnsey Engineering Services Limited | Construction | 2018 |
| Garvey's IT Services Limited | Information & communication | 2017 |
| Garwood Engineering Inspections Ltd | Professional & scientific | 2022 |
| Gary Shiel Contracting Services Ltd | Construction | 2025 |
| Garys Global Investment Limited | Wholesale & retail | 2026 |
| GAS & OIL Limited | Construction | 2003 |
| GAS and Environmental Services Limited | Manufacturing | 1995 |
| GAS North East Limited | Construction | 2008 |
| Gasketline Limited | Manufacturing | 2025 |
| Gateai Ltd | Information & communication | 2023 |
| Gauged Solutions Limited | Professional & scientific | 2011 |
| GB Gritting Services Limited | Administrative & support | 2011 |
| GB- BAP Transfer Limited | Financial services | 2023 |
| GB25 Ltd | Professional & scientific | 2024 |
| GBL Management Limited | Professional & scientific | 2002 |
| GBL Projects (Five) Ltd | Real estate | 2013 |
| GBL Projects (Nine) Ltd | Real estate | 2020 |
| Gblim Limited | Administrative & support | 2021 |
| GBR Logistics Ltd | Transport & logistics | 2026 |
| GC Abrasives Limited | Wholesale & retail | 2019 |
| GC Property Developments Ltd | Construction | 2023 |
| GC Realisations 2025 Ltd | Construction | 2017 |
| Gcse German Tutor Ltd | Education | 2026 |
| GD Trustee Company Limited | Administrative & support | 2014 |
| GDR Services Limited | Professional & scientific | 2019 |
| GE Bond Services Ltd | Construction | 2023 |
| Geeks Group Ltd | Manufacturing | 2020 |
| Gelous Beauty and Laser Ltd | Other services | 2025 |
| Gemca IQ Project Management Services Limited | Professional & scientific | 2019 |
| Gemini Global London Ltd | Hospitality | 2024 |
| GEN X Power Limited | Administrative & support | 2024 |
| Genesis Toys Ltd | Wholesale & retail | 2019 |
| Genpack Ltd | Hospitality | 2022 |
| Gents Style Ltd | Other services | 2026 |
| GEO Building Works Ltd | Construction | 2023 |
| Geophysical Engineering Services Ltd | Professional & scientific | 2011 |
| Geoptic Infrastructure Investigations Limited | Professional & scientific | 2020 |
| George Boro Dinners Ltd | Hospitality | 2024 |
| George F Simpkins Ltd | Administrative & support | 2022 |
| George IB Limited | Construction | 2019 |
| George Street (BC) Limited | Real estate | 2022 |
| GET Jakd Ltd | Wholesale & retail | 2023 |
| Getagentiq Ltd | Professional & scientific | 2019 |
| Getaway Rentals Ltd | Administrative & support | 2023 |
| Gething Logistics Ltd | Professional & scientific | 2025 |
| Getmodas Limited | Transport & logistics | 2024 |
| GFD Trading Limited | Wholesale & retail | 2008 |
| GGC Engineering Limited | Professional & scientific | 2017 |
| GGR Consultants Ltd | Health & social care | 2015 |
| GH Bradford Limited | Real estate | 2023 |
| GH Designz Ltd | Manufacturing | 2026 |
| GH International Ltd | Wholesale & retail | 2023 |
| GH Tax Limited | Professional & scientific | 2021 |
| GHS Structural Limited | Professional & scientific | 2020 |
| GI & RO Haulage Ltd | Transport & logistics | 2026 |
| Giali Mini Market (NE) Ltd | Hospitality | 2025 |
| Gibson Engineering Limited | Manufacturing | 2011 |
| Gibson Motorsport Limited | Manufacturing | 2011 |
| Gibson Properties and Maintenance Ltd | Real estate | 2023 |
| Gibsons Services Ltd | Construction | 2022 |
| Gifted & Blessed Limited | Other services | 2014 |
| Ginger Trading Company Ltd | Wholesale & retail | 2023 |
| Giraffe Connected Solutions Limited | Information & communication | 2006 |
| Gitano Limited | Real estate | 2009 |
| Givetolocal Limited | Information & communication | 2018 |
| GJ Independent Social Care Limited | Health & social care | 2020 |
| GJ Management Ltd | Professional & scientific | 2014 |
| Gkclem Goalkeeping Ltd | Arts & recreation | 2025 |
| Gladstone Projects Ltd | Real estate | 2024 |
| Glamlocks Limited | Other services | 2025 |
| Glaze Group Ltd | Hospitality | 2024 |
| GLC Advance Ltd | Professional & scientific | 2026 |
| Glebe of Taste Limited | Hospitality | 2026 |
| Gledhills Independent Mortgage Services Limited | Administrative & support | 2017 |
| Gledhills Independent Mortgage Specialists Ltd | Administrative & support | 2011 |
| Glee Consulting Ltd | Professional & scientific | 2024 |
| Glentworth Street (DH) Limited | Real estate | 2022 |
| Glions Beauty Ltd | Wholesale & retail | 2025 |
| Global Cabling Services Ltd | Construction | 2015 |
| Global Cart Official Ltd | Wholesale & retail | 2025 |
| Global Plumbing and Heating Limited | Construction | 2020 |
| Global Professional Inspection Services Ltd | Administrative & support | 2019 |
| Global Rebellion Ltd | Professional & scientific | 2021 |
| Globalfluencemgt Ltd | Professional & scientific | 2025 |
| Globe Inter Ltd | Professional & scientific | 2024 |
| Glorious Property Limited | Real estate | 2025 |
| Gloucester House (Stockton) Ltd | Real estate | 2016 |
| Glovix Ltd | Wholesale & retail | 2025 |
| GM & Sons Ltd | Wholesale & retail | 2022 |
| GM Fencing & Decking Ltd | Construction | 2026 |
| GMF Cleveland Enterprise Holdings Ltd | Financial services | 2025 |
| Gmine Ltd | Wholesale & retail | 2025 |
| Gmst Solutions Limited | Financial services | 2019 |
| Go 4 Food Limited | Hospitality | 2021 |
| Go Plans Ltd | Professional & scientific | 2020 |
| Go Sail ME Ltd | Administrative & support | 2018 |
| Golden Square Consultancy Limited | Professional & scientific | 2018 |