| Gree Spot Ltd | Wholesale & retail | 2026 |
| Greedy’S Kitchen Ltd | Hospitality | 2024 |
| Greek Food & Pastries (GFP) Ltd | Hospitality | 2023 |
| Greek Village 1 Ltd | Hospitality | 2023 |
| Greek Village 2 Ltd | Hospitality | 2021 |
| Green & Hill Investments Limited | Financial services | 2026 |
| Green 35 Limited | Construction | 2024 |
| Green Acre Environmental Group Limited | Financial services | 2025 |
| Green and Jenks Ltd | Wholesale & retail | 2016 |
| Green Arrow Consultancy Ltd | Administrative & support | 2020 |
| Green Arrows Ltd | Wholesale & retail | 2024 |
| Green Baloon Limited | Information & communication | 2021 |
| Green Bio-Technologies Limited | Information & communication | 2020 |
| Green Boots Media Ltd | Information & communication | 2024 |
| Green Business Advisory Services Ltd | Professional & scientific | 2014 |
| Green Business Centre Wales Limited | Professional & scientific | 2010 |
| Green Cedar Innovation Co., Ltd | Wholesale & retail | 2021 |
| Green Chain Resources Ltd | Professional & scientific | 2025 |
| Green Choice Environment Limited | Information & communication | 2020 |
| Green Circle Recruitment Limited | Administrative & support | 2026 |
| Green Collar Properties Ltd | Real estate | 2025 |
| Green Collect Ltd | Information & communication | 2023 |
| Green Cool UK Ltd | Energy | 2014 |
| Green Court (Cardiff) Limited | Real estate | 2016 |
| Green Door Bakery Limited | Wholesale & retail | 2017 |
| Green Eclipse Limited | Manufacturing | 2020 |
| Green Ends Management Limited | Households | 2022 |
| Green Energy Electrical Contractors Limited | Construction | 2023 |
| Green Energy Heating Limited | Construction | 2023 |
| Green Energy Power Ltd | Professional & scientific | 2024 |
| Green Energy Taxis (GET) Ltd | Transport & logistics | 2020 |
| Green Frog Power Limited | Professional & scientific | 2021 |
| Green Generation Energy Networks Cymru Limited | Energy | 2020 |
| Green Globe Awards Limited | Other services | 2020 |
| Green Group Recycling Essex Ltd | Wholesale & retail | 2019 |
| Green Grow Energy Limited | Financial services | 2025 |
| Green Haven Garden Services Ltd | Administrative & support | 2026 |
| Green Heat Wales Ltd | Construction | 2009 |
| Green HLD Ltd | Education | 2025 |
| Green Holland Ltd | Wholesale & retail | 2025 |
| Green Home Builders Ltd | Construction | 2025 |
| Green Home Improvements Ltd | Construction | 2024 |
| Green Home Property Solutions Ltd | Construction | 2020 |
| Green House Property Services Ltd | Households | 2025 |
| Green Jade Herbal Therapies Limited | Other services | 2018 |
| Green Lamp Capital Limited | Financial services | 2018 |
| Green Lantern Services Limited | Extraterritorial | 2019 |
| Green Leaf PR Ltd | Professional & scientific | 2010 |
| Green Machine Cardiff Limited | Administrative & support | 2024 |
| Green Marketing Ltd | Administrative & support | 2016 |
| Green Mart Ltd | Wholesale & retail | 2024 |
| Green Meadow Court (Whitchurch) Maintenance Limited | Households | 1962 |
| Green Medics Limited | Administrative & support | 2021 |
| Green Mobiles Limited | Wholesale & retail | 2025 |
| Green Oak Property Ltd | Real estate | 2025 |
| Green Olive Films (UK) Ltd | Information & communication | 2013 |
| Green Oval Remarketing Ltd | Wholesale & retail | 2021 |
| Green Pistachio Limited | Wholesale & retail | 2025 |
| Green Recycling Solutions Ltd | Wholesale & retail | 2021 |
| Green Room Coaching Ltd | Health & social care | 2026 |
| Green Sea Guard Ltd | Manufacturing | 2014 |
| Green Shoots Locations CYF. | Information & communication | 2024 |
| Green Sky Interior Limited | Construction | 2017 |
| Green Sky Ltd | Hospitality | 2019 |
| Green Sky Props Ltd | Information & communication | 2023 |
| Green Solution Engineering Limited | Professional & scientific | 2020 |
| Green Soul Urban Garden CIC | Agriculture & fishing | 2024 |
| Green Springs Estates Ltd | Real estate | 2019 |
| Green Squirrel CIC | Education | 2015 |
| Green Task Force (Cymru) Limited | Transport & logistics | 2011 |
| Green Voices CIC | Education | 2025 |
| Green Way Trading International Ltd | Water & waste | 2025 |
| Green Willow Funerals Limited | Other services | 1997 |
| Green Wing Sustainability Ltd | Information & communication | 2023 |
| Green XP Africa Ltd | Information & communication | 2026 |
| GREEN2SCREEN Ltd | Information & communication | 2020 |
| Greenacre Racing Partnership Limited | Arts & recreation | 1997 |
| Greenacres Palmerston Management (NO.1) Limited | Households | 1992 |
| Greenapath Ltd | Professional & scientific | 2025 |
| Greenaway Financial Planning Limited | Professional & scientific | 2020 |
| Greenaway Scott Ventures Ltd | Financial services | 2018 |
| Greenbargains Initiative Ltd. | Professional & scientific | 2024 |
| Greenberg Consulting Ltd | Professional & scientific | 2025 |
| Greenbuild Consult Holdings Limited | Financial services | 2019 |
| Greenclearuk Ltd | Water & waste | 2025 |
| Greenclose Group Limited | Financial services | 2026 |
| Greencyber Limited | Professional & scientific | 2024 |
| Greencyber Research Limited | Professional & scientific | 2024 |
| Greendelivery Limited | Wholesale & retail | 2018 |
| Greendown Properties Ltd | Real estate | 2019 |
| Greenerbydesign Ltd | Professional & scientific | 2012 |
| Greenfamily Ltd | Professional & scientific | 2013 |
| Greenfield Contractors Ltd | Administrative & support | 2012 |
| Greenfield Gear Hire Limited | Administrative & support | 2025 |
| Greenfield Medical and Sports Consulting Limited | Health & social care | 2015 |
| Greenfield Road Building Company Limited | Construction | 1968 |
| Greenfields Agricultural Projects Ltd | Agriculture & fishing | 2024 |
| Greenfields Produce Ltd | Wholesale & retail | 2019 |
| Greenfields Rentals Ltd | Administrative & support | 2025 |
| Greenfind Property Management Limited | Real estate | 1989 |