| ELG Electrical Services Limited | Construction | 2014 |
| Elite Incorporations Ltd | Construction | 2019 |
| Emerald Tattoo Company Limited | Arts & recreation | 2018 |
| Enigma Flooring Ltd | Construction | 2024 |
| Entrepreneur Hub Limited | Wholesale & retail | 2019 |
| Equi-Bean Ltd | Professional & scientific | 2023 |
| Equi-Jewel by Emily Ltd | Manufacturing | 2020 |
| Espiner Medical Limited | Manufacturing | 1994 |
| Eureka Renovations Ltd | Construction | 2025 |
| Euro World Trading Limited | Professional & scientific | 2022 |
| Eurocaps Limited | Manufacturing | 1993 |
| Event Higher Limited | Administrative & support | 2011 |
| Facial Attraction Beauty Ltd | Other services | 2025 |
| Fairways Extension Management (NO 1) Limited | Households | 1992 |
| Family Vision Limited | Professional & scientific | 1981 |
| FG Rail Consultancy Limited | Hospitality | 2014 |
| Finu Wellbeing C.I.C. | Health & social care | 2025 |
| Firestorm Productions Ltd | Information & communication | 2014 |
| First Choice Roofing Services DM Ltd | Construction | 2026 |
| Fleet Electrical Group Limited | Construction | 2015 |
| FM Property & Investments Ltd | Real estate | 2026 |
| FMK Roofing Services Ltd | Construction | 2024 |
| Focusly Psychology & Assessments Ltd | Health & social care | 2026 |
| Folkmay Limited | Manufacturing | 1980 |
| Follandale Limited | | 1985 |
| Fonicy Ltd | Manufacturing | 2018 |
| Forest Valley Housing Ltd | Construction | 2019 |
| Forrest Surveys Limited | Professional & scientific | 2018 |
| Foundation Housing Response Limited | Real estate | 2022 |
| Foundry 4 X 4 Limited | Wholesale & retail | 2003 |
| Freeways Solutions Ltd | Transport & logistics | 2023 |
| Fresh Active Limited | Arts & recreation | 2016 |
| Frontier Medical Group Limited | Manufacturing | 2013 |
| Frontier Medical Investments Limited | Manufacturing | 2013 |
| Frontier Medical Limited | Manufacturing | 2013 |
| Frontier Medical Products Limited | Professional & scientific | 2006 |
| Frontier Medical Solutions Limited | Manufacturing | 2013 |
| Frontier Therapeutics Limited | Manufacturing | 1990 |
| Fsamz Ltd | Transport & logistics | 2025 |
| FTH Golf Limited | Arts & recreation | 2024 |
| Future NOW Tred Fest Limited | Arts & recreation | 2014 |
| G F S (Surplus Stock) Limited | Wholesale & retail | 1984 |
| G Harris Holdings Limited | Real estate | 2016 |
| G J Davies Limited | Construction | 2009 |
| G Lewis Groundworks Limited | Construction | 2021 |
| G.A.J Rail Ltd | Construction | 2014 |
| G.M.M. Engineering Solutions Limited | Professional & scientific | 2017 |
| Gastoairheating Ltd | Construction | 2021 |
| GC Financial Limited | Financial services | 2015 |
| Genie Care Limited | Manufacturing | 1996 |
| Georgetown Store Limited | Wholesale & retail | 2020 |
| GG Waste Ltd | Wholesale & retail | 2022 |
| GHL Tech Limited | Professional & scientific | 2012 |
| Glan YR Afon Surgery Ltd | Health & social care | 2011 |
| Global Motorise UK Ltd | Wholesale & retail | 2025 |
| Global Reach Care Ltd | Other services | 2012 |
| Glowup Agency Ltd | Information & communication | 2026 |
| Godmachine Ltd | Arts & recreation | 2021 |
| Golden Touch Grooming Ltd | Other services | 2026 |
| Goldfinch Digital Ltd | Information & communication | 2020 |
| Gpem Limited | Professional & scientific | 2024 |
| GPH Property Management Ltd | Households | 2025 |
| Granny's Magic Ltd | Wholesale & retail | 2026 |
| Green Haus Aesthetics Ltd | Wholesale & retail | 2025 |
| Greenlands Energy Ltd | Construction | 2023 |
| Greenlands Heating Ltd | Construction | 2014 |
| Greg Roberts and Co Estate Agents Limited | Real estate | 2010 |
| Griffiths Construction Services Ltd | Professional & scientific | 2022 |
| Grosser&Sons Transport Ltd | Transport & logistics | 2018 |
| Gruber Properties Ltd | Real estate | 2025 |
| GT 17 Limited | Hospitality | 2017 |
| GTS Construction Ltd | Construction | 2020 |
| Gwent Glazing Limited | | 1990 |
| Gwentec Limited | Professional & scientific | 2008 |
| Gymfinity Gymnastics Sports Academy Limited | Arts & recreation | 2016 |
| H&R Construction and Roofing Ltd | Construction | 2021 |
| H-I-M Home Improvement Maintenance Ltd | Construction | 2018 |
| Halo’S Aesthetics Ltd | Other services | 2023 |
| Hand Picked Homes Limited | Real estate | 2019 |
| Hand-D-Man Limited | | 2010 |
| Hard Dance Promotions Ltd | Arts & recreation | 2025 |
| Hare & Moon Provisions Ltd | Wholesale & retail | 2024 |
| Harrico Holdings Ltd | Financial services | 2026 |
| Haymarc Healthcare Ltd | Health & social care | 2013 |
| Hazel & Lily Properties Ltd | Real estate | 2020 |
| Hearts Magic Ltd | Administrative & support | 2018 |
| Heatlink Limited | Construction | 2014 |
| Helping Hands (Rhymney Cancer Self-Help Group) | Health & social care | 2005 |
| Helpserver Limited | Information & communication | 2017 |
| HEO Supermarket Ltd | Wholesale & retail | 2020 |
| Heritage Estates Agents Ltd | Real estate | 2025 |
| Herridge Holdings Limited | Financial services | 2025 |
| Highlife Games Limited | Information & communication | 2014 |
| Hills of Tredegar Limited | Administrative & support | 2013 |
| Hospiner Partnership Limited | Professional & scientific | 2008 |
| Hustle 'N' Health Ltd | Professional & scientific | 2025 |
| HVP Limited | Real estate | 1999 |
| ICG Mcwilliams Limited | Transport & logistics | 2017 |
| Imax Developments Limited | Construction | 2023 |
| Imperium Systems (UK) Ltd | Construction | 2009 |