| Greno House Management Company Limited | Households | 2003 |
| Grey EYE Surveillance & Investigation Ltd | Administrative & support | 2024 |
| Grey Horse (Old Town) Ltd | Hospitality | 2020 |
| Greywing Property Ltd | Real estate | 2026 |
| Grimethorpe Colliery Band Limited | Arts & recreation | 2007 |
| Grimethorpe Community Allotments C.I.C. | Agriculture & fishing | 2017 |
| Grimethorpe Hand Car Wash Ltd | Wholesale & retail | 2016 |
| Gripfast Trading Limited | Construction | 2010 |
| Grit - Fitness & Nutrition Limited | Arts & recreation | 2018 |
| Grol Haulage Limited | Transport & logistics | 2023 |
| Groove Connect Ltd | Information & communication | 2025 |
| Groundplay Ltd | Administrative & support | 2014 |
| Groupe Ragni UK Ltd | Manufacturing | 2025 |
| Grow Beneath Ltd | Wholesale & retail | 2023 |
| Grow Financial Solutions Ltd | Professional & scientific | 2021 |
| Growing Past Pain CIC | Education | 2026 |
| GRP Alco Ltd | Wholesale & retail | 2022 |
| Gryphon Administration Limited | Professional & scientific | 2007 |
| Gryphon Developments (Yorkshire) Ltd | Real estate | 2024 |
| GS Grand Holdings Ltd | Financial services | 2023 |
| GSA Community CIC | Education | 2023 |
| GSI1 Ltd | Financial services | 2024 |
| GSL Auto Electrics Ltd | Wholesale & retail | 2025 |
| GSL Fleetlink Ltd | Information & communication | 2026 |
| GT Leisure Parts Ltd | Wholesale & retail | 2021 |
| GT Store Ltd | Wholesale & retail | 2025 |
| Guest Flow Ltd | Professional & scientific | 2025 |
| Guest Plumbing Heating & Electrical Limited | Construction | 2007 |
| Guiding Light Environmental Limited | Administrative & support | 2013 |
| Guinness Propertys Ltd | Real estate | 2019 |
| GUL Immigration & Consultants Ltd | Professional & scientific | 2025 |
| Gunby Yorkshire Limited | Administrative & support | 2019 |
| Gures Holdings Limited | Financial services | 2025 |
| Gurure Limited | Health & social care | 2015 |
| GW Engineering Limited | Manufacturing | 2015 |
| GWH Flooring Limited | Construction | 2015 |
| GXX Ltd | Information & communication | 2018 |
| Gymfix Ltd | Extraterritorial | 2026 |
| H & E Electrical Services Limited | Construction | 2006 |
| H & E Holdings Limited | Real estate | 2016 |
| H & H Classic Car Auctions Limited | Wholesale & retail | 2024 |
| H & H Classic Motorcycle Auctions Ltd | Professional & scientific | 2005 |
| H & H Classics Ltd | Wholesale & retail | 1993 |
| H & H Group Holdings Limited | Professional & scientific | 2008 |
| H & H Surveys Ltd | Construction | 2003 |
| H & J Project Services Limited | Professional & scientific | 2017 |
| H & K Healthcare Limited | Wholesale & retail | 2012 |
| H & L Care Limited | Health & social care | 2018 |
| H & M Cars (Barnsley) Limited | Wholesale & retail | 2011 |
| H & M Display Limited | Wholesale & retail | 2004 |
| H a Property Group Ltd | Real estate | 2024 |
| H and M Rail Ltd | Professional & scientific | 2012 |
| H DA Mota Ltd | Information & communication | 2026 |
| H F C W Property Management Limited | Households | 2005 |
| H M Mitchell Roofing Ltd | Construction | 2025 |
| H R Commercials Ltd | Wholesale & retail | 2023 |
| H S (37) Limited | Administrative & support | 2001 |
| H Squared Developments Ltd | Construction | 2025 |
| H&D Site Services Limited | Administrative & support | 2024 |
| H&H Holdings & Properties Limited | Real estate | 2026 |
| H&H Metal Recycling Ltd | Water & waste | 2021 |
| H&H Prestige Developments Limited | Construction | 2026 |
| H&J Hawks Properties Ltd | Real estate | 2026 |
| H&M Estates Ltd | Real estate | 2014 |
| H&R Group Management Ltd | Administrative & support | 2025 |
| H-Phase Electrical Limited | Construction | 2017 |
| H. & F.N. Smith (Ellis Laithe) Limited | Agriculture & fishing | 1964 |
| H. Brook & Sons (Bretton) Limited | Transport & logistics | 1984 |
| H.E. Payne and Sons Limited | Wholesale & retail | 1985 |
| H.M. Electric (Yorkshire) Limited | Construction | 2011 |
| H2H Estates Ltd | Real estate | 2025 |
| HA HA Investments Ltd | Real estate | 2005 |
| Habit-Abull Leisure Vehicle Services Ltd | Manufacturing | 2023 |
| Hace (UK) Limited | Administrative & support | 2012 |
| Hacketts Florist & Gifts Ltd | Wholesale & retail | 2006 |
| Hadfield Developments UK Limited | Construction | 2016 |
| Hadfield Home Aesthetics Ltd | Administrative & support | 2021 |
| Hafferty Court Management Limited | Real estate | 2004 |
| Hafric Ltd | Arts & recreation | 2020 |
| Hagen Moresby Limited | Other services | 2010 |
| Haigh & Leech Developments Ltd | Real estate | 2026 |
| Haigh Trading (UK) Limited | Wholesale & retail | 2012 |
| Haighs Carpets & Floorings Limited | Wholesale & retail | 2019 |
| Hair at Indulgence Barnsley Limited | Other services | 2018 |
| Hair DOT COM (Barnsley) Ltd | Other services | 2024 |
| Hairline Back Limited | Health & social care | 2021 |
| Hairways by Neringa Ltd | Other services | 2014 |
| Hakiya Limited | Transport & logistics | 2025 |
| HAL Trading Ltd | Wholesale & retail | 2012 |
| Halcyon Cycling Holidays Ltd | Administrative & support | 2022 |
| Halcyon House Beauty Ltd | Other services | 2008 |
| Halcyon Property & Rentals Limited | Real estate | 2025 |
| Halisticare Homecare Ltd | Health & social care | 2024 |
| Hall & Co Risk Management Limited | Professional & scientific | 2001 |
| Hall Close Flats Ltd. | Households | 2017 |
| Hall LEE Fold Management Limited | Professional & scientific | 1997 |
| Hall's Garden Maintenance, Barnsley Ltd | Administrative & support | 2024 |
| Hallroyd Homes Limited | Construction | 2001 |
| Hallroyd Investments Limited | Construction | 1998 |
| Hallwhite Property Ltd | Real estate | 1996 |