| Full House Penzance Limited | Hospitality | 2019 |
| G&G Automobiles Ltd | Wholesale & retail | 2019 |
| Gaia Health LLP | | 2012 |
| Galzig Capital LLP | | 2009 |
| Game on Cornwall Limited | Hospitality | 2022 |
| Games Interactive Limited | Information & communication | 2020 |
| Garms KIT Limited | Manufacturing | 2025 |
| Garry Earley Consultancy Limited | Real estate | 2025 |
| Geevor Trading Limited | Wholesale & retail | 2001 |
| GEM Mint Ltd | Wholesale & retail | 2025 |
| GEM Parts Ltd | Extraterritorial | 2011 |
| Geodrill-Es Limited | Construction | 2017 |
| Georgia Farm Holdings Limited | Financial services | 2015 |
| Georgia Farm Limited | Agriculture & fishing | 2015 |
| Gherkin Property Management Ltd | Real estate | 2024 |
| GI Logics Limited | Professional & scientific | 2013 |
| Gillemot Limited | Agriculture & fishing | 2023 |
| Giltsmiths Limited | Information & communication | 2026 |
| Gizza Limited | Health & social care | 2018 |
| GJ Cattle Limited | Professional & scientific | 2020 |
| GKL Bodyworks Ltd | Wholesale & retail | 2018 |
| GL & TA Developments Limited | Construction | 2019 |
| Glide Health Limited | Health & social care | 2026 |
| Global Marine Engineering Services Ltd | Wholesale & retail | 2025 |
| Glow Forward CIC | Education | 2025 |
| GMR (SW) Ltd | Construction | 2023 |
| Godrevy Terrace Limited | Real estate | 2020 |
| Goes to Show Ltd | Information & communication | 2014 |
| Golowan Festival Community Interest Company | Arts & recreation | 2009 |
| Good Old Furniture Available (Gofa) | Water & waste | 2005 |
| Goodwin Hospitality Ltd | Hospitality | 2022 |
| Gorreydh Ltd | Professional & scientific | 2017 |
| GR Development Services Ltd | Construction | 2018 |
| Grace Cardiology Limited | Health & social care | 2020 |
| Granite and Green Ltd | Administrative & support | 2026 |
| Granite and Salt Ltd | Wholesale & retail | 2025 |
| Grayline (Cornwall) Ltd. | Real estate | 2008 |
| Great Bear Pubs Limited | Hospitality | 2013 |
| Green Circuit Consultancy Limited | Information & communication | 2025 |
| Green Image Limited | Manufacturing | 2008 |
| Green Laundry Cornwall Ltd | Other services | 2024 |
| Green Shoots Cornwall Ltd | Administrative & support | 2025 |
| Green Shoots South West Ltd | Information & communication | 2024 |
| Greenyard Flowers UK Limited | Extraterritorial | 2020 |
| Groki Ltd | Information & communication | 2022 |
| Groktor Ltd | Information & communication | 2011 |
| Growing Links CIC | Agriculture & fishing | 2014 |
| Grown to Graze Ltd | Agriculture & fishing | 2026 |
| Gumatek UK Limited | Manufacturing | 2016 |
| Gwella Kernow Care Ltd | Health & social care | 2024 |
| Gwennel Farm Limited | Agriculture & fishing | 2021 |
| Gwinear Agricultural Association | Education | 2017 |
| H2 Limited | Real estate | 2003 |
| Haggis Orthopaedic Services Limited | Health & social care | 2022 |
| Hago Ltd | Construction | 2020 |
| Haines Homes Limited | Construction | 2017 |
| Haircare Research Group Limited | Wholesale & retail | 2013 |
| Hallegan Limited | Real estate | 2002 |
| Haloppy Limited | Construction | 2025 |
| Hammond Engineering Group Ltd | Professional & scientific | 2025 |
| Harambe Fish Ltd | Hospitality | 2016 |
| Harbour Court Management Company Limited | Administrative & support | 1986 |
| Harbour VUE Ltd | Hospitality | 2020 |
| Harbourside Physiotherapy Ltd | Health & social care | 2003 |
| Hard Rock Security Ltd | Administrative & support | 2019 |
| Harmony Vintage Ltd | Wholesale & retail | 2025 |
| Harrington Aesthetics Ltd | Health & social care | 2023 |
| Harvey Rowe Plumbing & Heating Ltd | Construction | 2023 |
| Hawkins Court Management Company Limited | Households | 1975 |
| Headland Printers Limited | Manufacturing | 1977 |
| Heamoor Chip Shop Limited | Hospitality | 2012 |
| Heart of the Woods CIC | Agriculture & fishing | 2017 |
| Hebe Brand Ltd | Arts & recreation | 2021 |
| Helford River Oysters Ltd | Agriculture & fishing | 2018 |
| Helices Capital Ltd | Professional & scientific | 2021 |
| Helping Hands Cornwall Ltd | Administrative & support | 2020 |
| Helston Arrangements Ltd | Professional & scientific | 2011 |
| Helston Meadery Ltd | Hospitality | 2017 |
| Helston Medical Services Ltd | Wholesale & retail | 2010 |
| Hemingway Medical Limited | Health & social care | 2019 |
| Henrietta Graham Fine Art Limited | Arts & recreation | 2025 |
| Hentronix Ltd | Manufacturing | 2014 |
| HI9 Ltd | Information & communication | 2014 |
| Hickmon Limited | Extraterritorial | 1993 |
| Highthrive Ltd | Information & communication | 2016 |
| Hinoki Productions Ltd | Information & communication | 2023 |
| Hireth Architects Limited | Professional & scientific | 2023 |
| Hirundo Advisory Ltd | Professional & scientific | 2026 |
| Hitchens Carpentry Services Limited | Construction | 2014 |
| HK Penzance Limited | Hospitality | 2025 |
| Hodges Motor Works Limited | Wholesale & retail | 2013 |
| Homegrown Learning Limited | Information & communication | 2019 |
| Homeplanners(Design & Construction)Limited | Real estate | 1965 |
| Honeydew Melon Limited | Hospitality | 2026 |
| Hortensia Farm Ltd | Agriculture & fishing | 2020 |
| Hospitality Staffing Solutions Limited | Hospitality | 2017 |
| Hotel Penzance LLP | | 2015 |
| Houses of Lords Ltd | Hospitality | 2023 |
| Howay Legal Limited | Professional & scientific | 2025 |
| Hudson Medical Care Limited | Health & social care | 2019 |