| Frontrowshop Ltd | Wholesale & retail | 2024 |
| FRS Flat Roofing Solutions Limited | Construction | 2015 |
| FUN Miracles Ltd | Arts & recreation | 2022 |
| G L Dunkin Limited | Construction | 2013 |
| G S Electrical Limited | Construction | 2002 |
| Gameplan Media Ltd | Professional & scientific | 2023 |
| Gecko Head Gear Limited | Manufacturing | 2000 |
| Generation Solar Limited | Construction | 2017 |
| Geo-Marquees Limited | Administrative & support | 2015 |
| GHG (Cornwall) Limited | Professional & scientific | 2022 |
| Gifts of Bude Limited | Wholesale & retail | 2016 |
| Gingerdash Limited | Professional & scientific | 2015 |
| Glyn Rees Limited | Hospitality | 2010 |
| Golden Casket (Greenock) Limited | Manufacturing | 1909 |
| Golocal Cuisine Ltd | Wholesale & retail | 2018 |
| Green Stripe Lawn Care (UK) Limited | Other services | 2004 |
| Greenaway & Greenaway Limited | Administrative & support | 1961 |
| Ground Marketing & Design Ltd | Professional & scientific | 2024 |
| Groundswell Technology Consulting Ltd | Professional & scientific | 2014 |
| GTC Environmental Limited | Administrative & support | 2024 |
| Hancock Build & Design Ltd | Construction | 2026 |
| Haven Safety Services Ltd | Professional & scientific | 2020 |
| Hawk Imports Ltd | Wholesale & retail | 2023 |
| Hazeldine Properties Limited | Real estate | 2020 |
| Headland Pavilion (1962) Limited | Real estate | 1962 |
| Hebasca Holdings Ltd | Hospitality | 2021 |
| Hele Valley Residents Association Limited | Households | 2025 |
| Helen's Accountancy Services Ltd | Professional & scientific | 2021 |
| Henlow Ridge Limited | Manufacturing | 2016 |
| Here NOW Films Ltd. | Information & communication | 2019 |
| Here NOW Ventures Ltd | Information & communication | 2025 |
| Heritage Pathfinder Limited | Professional & scientific | 2019 |
| Hilton Fields Consultancy Limited | Professional & scientific | 2014 |
| Hinchen Copy & Consulting Ltd | Information & communication | 2026 |
| Hodgson Insurance Limited | Financial services | 2022 |
| Hogtronix Limited | Professional & scientific | 2003 |
| Holestek Kalmynsi Limited | Health & social care | 2024 |
| Holsworthy and Stratton Agricultural Association | Agriculture & fishing | 1992 |
| Holsworthy Care Services Limited | Extraterritorial | 2016 |
| Holsworthy Motor Club Limited | Arts & recreation | 1980 |
| Hoof Bootique Limited | Extraterritorial | 2018 |
| Hopcroft & Sons Electrical Ltd | Construction | 2025 |
| Hopeful Horizon Homes Ltd | Health & social care | 2025 |
| House of Chaplin Ltd | Hospitality | 2021 |
| HPS Facilities Management Ltd | Construction | 2019 |
| HSB Services (South West) Ltd | Financial services | 2025 |
| Hudson Plumbing and Heating (SW) Ltd | Construction | 2023 |
| Hughes Papers Limited | Real estate | 2005 |
| HV & LV Power Solutions Ltd | Energy | 2024 |
| HW Hair Products Ltd | Wholesale & retail | 2020 |
| I.G. & P.R. Stephens (Farmers) Limited | Agriculture & fishing | 1983 |
| IAN Mill GAS & OIL Limited | Construction | 2023 |
| ICG Cornwall Ltd | Hospitality | 2023 |
| IJS Plumbing & Heating Ltd | Construction | 2026 |
| IM Cleaning Solutions Ltd | Administrative & support | 2015 |
| Inca Outfitters Ltd | Wholesale & retail | 2025 |
| Initium Holdings Limited | Real estate | 2018 |
| INK and Imagination Ltd | Arts & recreation | 2025 |
| Inside OUT Limited | Extraterritorial | 1999 |
| Inspiring Arts CIC | Arts & recreation | 2014 |
| Integer Training Limited | Education | 1999 |
| Internet Generation Limited | Administrative & support | 2026 |
| IRV Holdings Limited | Financial services | 2021 |
| Irvine Landscape Design Limited | Professional & scientific | 2026 |
| IST Management Limited | Professional & scientific | 2018 |
| Ivyleaf Golf Course and Driving Range Ltd | Arts & recreation | 2023 |
| J D Developers Limited | Construction | 2006 |
| J DAW Blast Cleaning Ltd | Manufacturing | 2026 |
| Jack Gear Commercial Ltd | Financial services | 2025 |
| Jack Gear Mortgage Advice Ltd | Financial services | 2020 |
| James & Aldridge Garage Ltd | Wholesale & retail | 2014 |
| James Bray Building Contractor Limited | Construction | 2011 |
| James Marshall West Country Thatching Limited | Construction | 2014 |
| James Miller Dental Ltd | Health & social care | 2014 |
| Jay's AIM Shop Ltd | Wholesale & retail | 2021 |
| JB Groundworks & Utilities Ltd | Construction | 2021 |
| JB Lime Plastering Ltd | Construction | 2010 |
| JEL 04 Limited | Hospitality | 2004 |
| Jenkinson Media Ltd | Arts & recreation | 2022 |
| Jennings & Company Limited | Professional & scientific | 2014 |
| Jenyoga Ltd | Hospitality | 2019 |
| Jesla AK Ltd | Wholesale & retail | 2026 |
| Jess James Limited | Construction | 2011 |
| Jethro Compton Ltd | Arts & recreation | 2010 |
| JEY Retailer Ltd | Wholesale & retail | 2023 |
| Jhlp Ltd | Hospitality | 2015 |
| Joez Catering Ltd | Hospitality | 2025 |
| John Parsons Building Services Limited | Manufacturing | 1998 |
| Josh Jupp Landscapes Limited | Administrative & support | 2021 |
| JS Services (SW) Ltd | Other services | 2024 |
| JSB Motor Investments Limited | Wholesale & retail | 2025 |
| Just Gentz Limited | Other services | 2014 |
| JV Plumbing Services Ltd | Construction | 2026 |
| Jv&Km Properties Limited | Real estate | 2025 |
| JW Rigging Services Ltd | Arts & recreation | 2013 |
| K J Bromell Ltd | Wholesale & retail | 2003 |
| K Wickett Ltd | Agriculture & fishing | 2018 |
| Kalvin J White Ltd | Construction | 2011 |
| Kandu Properties Limited | Construction | 2016 |
| Kate Whitaker Limited | Professional & scientific | 2012 |