| HEN Limited | Professional & scientific | 2022 |
| Hench Digital Limited | Information & communication | 2022 |
| Here WE Ltd | Hospitality | 2026 |
| Here WE Prep Ltd | Hospitality | 2023 |
| Hero Automotive Ltd | Wholesale & retail | 2025 |
| HEY BUD Ltd | Wholesale & retail | 2023 |
| Hiam Properties Ltd | Real estate | 2024 |
| Hiam Retail Ltd | Wholesale & retail | 2024 |
| Highland Star Limited | Hospitality | 2021 |
| Hillfield Assets Limited | Real estate | 2025 |
| HKD Properties Scotland Ltd | Real estate | 2025 |
| Hoggies Cafe Limited | Hospitality | 2025 |
| Hollywood Nails Grenock Limited | Other services | 2024 |
| Holt Leisure Holdings Limited | Wholesale & retail | 2024 |
| Holt Leisure Parks Limited | Wholesale & retail | 1968 |
| Holt Leisure Parks Trust Limited | Real estate | 1992 |
| Holten Project Management Ltd | Professional & scientific | 2024 |
| Home FIX Scotland Limited | Construction | 2007 |
| Home Wellness Limited | Professional & scientific | 2014 |
| Homefinders (Inverclyde) Ltd | Real estate | 2011 |
| Honey BEE + Ltd | Other services | 2024 |
| House of IVY Ltd | Other services | 2023 |
| HR Singh Ltd | Wholesale & retail | 2017 |
| HS Bars Ltd | Hospitality | 2019 |
| HS Greenock Limited | Hospitality | 2019 |
| Hudson Venture Limited | Professional & scientific | 2019 |
| Hurrell Property Limited | Real estate | 2025 |
| Hydrographics Scotland Ltd | Construction | 2018 |
| I & SB Associates Ltd | Professional & scientific | 2020 |
| I. Stewart Joiners & Glaziers Limited | Construction | 2006 |
| Iain Crighton Electrical Services Limited | Professional & scientific | 2025 |
| Ibos Turksih Barbers Ltd | Other services | 2022 |
| Ice Allstars CIC | Arts & recreation | 2020 |
| Iconic Watts Limited | Real estate | 2020 |
| Icons Greenock Ltd | Hospitality | 2025 |
| ICP Management Solutions Limited | Professional & scientific | 2004 |
| Imaam FM Ltd | Wholesale & retail | 2025 |
| Image LED Limited | Administrative & support | 2010 |
| IMK786 International Ltd. | Wholesale & retail | 2022 |
| Impressive Designs Ltd | Construction | 2019 |
| In-Work Enterprises Ltd. | Administrative & support | 2015 |
| Inclusive Insights Ltd | Education | 2023 |
| Independent Roof Training Association (Scotland) | Education | 2009 |
| Independent Roof Training Limited | Extraterritorial | 2012 |
| Independent Roof Training Scotland Limited | Education | 2020 |
| Infintex Limited | Professional & scientific | 2026 |
| Inflatables Inverclyde Ltd | Arts & recreation | 2025 |
| Innate Consulting Ltd | Professional & scientific | 2024 |
| Innovades Works Ltd | Information & communication | 2022 |
| Insurv Building Consultancy Limited | Professional & scientific | 2025 |
| Inter Belle UK Ltd | Administrative & support | 2026 |
| Inver Dental Ltd | Health & social care | 2026 |
| Inver-Heat Ltd | Professional & scientific | 2022 |
| Invercare Holdings Limited | Health & social care | 2025 |
| Invercare Services Ltd | Health & social care | 2014 |
| Inverclyde 1:1 Diet Wellness Hub Ltd | Health & social care | 2025 |
| Inverclyde Advice & Employment Rights Centre | Administrative & support | 2007 |
| Inverclyde Bookkeeping & Accounting Services Limited | Professional & scientific | 2012 |
| Inverclyde Carers Centre | Other services | 2006 |
| Inverclyde Community Care Forum | Information & communication | 2004 |
| Inverclyde Community Development Trust | Administrative & support | 1989 |
| Inverclyde Disability Limited | Wholesale & retail | 2018 |
| Inverclyde Distribution Ltd | Transport & logistics | 2021 |
| Inverclyde Electrical Services Limited | Manufacturing | 2015 |
| Inverclyde Enterprises Ltd | Wholesale & retail | 2019 |
| Inverclyde Joinery Limited | Construction | 2016 |
| Inverclyde Kitchen Limited | Hospitality | 2026 |
| Inverclyde Leisure | Arts & recreation | 2001 |
| Inverclyde Leisure Trading Services Limited | Arts & recreation | 2001 |
| Inverclyde Muslim Centre Ltd | Extraterritorial | 2018 |
| Inverclyde Physiotherapy Ltd | Health & social care | 2008 |
| Inverclyde Plumbing & Heating Limited | Other services | 2022 |
| Inverclyde Windows Limited | Manufacturing | 2018 |
| Inverclyde's Windows Limited | Extraterritorial | 2020 |
| Inverdev 1 Limited | Real estate | 2021 |
| Inverflow Property Ltd | Households | 2026 |
| Inverkip Hotel Limited | Hospitality | 1987 |
| Inverkip Road Traders Ltd | Wholesale & retail | 2026 |
| Inverkip Technology Ltd | Information & communication | 2024 |
| Invermed Ltd | Health & social care | 2025 |
| Inverstore (Greenock) Ltd | Transport & logistics | 2017 |
| Inverwraps Limited | Other services | 2020 |
| Investico Scotland Ltd | Real estate | 2022 |
| ISH Properties (One) Ltd | Real estate | 2023 |
| Isotech Insulation Ltd | Professional & scientific | 2026 |
| IVY Design Ltd | Professional & scientific | 2022 |
| J & a Ferguson (1794) Limited | Manufacturing | 2006 |
| J B Audit & Consultancy Ltd | Professional & scientific | 2017 |
| J C Stewart Property Ltd | Real estate | 2019 |
| J Little Fabricating Ltd | Manufacturing | 2023 |
| J Phil Services Ltd | Manufacturing | 2024 |
| J Phillips Services Ltd | Manufacturing | 2019 |
| J Photo-Nics Ltd | Manufacturing | 2024 |
| J&M Access Solutions Ltd | Construction | 2022 |
| J.M. Diving Services Limited | Other services | 2012 |
| Jac-G Ventures Ltd | Other services | 2024 |
| Jachea Ltd | Wholesale & retail | 2012 |
| Jack & Remis Limited | Wholesale & retail | 2023 |
| JAI TEE Care Ltd | Health & social care | 2025 |
| Jai's Thai Limited | Hospitality | 2021 |