| 59 Degrees North Limited | Manufacturing | 2019 |
| A W Garson Ltd | Construction | 2022 |
| A Yarn From North Ronaldsay Limited | Manufacturing | 1996 |
| Adrian Breck Services | Construction | 2015 |
| Agentik Ltd | Information & communication | 2024 |
| Alan C Stevenson Ltd | Construction | 2011 |
| Albert Hotel Limited | Hospitality | 1999 |
| Anderson and Groat | | 1997 |
| Auskerry Farming Limited Partnership | | 1994 |
| Ayrenergy Limited | Energy | 2009 |
| B & L Builders (Orkney) Limited | Construction | 2002 |
| B Thomson Building Contractors Ltd. | Extraterritorial | 2012 |
| Baird Retail Limited | Wholesale & retail | 2018 |
| Bayview Transport Limited | Wholesale & retail | 2023 |
| BDS Plant Hire (Orkney) Limited | Construction | 2003 |
| Beccas Bakes Ltd | Manufacturing | 2018 |
| Binscarth Limited | Agriculture & fishing | 2003 |
| Birkett Chambers Limited | Financial services | 2022 |
| Birsay Community Association | Real estate | 2010 |
| Bjro (Holdings) Limited | Professional & scientific | 2022 |
| Bomo Moss | | 1988 |
| Breck Farm Limited | Agriculture & fishing | 2005 |
| Brian Brass Limited | Construction | 2007 |
| Buck Geophysical Limited | Professional & scientific | 2014 |
| Burgar Hill Energy Limited | Energy | 2024 |
| Burgar Hill Renewables Limited | Energy | 2006 |
| Calum W Kirkness Limited | Construction | 2002 |
| Caroline Jane Hair Solutions Ltd | Other services | 2024 |
| Celia Clark Online Limited | Health & social care | 2022 |
| Celtic Dawn Fishing Limited | Agriculture & fishing | 2004 |
| Crantit Dairy | Manufacturing | 1992 |
| Crantit Gates Development Limited | Construction | 2013 |
| Cromarty Hall Trust | Arts & recreation | 2004 |
| D & K Morgan | Agriculture & fishing | 2014 |
| D & M Skea | | 1997 |
| D a Nicol Builder Ltd | Construction | 2025 |
| D J Wards Joinery Ltd | Construction | 2021 |
| D3 Letting Ltd | Real estate | 2013 |
| DCH Joinery Orkney | Construction | 2026 |
| DCH Properties (Orkney) Ltd | Real estate | 2026 |
| Deep Geothermal Power Limited | Energy | 2021 |
| Deerness Distillery Ltd | Manufacturing | 2016 |
| Delor Road Ltd | Hospitality | 2025 |
| Destination Orkney | Other services | 2005 |
| Devonian Scottish Fish Ltd | Mining & quarrying | 2019 |
| Drever & Heddle Trustees Ltd. | Professional & scientific | 2008 |
| E-Tour Orkney Ltd | Transport & logistics | 2025 |
| E. & R. Spence | | 1998 |
| E. Fraser Electrical (Orkney) Limited | Construction | 2003 |
| Earth Fibre Optics Ltd | Information & communication | 2022 |
| East-Garth-Engineering Orkney Ltd | Wholesale & retail | 2021 |
| Eday Partnership | Arts & recreation | 2005 |
| Eoin Muir Plant Hire | Construction | 2023 |
| Erlend Flett Plant Hire | Agriculture & fishing | 1983 |
| Essons Garage Limited | Wholesale & retail | 2002 |
| Eviedale Cottages Ltd | Hospitality | 2026 |
| Eynhallow Systems Engineering Ltd | Information & communication | 2022 |
| Farewell Farms Ltd | Agriculture & fishing | 2007 |
| Feverfew Garden Company Ltd | Wholesale & retail | 2023 |
| First Pick Windows Ltd | Construction | 2020 |
| Foubister Holdings Ltd | Financial services | 2018 |
| Friends of Sanday Kirk Ltd | Arts & recreation | 2022 |
| Friends of the HOY Kirk | Arts & recreation | 2003 |
| Garrett Bros Limited | Manufacturing | 2023 |
| Georth Farms | Agriculture & fishing | 2004 |
| Gestaquoy Ltd | Real estate | 2012 |
| Go Westray CIC | Education | 2016 |
| GP Tech Services Ltd | Information & communication | 2021 |
| Gratitude Worldwide Ltd | Professional & scientific | 2021 |
| Gray & Goar Limited | Construction | 2003 |
| Grieve Associates Ltd | Professional & scientific | 2023 |
| Groundwater Tait Limited | Construction | 2008 |
| Grunkahowe Ltd | Construction | 2022 |
| Gunn Engineering Services (Orkney) Limited | Professional & scientific | 2006 |
| H J Trotter Limited | Transport & logistics | 2017 |
| Habil Properties Ltd | Real estate | 2022 |
| Hair Studio Orkney Ltd | Real estate | 2022 |
| Halcyon Fishing Ltd | Agriculture & fishing | 2026 |
| Hamly Hill Limited | Agriculture & fishing | 2005 |
| Harray Potter Ltd | Wholesale & retail | 2012 |
| Helco Management Solutions Ltd | Professional & scientific | 2024 |
| Highland Brewing Company Limited | Manufacturing | 2004 |
| Holland Papay Ltd | Agriculture & fishing | 2005 |
| Home -Start Orkney | Health & social care | 2005 |
| HOW Farms Limited | Agriculture & fishing | 2011 |
| Hoxa Services Ltd | Professional & scientific | 2025 |
| I Donaldson & Co Limited | Agriculture & fishing | 2004 |
| Island Avian Surveys Ltd | Professional & scientific | 2022 |
| Island Shellfish Limited | Wholesale & retail | 2012 |
| Island Smart Limited | Administrative & support | 2017 |
| Isles Property Ltd | Construction | 2026 |
| J & J Fraser Limited | Agriculture & fishing | 2025 |
| J & N Stevenson Limited | Hospitality | 2021 |
| J & S Allan Limited | Wholesale & retail | 2005 |
| J D Hourie & Co | | 1996 |
| J M Lennie & Co Limited | Agriculture & fishing | 2003 |
| J Sinclair & Co Limited | Agriculture & fishing | 2002 |
| J W R Hourston Electrician Limited | Construction | 2002 |
| J. & R. Marwick Limited | Agriculture & fishing | 2004 |
| James D Peace & Co | Transport & logistics | 1979 |