| A New EWE Ltd | Other services | 2025 |
| Acoorie Limited | Real estate | 2023 |
| Aeurona Ltd | Information & communication | 2025 |
| Alexandoor Limited | Construction | 2025 |
| AMS Valhalla Ltd | Hospitality | 2023 |
| Blue Loch Lodges Ltd | Hospitality | 2026 |
| Budge Formwork Ltd. | Construction | 2000 |
| C Forbes Plant & Agri Services Ltd | Professional & scientific | 2026 |
| C Mackay Ltd | Agriculture & fishing | 2024 |
| Caithness Broch Project | Professional & scientific | 2013 |
| Caithness Consultancy Ltd | Information & communication | 2022 |
| Caithness Corporate Health Ltd | Health & social care | 2025 |
| CJA Drystone & Garden Services Ltd | Administrative & support | 2025 |
| Class Rooms at the Old School House Ltd | Hospitality | 2026 |
| Clean Glass Ltd | Administrative & support | 2025 |
| DMG Lettings Ltd | Real estate | 2019 |
| Forbescroft Ltd | Manufacturing | 2021 |
| Forspares Ltd | Wholesale & retail | 2023 |
| Gesinc Ltd | Professional & scientific | 2018 |
| GM Fabrication and Welding Ltd | Manufacturing | 2017 |
| Gow's Engineering Services Limited | Professional & scientific | 2014 |
| Gow's Lybster Limited | Administrative & support | 2006 |
| Gunns Coal Ltd | Wholesale & retail | 2004 |
| Happy Heifers Crazy Acres Limited | Agriculture & fishing | 2014 |
| Hargreaves Dairies Limited | Agriculture & fishing | 2025 |
| Hargreaves Farming Co Limited | Agriculture & fishing | 2020 |
| Hendersonsworld Ltd | Agriculture & fishing | 2016 |
| Hillhead Garage Ltd | Wholesale & retail | 2025 |
| HMA Property Holdings Ltd | Real estate | 2025 |
| HMA Property Solutions Ltd | Real estate | 2025 |
| Huematch Ltd | Information & communication | 2025 |
| J & L Mackay Ltd | Agriculture & fishing | 2015 |
| Latheron, Lybster and Clyth Community Development Company | Education | 2006 |
| LIH Qhse Management Ltd | Professional & scientific | 2025 |
| Lochside Croft and Power Ltd | Agriculture & fishing | 2022 |
| Lybster & Tannach | Education | 2016 |
| Mount Pico Consulting Limited | Information & communication | 2020 |
| O'Brien Recycling Ltd | Water & waste | 2010 |
| Outlaw Coms Services Ltd | Professional & scientific | 2024 |
| Portland Fishing Company Ltd | Agriculture & fishing | 2011 |
| Portland Hotel Trading Ltd | Hospitality | 2023 |
| S & F Ganson Ltd | Agriculture & fishing | 2020 |
| Servecom Wick Limited | Administrative & support | 2026 |
| South River Property Ltd | Hospitality | 2022 |
| Tagada Tours Ltd | Real estate | 2025 |