| Fernport Management Consultancy Ltd | Professional & scientific | 2026 |
| Ferries Kitchens & Bedrooms Limited | Administrative & support | 2017 |
| Fieldport Limited | Professional & scientific | 2007 |
| Fife Links Limited | Administrative & support | 2004 |
| Finlayson Services Ltd | Administrative & support | 2014 |
| Fiona Stewart Ltd | Other services | 2012 |
| Firth Management Ltd | Real estate | 2015 |
| Fisherman Direct Ltd. | Administrative & support | 2011 |
| Flip of the Coin C.I.C. | Professional & scientific | 2024 |
| Flowstates Consultancy Ltd | Professional & scientific | 2023 |
| FMR Ecosse Limited | Wholesale & retail | 1999 |
| Forbes Commercial Ltd | Wholesale & retail | 2015 |
| Forbovi Limited | Agriculture & fishing | 2018 |
| Foryou Training Ltd | Education | 2023 |
| Foundry Vets Ltd | Professional & scientific | 2023 |
| Fraser Brothers Building Supplies Ltd | Administrative & support | 2017 |
| Fraser Brown Engineering Limited | Administrative & support | 2002 |
| Friends of Fearn Abbey Limited | Education | 2025 |
| Fyrish Construction Services Ltd | Professional & scientific | 2014 |
| G & G Rooney Ltd | Hospitality | 2013 |
| G Campbell (Invernahavon) Ltd | Administrative & support | 2014 |
| G Mackay Fabrication Ltd | Administrative & support | 2012 |
| G Mackay Mechanical Services Ltd | Professional & scientific | 2019 |
| G. Bannerman (Tain) Limited | Wholesale & retail | 1979 |
| Gardenwood Limited | Administrative & support | 1995 |
| Gateside Daycare Ltd | Health & social care | 2026 |
| Geonik Ltd | Administrative & support | 2009 |
| Gill & Company (Brucefield) | Agriculture & fishing | 1956 |
| Glasstorm Limited | Manufacturing | 2009 |
| GLC Technical Limited | Professional & scientific | 2014 |
| Glencourt Limited | Administrative & support | 2002 |
| Glentruim Investments Ltd | Financial services | 2023 |
| Go Highlands Ltd | Administrative & support | 2023 |
| Godsman Tyres & Exhausts Limited | Wholesale & retail | 2003 |
| Gold Moss Ltd | Manufacturing | 2023 |
| Goldworks Scotland Ltd | Other services | 2020 |
| Grant Acquisitions Ltd | Wholesale & retail | 2023 |
| Grant Maclennan Carpentry & Joinery Ltd | Construction | 2014 |
| Greens Petals & Blooms Ltd | Wholesale & retail | 2026 |
| H a Ross (Farmers) Ltd. | Agriculture & fishing | 2002 |
| Hachi Highland Ltd | Construction | 2018 |
| Hannah Technical Services Ltd | Administrative & support | 2025 |
| Harelaw Limited | Professional & scientific | 1999 |
| Haywood Engineering Ltd | Professional & scientific | 2026 |
| Hbac Clinic Ltd | Other services | 2023 |
| Healthcare Environment Consultants Limited | Extraterritorial | 2009 |
| Heaven Bikes Ltd. | Wholesale & retail | 2010 |
| Hector Campbell Services Limited | Construction | 2003 |
| Henko Holdings Ltd | Construction | 2021 |
| Hi-Sat Broadcast Ltd | Information & communication | 2017 |
| Higher Ground Community Services Limited | Administrative & support | 2011 |
| Highland Bucket List Tours Ltd. | Administrative & support | 2024 |
| Highland Construction Trades Ltd | Construction | 2026 |
| Highland Environmental Solutions Limited | Administrative & support | 2006 |
| Highland Event Services Limited | Extraterritorial | 2023 |
| Highland Fine Cheeses Limited | Manufacturing | 1967 |
| Highland First AID Training Ltd | Other services | 2020 |
| Highland Flooring Ltd | Construction | 2020 |
| Highland Jungle Ltd | Administrative & support | 2019 |
| Highland Lassie Loch Ness Ltd | Hospitality | 2025 |
| Highland Lifting Solutions Limited | Construction | 2018 |
| Highland Luxury Catering Services Ltd | Hospitality | 2026 |
| Highland NC500 Adventures Ltd | Hospitality | 2025 |
| Highland Obsession Productions Ltd | Information & communication | 2025 |
| Highland Patissier Ltd | Manufacturing | 2023 |
| Highland Pest Response Ltd | Administrative & support | 2025 |
| Highland Rapeseed OIL Limited | Extraterritorial | 2011 |
| Highland RIG Hand Services Ltd | Administrative & support | 2024 |
| Highland RIG Inspection Limited | Manufacturing | 2013 |
| Highland Roller Doors Limited | Manufacturing | 2004 |
| Highland Seafood Ltd | Hospitality | 2022 |
| Highland Sparks Ltd | Construction | 2021 |
| Highland Wildfire Response CIC | Agriculture & fishing | 2025 |
| Holiday LET Management Orkney Ltd | Real estate | 2023 |
| Hollingwells Equestrian Ltd | Administrative & support | 2019 |
| Home & Hardware (Alness) Ltd | Administrative & support | 2014 |
| Howie Electrical Ltd | Administrative & support | 2018 |
| Hugh Ross Fabrications Ltd. | Administrative & support | 2006 |
| Hydrosurv Ltd | Professional & scientific | 2015 |
| IAC Engineering Ltd. | Wholesale & retail | 2007 |
| Iain Vass Garage Doors Ltd | Administrative & support | 2015 |
| Idonnaekno Construction Ltd | Administrative & support | 2014 |
| IJL Access Solutions Ltd | Administrative & support | 2014 |
| Independent Digital Imaging Solutions Ltd. | Wholesale & retail | 2025 |
| Inganess Bay Ltd | Professional & scientific | 2024 |
| Innes Access & Construction Limited | Mining & quarrying | 2009 |
| Innovation North Ltd | Professional & scientific | 2025 |
| Integrity Safety Training Ltd | Education | 2025 |
| Inverbay Services Limited | Construction | 2017 |
| Inverdrill Limited | Agriculture & fishing | 1997 |
| Invergordon Tours Ltd. | Administrative & support | 2012 |
| Invershore Limited | Professional & scientific | 2014 |
| J a Ross Contractor Ltd | Construction | 2024 |
| J Ross Joinery Ltd | Construction | 2019 |
| J.D. Wood (UK) Ltd. | Professional & scientific | 2011 |
| J.J. Vass & Sons Ltd. | Construction | 2004 |
| Jacomi Services Limited | Construction | 2020 |
| Jake Weld Ltd | Professional & scientific | 2025 |
| James Scott & Company (Fearn) | Agriculture & fishing | 1961 |
| James Urquhart Electrical Contractor Ltd. | Construction | 2002 |