| Highland Citizens Advice Bureau Limited | Extraterritorial | 2009 |
| Highland Cleaning Company Ltd | Administrative & support | 2018 |
| Highland Clearance (Recycling) Limited | Wholesale & retail | 2013 |
| Highland Clearance Limited | Wholesale & retail | 1984 |
| Highland Clip Limited | Wholesale & retail | 2024 |
| Highland Coast Hotels Limited | Hospitality | 2019 |
| Highland Coastal Campers Ltd | Hospitality | 2018 |
| Highland Coastal Limited | Agriculture & fishing | 1996 |
| Highland Cold Store Ltd | Transport & logistics | 2008 |
| Highland Commercial Cleaning Limited | Administrative & support | 2014 |
| Highland Commercial Property Ltd | Real estate | 2010 |
| Highland Community Interest Company | Administrative & support | 2021 |
| Highland Concrete Pumping Limited | Construction | 2024 |
| Highland Contracts Ltd | Construction | 2014 |
| Highland COO Properties Ltd | Hospitality | 2026 |
| Highland Copiers Limited | Administrative & support | 2013 |
| Highland Copiers Properties Ltd | Real estate | 2024 |
| Highland Cross | Arts & recreation | 1997 |
| Highland Data Ltd | Construction | 2021 |
| Highland Decorating Services Ltd | Construction | 2013 |
| Highland Deep Clean Services Ltd | Administrative & support | 2013 |
| Highland Deer Management Ltd | Agriculture & fishing | 2020 |
| Highland Deli Pizza Limited | Manufacturing | 2026 |
| Highland Dent Repair Ltd | Wholesale & retail | 2021 |
| Highland Design Concepts Ltd | Professional & scientific | 2018 |
| Highland Design Engineering Limited | Professional & scientific | 2014 |
| Highland Dining Ltd | Hospitality | 2020 |
| Highland Editorial Services Limited | Administrative & support | 2018 |
| Highland Electrical Ltd | Construction | 2018 |
| Highland Engineering Services Ltd | Professional & scientific | 2021 |
| Highland Environmental Restoration Limited | Professional & scientific | 2020 |
| Highland Equine Vets Ltd | Professional & scientific | 2021 |
| Highland Estate Agents Ltd | Real estate | 2016 |
| Highland Estate Sports Ltd | Arts & recreation | 2026 |
| Highland Executive Travel Ltd | Administrative & support | 2024 |
| Highland Feather Fresh Limited | Agriculture & fishing | 2005 |
| Highland Field and Game Ltd | Agriculture & fishing | 2022 |
| Highland Field Sports Fair Limited | Arts & recreation | 1978 |
| Highland Fire Ceilidh Ltd | Arts & recreation | 2019 |
| Highland Fishkeeping Ltd | Wholesale & retail | 2023 |
| Highland Forest Partnership | | 1996 |
| Highland Forklifts Limited | Manufacturing | 2019 |
| Highland Fusion Catering Ltd | Hospitality | 2023 |
| Highland Garden Rooms Ltd | Construction | 2019 |
| Highland Gardens and Grounds Ltd | Agriculture & fishing | 2019 |
| Highland GAS Services Ltd | Construction | 2023 |
| Highland Geotechnical Services Limited | Construction | 2022 |
| Highland Grain (Marketing) Limited | Agriculture & fishing | 1995 |
| Highland Groundcare Limited | Administrative & support | 2012 |
| Highland Guest Services Ltd | Hospitality | 2025 |
| Highland Healthcare Ltd | Wholesale & retail | 2024 |
| Highland Heating Management Limited | Construction | 2006 |
| Highland Highday Ltd | Wholesale & retail | 2024 |
| Highland Hilly Huts Limited | Hospitality | 2022 |
| Highland Historic Buildings Trust | Real estate | 1986 |
| Highland Holiday Lets Ltd | Real estate | 2022 |
| Highland Holiday Lodges Ltd | Hospitality | 2025 |
| Highland Holm Care Ltd | Health & social care | 2026 |
| Highland Home Carers Limited | Health & social care | 2000 |
| Highland Home Extentions Ltd | Construction | 2026 |
| Highland Homeless Trust | Hospitality | 2003 |
| Highland Homely Holiday Rentals Ltd | Hospitality | 2023 |
| Highland Homes and Estates Management Ltd | Real estate | 2022 |
| Highland Homes INV Ltd | Real estate | 2026 |
| Highland Homestays Ltd | Hospitality | 2025 |
| Highland Hospice | Health & social care | 1985 |
| Highland Hospice Trading Limited | Health & social care | 1988 |
| Highland Hospitality Ltd | Hospitality | 2022 |
| Highland Host Management Ltd | Real estate | 2025 |
| Highland Housing Alliance | Other services | 2005 |
| Highland Housing Management Ltd | Households | 2025 |
| Highland Hub Ltd | Administrative & support | 2025 |
| Highland Hyacinth Piercing Ltd | Other services | 2026 |
| Highland Industrial Rope Access-Weldspec Ltd. | Professional & scientific | 2010 |
| Highland Industrial Supplies Limited | Wholesale & retail | 1984 |
| Highland International Food Store Limited | Wholesale & retail | 2016 |
| Highland IT Limited | Information & communication | 2005 |
| Highland Jeep Adventure Ltd | Wholesale & retail | 2021 |
| Highland Joiners & Contractors Ltd | Construction | 2020 |
| Highland Joinery & Glazing Contractors Limited | Manufacturing | 2023 |
| Highland K9 Services Ltd | Water & waste | 2021 |
| Highland Kitchen and Bathrooms Ltd | Wholesale & retail | 2023 |
| Highland Land Management Limited | Administrative & support | 2002 |
| Highland Laser Clinic Ltd | Health & social care | 2019 |
| Highland Lassie Island Cruises Limited | Administrative & support | 2017 |
| Highland Laundry Room Ltd | Other services | 2018 |
| Highland Law Centre Limited | Professional & scientific | 2008 |
| Highland Learning Academy Ltd | Education | 2024 |
| Highland Lettings Ltd | Real estate | 2016 |
| Highland Lift and Shift Ltd | Transport & logistics | 2010 |
| Highland Local Medical Committee Limited | Other services | 2009 |
| Highland Locksmiths & Security Systems Limited | Extraterritorial | 1998 |
| Highland Machinery Dealers & Plant Hire Ltd | Wholesale & retail | 2019 |
| Highland Made Limited | Wholesale & retail | 2019 |
| Highland Maintenance Services Ltd | Households | 2024 |
| Highland Marquee Hire Ltd | Administrative & support | 2021 |
| Highland Masonry Limited | Construction | 2009 |
| Highland Media Group Ltd | Information & communication | 2019 |
| Highland Medical Aesthetics Limited | Health & social care | 2018 |
| Highland Mobile Sauna Ltd | Other services | 2025 |