| Harmsworth Publishing Ltd | Information & communication | 2022 |
| Harris Hotel (2002) Ltd. | Hospitality | 2002 |
| Harry GOW Limited | Manufacturing | 2019 |
| Hart Wealth Limited | Financial services | 2022 |
| Hartinsure Limited | Financial services | 2019 |
| Harvey House 7 Limited | Real estate | 2019 |
| Haus Architectural & Timber Frame Ltd | Construction | 2015 |
| Hawk NDT Limited | Construction | 2014 |
| Hayes Services Limited | Transport & logistics | 2017 |
| HDR Nationwide Limited | Information & communication | 2025 |
| Headspace Highlands CIC | Information & communication | 2025 |
| Hearach Memorials Ltd | Manufacturing | 2003 |
| Heart 200 Limited | Administrative & support | 2025 |
| Heart 200 Scot Limited | Administrative & support | 2017 |
| Heaste Holdings Ltd | Real estate | 2023 |
| Heatherbell Limited | Professional & scientific | 2022 |
| Heatherhill Limited | Construction | 1998 |
| Heathers Cafe Ltd | Hospitality | 2019 |
| Heathmount Hotel Limited | Hospitality | 2015 |
| Hebridean Whale Cruises Ltd | Administrative & support | 2017 |
| Hebrides.Net Limited | Information & communication | 2009 |
| Hedgedrive Limited | Real estate | 1999 |
| Heightsector Limited | Mining & quarrying | 2015 |
| Heim Build Ltd | Construction | 2022 |
| Held in Grace Counselling Highland Ltd | Health & social care | 2025 |
| Helideck Services Limited | Professional & scientific | 2024 |
| Hello Highlands Ltd | Real estate | 2024 |
| Helping Hand VA Ltd | Administrative & support | 2025 |
| Henderson Group Limited | Wholesale & retail | 2010 |
| Henderson Group Properties Limited | Real estate | 2018 |
| Henderson GRP Limited | Administrative & support | 2016 |
| Henry & Watson Joiners Contractors Ltd. | Other services | 2004 |
| Henry Dickinson Limited | Mining & quarrying | 2024 |
| Heritage Rental Properties Ltd | Real estate | 2021 |
| Hermanas Ltd. | Other services | 2003 |
| Hesling Investments Ltd | Real estate | 2025 |
| Hesling Repairs Ltd | Wholesale & retail | 2017 |
| HEY, Big Dreamer Ltd | Professional & scientific | 2024 |
| HGA (Scotland) Ltd | Financial services | 2023 |
| HGA (UK) Limited | Professional & scientific | 2002 |
| HHA1 LLP | | 2011 |
| HHA2 LLP | | 2012 |
| HHA3 LLP | | 2013 |
| HHA4 LLP | | 2014 |
| HI Adventures Limited | Administrative & support | 2022 |
| Hi-Serv Plant Services Ltd | Construction | 2023 |
| Hidden Glen Homes Limited | Real estate | 2026 |
| HIE Argyll and the Islands | Other services | 1990 |
| HIE Caithness and Sutherland | Other services | 1990 |
| HIE Innse Gall | Administrative & support | 1990 |
| HIE Inverness and East Highland | Administrative & support | 1990 |
| HIE Lochaber | Other services | 1990 |
| HIE Moray | Other services | 1990 |
| HIE Orkney | Other services | 1990 |
| HIE Shetland | Other services | 1990 |
| HIE Skye and Wester Ross | Other services | 1990 |
| HIE Ventures Limited | Financial services | 1995 |
| HIG Joinery Ltd | Construction | 2025 |
| Higgs Tuning Services Ltd | Wholesale & retail | 2020 |
| High AP Limited | Professional & scientific | 2004 |
| High Life Highland | Education | 2011 |
| High Life Highland (Trading) C.I.C. | Education | 2011 |
| High Range Developments Limited | Hospitality | 1972 |
| High Range Holdings 1 Limited | Hospitality | 2024 |
| High Range Holdings 2 Limited | Hospitality | 2024 |
| Highfield Property Services (Inverness) Ltd | Real estate | 2021 |
| Highland Advice and Information Network Limited | Professional & scientific | 1997 |
| Highland Aesthetics Ltd | Other services | 2019 |
| Highland Agricultural Labour Services Limited | Administrative & support | 1996 |
| Highland Air Tightness Testing Limited | Construction | 2010 |
| Highland Airways Limited | Transport & logistics | 2018 |
| Highland Alba Joinery Ltd | Construction | 2018 |
| Highland ALL Terrain Limited | Arts & recreation | 2012 |
| Highland and Grampian Heating Services Ltd | Construction | 2020 |
| Highland Appliance Services Ltd. | Manufacturing | 2003 |
| Highland Asbestos Services Ltd | Water & waste | 2015 |
| Highland ASH Environmental Consultancy Limited | Professional & scientific | 2023 |
| Highland Auto Campers Ltd | Hospitality | 2022 |
| Highland Auto Electrics Ltd | Manufacturing | 2023 |
| Highland Aviation Training Limited | Education | 2009 |
| Highland Bar Services Ltd | Administrative & support | 2009 |
| Highland Bars Ltd | Hospitality | 2026 |
| Highland Bikes Ltd | Wholesale & retail | 2015 |
| Highland Bird Control Services Ltd | Administrative & support | 2025 |
| Highland Blindcraft | Manufacturing | 2000 |
| Highland Bodyshop Car and Commercial Ltd | Wholesale & retail | 2017 |
| Highland Bodyshop Ltd | Manufacturing | 2004 |
| Highland Brokers Ltd | Administrative & support | 2021 |
| Highland Business Associates Limited | Administrative & support | 2012 |
| Highland Business Group Limited | Information & communication | 2025 |
| Highland Business Suites Ltd | Real estate | 2014 |
| Highland Business Women Limited | Other services | 2016 |
| Highland Campers Limited | Manufacturing | 2008 |
| Highland Car Club Limited | Arts & recreation | 1964 |
| Highland Car Wash Ltd | Wholesale & retail | 2023 |
| Highland Caststone Limited | Construction | 2014 |
| Highland Chauffeur Drive Limited | Administrative & support | 2007 |
| Highland Chauffeur Tours Ltd | Administrative & support | 2008 |
| Highland Child Development Centre Ltd | Health & social care | 2024 |
| Highland Christmas Trees Limited | Extraterritorial | 1995 |