| Heart to Heart Travel & Treats Limited | Wholesale & retail | 2026 |
| Heart&Feints Limited | Professional & scientific | 2014 |
| Heartconsciousness LP | | 2019 |
| Heartdoc Ltd | Health & social care | 2022 |
| Heartful Services Ltd | Wholesale & retail | 2019 |
| Heartfulhealth Innovations Ltd | Extraterritorial | 2025 |
| Hearth & Star CIC | Professional & scientific | 2026 |
| Hearth Architects Ltd | Professional & scientific | 2021 |
| Hearth Park Limited Partnership | | 2019 |
| Hearths of Edinburgh Ltd | Real estate | 2024 |
| Hearthsaga Limited | Information & communication | 2017 |
| Hearthstone Investments (Scotland) Limited | Financial services | 2014 |
| Heartivity LP | | 2025 |
| Heartland Hearing Ltd | Wholesale & retail | 2021 |
| Heartlands Properties Management Limited | Real estate | 2004 |
| Heartpolitics Ltd | Education | 2019 |
| Hearts and Minds Limited | Health & social care | 1997 |
| Heartway Productions LP | | 2025 |
| Heartwood Tree Care Ltd | Administrative & support | 2020 |
| Hearyou Counselling UK Ltd | Education | 2022 |
| Heat Network Scotland Limited | Other services | 2026 |
| Heat Tech Scotland Ltd | Construction | 2023 |
| Heatfactors Limited | Construction | 1982 |
| Heatflo Solutions Ltd | Construction | 2026 |
| Heathcote SLP | | 2002 |
| Heather Hills Hospitality Ltd | Hospitality | 2012 |
| Heather Young Equine Services Limited | Arts & recreation | 2021 |
| Heather-Fresh Cleaning Service Ltd | Administrative & support | 2025 |
| Heathrow Elements B.V. | | 2023 |
| Heathrow Elements Limited | Real estate | 2021 |
| Heathvord Services LP | | 2012 |
| Heathwaite Care Homes Limited | Hospitality | 2005 |
| Heatmasters (Scotland) Ltd | Construction | 2025 |
| Heatsource Plumbing & Heating Limited | Construction | 2015 |
| Heatsource Plumbing & Heating Services Ltd | Extraterritorial | 2019 |
| Heattech GAS Services Ltd | Construction | 2021 |
| Heatwise (Edinburgh) Ltd | Construction | 2025 |
| Heatwise Energy Advice Ltd | Information & communication | 2023 |
| Heatwise Property Solutions Ltd | Real estate | 2025 |
| Heatworks Operations Ltd | Other services | 2026 |
| Heatx Trading Ltd | Wholesale & retail | 2026 |
| Heaven Beauty Limited | Other services | 2016 |
| Heavenly Scran Ltd | Hospitality | 2025 |
| Heavy Commercial Services L.P. | | 2012 |
| Heavy Dough Ltd | Hospitality | 2026 |
| Heavy Elevator Music Ltd | Information & communication | 2021 |
| Heavy Industry Projects Development LP | | 2014 |
| Heavy Parts Solutions L.P. | | 2019 |
| Heavy Technology L.P. | | 2012 |
| Heavylift Group Scotland Ltd | Construction | 2022 |
| Hebann Ltd | Wholesale & retail | 2025 |
| Hebe Labs LP | | 2013 |
| Hebeakarmoury Ltd | Administrative & support | 2025 |
| Hebert Metals LP | | 2016 |
| Hebrew Healthcare Limited | Health & social care | 2023 |
| Hebrew Synagogue | Other services | 2020 |
| Hebridean Hideaways Ltd | Hospitality | 2016 |
| Hebridean Nature Solutions Ltd | Manufacturing | 2023 |
| Hebridean Services Limited | Other services | 2022 |
| Hebridean Whisky Trail Limited | Administrative & support | 2020 |
| Hebrides Ensemble | Arts & recreation | 1991 |
| Hebrides West END Ltd | Hospitality | 2022 |
| Hebro Associates L.P. | | 2009 |
| HEC Homes (Scotland ) Ltd | Manufacturing | 2024 |
| Hechpictious Ltd | Wholesale & retail | 2024 |
| Hectic Properties Ltd | Real estate | 2023 |
| Hector Global L.P. | | 2015 |
| Hectorson Ltd | Information & communication | 2022 |
| Hed.Spa Ltd | Other services | 2019 |
| Hedge Management Consulting LP | | 2018 |
| Hedon Tandem L.P. | | 2011 |
| Heeeven Ltd | Information & communication | 2026 |
| Heehaw Limited | Information & communication | 2000 |
| Heera Properties Edinburgh Limited | Households | 2020 |
| Hefesto SP | | 2001 |
| Hefzybeacon Atelier Limited | Wholesale & retail | 2026 |
| Hegard Energy LP | | 2015 |
| Hegarty Solutions LP | | 2012 |
| Heggie & Co Wealth Advisory Limited | Professional & scientific | 2026 |
| Heid Certification Ltd | Other services | 2025 |
| Heineken UK Group Life Scheme Trust Company Limited | Professional & scientific | 2012 |
| Heineken UK Limited | Manufacturing | 1978 |
| Heiritage Holdings Ltd | Real estate | 2025 |
| Hekaton Ltd | Professional & scientific | 2026 |
| Hekla Communications Limited | Professional & scientific | 2016 |
| Held in OUR Hearts Limited | Health & social care | 2010 |
| Helder Maritime UK Limited | Administrative & support | 2025 |
| Helen Bateman Limited | Administrative & support | 2001 |
| Helen Chambers Consulting Ltd | Professional & scientific | 2021 |
| Helen Gardiner Limited | Health & social care | 2021 |
| Helen Lowe Limited | Professional & scientific | 2014 |
| Helen Lucas Architects Limited | Professional & scientific | 2015 |
| Helga & Sohn Partners | | 2003 |
| Heli-One (UK) Limited | Professional & scientific | 1992 |
| Heliclub LP | | 2016 |
| Helicon Project Ltd | Education | 2025 |
| Helicon Services LP | | 2015 |
| Helicop SP | | 2001 |
| Heligan Private Equity (FP) LP | | 2024 |
| Heligan Private Equity FP (GP) LLP | | 2024 |