| Hungarian Magic Flavours Ltd | Manufacturing | 2012 |
| Hunter Adams Limited | Administrative & support | 2011 |
| Hunting Energy Services Limited | Manufacturing | 1985 |
| Huntly Distillers Limited | Administrative & support | 2007 |
| Huntly Lane Properties (Aboyne) Limited | Real estate | 2004 |
| Huntly Properties Ltd. | Administrative & support | 2001 |
| Huntly Vehicle Care Centre Limited | Wholesale & retail | 2002 |
| Hush Private Gym Ltd | Arts & recreation | 2017 |
| Hutcheon Investments Limited | Administrative & support | 2021 |
| Hutcheon Mearns Ltd | Professional & scientific | 2013 |
| Hutcheon Services Limited | Construction | 1980 |
| Hutcheon Subsea Inspection Ltd | Professional & scientific | 2025 |
| Hutcheon Trustees Limited | Extraterritorial | 2007 |
| Huzur Aberdeen Limited | Other services | 2021 |
| Hvac & Refrigeration Engineering Limited | Mining & quarrying | 1999 |
| Hvac-Refrigeration-Renewables Limited | Manufacturing | 2025 |
| HVO Property Investments Limited | Other services | 2014 |
| HWT Developments Limited | Construction | 2019 |
| HY GLA Pharma Ltd | Financial services | 2022 |
| Hychor Ltd | Professional & scientific | 2024 |
| Hydarie OIL & GAS Ltd | Mining & quarrying | 2024 |
| Hydra Hive Ltd | Information & communication | 2025 |
| Hydra Technical Consultants Ltd | Professional & scientific | 2017 |
| Hydralock Systems Limited | Other services | 2012 |
| Hydramech Aberdeen Ltd | Wholesale & retail | 2018 |
| Hydrasun Limited | Manufacturing | 1976 |
| Hydrawell UK Limited | Mining & quarrying | 2016 |
| Hydro Group Limited | Manufacturing | 1991 |
| Hydro-Cable Systems Limited | Manufacturing | 1985 |
| Hydrobond Engineering Limited | Manufacturing | 1982 |
| Hydrogen Systems Engineering Limited | Professional & scientific | 2025 |
| Hydrographic Personnel Resources (UK) Limited | Administrative & support | 2021 |
| Hydrojet (Aberdeen) Limited | Administrative & support | 2020 |
| Hydromea Services Limited | Manufacturing | 2019 |
| Hydropulsion Limited | Wholesale & retail | 2006 |
| Hydrotech Access & Inspection Ltd | Professional & scientific | 2026 |
| Hydrovolve Holdings Limited | Other services | 2020 |
| Hydrovolve Limited | Administrative & support | 2018 |
| Hyps Business Consulting Ltd | Information & communication | 2013 |
| Hyreach Offshore Ltd | Mining & quarrying | 2026 |
| Hythe Developments Limited | Construction | 2015 |
| Hyway Limited | Financial services | 2022 |
| I & a W Ltd | Professional & scientific | 2024 |
| I & K Motors Ltd. | Wholesale & retail | 2003 |
| I & M Smith Properties Limited | Extraterritorial | 2014 |
| I and J Garage Ltd | Wholesale & retail | 2016 |
| I Datarush Limited | Transport & logistics | 2014 |
| I Homes Aberdeen Ltd | Construction | 2021 |
| I J Pratt Services Limited | Public administration | 2011 |
| I Love Icecream Aberdeen Ltd | Hospitality | 2022 |
| I NOW Declare Ltd | Other services | 2025 |
| I Portland ABD Ltd | Hospitality | 2025 |
| I R M Electrical Limited | Construction | 2025 |
| I&N Services Ltd | Administrative & support | 2023 |
| I&P Ventures Limited | Wholesale & retail | 2016 |
| I-Flow Energy Holdings Limited | Administrative & support | 2013 |
| I-Learner's Hub Ltd | Education | 2023 |
| I-Vigilant Technologies Limited | Mining & quarrying | 2012 |
| I. Cameron Communications Ltd. | Professional & scientific | 1992 |
| I.M.F. Technical Services Limited | Professional & scientific | 1988 |
| I.R. Limited | Agriculture & fishing | 2003 |
| I.S.Property Management Services Ltd | Households | 2021 |
| I.S.S. (Aberdeen) Limited | Manufacturing | 2004 |
| I1 Investments Limited Liability Partnership | | 2008 |
| I70 Orwell Limited | Administrative & support | 2025 |
| I70 Partners Limited | Administrative & support | 2020 |
| I7V Renewables Limited | Other services | 2020 |
| Iacs Consulting Ltd | Information & communication | 2019 |
| Iain Glennie Framing Ltd | Professional & scientific | 2026 |
| Iain Smith Trustees Limited | Extraterritorial | 2011 |
| Iamus Limited | Professional & scientific | 2012 |
| IAN COX Limited | Professional & scientific | 1989 |
| IAN Mcgregor Architects Ltd | Professional & scientific | 2015 |
| IAN Mitchell Engineering Design Limited | Professional & scientific | 1984 |
| IAN Robb Timber Harvesting Limited | Administrative & support | 2003 |
| IAS International UK Ltd | Professional & scientific | 2026 |
| IB Services (North East) Limited | Construction | 2016 |
| Ibnhashimconsultancy Ltd | Professional & scientific | 2024 |
| Ibra Handyman Ltd | Construction | 2024 |
| Ibraxis Limited | Professional & scientific | 2025 |
| IC Training Ltd | Professional & scientific | 2019 |
| Ic&I Industries Ltd | Professional & scientific | 2015 |
| ICA (Assets) Limited | Real estate | 1989 |
| Icadd Limited | Other services | 2019 |
| Ice Sports Caledonia Ltd | Wholesale & retail | 2020 |
| Ices N Spices Ltd | Hospitality | 2024 |
| Ichthys Consulting Limited | Professional & scientific | 2016 |
| Icon Protection Emea Limited | Wholesale & retail | 2013 |
| Icon Scotland Ltd | Real estate | 2022 |
| Icot Transport Ltd | Transport & logistics | 2024 |
| ICR Scotland Limited | Administrative & support | 2003 |
| ICS Inspection Services Limited | Professional & scientific | 2008 |
| ICS Project Solutions Ltd | Professional & scientific | 2025 |
| Icsquared Limited | Mining & quarrying | 2017 |
| ID Design Solutions Ltd | Professional & scientific | 2011 |
| Ideal Medicare Limited | Public administration | 2024 |
| Ideas in Partnership Limited | Administrative & support | 2001 |
| IDEASINT3 Ltd | Professional & scientific | 2025 |
| Idelta Limited | Information & communication | 2001 |
| IDI Services Ltd | Transport & logistics | 2019 |