| International Organisation for the Philosophy of Death Limited | Administrative & support | 2025 |
| International Petro-Engineering & Associates | | 2001 |
| International Primary Care Respiratory Group | Health & social care | 2003 |
| International Record of Arbitrators L.P. | | 2010 |
| International Rope Access Services Ltd | Construction | 2018 |
| International Sandwich Company Limited | Hospitality | 2024 |
| International Society of Global Health | Information & communication | 2019 |
| International Software Investments LP | | 2016 |
| International Sports Academy (Scotland) Limited | Arts & recreation | 2015 |
| International Steel LP | | 2016 |
| International Synergy LP | | 2015 |
| International Taekwon-Do Federation - (Scotland) Limited | Arts & recreation | 2010 |
| International Technology L.P. | | 2008 |
| International Trade Group LP | | 2017 |
| International Trading and Construction LP | | 2017 |
| International Water Solutions Ltd | Manufacturing | 2015 |
| International Westis Trade LP | | 2017 |
| Internationalenergyconsorcium LP | | 2016 |
| Internet Commercial Services L.P. | | 2011 |
| Internet Global Developments L.P. | | 2012 |
| Internet Global Services L.P. | | 2011 |
| Internet Global Technology L.P. | | 2011 |
| Internet Industries L.P. | | 2010 |
| Internet Networks L.P. | | 2010 |
| Internet Organisation L.P. | | 2010 |
| Internet Space Hosting L.P. | | 2015 |
| Internet Traffic Supply LP | | 2017 |
| Internet Worldwide Solutions L.P. | | 2011 |
| Intero Held LP | | 2016 |
| Intero Solutions LP | | 2015 |
| Interplan Management Company L.P. | | 2009 |
| Interplus Corporation L.P. | | 2012 |
| Interpolite Communications LP | | 2014 |
| Interscale L.P. | | 2014 |
| Interserv Management L.P. | | 2011 |
| Interserv Solutions L.P. | | 2009 |
| Interserve Systems L.P. | | 2009 |
| Interslice Tech Limited | Information & communication | 2022 |
| Intersphere Educational Services Limited | Education | 2017 |
| Interstudies Invest Ltd | Real estate | 2003 |
| Intertrade Associates L.P. | | 2011 |
| Intertrade Europe L.P. | | 2009 |
| Intertrade Global Solutions LP | | 2011 |
| Intertrade Impex LP | | 2012 |
| Intertrade Solutions L.P. | | 2009 |
| Intertrans Overseas L.P. | | 2013 |
| Intertransport L.P. | | 2016 |
| Intertrascon Holding LP | | 2019 |
| Intervale Trade L.P. | | 2010 |
| Interview Professional Ltd | Information & communication | 2020 |
| Interwald LP | | 2012 |
| Interweg LP | | 2012 |
| Interwynd Limited | Construction | 1997 |
| Intest Alliance LP | | 2014 |
| Intest Marketing LP | | 2014 |
| Inteum International Ltd | Information & communication | 2009 |
| Inteuro & Associates | | 1993 |
| Intex NET LP | | 2015 |
| Inthallo Ltd | Information & communication | 2016 |
| Intimate Solutions Limited | Wholesale & retail | 2026 |
| Into Glasgow LP | | 2008 |
| Into Work | Administrative & support | 1997 |
| Intouch Chirocare Limited | Administrative & support | 2005 |
| Intra Drive Ltd | Manufacturing | 2016 |
| Intra IT LP | | 2015 |
| Intrabridge L.P. | | 2010 |
| Intracorp Sales LP | | 2016 |
| Intrade Commerce LP | | 2013 |
| Intragen Advisors Ltd | Professional & scientific | 2026 |
| Intrallect Limited | Information & communication | 2000 |
| Intrans Corporation L.P. | | 2012 |
| Intrans Global L.P. | | 2009 |
| Intrans Services LP | | 2011 |
| Intratex Sales L.P. | | 2012 |
| Intratrading Limited | Information & communication | 2026 |
| Intrepid Capital Limited | Extraterritorial | 2011 |
| Intrepid Design Co. Ltd | Information & communication | 2022 |
| Intrepid Hare Development Collective (Ihdc) Ltd | Information & communication | 2022 |
| Intro Pro Software Services LP | | 2014 |
| Intro Resources LP | | 2015 |
| Introlab Systems LP | | 2018 |
| Intu Braehead Merchants Association Limited | Administrative & support | 2000 |
| Intuitive Financial Planning Limited | Financial services | 2015 |
| Intune Health Ltd | Wholesale & retail | 2020 |
| Invade Digital Media & Marketing Ltd | Information & communication | 2019 |
| Invara Digital Ltd | Information & communication | 2026 |
| Inveg Group Ltd | Wholesale & retail | 2022 |
| Invenergy Development UK Ltd | Energy | 2022 |
| Invenergy Services UK Limited | Administrative & support | 2015 |
| Invenita Ltd. | Professional & scientific | 2018 |
| Invenk Solutions Ltd | Professional & scientific | 2022 |
| Invented by Limited | Information & communication | 2004 |
| Inventive Class LP | | 2016 |
| Inventor Capital LP | | 2013 |
| Inver Brass & Co., | | 1990 |
| Inverburgh Limited | Real estate | 2023 |
| Invercap Holdings Limited | Financial services | 2012 |
| Inverclay Investments Limited | Real estate | 2016 |
| Invercloy Investments Limited | Real estate | 2013 |
| Inverdunning (Hatton Mains) Limited | Real estate | 2017 |