| Indira Restaurants Ltd | Hospitality | 2025 |
| Indra Science Ltd | Professional & scientific | 2023 |
| Indus Aroma Ltd | Hospitality | 2025 |
| Infinite Energy Services Ltd | Construction | 2026 |
| Infinitea Paisley Ltd | Hospitality | 2024 |
| Influence Property Group Ltd | Real estate | 2024 |
| Ingram Brothers Ltd | Manufacturing | 1924 |
| Injo Solutions Ltd. | Information & communication | 2007 |
| Innermetrix UK Direct Limited | Professional & scientific | 2022 |
| Innermetrix UK Limited | Professional & scientific | 2008 |
| Innes H Walker Limited | Administrative & support | 2025 |
| Innovative ASH Solutions Ltd | Water & waste | 2019 |
| Innovex Ventures Limited | Manufacturing | 2018 |
| INNSITE26 Ltd | Hospitality | 2026 |
| Inspire Fitness Ltd | Arts & recreation | 2023 |
| Instyle ALL Trades Limited | Construction | 2018 |
| Instyle Kitchen & Bathrooms Limited | Manufacturing | 2012 |
| Intellemetrics Global Limited | Manufacturing | 2010 |
| Interchem Limited | Extraterritorial | 2025 |
| Interim Management Programmes Limited | Information & communication | 1999 |
| Interior Electrics Ltd. | Manufacturing | 2004 |
| Interserve Scotland and Ireland | Other services | 2009 |
| Intregue Ltd | Manufacturing | 2024 |
| Inverclyde Property Services Ltd | Construction | 2016 |
| Invergair Property Limited | Construction | 2018 |
| Inveroran Limited | Real estate | 2014 |
| Investor District Ltd | Real estate | 2020 |
| Invitrogen Europe Limited | Professional & scientific | 1983 |
| Invitrogen Holdings Limited | Professional & scientific | 2004 |
| Ip-Comms Ltd | Financial services | 2020 |
| IQ (Scot) Ltd | Wholesale & retail | 2016 |
| Iqbal Optical Ltd | Health & social care | 2022 |
| Irepair Paisley Ltd | Other services | 2014 |
| Ironed OUT DRY Cleaners Limited | Other services | 2019 |
| ISL Syntema Limited | Professional & scientific | 2004 |
| Islay Cheese Company Ltd | Hospitality | 2015 |
| Isminol Limited | Professional & scientific | 2025 |
| Iso-Easy Ltd | Professional & scientific | 2012 |
| Issah Services Ltd | Other services | 2026 |
| Isshak & Herriot Limited | Real estate | 2022 |
| IT Analytics Ltd | Information & communication | 2024 |
| IT Help Hub Ltd | Water & waste | 2025 |
| It's Alive Ltd | Hospitality | 2024 |
| ITC Paisley Limited | Information & communication | 2016 |
| ITM Consultants Limited | Professional & scientific | 2013 |
| Ivad Limited | Wholesale & retail | 2004 |
| Ivedi Ltd | Other services | 2024 |
| Ixonit Ltd | Information & communication | 2026 |
| J & a Currie Limited | Agriculture & fishing | 2000 |
| J & a Tickell Ltd | Professional & scientific | 2024 |
| J & R Rankin Limited | Agriculture & fishing | 2021 |
| J Adams Group Ltd | Construction | 2025 |
| J and J Fabrication and Welding Limited | Manufacturing | 2025 |
| J B Coachworks Limited | Wholesale & retail | 2009 |
| J Bruce Andrew & Co Ltd | Professional & scientific | 2019 |
| J F Paint Supplies Limited | Wholesale & retail | 1984 |
| J M T Audit Ltd. | Professional & scientific | 2009 |
| J R Automation Functional Safety Consultants Ltd | Professional & scientific | 2024 |
| J R Pearson (Glasgow) Limited | Wholesale & retail | 1990 |
| J Star Logistics Ltd | Transport & logistics | 2024 |
| J Taylor Construction Services Ltd | Construction | 2025 |
| J&C Paisley Ltd | Wholesale & retail | 2026 |
| J&J Holistic Ltd | Real estate | 2025 |
| J&K Scot Enterprises Ltd | Real estate | 2025 |
| J&S RAM Ltd | Wholesale & retail | 2022 |
| J&T Fitness Training Ltd | Health & social care | 2017 |
| J. & M. Barr & Sons Limited | Agriculture & fishing | 1978 |
| J.D. Lamont Limited | Construction | 2004 |
| J.F. Martin & SON Ltd | Construction | 2013 |
| J.Fleming Engineering(Stornoway)Limited | Energy | 1976 |
| J.M.G. Properties Limited | Hospitality | 1999 |
| J1WVS Ltd | Administrative & support | 2020 |
| J4 Admin Services Ltd | Administrative & support | 2026 |
| JAB Squared Limited | Professional & scientific | 2017 |
| Jack Kyle Holdings Limited | Wholesale & retail | 2022 |
| Jacks Music Lessons Ltd | Wholesale & retail | 2025 |
| Jaco Builders & Joiners Ltd | Construction | 2024 |
| Jacol Properties Ltd | Real estate | 2025 |
| Jacork Ltd | Construction | 2015 |
| Jadaar Limited | Arts & recreation | 2003 |
| Jagsman Gaming Limited | Other services | 2023 |
| Jaklean Health Ltd | Health & social care | 2023 |
| Jaklean Ltd | Administrative & support | 2022 |
| James & Lewis Limited | Wholesale & retail | 2017 |
| James Ferguson Rigging Ltd | Construction | 2016 |
| James Kidd Electrical Ltd | Manufacturing | 2025 |
| James Mcgachy (Property) Limited | Hospitality | 2000 |
| JAY Facilities Management Ltd | Administrative & support | 2026 |
| JB Catering Paisley Limited | Hospitality | 2019 |
| JC Apparel Ltd | Manufacturing | 2025 |
| JCG Management Ltd | Real estate | 2023 |
| Jcrw Properties Ltd | Real estate | 2025 |
| JD External Building Services (Scotland) Limited | Construction | 2016 |
| JD Motor Services Limited | Wholesale & retail | 2019 |
| JED Dent Limited | Health & social care | 2017 |
| Jedek Ltd. | Information & communication | 2005 |
| Jedi HR Solutions Ltd | Other services | 2024 |
| Jedworth Limited | Real estate | 2011 |
| Jennifer Donn Pilates Ltd | Arts & recreation | 2019 |
| Jennifer Scott Dance Limited | Education | 2026 |