| Integrity Engineering (Scotland) Limited | Manufacturing | 2016 |
| Integrity-Tk Ltd | Education | 2022 |
| Intelligent Electricity Limited | Professional & scientific | 2013 |
| Intelligent Land Investments (Battery Storage) Limited | Real estate | 2017 |
| Intelligent Land Investments Group PLC | Construction | 2017 |
| Intelligent Land Investments Limited | Other services | 2004 |
| Intelligent Land Options Ltd. | Construction | 2009 |
| Interaxic Consultants Ltd | Professional & scientific | 2022 |
| International Automotive Aftersales Solutions Ltd | Professional & scientific | 2023 |
| Intralia Limited | Information & communication | 1997 |
| Inventory Run Rate Ltd | Information & communication | 2025 |
| Invest SNS Ltd | Financial services | 2024 |
| Investment Properties (Scotland) Ltd | Real estate | 2023 |
| Investments Bermuda Limited | | 2023 |
| Invincible Logistics Limited | Transport & logistics | 2018 |
| IOA Mots Ltd | Wholesale & retail | 2025 |
| Iona Travel Solutions Ltd | Other services | 2025 |
| IPC Systems Ltd | Information & communication | 2023 |
| IPF Solutions Limited | Professional & scientific | 2024 |
| Ipms Ltd. | Professional & scientific | 2007 |
| Ireland Alloys Limited | Wholesale & retail | 1964 |
| Irfhan Investments Ltd | Real estate | 2022 |
| Ironchat AI Ltd | Professional & scientific | 2026 |
| Irving's Peak Performance Gym Limited | Arts & recreation | 2023 |
| Isaac Craig Photography Ltd | Arts & recreation | 2018 |
| Ishman Properties Limited | Real estate | 2020 |
| Isocon (Engineering) Limited | Manufacturing | 1972 |
| Isocon Energy Ltd | Professional & scientific | 2013 |
| Isocon Holdings Limited | Professional & scientific | 2010 |
| Isocon Property Holdings Limited | Real estate | 2016 |
| Ivanna’S Catering Ltd | Hospitality | 2021 |
| J & J Garments Ltd | Manufacturing | 2021 |
| J & M Contracts Limited | Professional & scientific | 2001 |
| J & S Duncan Ltd | Wholesale & retail | 2025 |
| J C Blacksmith Services Ltd | Manufacturing | 2022 |
| J Callaghan Electrical Ltd | Construction | 2021 |
| J Fleming Consultancy Limited | Extraterritorial | 2014 |
| J Hope Roofing and Construction Ltd | Construction | 2021 |
| J Kyle Cleaning Services Ltd | Administrative & support | 2013 |
| J M L Wards Limited | Professional & scientific | 2010 |
| J Mccoll Comms Ltd | Information & communication | 2026 |
| J Mcdade Plant Repairs Ltd. | Wholesale & retail | 2009 |
| J Mclean Roofing Limited | Construction | 2012 |
| J P Consulting (Scotland) Limited | Extraterritorial | 2010 |
| J R & Cross Property Ltd | Real estate | 2020 |
| J S Mackie Holding Limited | Financial services | 2025 |
| J Thomson-Scott Limited | Wholesale & retail | 2017 |
| J&A Automotive Ltd | Wholesale & retail | 2020 |
| J&L Laundrettes Limited | Other services | 2026 |
| J'Aesthetica Ltd | Other services | 2024 |
| J. & C. Stuart Pharmacies Limited | Wholesale & retail | 2002 |
| J. Noble Services Limited | Wholesale & retail | 1984 |
| J. Watson Scott & Co Ltd | Professional & scientific | 2016 |
| J.A Electrical and Civil Services Limited | Construction | 2015 |
| J.D.S. Window Blinds Ltd | Manufacturing | 2013 |
| J1 Digital Ltd | Information & communication | 2022 |
| J12 Rail Services Ltd | Construction | 2019 |
| Jabulani Lucas Ltd | Health & social care | 2017 |
| Jack Bryson Homes Ltd | Construction | 2018 |
| Jackton Art Ltd | Wholesale & retail | 2023 |
| JAD Publishing Limited | Information & communication | 2021 |
| JAK Scotland Ltd | Real estate | 2025 |
| James a Ritchie Services Ltd | Transport & logistics | 2024 |
| James Baird Contractors Limited | Wholesale & retail | 2021 |
| James Bell & Sons Limited | Manufacturing | 1980 |
| James Cowie Group Limited | Manufacturing | 2011 |
| James Grant Upholstery Ltd | Manufacturing | 2019 |
| James Redford Ltd | Real estate | 2016 |
| Jamie Mclaughlin Data Services Ltd | Information & communication | 2022 |
| Jamir Services Limited | Professional & scientific | 2023 |
| Jamms Couriers Ltd | Transport & logistics | 2025 |
| JAN Allan Jewellers Ltd | Manufacturing | 2016 |
| Jangiz Limited | Other services | 2024 |
| Janine by Design Ltd | Professional & scientific | 2016 |
| Jasm Property Ltd | Real estate | 2021 |
| Jasmine Estates Ltd | Real estate | 2017 |
| Jasmine Thai Massage Glasgow Limited | Other services | 2016 |
| Jason (Glasgow) Ltd | Administrative & support | 2021 |
| Jaybee Digital Ltd | Information & communication | 2021 |
| Jaydev Limited | Health & social care | 2019 |
| JB Tech Consultancy Limited | Construction | 2017 |
| JBH Transport Limited | Transport & logistics | 2009 |
| JBM Corporate Limited | Professional & scientific | 2024 |
| JC Box Leicester Ltd | Real estate | 2016 |
| JC Squared Ltd | Real estate | 2024 |
| JC Windows & Doors Ltd | Construction | 2022 |
| Jcca Pubs Limited | Hospitality | 2023 |
| JCJ Barbers (AYR) Ltd | Other services | 2010 |
| JCJ Barbers (Girvan) Ltd. | Other services | 2008 |
| JD Energy Ltd | Construction | 2025 |
| JD Engineering Design Ltd | Professional & scientific | 2024 |
| JD Infrastructure Services Ltd | Construction | 2025 |
| JD Roof Master Limited | Construction | 2025 |
| JD Vending Solutions Ltd | Hospitality | 2026 |
| JDL Window Cleaning Services Limited | Administrative & support | 2017 |
| JDR Fencing Limited | Construction | 1993 |
| JE Vogue Ltd | Wholesale & retail | 2025 |
| JEC Services Ltd | Construction | 2022 |
| Jeejay Properties Ltd | Real estate | 2021 |
| Jema (Scotland) Limited | Real estate | 2024 |