| ITS ALL Food Group Limited | Administrative & support | 2003 |
| IVY CON Ltd | Other services | 2025 |
| J & a Smith Ltd | Wholesale & retail | 2023 |
| J & H Ritchie Ltd. | Agriculture & fishing | 1998 |
| J F Hillebrand (G.C) Limited | Transport & logistics | 1994 |
| J Smeaton Plumbing Ltd | Construction | 2023 |
| J Wild Properties Ltd | Real estate | 2022 |
| J. Mackie (Glasgow) Limited | Wholesale & retail | 2000 |
| J.K Wall Done Limited | Construction | 2025 |
| J.R. Scott (Plastic Surgery) Limited | Health & social care | 2001 |
| J.W. Filshill International Limited | Wholesale & retail | 2014 |
| J.W. Filshill Limited | Wholesale & retail | 1936 |
| Jacb Ltd | Professional & scientific | 2021 |
| Jado Holdings Limited | Administrative & support | 2022 |
| James Howden & Company Limited | Manufacturing | 1915 |
| James Howden & Godfrey Overseas Limited | Professional & scientific | 1968 |
| James Mackie (Glasgow) Limited | Wholesale & retail | 2000 |
| James Riley Contracts Limited | Construction | 2016 |
| James Sellars Joinery Ltd | Construction | 2006 |
| James Tierney (Scotland ) Limited | Construction | 2022 |
| Jameston Ventures LLP | | 2024 |
| Japang Ltd | Hospitality | 2020 |
| JAX Autos Limited | Wholesale & retail | 2025 |
| JAY DEE Steel Limited | Manufacturing | 2022 |
| JB Electrical & Mechanical Services Ltd | Energy | 2010 |
| JB Properties (Renfrew) Limited | Real estate | 2026 |
| JBM Pubs Ltd | Hospitality | 2024 |
| JBS Scotland Ltd | Households | 2024 |
| Jdps Plumbers Limited | Construction | 2012 |
| Jefferson Family Investment Company Limited | Real estate | 2021 |
| JH Group 1 Limited | Wholesale & retail | 2025 |
| JHC Interiors Ltd. | Construction | 1985 |
| JHD Safety Services Ltd. | Professional & scientific | 2008 |
| JHW Construction Limited | Construction | 2023 |
| JHW Facilities Management Limited | Construction | 2025 |
| JIM Cooper Maintenance Limited | Manufacturing | 2015 |
| Jinyan Events Limited | Professional & scientific | 2021 |
| Jinyan Trading Limited | Wholesale & retail | 2020 |
| JK Dhaliwal Property Limited | Real estate | 2025 |
| Jllld Limited | Arts & recreation | 2019 |
| John Brown Caterhire Limited | Hospitality | 1919 |
| John R Adam & Sons (Holdings) Limited | Professional & scientific | 2004 |
| JPM Aesthetics Ltd | Health & social care | 2020 |
| JPM Investments Limited | Professional & scientific | 2011 |
| JR Financial Services Ltd | Professional & scientific | 2023 |
| JR Glasgow Limited | Wholesale & retail | 2011 |
| JT31 Limited | Professional & scientific | 2021 |
| JTB Consultancy Limited | Information & communication | 2021 |
| Jtmt Properties Limited | Real estate | 2022 |
| Juddyval Ltd | Real estate | 2026 |
| Judy Mcfaite Hairdressing Limited | Other services | 2016 |
| Juicy Chick Ltd | Hospitality | 2025 |
| JVK Residential Ltd | Construction | 2021 |
| K & K Stone Masonry Specialists Ltd | Construction | 2016 |
| K2 Innovate Limited | Information & communication | 2024 |
| K2(RESTAURANTS)LIMITED | Real estate | 1976 |
| K9 Klips LP | | 2020 |
| K9 Turkish Barber Ltd | Other services | 2021 |
| Kaiser Recovery Ltd | Transport & logistics | 2024 |
| Kane Engineering Services Limited | Professional & scientific | 2007 |
| Kanna Tech Ltd | Information & communication | 2026 |
| Katsar Inspection Services Limited | Professional & scientific | 2014 |
| KAYLEIGHMILLER37 Limited | Manufacturing | 2019 |
| KB (Shetland) Limited | Hospitality | 2020 |
| KCD Consultants Limited | Administrative & support | 2022 |
| KCD Property Holdings Ltd | Real estate | 2023 |
| KCR Consultants Ltd | Professional & scientific | 2025 |
| Kelvinbridge Limited | Hospitality | 1999 |
| Kemcolecovenantvision.Uk Limited | Real estate | 2025 |
| Kenneth Brown (Motor Engineering) Limited | Wholesale & retail | 1986 |
| Kept Properties Ltd | Real estate | 2022 |
| Keystore Broadloan Limited | Wholesale & retail | 2020 |
| Kilmardinny 76 Limited | Financial services | 2023 |
| Kirkcaldy Properties Limited | Households | 2019 |
| Kirklee Property Company (2) Limited | Real estate | 2006 |
| Kitchen Trends Limited | Wholesale & retail | 2009 |
| Koopman International UK Limited | Wholesale & retail | 2010 |
| KPV Commercial Ltd | Professional & scientific | 2007 |
| KS Wholesale Limited | Wholesale & retail | 2018 |
| KSM Superclean Limited | Administrative & support | 2018 |
| KW Installation Ltd | Financial services | 2024 |
| Kyle Consultancy Limited | Professional & scientific | 2009 |
| L T M Property Maintenance Limited | Water & waste | 2025 |
| L&T Permanent Cosmetics Limited | Other services | 2017 |
| L4 Tints Ltd | Wholesale & retail | 2022 |
| LA Nation Limited | Wholesale & retail | 2020 |
| LA Reine Books Ltd | Professional & scientific | 2025 |
| LAD Electrics Renfrew Ltd | Construction | 2025 |
| Lambert & SON Properties Ltd. | Real estate | 2006 |
| Lambert Contracts Limited | Construction | 1985 |
| Larkhall Industrial Investments Ltd | Real estate | 2024 |
| Lasnor Limited | Administrative & support | 1977 |
| Lastlawn Projects Ltd | Administrative & support | 2020 |
| Lawn One Ltd | Real estate | 2016 |
| LB Smith Limited | Real estate | 2022 |
| Lease 122 Limited | Administrative & support | 2014 |
| Lecropt Ltd. | Education | 2003 |
| LEE Family Ltd | Hospitality | 2022 |
| Leeburn Limited | Real estate | 2017 |
| Legacy Live Management Ltd | Information & communication | 2023 |