| Jcca Limited | Real estate | 2010 |
| JCE Consult Ltd | Information & communication | 2019 |
| JCL Maintenance Ltd | Construction | 2020 |
| JCM Taxis Ltd. | Transport & logistics | 2003 |
| Jconvery Ltd | Other services | 2024 |
| JCP Support Services Limited | Professional & scientific | 2023 |
| JCS Assets Ltd | Wholesale & retail | 2024 |
| JCS Electrical (Scotland) Ltd | Construction | 2022 |
| JD Belper Limited | Real estate | 2024 |
| JD Carty Consulting Ltd | Professional & scientific | 2025 |
| JD Developments East Ltd | Construction | 2020 |
| JD Electrical (Edinburgh) Ltd | Construction | 2020 |
| JD Fitters Ltd | Construction | 2026 |
| JD Higgins Consultancy Services Limited | Professional & scientific | 2017 |
| JD Landscapes & Fencing Ltd. | Administrative & support | 2019 |
| JD Media Production LP | | 2024 |
| JD Property (EDI) Ltd | Real estate | 2025 |
| JD Ventures Limited | Professional & scientific | 1996 |
| JDH Creative Studios LP | | 2024 |
| Jdhw Limited | Professional & scientific | 2015 |
| Jdmd Creative LP | | 2024 |
| JDR Cable Systems (Holdings) Limited | Professional & scientific | 1998 |
| JDR Cable Systems Limited | Professional & scientific | 1998 |
| JDR Estimating Ltd | Professional & scientific | 2023 |
| JDS 1 Limited | Professional & scientific | 2004 |
| JE Network Ltd | Information & communication | 2020 |
| Jean DOW Herbalist Ltd | Health & social care | 2018 |
| Jean Hamilton Properties Limited | Real estate | 2024 |
| Jean-Pierre Jeannon Ltd. | Health & social care | 2006 |
| Jeanie Deans Edinburgh Limited | Hospitality | 2018 |
| Jeanne Henry Wake UP LP | | 2024 |
| Jeantex Global Ltd | Wholesale & retail | 2014 |
| Jebbs Mobile Mechanic Ltd | Wholesale & retail | 2017 |
| JED Games LP | | 2014 |
| Jedco Ltd | Hospitality | 2018 |
| Jedjo Ltd | Administrative & support | 2024 |
| JEE Construction Ltd | Construction | 2025 |
| Jefcoate Anderson Architects Ltd | Professional & scientific | 2005 |
| Jefferies James UK Limited | Real estate | 2021 |
| Jefferson Development LP | | 2014 |
| Jefferson Held LP | | 2014 |
| Jeffery Associates Independent Financial Advisers | | 2004 |
| Jeffrey Crawford Limited | Professional & scientific | 2015 |
| Jeffrey GAS & Heating Services Ltd | Professional & scientific | 2021 |
| Jeffreys Interiors Holdings Ltd | Administrative & support | 2018 |
| Jeffreys Interiors Trading Ltd | Administrative & support | 2014 |
| Jeflows Services Limited | Administrative & support | 2010 |
| Jegery Ltd. | Other services | 2018 |
| JEH Investment Management Ltd | Extraterritorial | 2011 |
| Jeijing Limited | Wholesale & retail | 2025 |
| JEL Estates Ltd | Real estate | 2025 |
| Jeli SP | | 2004 |
| Jello Food Edinburgh Ltd | Hospitality | 2024 |
| Jelly Bear Consultancy Limited | Information & communication | 2021 |
| Jelly Bear Rentals Limited | Real estate | 2024 |
| Jelly Corporation LP | | 2016 |
| Jellybean Partners Limited | Administrative & support | 2013 |
| Jellyhound Ltd | Information & communication | 2012 |
| Jeltan Trading LP | | 2015 |
| JEM Consult Limited | Professional & scientific | 2012 |
| JEM Developments Scotland Limited | Construction | 2026 |
| Jemar Group Ltd | Real estate | 2025 |
| Jemkat Ltd | Extraterritorial | 2012 |
| Jemp IT Consultancy Limited | Information & communication | 2016 |
| Jena SLP | | 2008 |
| Jenburn Limited | Information & communication | 1987 |
| Jenelamines Ltd | Health & social care | 2025 |
| JENHOME51 Ltd | Professional & scientific | 2025 |
| Jenkins & Co. (Falkirk) Ltd. | Professional & scientific | 2003 |
| Jenna Marie Ltd | Other services | 2020 |
| Jennavive Ltd | Manufacturing | 2026 |
| Jenncare Group Limited | Wholesale & retail | 2026 |
| Jennie and Co Pet Care Limited | Agriculture & fishing | 2026 |
| Jennie Holdings Limited | Wholesale & retail | 2021 |
| Jennifer Cramond Ltd | Administrative & support | 2024 |
| Jennifer Cross Consulting Limited | Health & social care | 2011 |
| Jennifer Pace Ltd | Administrative & support | 2017 |
| Jennscot Limited | Wholesale & retail | 2022 |
| Jenny Brown Associates Limited | Information & communication | 2002 |
| Jenny Cabs Ltd. | Professional & scientific | 2002 |
| Jenny Karlsson Ltd | Professional & scientific | 2026 |
| Jeong&Kim Company Ltd | Professional & scientific | 2025 |
| Jepuson UK Ltd | Wholesale & retail | 2012 |
| Jequitiba LP | | 2010 |
| JER Europe Fund III SLP (Scots) GP Limited | Administrative & support | 2005 |
| JER Europe Fund III SLP (Scots), L.P. | | 2006 |
| Jera Solutions LP | | 2018 |
| Jerax LP | | 2016 |
| Jesh SP | | 2004 |
| Jesmond Homes (Scotland) LLP | | 2023 |
| Jess Electrical Services Limited | Construction | 2023 |
| Jessica Buckley Interiors Ltd | Professional & scientific | 2018 |
| Jessica Hayes Ltd | Health & social care | 2022 |
| Jessica Pedersen Aesthetic Clinic Ltd | Other services | 2026 |
| Jessine LP | | 2004 |
| Jesson L.P. | | 2015 |
| Jesystems Ltd | Information & communication | 2023 |
| JET a UK LP | | 2015 |
| JET Business Trade LP | | 2015 |
| JET Express Services LP | | 2015 |