| Jeshope Limited | Wholesale & retail | 2008 |
| Jesmond Beauty Clinic Limited | Other services | 2002 |
| Jesmond Community Leisure | Arts & recreation | 1991 |
| Jesmond Court Limited | Hospitality | 2005 |
| Jesmond Dene House Limited | Hospitality | 2004 |
| Jesmond Dene Real Tennis Club | Arts & recreation | 2014 |
| Jesmond Holdings Limited | Hospitality | 2006 |
| Jesmond Homes Limited | Real estate | 2022 |
| Jesmond Hospitality Group Limited | Professional & scientific | 2018 |
| Jesmond Kitchen Studio Ltd | Wholesale & retail | 2008 |
| Jesmond Leisure Limited | Hospitality | 2004 |
| Jesmond Local Ltd | Information & communication | 2011 |
| Jesmond Mini Market Ltd | Wholesale & retail | 2020 |
| Jesmond Motors Ltd | Wholesale & retail | 2023 |
| Jesmond Park West Management Company Limited | Households | 1964 |
| Jesmond Paving and Landscaping Ltd | Administrative & support | 2025 |
| Jesmond Property Developments Limited | Real estate | 1986 |
| Jesmond Student Houses (Property Management) Limited | Real estate | 2022 |
| Jesmond Vale Builders Limited | | 1977 |
| Jesmond Wine Company Limited | Wholesale & retail | 2015 |
| JESMONDNAILS88 Ltd | Other services | 2024 |
| Jesmondpropertyshop Ltd | Real estate | 2017 |
| Jess NE Ltd | Administrative & support | 2022 |
| Jesse Owen Sportswear and Accessories Ltd | Manufacturing | 2025 |
| Jessella Limited | Construction | 2005 |
| JET AI Ltd | Manufacturing | 2021 |
| JET Jobs Education and Training | Education | 2006 |
| JET N' Drain (NE) Limited | Administrative & support | 2025 |
| Jetbio Ltd | Professional & scientific | 2023 |
| Jetsun Holdings Limited | Financial services | 2023 |
| Jeucho Limited | Information & communication | 2016 |
| JEV Holdings Ltd | Financial services | 2022 |
| Jeva Consulting Ltd | Professional & scientific | 2014 |
| Jewana’S Kitchen and Desserts Ltd | Hospitality | 2025 |
| Jewel Developments (NE) Ltd | Real estate | 2018 |
| Jewel Investments Limited | Financial services | 2020 |
| Jewelry & Watches Ltd | Wholesale & retail | 2024 |
| Jewels Empiro Ltd | Wholesale & retail | 2023 |
| Jewelspring Limited | Construction | 1983 |
| JF Renewables Ltd | Professional & scientific | 2022 |
| Jfdi Lettings Limited | Real estate | 2025 |
| Jfrench.Jullsiteservices Limited | Construction | 2018 |
| Jgck Holdings Limited | Real estate | 2026 |
| JGF Electrical Services Ltd | Construction | 2015 |
| JGG Civil Engineer Limited | Administrative & support | 2015 |
| JGH Commercial & Industrial Cleaning Limited | Administrative & support | 2022 |
| JGM Composites Ltd | Construction | 2024 |
| JGN Consultants Limited | Professional & scientific | 2012 |
| JGS Events Ltd | Hospitality | 2025 |
| JGW Consulting Ltd | Financial services | 2019 |
| JHAH1 Limited | Financial services | 2017 |
| Jhar Limited | Wholesale & retail | 2026 |
| Jhjs Property Holdings Ltd | Real estate | 2025 |
| JHM Properties (North East) Limited | Real estate | 2025 |
| JHM Residential Limited | Real estate | 2024 |
| JHT Fabrications Ltd | Manufacturing | 2003 |
| JHT Group Holdings Limited | Financial services | 2019 |
| Jhutchyenergyservices Ltd | Other services | 2016 |
| Jiahua Europe Limited | Professional & scientific | 2016 |
| Jibr Technologies Ltd | Information & communication | 2019 |
| Jicrit Limited | Professional & scientific | 1997 |
| JIE Restaurant Ltd | Hospitality | 2025 |
| Jigsaw Care Limited | Education | 2003 |
| JIM Coltman Limited | Wholesale & retail | 2003 |
| JIM Hastings Limited | Construction | 1973 |
| Jimbo MAC Limited | Information & communication | 2025 |
| Jime Transport Ltd | Transport & logistics | 2020 |
| Jimmy Bates Piping Services Limited | Construction | 2009 |
| JIN Cleaning Corporation Ltd | Administrative & support | 2021 |
| JIN Corporation Holdings Ltd | Administrative & support | 2022 |
| JIN Corporation Ltd | Information & communication | 2021 |
| Jinnfx Ltd | Financial services | 2025 |
| Jiuhou Ltd | Hospitality | 2023 |
| Jiwa Pharm Ltd | Health & social care | 2015 |
| JJ Lettings NE Ltd | Real estate | 2026 |
| JJ Matrix Ltd | Information & communication | 2026 |
| JJ Nextstep Consultancy Ltd | Professional & scientific | 2026 |
| JJ Pilates Ltd | Arts & recreation | 2019 |
| JJ Sports Community C.I.C. | Education | 2026 |
| JJ Welsh IFA Ltd | Financial services | 2021 |
| Jj&H Properties Ltd | Real estate | 2025 |
| JJC Property Investment Ltd | Real estate | 2019 |
| Jjch Ltd | Financial services | 2025 |
| Jjhw Ltd | Construction | 2016 |
| JJM Entertainment Ltd | Arts & recreation | 2023 |
| Jjnv Limited | Administrative & support | 2001 |
| Jjsz Limited | Administrative & support | 2026 |
| Jjtoysne Limited | Wholesale & retail | 2022 |
| JK Bling Boutique Ltd | Wholesale & retail | 2023 |
| JK Contracts & Building Services Limited | Construction | 2019 |
| JK Industrial Services Limited | Administrative & support | 2022 |
| JK Lifting Equipment Ltd | Construction | 2017 |
| JK NE Ltd | Wholesale & retail | 2026 |
| JK7 Ltd Ltd | Hospitality | 2025 |
| Jkaf Property Ltd | Real estate | 2020 |
| JKD Retail Limited | Wholesale & retail | 2016 |
| Jklm Property Ltd | Real estate | 2025 |
| Jklmdigital Ltd | Professional & scientific | 2018 |
| JKM Property Services Ltd | Real estate | 2025 |
| JKN Leisure Ltd | Real estate | 2018 |