| Interiors by Abode EOT Limited | Administrative & support | 2026 |
| Interiors by Abode Limited | Professional & scientific | 2015 |
| International Academy of Business Analytics Ltd | Information & communication | 2012 |
| International Forwarding Limited | Transport & logistics | 1987 |
| International Forwarding Logistics Limited | Transport & logistics | 2015 |
| Inupiat Industry and Commerce Co., Ltd | Extraterritorial | 2013 |
| Irebuild Investments Ltd | Financial services | 2025 |
| Irebuild Operations Ltd | Financial services | 2025 |
| Isale Limited | Professional & scientific | 2006 |
| Israel Beisite International Group Co., Limited | Extraterritorial | 2018 |
| IT Process Optimisation Limited | Information & communication | 2016 |
| Itto Ltd | Extraterritorial | 2025 |
| Itym Limited | Administrative & support | 1996 |
| Itypical Limited | Professional & scientific | 2021 |
| It’S NOT Just a Period Ltd | Health & social care | 2024 |
| Iventiv Limited | Education | 2008 |
| Ivyline (Holdings) Ltd | Financial services | 2019 |
| Ivyline Ltd | Wholesale & retail | 2019 |
| Ixon Cloud Ltd | Information & communication | 2026 |
| J & R Gibson Ltd | Wholesale & retail | 2018 |
| J and S Combat Fitness Ltd | Arts & recreation | 2022 |
| J Rogers Enterprises Ltd | Wholesale & retail | 2026 |
| J&E Holiday Rentals Limited | Hospitality | 2016 |
| J&R (UK) AMC Ltd | Administrative & support | 2020 |
| J&T Group International Co., Ltd | Extraterritorial | 2019 |
| Jackson Freight System (China) Ltd | Extraterritorial | 2024 |
| Jacqui Clements Consulting Limited | Professional & scientific | 2019 |
| JAM Creative Marketing Limited | Administrative & support | 2012 |
| James Arbuckle Photography Limited | Professional & scientific | 2016 |
| James Bell Gardens and Trees Ltd | Administrative & support | 2025 |
| James Mobbs Design Limited | Professional & scientific | 2019 |
| James Moore Jewellers Limited | Wholesale & retail | 2007 |
| Jamit Holdings Group Co., Ltd | Administrative & support | 2023 |
| Jarcus Management Ltd | Real estate | 2011 |
| JAY Ganesh Trading PVT., Ltd | Administrative & support | 2021 |
| JBM Social Work Consulting Ltd | Health & social care | 2020 |
| JBO Projects Ltd | Professional & scientific | 2006 |
| JBW Health Ltd | Health & social care | 2021 |
| Jc-Chem Industry Co., Ltd. | Manufacturing | 2020 |
| JCW Scientific Ltd | Mining & quarrying | 2023 |
| JEN Roberts Town Planning Ltd | Professional & scientific | 2025 |
| Jennifer Hawkswood Consultancy Limited | Extraterritorial | 2022 |
| Jenway Industries Co., Ltd. | Administrative & support | 2024 |
| Jephson Property Group Limited | Financial services | 2019 |
| Jess Williams Ltd | Professional & scientific | 2019 |
| Jester Consulting Limited | Professional & scientific | 2013 |
| Jetour Supply Chain (Shandong) Co., Ltd | Administrative & support | 2026 |
| Jewellery Fusion Ltd | Wholesale & retail | 2022 |
| JFS Technical Consulting Ltd | Professional & scientific | 2014 |
| JG Social Work Limited | Health & social care | 2022 |
| JGS Facilities Limited | Professional & scientific | 2015 |
| JH Global Industrial Limited | Manufacturing | 2023 |
| JIA WEI Technology Co., Ltd. | Extraterritorial | 2019 |
| JIA YIN Garment Co., Ltd | Administrative & support | 2023 |
| Jiachengruida Limited | Administrative & support | 2022 |
| Jiahan International Co., Ltd | Manufacturing | 2024 |
| Jialilai Co., Ltd | Administrative & support | 2024 |
| Jiang Xiaomi Trading Co. , Ltd. | Wholesale & retail | 2024 |
| Jiangsu Golden Agrochemical Co., Ltd | Extraterritorial | 2017 |
| Jiangsu Hongwang Steel Co., Ltd | Administrative & support | 2023 |
| Jiangsu Hoson Auto Parts Co., Limited | Extraterritorial | 2017 |
| Jiangsu Tisco Metal Co., Ltd | Administrative & support | 2023 |
| Jiangsu Yusung Hardware Trading Co., Ltd | Administrative & support | 2020 |
| Jiaocheng Tianlong Chemical Industry Co., Ltd | Extraterritorial | 2013 |
| Jiayi Electronic Commerce Company Limited | Administrative & support | 2024 |
| Jietushanhaibl Co., Ltd | Wholesale & retail | 2025 |
| Jifeng Trading Limited | Administrative & support | 2021 |
| Jigsaw CCS Limited | Administrative & support | 2017 |
| Jigsaw Warwickshire Joinery Limited | Construction | 2013 |
| JIN SHI YI Limited | Administrative & support | 2022 |
| Jinan Lihuayi Chemical Co., Ltd | Administrative & support | 2026 |
| Jinan Yuska International Trading Co., Ltd | Administrative & support | 2026 |
| Jinboli International Trade Co., Ltd | Manufacturing | 2025 |
| Jing XU Technology Limited | Wholesale & retail | 2021 |
| Jingran Technology PTE. Ltd | Extraterritorial | 2021 |
| Jingrong Import and Export Co., Limited | Wholesale & retail | 2020 |
| Jingtex Accessory Co., Ltd | Extraterritorial | 2018 |
| Jinhua Jielongte Tools Co., Ltd | Wholesale & retail | 2018 |
| Jinhua Weihai Plexiglass Product Co., Ltd | Extraterritorial | 2018 |
| Jinxuan Wayne Wares Ltd | Extraterritorial | 2018 |
| Jinyin Hose Co., Ltd. | Extraterritorial | 2018 |
| Jinyu Import and Export Co., Ltd | Wholesale & retail | 2021 |
| JJ Support Services Ltd | Administrative & support | 2025 |
| JK Groundworks Ltd | Construction | 2025 |
| JL Holdings and Investments Limited | Administrative & support | 2023 |
| Joana Veiga Consulting Limited | Health & social care | 2024 |
| JOE BUR Letting Services Ltd | Real estate | 2026 |
| John Berney & Associates Limited | Professional & scientific | 2004 |
| John Minshull Limited | Financial services | 1974 |
| Join Sill Limited | Administrative & support | 2024 |
| Join US Trading Co., Ltd | Administrative & support | 2021 |
| Jomoto Limited | Administrative & support | 2005 |
| Jonas Management Ltd | Households | 2014 |
| Jonyearhi Ltd | Administrative & support | 2026 |
| Jord Health Products Ltd | Wholesale & retail | 2024 |
| Joseph B Mills Ltd | Information & communication | 2018 |
| Joshua Mann Wealth Management Ltd | Financial services | 2024 |
| Joy International Trading Co., Ltd | Administrative & support | 2014 |
| Joyflesh Co., Ltd. | Extraterritorial | 2017 |
| Joywah International Co., Limited | Wholesale & retail | 2019 |