| Investment Casting Plastics Limited | Extraterritorial | 2012 |
| Investment Casting Systems Limited | Manufacturing | 2007 |
| Isla Coco Ltd | Wholesale & retail | 2026 |
| IT Live Services Ltd | Information & communication | 2026 |
| It's a Global Affair Ltd | Administrative & support | 2024 |
| IVY Lane Cocktail Bar Ltd | Hospitality | 2025 |
| J & F Trading Limited | Administrative & support | 2016 |
| J & H Telecommunications Ltd | Information & communication | 2017 |
| J K Somers & Sons Ltd | Construction | 2020 |
| J&C General Builders Limited | Construction | 2021 |
| J&S Résidences Limited | Real estate | 2026 |
| J.D.A. Plastering Limited | Construction | 2011 |
| J.M. Farrier Ltd | Professional & scientific | 2015 |
| J.R. Montgomery Limited | Real estate | 2010 |
| JAM and Bread Collective CIC | Hospitality | 2026 |
| James Allison Accountants Ltd | Professional & scientific | 2010 |
| James Robinson Cars Limited | Wholesale & retail | 2025 |
| James Rundle Properties Limited | Real estate | 2018 |
| Jargonaut Press Limited | Information & communication | 2023 |
| Jargonautical Ltd | Professional & scientific | 2014 |
| Javies EST Ltd | Construction | 2023 |
| Jazz Hands CIC | Arts & recreation | 2018 |
| JB Electrical SW Ltd | Construction | 2025 |
| JBE Garage Ltd | Wholesale & retail | 2024 |
| JC Carpentry SW Ltd | Construction | 2024 |
| JC Developments (SW) Ltd | Construction | 2013 |
| JC Holdings (SW) Ltd | Financial services | 2020 |
| JDC QS Services Ltd | Construction | 2015 |
| Jdhs Management Ltd | Real estate | 2021 |
| JEM Marketing (Devon) Ltd | Professional & scientific | 2025 |
| Jennifer Evans Aesthetic’S Ltd | Other services | 2025 |
| Jeremy Huggett's Musical Guild CIC | Education | 2024 |
| JFC Management Consultants Limited | Administrative & support | 2004 |
| JFD Group Limited | Financial services | 2022 |
| JFD Motors Limited | Wholesale & retail | 2022 |
| JH Music Promotions Ltd | Arts & recreation | 2023 |
| Jingles Hospitality Ltd | Hospitality | 2020 |
| Jingles Torbay Limited | Hospitality | 2019 |
| JJ & GJ PUB Enterprise Ltd | Hospitality | 2023 |
| Jjfw Properties Ltd | Real estate | 2025 |
| JK Holdings (Devon) Ltd | Financial services | 2026 |
| JKM Accessories Ltd | Wholesale & retail | 2018 |
| JL Southwest Ltd | Administrative & support | 2021 |
| JLR Distribution Limited | Wholesale & retail | 2025 |
| JME Marine Ltd | Professional & scientific | 2019 |
| JME Roofing Services Ltd | Construction | 2023 |
| JML Property Maintenance Ltd | Construction | 2018 |
| JML Property SW Ltd | Real estate | 2021 |
| JO Joes Tilehurst Limited | Other services | 2008 |
| JOE Hawes Properties Ltd | Real estate | 2024 |
| John Gordon Carpentry Ltd | Construction | 2018 |
| Johnny Greenland Taxis Limited | Transport & logistics | 2005 |
| Joinery Solutions SW Ltd | Manufacturing | 2019 |
| JON Keyte Real Estate Ltd | Real estate | 2025 |
| Jonathan Matthew Limited | Wholesale & retail | 2025 |
| Journey Protector (Uksw) Limited | Information & communication | 2025 |
| JPH Site Solutions Limited | Construction | 2014 |
| JRI Trading Ltd | Wholesale & retail | 2022 |
| Js.Petite.Masion Ltd | Real estate | 2026 |
| JSA Clothing Ltd | Wholesale & retail | 2018 |
| JT Fishing Ltd | Agriculture & fishing | 2023 |
| K and R Farm & Contracting Services Ltd | Agriculture & fishing | 2025 |
| K Ottaway Plant Hire Ltd | Other services | 2025 |
| K&Sr Ltd | Households | 2025 |
| K.Ottaway Lettings Ltd | Real estate | 2024 |
| K.Ottaway Pipelines Ltd | Construction | 2019 |
| K.R.K Transport and Logistics Limited | Transport & logistics | 2025 |
| KA Mini Market Ltd | Wholesale & retail | 2022 |
| Kaleidoscope Clubs & Courses Limited | Education | 2015 |
| Kaming 888 Ltd | Hospitality | 2024 |
| Kankali Mata Ltd | Hospitality | 2015 |
| Kantina Limited | Hospitality | 2016 |
| Karen Breyley Ltd | Health & social care | 2018 |
| Katie & COL Ltd | Hospitality | 2021 |
| Katie Walker Ltd | Arts & recreation | 2025 |
| KCB Plastering Ltd | Construction | 2021 |
| Kernow Koffi Limited | Hospitality | 2011 |
| Kethla Guest House Ltd | Hospitality | 2021 |
| Kiango Assets Ltd | Real estate | 2026 |
| Kididies R US Limited | Wholesale & retail | 2017 |
| Kieron Harwood Tiling Ltd | Construction | 2026 |
| King Cabs Ltd | Transport & logistics | 2025 |
| Kingsdale (Torquay) Residents Association Limited | Households | 1995 |
| Kirby Utilities Ltd | Construction | 2026 |
| Kirkwall Ltd | Hospitality | 1999 |
| KK Fitness Ltd | Arts & recreation | 2017 |
| KK Foods SW Limited | Hospitality | 2022 |
| KK Restaurants SW Limited | Hospitality | 2020 |
| Kleara Beauty Ltd | Manufacturing | 2025 |
| Klickshot Limited | Information & communication | 2026 |
| KMA Painting & Decorating Ltd | Construction | 2025 |
| Kobi Property Ltd | Real estate | 2025 |
| Kobi Terra Ltd | Real estate | 2026 |
| Komputrade Ltd | Information & communication | 2011 |
| Koonamparayil Investments Ltd | Real estate | 2022 |
| Kramer Equestrian Ltd. | Wholesale & retail | 2015 |
| KTB Investments Limited | Real estate | 2018 |
| KTB Ltd | Professional & scientific | 2017 |
| KWC DVS Limited | Construction | 1985 |
| Kyber Shipping Ltd | Transport & logistics | 2026 |