| Iron Works (SW) Ltd | Manufacturing | 2016 |
| IRS Group (SW) Ltd | Administrative & support | 2025 |
| ITC Community Sports Ltd | Arts & recreation | 2026 |
| Ivan Toms Limited | Agriculture & fishing | 2015 |
| IVY Gold Exchange Limited | Wholesale & retail | 2025 |
| IVY Laser Clinic Limited | Other services | 2026 |
| IVY Pizza Ltd | Hospitality | 2026 |
| Ivybridge & District Community Transport Association | Transport & logistics | 2008 |
| Ivybridge Brewing Company C.I.C. | Manufacturing | 2018 |
| Ivybridge Car Wash Ltd | Administrative & support | 2025 |
| Ivybridge Dental Centre Limited | Health & social care | 2008 |
| Ivybridge Discount Ltd | Wholesale & retail | 2025 |
| Ivybridge Home Care Limited | Health & social care | 2019 |
| Ivybridge Outdoors & Leisure Limited | Wholesale & retail | 2018 |
| Ivybridge Repair Cafe C.I.C. | Other services | 2026 |
| Ivybridge Rugby Football Club Limited | Arts & recreation | 2011 |
| Ivybridge Taxis Limited | Transport & logistics | 2025 |
| Ivybridge Tennis Club | Arts & recreation | 1986 |
| Ivybridge Tile & Bathroom Limited | Construction | 2016 |
| Ivybridge Woodlands Court Management Company Limited | Households | 1993 |
| Ivydale Gardens (Ivybridge) Management Company Limited | Households | 2019 |
| J Banel Contracting SW Ltd | Construction | 2024 |
| J M Turns & Co Limited | Professional & scientific | 2014 |
| J Rowland Attractions Ltd | Arts & recreation | 2025 |
| J S Commercial Property Ltd | Construction | 2022 |
| J Weeks Electrical Ltd | Construction | 2025 |
| J. Whelan & Company Limited | Professional & scientific | 2020 |
| J.P. Business Administration Company Limited | Professional & scientific | 2011 |
| J3 Meridian Ltd | Construction | 2026 |
| J5RS Ltd | Hospitality | 2026 |
| Jackariaeh Limited | Manufacturing | 2022 |
| Jacksons Landscaping and Garden Design Limited | Administrative & support | 2026 |
| Jagger Utilities & Groundwork Services Limited | Construction | 2009 |
| James Hawkins Fencing Limited | Construction | 2025 |
| Jasmine Respite Retreat Ltd | Health & social care | 2026 |
| JAY Brown Ltd | Extraterritorial | 2018 |
| Jaya MA Durga Ltd | Hospitality | 2020 |
| Jayd Consulting Ltd | Professional & scientific | 2025 |
| Jays Holdings (SW) Limited | Financial services | 2025 |
| JBM Property and Letting Limited | Real estate | 2021 |
| JBM Sales Ltd | Wholesale & retail | 2019 |
| JC Motor Repairs Ltd | Wholesale & retail | 2024 |
| JCG Pubs Ltd | Hospitality | 2025 |
| Jess Thompson Ltd | Financial services | 2025 |
| Jesse James Limited | Professional & scientific | 2006 |
| JG Property Maintenance SW Ltd | Construction | 2024 |
| JGT Holdings Ltd | Professional & scientific | 2023 |
| JHJ Agencies (South West) Limited | Wholesale & retail | 2020 |
| Jilks Properties Ltd | Real estate | 2026 |
| JJM Property Management Co. Ltd | Households | 2013 |
| JJP Investments Ltd | Real estate | 2016 |
| JM North Services Ltd | Administrative & support | 2010 |
| Joanna Haigh Prints Ltd | Arts & recreation | 2025 |
| Joanne Clayton Skin Expert Limited | Other services | 2026 |
| John Butler Services Ltd | Construction | 2017 |
| John Grimes Partnership Limited | Construction | 2001 |
| Joseph Priest Goldsworthy Holdings Ltd | Extraterritorial | 2017 |
| Joseph Priest Goldsworthy Publishing Ltd | Administrative & support | 2017 |
| Jovi Hair Design Limited | Other services | 2012 |
| JP Cafe Ltd | Hospitality | 2025 |
| JR PAT Testing Limited | Other services | 2014 |
| JRD Building Services Ltd | Construction | 2017 |
| JSM Developments Ltd | Construction | 2024 |
| Just Imagine Parties & Play Ltd | Arts & recreation | 2019 |
| JV24 Brands Ltd | Professional & scientific | 2023 |
| JVL Cars Limited | Wholesale & retail | 2025 |
| K B Security & Training Ltd | Administrative & support | 2016 |
| K Crawley & Sons Ltd | Construction | 2012 |
| Kakinuma (Europe) Limited | Wholesale & retail | 2000 |
| Kaya Gallery Limited | Wholesale & retail | 2017 |
| Kayaks & Paddles (Manchester) Limited | Wholesale & retail | 2012 |
| Kayaks & Paddles (Plymouth) Limited | Wholesale & retail | 1996 |
| KBT Autocare Ltd | Wholesale & retail | 2024 |
| Keith Elliott Construction Limited | Construction | 2009 |
| Kelzo Limited | Manufacturing | 2003 |
| Kessell Ltd | Construction | 2014 |
| Kevelek Ltd | Extraterritorial | 2025 |
| Kevren Kerth Limited | Real estate | 2025 |
| KFOOD95 Ltd | Hospitality | 2026 |
| Kings Construction South West Ltd | Construction | 2022 |
| Kings Market Amenity II Limited | Real estate | 2005 |
| Kings Market Amenity Limited | Other services | 2005 |
| Kingsway Developments (Devon) Ltd | Real estate | 2013 |
| Kippers Fish and Chips Ltd | Hospitality | 2021 |
| Kirosoft Ltd | Information & communication | 2012 |
| KIS Engineering Ltd | Manufacturing | 2025 |
| KMJ Property (South West) Limited | Real estate | 2024 |
| Koala Karlous Ltd | Hospitality | 2022 |
| KR Locums Ltd | Health & social care | 2014 |
| Krac Group Ltd | Construction | 2025 |
| Krpa Properties Ltd | Real estate | 2024 |
| KS Cleaning Services SW Limited | Administrative & support | 2025 |
| KS Contracts Ltd | Construction | 2024 |
| KS Properties (SW) Ltd | Real estate | 2022 |
| Kulek Homes Limited | Construction | 2006 |
| Kurdish 4 Ltd | Hospitality | 2025 |
| Kurdish CUT Shop Ltd | Other services | 2024 |
| KV Realty Ltd | Real estate | 2024 |
| Kydd & Co Limited | Arts & recreation | 2003 |
| L D Building and Construction Ltd | Construction | 2021 |