| Inno R Ltd | Education | 2020 |
| Innoecon Consulting Limited | Professional & scientific | 2023 |
| Innova Corp Ltd | Administrative & support | 2025 |
| Innova Medical Equipment Management Services Ltd | Professional & scientific | 2025 |
| Innovate 24-7 Ltd | Information & communication | 2024 |
| Innovate and J Ltd | Information & communication | 2026 |
| Innovate International Education Ltd | Education | 2019 |
| Innovation AGE Limited | Professional & scientific | 2008 |
| Innovation Electrical & Data Ltd | Construction | 2011 |
| Innovation Engineering Group Ltd | Financial services | 2014 |
| Innovation for Sustainable Development Ltd | Professional & scientific | 2023 |
| Innovation Group Products Ltd | Manufacturing | 2019 |
| Innovation Home Services Limited | Construction | 2013 |
| Innovation Laser Limited | Manufacturing | 2016 |
| Innovation Nottinghamshire Limited | Professional & scientific | 2020 |
| Innovation Property Solutions LLP | | 2014 |
| Innovation Sheet Metal Limited | Manufacturing | 2017 |
| Innovation Source Limited | Professional & scientific | 2016 |
| Innovation to Industry Limited | Professional & scientific | 2014 |
| Innovative Bathrooms Ltd | Construction | 2011 |
| Innovative Educational Resources Ltd | Wholesale & retail | 2018 |
| Innovative Logistix Ltd | Transport & logistics | 2021 |
| Innoventa Project Solutions Ltd | Professional & scientific | 2025 |
| Innoventra Ltd | Information & communication | 2024 |
| Innovex Group Limited | Financial services | 2020 |
| Innovo Living Limited | Financial services | 2020 |
| Innovy Portal Ltd | Information & communication | 2014 |
| Inoji Limited | Professional & scientific | 2013 |
| Inova Properties Ltd | Real estate | 2021 |
| Inove Limited | Manufacturing | 1998 |
| Inovo Consulting Limited | Information & communication | 2020 |
| Inphase Limited | Professional & scientific | 1995 |
| Input Technologies Limited | Information & communication | 1995 |
| Inqlabi Development AID Limited | Education | 2006 |
| Inquisitive Productions Ltd | Manufacturing | 2023 |
| Inra & Co Holdings Ltd | Real estate | 2025 |
| Inru Properties Ltd | Real estate | 2024 |
| Ins-Uk Holdings Ltd | Wholesale & retail | 2022 |
| Insanely Great Company Limited | Financial services | 2017 |
| Insanely Great Holdings Limited | Financial services | 2017 |
| Inserta Fire Barrier Ltd | Construction | 2018 |
| Inside OUT Glazing Ltd | Construction | 2026 |
| Inside OUT Group (Europe) Limited | Professional & scientific | 2008 |
| Inside OUT Nutrition UK Limited | Wholesale & retail | 2009 |
| Inside the Box Food Service Limited | Hospitality | 2019 |
| Insideops Limited | Information & communication | 2012 |
| Insideout Ideas Limited | Professional & scientific | 2009 |
| Insideout Media & Print Ltd | Manufacturing | 2021 |
| Insiders Group Ltd | Information & communication | 2016 |
| Insight Business Operations Limited | Professional & scientific | 2017 |
| Insight Care Services Ltd | Education | 2019 |
| Insight Care Youth Training & Community CIC | Education | 2019 |
| Insight Coaching & Development Limited | Education | 2025 |
| Insight Events Group Ltd | Information & communication | 2020 |
| Insight HP Ltd | Arts & recreation | 2022 |
| Insight Legal Ltd | Professional & scientific | 2016 |
| Insight Planning & Analytics Ltd | Professional & scientific | 2021 |
| Insight Risk Consulting Limited | Administrative & support | 2012 |
| Insight Securities Services Ltd | Administrative & support | 2026 |
| Insight Solutions Dynamics Limited | Information & communication | 2012 |
| Insight Tutoring Ltd | Education | 2016 |
| Insight, Integrity and Energy Limited | Professional & scientific | 2017 |
| Insightedges Consulting Limited | Information & communication | 2025 |
| Insightful Research Ltd | Administrative & support | 2019 |
| Insightpath Ltd | Professional & scientific | 2025 |
| Insigma Estates Limited | Real estate | 2025 |
| Insignia Aroma Ltd | Real estate | 2025 |
| Insomniacz Events Ltd | Administrative & support | 2025 |
| Inspection Network Limited | Professional & scientific | 2004 |
| INSPIR8 Group Limited | Wholesale & retail | 2022 |
| Inspirational Design Limited | Construction | 2013 |
| Inspirations Care Ltd | Health & social care | 2019 |
| Inspirations Care Properties Ltd | Real estate | 2026 |
| Inspirations West Bridgford Limited | Wholesale & retail | 2008 |
| Inspire 123 Ltd | Administrative & support | 2023 |
| Inspire Building Control Limited | Construction | 2007 |
| Inspire Care (UK) Limited | Health & social care | 2010 |
| Inspire Care Solutions Limited | Health & social care | 2023 |
| Inspire Data Ltd | Information & communication | 2019 |
| Inspire Distribution Ltd | Transport & logistics | 2023 |
| Inspire Football Academy Ltd | Arts & recreation | 2023 |
| Inspire Gymnastics Academy C.I.C. | Arts & recreation | 2015 |
| Inspire Health Rituals Limited | Health & social care | 2025 |
| Inspire Incentives Limited | Professional & scientific | 2018 |
| Inspire Nottingham | Education | 2008 |
| Inspire Nottingham Football Club Ltd | Arts & recreation | 2025 |
| Inspire Online Tuition Ltd | Education | 2021 |
| Inspire OT Ltd | Health & social care | 2023 |
| Inspire Outdoors Ltd | Professional & scientific | 2019 |
| Inspire Property Development Limited | Other services | 2014 |
| Inspire UK Property Investment Ltd | Real estate | 2019 |
| INSPIRE22BUILD Ltd | Construction | 2025 |
| INSPIRE2RENT Limited | Real estate | 2024 |
| Inspired Coaches CIC | Professional & scientific | 2023 |
| Inspired Electrical Ltd | Construction | 2019 |
| Inspired Hifi Limited | Professional & scientific | 2013 |
| Inspired Moves Limited | Other services | 2021 |
| Inspired Solar Ltd | Construction | 2025 |
| Inspired Villages Group Limited | Financial services | 2017 |
| Inspired Washrooms Ltd | Construction | 2020 |