| Insania Express Limited | Transport & logistics | 2020 |
| Insavio Ltd | Wholesale & retail | 2025 |
| Inscape Developments Ltd | Construction | 2018 |
| Inscape Horizons Ltd | Construction | 2019 |
| Inscents Toiletries Ltd | Wholesale & retail | 2002 |
| Insclad Investments Limited | Financial services | 2017 |
| Inscyte Limited | Professional & scientific | 2005 |
| Insect Agrifeed Trade Co. Limited | Wholesale & retail | 2021 |
| Insecta Nest UK Limited | Real estate | 2020 |
| Insello Ltd | Professional & scientific | 2013 |
| INSFOODS1 Ltd | Hospitality | 2025 |
| Insha Store Ltd | Wholesale & retail | 2025 |
| Inside Farway Trading Ltd | Wholesale & retail | 2021 |
| Inside OUT Painting Services Ltd | Construction | 2020 |
| INSIDE-2-OUT CIC | Information & communication | 2021 |
| Insight Accounting Solutions Limited | Professional & scientific | 2025 |
| Insight Crafts Marketing Ltd | Professional & scientific | 2025 |
| Insight Global Consulting Ltd | Administrative & support | 2025 |
| Insight Learning Ltd | Education | 2025 |
| Insight Management Services and Information Governance Ltd | Information & communication | 2018 |
| Insight Midlands C.I.C. | Health & social care | 2012 |
| Insight Optical Limited | Health & social care | 2010 |
| Insight Project Ctrl Ltd | Professional & scientific | 2022 |
| Insight Society Services CIC | Education | 2024 |
| INSIGHT7 Consulting Limited | Professional & scientific | 2019 |
| Insightbridge Consulting Limited | Information & communication | 2026 |
| Insightmarket Limited | Arts & recreation | 1999 |
| Insightpro Services Ltd | Real estate | 2025 |
| Insightsphere Consulting Ltd | Professional & scientific | 2025 |
| Insightsphere Limited | Professional & scientific | 2020 |
| Insignia Property Solutions Limited | Real estate | 2020 |
| Insignia Services Ltd | Construction | 2022 |
| Insimbi Consulting Ltd | Information & communication | 2019 |
| Insion Limited | Information & communication | 2016 |
| Insol Funding Company Limited | Financial services | 2001 |
| Insol Group Limited | Financial services | 2003 |
| Insolved Holdings Ltd | Professional & scientific | 2017 |
| Insomnia Burger Limited | Hospitality | 2025 |
| Inspectiva Solutions Ltd | Households | 2025 |
| Inspectra Inspection Services Limited | Professional & scientific | 2024 |
| Inspiration Hair Nails and Beauty Limited | Other services | 2018 |
| Inspire (Derby) Limited | Education | 2017 |
| Inspire 4 Kidz Homeschooling Ltd | Education | 2021 |
| Inspire Anywhere Limited | Education | 2020 |
| Inspire Business Development Limited | Professional & scientific | 2010 |
| Inspire Children's Home Ltd | Health & social care | 2025 |
| Inspire Community Advice Service CIC | Public administration | 2020 |
| Inspire Consultancy Limited | Administrative & support | 2007 |
| Inspire Education Community Trust | Education | 2016 |
| Inspire Enterprise Ltd | Professional & scientific | 2015 |
| Inspire Excel Ltd | Professional & scientific | 2022 |
| Inspire Generations Ltd | Education | 2022 |
| Inspire HNA Ltd | Health & social care | 2025 |
| Inspire Hub Central CIC | Education | 2025 |
| Inspire Hub Ltd | Education | 2024 |
| Inspire Insurance Services Ltd | Financial services | 2010 |
| Inspire International UK Ltd | Professional & scientific | 2008 |
| Inspire IQ Ltd | Real estate | 2024 |
| Inspire Journeys Ltd | Education | 2025 |
| Inspire Kitchens & Bathrooms WM Ltd | Manufacturing | 2017 |
| Inspire Learning Labs Limited | Education | 2025 |
| Inspire My Products Ltd | Wholesale & retail | 2025 |
| Inspire Potential Limited | Health & social care | 2019 |
| Inspire Products Ltd | Wholesale & retail | 2015 |
| Inspire Showhomes and Relocations Limited | Transport & logistics | 2019 |
| Inspire Support Ltd | Administrative & support | 2024 |
| Inspire Supported Accommodation Ltd | Real estate | 2015 |
| Inspire Supported Housing Ltd | Real estate | 2025 |
| Inspire to Create Ltd | Arts & recreation | 2018 |
| Inspire YOU Care Ltd | Health & social care | 2017 |
| Inspire Your Property Group Ltd | Real estate | 2023 |
| Inspire-A-Doll Ltd | Wholesale & retail | 2021 |
| INSPIRE2GETHER CIC | Other services | 2024 |
| INSPIRE2RIZE CIC | Education | 2022 |
| Inspired 2 Connect CIC | Administrative & support | 2020 |
| Inspired 2 Consultancy Ltd | Professional & scientific | 2019 |
| Inspired at Work Ltd | Professional & scientific | 2019 |
| Inspired Blooms Limited | Wholesale & retail | 2024 |
| Inspired by Africa-Holidays Limited | Administrative & support | 2005 |
| Inspired by JLG Ltd | Information & communication | 2017 |
| Inspired by YOU Ltd | Manufacturing | 2021 |
| Inspired Creative & Design Limited | Information & communication | 2005 |
| Inspired Delivery Services 0612 Ltd | Transport & logistics | 2025 |
| Inspired FM Ltd | Administrative & support | 2024 |
| Inspired Holdings Limited | Real estate | 2025 |
| Inspired Housing Ltd | Real estate | 2018 |
| Inspired INK Limited | Arts & recreation | 2023 |
| Inspired Italy Limited | Administrative & support | 2012 |
| Inspired Kreations Limited | Other services | 2019 |
| Inspired Links CIC | Health & social care | 2025 |
| Inspired Movement Limited | Other services | 2012 |
| Inspired Patient Handling Limited | Wholesale & retail | 2017 |
| Inspired Sports Solutions Limited | Arts & recreation | 2015 |
| Inspired Supported Housing Ltd | Real estate | 2021 |
| Inspired Supported Living Ltd | Health & social care | 2025 |
| Inspired Team Wear Solutions Limited | Wholesale & retail | 2022 |
| Inspired Thinking Group (ITG) Limited | Information & communication | 1994 |
| Inspired Thinking Group Holdings Limited | Financial services | 2009 |
| Inspired Training and Mentoring CIC | Education | 2019 |
| Inspired Vision Limited | Information & communication | 2024 |