| I DRY Ltd | Manufacturing | 2018 |
| I M Martin Limited | Real estate | 1999 |
| I Site Telecom Limited | Real estate | 2001 |
| I T Culliss Motors Limited | Wholesale & retail | 2010 |
| Iain Anderson Ltd | Financial services | 2023 |
| IAN Cliff Garden Machinery Limited | Wholesale & retail | 2010 |
| IAN Jones Carpets & Flooring Ltd | Construction | 2001 |
| IAN Mound - Evans Limited | Construction | 2015 |
| IAN Owen Motor Services Limited | Wholesale & retail | 2003 |
| IAN Stones Control Limited | Information & communication | 2017 |
| IAN Styles Accountants Limited | Professional & scientific | 2008 |
| IAN Wall Complete Building Services Limited | Administrative & support | 2015 |
| IBEAUTY4U Ltd | Other services | 2018 |
| Ibrahim Tariq Ltd | Wholesale & retail | 2025 |
| Ic&Pm Ltd | Information & communication | 2017 |
| Icap Community Limited | Other services | 2020 |
| Icarus Originals Ltd | Manufacturing | 2018 |
| ICC (Midlands) Ltd | Other services | 2023 |
| ICH & TJH Holdings Ltd | Financial services | 2025 |
| ICS Business Connections Limited | Professional & scientific | 2021 |
| Idea Ingham Energy Ltd | Professional & scientific | 2007 |
| Idonix Limited | Information & communication | 1998 |
| IEF Projects Limited | Professional & scientific | 2024 |
| IGC Enterprises Ltd | Information & communication | 2009 |
| Ignite Potential Limited | Education | 2020 |
| Ignition Create Community Interest Company | Administrative & support | 2015 |
| Ihollywood Limited | Professional & scientific | 2010 |
| IIC Holdings Limited | Financial services | 2025 |
| IIC Products Limited | Manufacturing | 2018 |
| Ikey Studios Ltd | Professional & scientific | 2025 |
| Ilea (Shrewsbury) Limited | Health & social care | 2016 |
| Ilea Palm Care Ltd | Health & social care | 2019 |
| IMA Aggregate Solutions Limited | Transport & logistics | 2023 |
| IMD Construction Ltd | Construction | 2006 |
| IMD Holdings Ltd | Financial services | 2024 |
| IMG Sales Programs Limited | Administrative & support | 2018 |
| Impact Analysts Ltd | Wholesale & retail | 2025 |
| Impact PAY Ltd | Financial services | 2014 |
| Impact Sports, Fitness & Performing Arts Ltd | Arts & recreation | 2024 |
| Imperium Sport Ltd | Arts & recreation | 2018 |
| Implantiem Ltd | Wholesale & retail | 2020 |
| Implantium UK Ltd | Administrative & support | 2008 |
| Independent Audit Solutions Ltd | Administrative & support | 2011 |
| Independent Auditors LLP | | 2005 |
| Independent Cookery Schools Association | Hospitality | 2014 |
| Independent User HW - Bespoke Support Service Limited | Other services | 2016 |
| Indianised PVT Ltd | Hospitality | 2026 |
| Indigenous Tree Limited | Manufacturing | 2015 |
| Indigo Seven Limited | Wholesale & retail | 1993 |
| Indoor Cat Ltd | Wholesale & retail | 2017 |
| Industrial Devices (GB) Limited | Wholesale & retail | 2002 |
| Industrial Devices (UK) Limited | Wholesale & retail | 1996 |
| Industrial Devices Group Limited | Financial services | 2021 |
| Industrial Engineering Designers (UK) Limited | Manufacturing | 2004 |
| Industrial Speciality Lubricants Limited | Extraterritorial | 2009 |
| Industrialised Construction Media Limited | Information & communication | 2025 |
| Inflow Performance Ltd | Other services | 2015 |
| Info Quick UK Ltd | Information & communication | 2015 |
| Information Solutions Limited | Information & communication | 2003 |
| Ingenium Search Limited | Professional & scientific | 2011 |
| Inger Property Solutions Limited | Real estate | 2020 |
| Ingham Electrical and Construction Limited | Construction | 2018 |
| Ingham Electrical Limited | Construction | 2021 |
| Ingielewicz Ltd | Administrative & support | 2015 |
| Ingpro Limited | Professional & scientific | 2000 |
| Inico Learning and Development Ltd | Education | 2024 |
| Inman Psychology Limited | Education | 2024 |
| Inner Darkness Tattoos Ltd | Administrative & support | 2020 |
| INNOV8ED Education Ltd | Education | 2023 |
| Innovate Plumb + Heat Ltd | Construction | 2018 |
| Innovation Sunday Limited | Financial services | 2015 |
| Innovative Program Solutions Ltd | Professional & scientific | 2022 |
| Innovetive Physiotherapy Limited | Other services | 2011 |
| Inovar Communications Limited | Information & communication | 2005 |
| Inroads International Holdings Limited | Financial services | 2019 |
| Insequor Ltd | Administrative & support | 2016 |
| Insert Productions Limited | Professional & scientific | 2021 |
| Insight Diagnostics Ltd | Health & social care | 2025 |
| Insight Event Management Limited | Administrative & support | 2013 |
| Inspection Improvement Services Ltd | Education | 2013 |
| Inspirational HR Consultancy Services Ltd | Administrative & support | 2022 |
| Inspired Interaction Limited | Information & communication | 2018 |
| Insta-Lec Shrewsbury Electrical Services Limited | Manufacturing | 2026 |
| Insta-Lec Shropshire Ltd | Manufacturing | 2020 |
| Instant Cryo Limited | Extraterritorial | 2020 |
| Instant Cryotherapy Limited | Information & communication | 2020 |
| Intalix AI Ltd | Professional & scientific | 2026 |
| Intavoice Limited | Information & communication | 2013 |
| Integrity Testing Limited | Professional & scientific | 2014 |
| Intellimatic Limited | Information & communication | 2021 |
| Inter County Logistics (Salop) Limited | Transport & logistics | 2016 |
| Inter County Pallets Limited | Transport & logistics | 2026 |
| Interactive Information Services Ltd | Information & communication | 1994 |
| Interims for Energy Limited | Professional & scientific | 2015 |
| International EGG Commission Limited | Administrative & support | 2010 |
| International Resource Consulting Ltd | Administrative & support | 2010 |
| Interpulse Limited | Information & communication | 1996 |
| Interrupt 22 Limited | Information & communication | 2025 |
| Intune Radio CIC | Information & communication | 2021 |
| Invar Mapping Surveys Limited | Construction | 2007 |