| Idesign Consultancy Ltd | Administrative & support | 2015 |
| Idevelop Software Ltd | Information & communication | 1995 |
| Iedistributors Ltd | Wholesale & retail | 2026 |
| IFH Enterprise Ltd | Wholesale & retail | 2023 |
| IFS Property Group Limited | Real estate | 2025 |
| Iglesia Cristiana Favor of GOD Ltd | Other services | 2016 |
| IGS Auto Ltd | Wholesale & retail | 2022 |
| IJS Medical Writing Ltd | Professional & scientific | 2016 |
| IJZ Virdee Limited | Wholesale & retail | 2009 |
| IK Translation Services Ltd | Professional & scientific | 2026 |
| Ikigaia Ltd | Manufacturing | 2024 |
| Imaan Property Investments Limited | Real estate | 2017 |
| Imaging Partnership Education Limited | Professional & scientific | 2011 |
| IMI Enterprise Ltd | Transport & logistics | 2023 |
| Impact Advisers Ltd | Professional & scientific | 2020 |
| Impact Imaging Limited | Professional & scientific | 2026 |
| Imperial Metal Polishing Limited | Manufacturing | 2009 |
| Imperial Motors Hub Ltd | Wholesale & retail | 2020 |
| IMPET2US Limited | Wholesale & retail | 2003 |
| Impi Freight Ltd | Transport & logistics | 2018 |
| Imprenza Limited | Information & communication | 2010 |
| Impress Aesthetics Ltd | Other services | 2025 |
| IMS Technology (Midlands) Limited | Information & communication | 2012 |
| IMT Properties Limited | Real estate | 2017 |
| Imtx Ltd | Transport & logistics | 2022 |
| Inasca Wealth and Mortgages Limited | Financial services | 2020 |
| Includo Finance Limited | Financial services | 2018 |
| Inclusion Independence Limited | Health & social care | 2017 |
| Inclusive Minds Education Ltd | Education | 2024 |
| Indecision Properties Limited | Real estate | 2025 |
| Indian Ocean Stourbridge Ltd | Hospitality | 2019 |
| Indiluxe Indian Restaurant Ltd | Hospitality | 2025 |
| Industrial Screen Print Limited | Manufacturing | 2022 |
| Industrial Trade Catalogue Ltd | Wholesale & retail | 2020 |
| Inem Abiodun Ltd | Professional & scientific | 2021 |
| Infinity Beds Ltd | Manufacturing | 2026 |
| Infinity Furniture Solutions Ltd | Wholesale & retail | 2022 |
| Inflate My Events Ltd | Hospitality | 2022 |
| Inhome Property Holdings Limited | Real estate | 2026 |
| Inhome Property Solutions Limited | Households | 2023 |
| Inisio Limited | Information & communication | 2011 |
| INK Stitch Limited | Wholesale & retail | 2015 |
| Inlandcare Services Ltd | Health & social care | 2021 |
| Inn Line Cellar Services Limited | Other services | 2008 |
| Inner Space Coaching and Consultancy Ltd | Professional & scientific | 2017 |
| Innovation in Transport Limited | Manufacturing | 2017 |
| Innovative Digital Solutions Ltd | Information & communication | 2015 |
| Insight Builders Limited | Wholesale & retail | 1995 |
| Insight Training & Development Limited | Professional & scientific | 2011 |
| Insightbridge Analytics Ltd | Information & communication | 2025 |
| Insolvency 4 U Ltd | Professional & scientific | 2024 |
| Inspiring Advisers Limited | Financial services | 1998 |
| Insq Ltd | Information & communication | 2021 |
| Instillexcellence Ltd | Education | 2013 |
| Insurance 2 Day Insurance Services Limited | Financial services | 2000 |
| Integraflow Limited | Wholesale & retail | 2024 |
| Integrate Health Ltd | Health & social care | 2023 |
| Intelligent Life Safety Systems Limited | Wholesale & retail | 2011 |
| Inter Wellbeing Limited | Professional & scientific | 2017 |
| Intercontinental Operating Company Limited | Wholesale & retail | 1998 |
| Interior Decor Limited | Construction | 2002 |
| Intermondial Trade Limited | Wholesale & retail | 2011 |
| Interwoven Impact CIC | Administrative & support | 2019 |
| Intro Films Limited | Information & communication | 2024 |
| Inventory Solutions and Surveys Limited | Extraterritorial | 2013 |
| Inventory Solutions Limited | Extraterritorial | 2013 |
| Inverted Bird Ltd | Wholesale & retail | 2025 |
| Investal Ltd | Professional & scientific | 2022 |
| Investment House Limited | Real estate | 2020 |
| Invictus Property Limited | Real estate | 2016 |
| Invoke Dance and Wellness Ltd | Education | 2024 |
| Ipda Limited | Arts & recreation | 2015 |
| Ipda-Quashie Ltd | Arts & recreation | 2019 |
| IQ Locum Ltd | Health & social care | 2023 |
| Iris Claims Solutions Ltd | Financial services | 2021 |
| Iris Commercials Limited | Manufacturing | 2016 |
| Irmab EYE Care Limited | Health & social care | 2025 |
| Iron Design (West Midlands) Limited | Manufacturing | 2007 |
| Irton Services Limited | Professional & scientific | 2024 |
| Isletta Reform Studio Limited | Arts & recreation | 2025 |
| IT Info Systems Limited | Construction | 2007 |
| IT SNJ Solutions Limited | Professional & scientific | 2016 |
| Italian Pizza Birmingham Ltd | Hospitality | 2023 |
| Itby Limited | Information & communication | 2023 |
| Iteration Limited | Information & communication | 1995 |
| Iverley Lodge Boarding Kennels Limited | Administrative & support | 2007 |
| Iverley Outdoor Adventures Ltd | Arts & recreation | 2025 |
| IVY Concierge Limited | Professional & scientific | 2025 |
| IVY Nail Bar 203 Ltd | Other services | 2024 |
| IW Propertys Ltd | Real estate | 2023 |
| Ixel Mech Design Ltd | Professional & scientific | 2023 |
| Ixmai Ltd | Households | 2024 |
| J & F Poulton Limited | Administrative & support | 2014 |
| J & F Properties Limited | Construction | 2016 |
| J & L Builders Limited | Construction | 2006 |
| J & L Properties Stourbridge Limited | Professional & scientific | 2011 |
| J & S Surgery Limited | Health & social care | 2006 |
| J and J Properties (Latchford) Limited | Real estate | 2007 |
| J B Property Investments (Midlands) Limited | Wholesale & retail | 2016 |
| J Brett Autos Ltd | Wholesale & retail | 2024 |