| Ineos Quattro Finance 2 PLC | Financial services | 2020 |
| Ineos Quattro Financing 1 Limited | Professional & scientific | 2023 |
| Ineos Quattro Financing 2 Limited | Professional & scientific | 2023 |
| Ineos Quattro Financing Limited | Professional & scientific | 2015 |
| Ineos Quattro Holdings Limited | Professional & scientific | 2015 |
| Ineos Quattro Holdings UK Limited | Professional & scientific | 2020 |
| Ineos Racing Limited | Arts & recreation | 2018 |
| Ineos Sailing Limited | Professional & scientific | 2025 |
| Ineos Sales (UK) Limited | Manufacturing | 2010 |
| Ineos Saudi Arabia Holdings Limited | Professional & scientific | 2024 |
| Ineos Shipping Limited | Transport & logistics | 2018 |
| Ineos Silicas Holdings Limited | Professional & scientific | 2000 |
| Ineos Silicas Limited | Manufacturing | 1896 |
| Ineos Silicas Trustees Limited | Financial services | 2001 |
| Ineos Solvents Ethanol Limited | Manufacturing | 2015 |
| Ineos Solvents UK Limited | Manufacturing | 2015 |
| Ineos Tenderco Limited | Financial services | 2010 |
| Ineos Tianjin Holdings Limited | Professional & scientific | 2022 |
| Ineos Treasury (UK) Limited | Professional & scientific | 2000 |
| Ineos Trustees Limited | Other services | 1998 |
| Ineos UK SNS Limited | Mining & quarrying | 1971 |
| Ineos Upstream Finco 1 Limited | Professional & scientific | 2023 |
| Ineos Upstream Finco 2 Limited | Professional & scientific | 2023 |
| Ineos Upstream Holdings Limited | Mining & quarrying | 2017 |
| Ineos Upstream Limited | Mining & quarrying | 2014 |
| Ineos Upstream Services Limited | Mining & quarrying | 2015 |
| Ineos Vinyls Group Limited | Professional & scientific | 2002 |
| Ineos World-Wide Technical Services Limited | Other services | 1952 |
| INSTRUMA-3MQCS Limited | Professional & scientific | 2016 |
| Insyde Software Limited | Information & communication | 2003 |
| Into the Okavango Ltd | Administrative & support | 2023 |
| Jd&Nbg Limited | Hospitality | 2017 |
| Knightwood Mortgages Limited | Administrative & support | 2021 |
| KS Angels Rescue C.I.C. | Professional & scientific | 2025 |
| Lambert Estates Limited | Real estate | 2015 |
| Lass Studio Limited | Professional & scientific | 2023 |
| LCP Catering Limited | Hospitality | 2011 |
| Lemala Health Ltd | Health & social care | 2025 |
| Lettings Management Ltd | Real estate | 2019 |
| Lime Wood Group Limited | Hospitality | 1999 |
| Lindeum Ltd | Real estate | 2025 |
| Lisle Investments Limited | Other services | 2022 |
| Little Applewood Farm Limited | Agriculture & fishing | 2021 |
| Livetwice | Other services | 2014 |
| LIZ Earle Associated Productions Limited | Information & communication | 2012 |
| Lockright Security Ltd. | Administrative & support | 2001 |
| Loxwood Properties Ltd | Construction | 2017 |
| Lucien Marlais Limited | Information & communication | 2024 |
| Lumo Health Guide Ltd | Information & communication | 2025 |
| Lwcb Ltd | Extraterritorial | 2011 |
| Lymington GIN Ltd | Manufacturing | 2021 |
| Lymm Properties Limited | Real estate | 2013 |
| Lyndhurst Investments Limited | Households | 2022 |
| Lyndhurst Tea Room Ltd | Hospitality | 2023 |
| Mahamlyndhurst Limited | Hospitality | 2026 |
| Main Street Investments (Portsmouth) Limited | Real estate | 1984 |
| Main Street Investments Limited | Wholesale & retail | 1963 |
| Majestic Garage (Dorset) Limited | Wholesale & retail | 1974 |
| Major Aviation LLP | | 2017 |
| Malwood Aviation Limited | Administrative & support | 2003 |
| Management for FE Limited | Administrative & support | 2012 |
| Manor Park Farm Estates LLP | | 2021 |
| Mary Corbett Accountancy Ltd | Professional & scientific | 2012 |
| Mbfd Limited | Professional & scientific | 2023 |
| Meccsis Limited | Professional & scientific | 2012 |
| Mellor Heating & Plumbing Limited | Construction | 2010 |
| Meridien Milano Limited | Wholesale & retail | 2005 |
| Meridien Modena Limited | Wholesale & retail | 1982 |
| Michael Hanslip Limited | Construction | 2017 |
| Michael Hanslip Properties Ltd | Real estate | 2017 |
| Mint Gardens Ltd | Administrative & support | 2017 |
| Mir-Tcs Limited | Administrative & support | 2018 |
| Mroi Consultancy Ltd | Professional & scientific | 2019 |
| Nautilus Investments Ltd | Professional & scientific | 2004 |
| Navaho Technologies Limited | Information & communication | 1998 |
| NCP Lyndhurst Limited | Hospitality | 2025 |
| Networking Chandler's Ford | Professional & scientific | 2010 |
| New Forest Barber Ltd | Other services | 2026 |
| New Forest GIN Ltd | Manufacturing | 2021 |
| New Forest Heritage Trust | Arts & recreation | 2019 |
| New Forest Hotels PLC | Hospitality | 1981 |
| New Forest OFF Road Limited | Wholesale & retail | 2025 |
| New Forest Plumbing & Heating Solutions Ltd | Construction | 2004 |
| New Forest Property Sales Limited | Real estate | 2022 |
| New Forest Property Solutions Ltd | Construction | 2024 |
| New Forest Rentals Limited | Real estate | 2012 |
| New Nordic Limited | Manufacturing | 1995 |
| Nigel Challis Limited | Professional & scientific | 2022 |
| Nora Limited | Administrative & support | 2024 |
| Nutrapod Limited | Manufacturing | 2017 |
| O & H Catering Ltd | Hospitality | 2014 |
| OCC Project Services Ltd | Construction | 2026 |
| Ocho UK Limited | Hospitality | 2025 |
| OM Ganesh Forest Ltd | Hospitality | 2025 |
| On-Sites Limited | Construction | 2001 |
| Orangefield Technology Limited | Information & communication | 1984 |
| Padley Mills Ltd | Real estate | 2023 |
| PAG Group Ltd | Financial services | 2021 |
| Penncom Research Limited | Health & social care | 2012 |
| Petralee Consulting Limited | Information & communication | 2017 |