| Felixstowe Area Community Transport Limited | Transport & logistics | 2003 |
| Felixstowe Auto Centre Limited | Wholesale & retail | 2015 |
| Felixstowe Beach Walkers FC Ltd | Extraterritorial | 2022 |
| Felixstowe BID Ltd | Other services | 2021 |
| Felixstowe Blinds & Awnings Ltd | Construction | 2021 |
| Felixstowe Book Festival | Arts & recreation | 2016 |
| Felixstowe CAB Co Limited | Transport & logistics | 2007 |
| Felixstowe Car Centre Limited | Extraterritorial | 2010 |
| Felixstowe Carpentry and Joinery Ltd | Construction | 2025 |
| Felixstowe Cars Limited | Professional & scientific | 2023 |
| Felixstowe Clutch Centre Ltd | Wholesale & retail | 2026 |
| Felixstowe Communities Alliance CIC | Other services | 2025 |
| Felixstowe Containers Limited | Extraterritorial | 2020 |
| Felixstowe Curry House Ltd | Hospitality | 2013 |
| Felixstowe Ferry Boat Yard Limited | Manufacturing | 1965 |
| Felixstowe Ferry Golf Club Limited | Arts & recreation | 2011 |
| Felixstowe Guitar Conservatoire Ltd | Arts & recreation | 2025 |
| Felixstowe Homes Limited | Professional & scientific | 2023 |
| Felixstowe House Clearance Ltd | Transport & logistics | 2023 |
| Felixstowe International E-Wha Limited | Education | 1995 |
| Felixstowe Limited | Extraterritorial | 2010 |
| Felixstowe Marine Limited | Manufacturing | 2010 |
| Felixstowe Medical LLP | | 2012 |
| Felixstowe MOT Centre Limited | Wholesale & retail | 2026 |
| Felixstowe Nails Spa Ltd | Other services | 2026 |
| Felixstowe Physiotherapy Limited | Health & social care | 2011 |
| Felixstowe Port Container Services Limited | Transport & logistics | 1995 |
| Felixstowe Radio Community Interest Company | Information & communication | 2007 |
| Felixstowe Rugby Union Football Club Limited | Arts & recreation | 2011 |
| Felixstowe Self Storage Limited | Real estate | 2014 |
| Felixstowe Shipping Containers Limited | Extraterritorial | 2020 |
| Felixstowe Shipping Limited | Transport & logistics | 2010 |
| Felixstowe Transport Limited | Transport & logistics | 2020 |
| Felixstowe Truck and Plant Ltd | Wholesale & retail | 2020 |
| Felixstowe Truckstop Limited | Transport & logistics | 2024 |
| Felixstowe Tyre & Alignment Centre Ltd | Wholesale & retail | 2026 |
| Felixstowe Tyres Limited | Wholesale & retail | 2026 |
| Felixstowe Youth Development Group | Professional & scientific | 2000 |
| Ferry Boatyard Marine Services Ltd | Manufacturing | 2011 |
| FF Customs & Logistics Ltd | Transport & logistics | 2019 |
| Ffgc Balfour Place Limited | Construction | 2024 |
| Fikama Ltd | Transport & logistics | 2019 |
| Filby Construction (Suffolk) Ltd | Construction | 2025 |
| Fillrate Ltd | Information & communication | 2026 |
| Firmin's Garage Limited | Wholesale & retail | 2015 |
| Fish and Chips Dish Ltd | Hospitality | 2022 |
| Fitjo Sports Limited | Wholesale & retail | 2012 |
| Flatform Shoes and Sandals Limited | Extraterritorial | 2017 |
| Flatform Shoes Limited | Extraterritorial | 2017 |
| Flex Property Services Limited | Households | 2025 |
| Flexitrans Limited | Transport & logistics | 2003 |
| Florin Tranport Limited | Transport & logistics | 2023 |
| Flowe Media Ltd | Information & communication | 2001 |
| FLR Transport Ltd | Transport & logistics | 2023 |
| Flyer Press Limited | Manufacturing | 2005 |
| FOR-US14 Ltd | Transport & logistics | 2022 |
| Force Soliution Ltd | Wholesale & retail | 2024 |
| Forest & Shore Ltd | Administrative & support | 2016 |
| Forever Sculpture Ltd | Manufacturing | 2024 |
| Four BROTHERS123 Limited | Wholesale & retail | 2025 |
| Four Three Pizza Ltd | Hospitality | 2020 |
| Four Winds Property Maintenance Ltd | Construction | 2017 |
| Free Flow Guttering Solutions Ltd | Construction | 2016 |
| Freeflow Engineering Ltd | Manufacturing | 2001 |
| Freight (UK) Limited | Transport & logistics | 1988 |
| Freight Branch International Ltd | Transport & logistics | 2025 |
| Freight Transit Solutions Ltd | Transport & logistics | 2020 |
| Fruit & Flowers Limited | Wholesale & retail | 2014 |
| Fruta MIA Ltd | Wholesale & retail | 2025 |
| Full Stop Bowl Limited | Manufacturing | 2006 |
| Furtherfield.Org | Information & communication | 2009 |
| FXT Fibre Optics Limited | Professional & scientific | 2012 |
| G & S Fast Food (UK) Limited | Hospitality | 2024 |
| Gabryel Logistic Ltd | Transport & logistics | 2017 |
| Gantsign Ltd | Information & communication | 2007 |
| Gareth J Davies Transport Ltd | Administrative & support | 2012 |
| Gaston Schul Customs Ltd | Administrative & support | 2001 |
| GB Tech Tronic Limited | Wholesale & retail | 2024 |
| GBH (Felixstowe) Limited | Construction | 1999 |
| Gelosia Ltd | Information & communication | 2014 |
| General Trade Group Ltd | Wholesale & retail | 2015 |
| Gentlemen's Felixstowe Limited | Other services | 2017 |
| George Baker (Air & Sea) Limited | Transport & logistics | 2014 |
| George Baker (Europe) Limited | Transport & logistics | 2015 |
| George Baker (Logistics) Limited | Transport & logistics | 2015 |
| George Baker (Shipping) Limited | Transport & logistics | 1982 |
| George Baker (Transport) Limited | Transport & logistics | 2010 |
| George Baker Group Limited | Financial services | 2012 |
| GF Trans Ltd | Transport & logistics | 2016 |
| Gillor Limited | Hospitality | 2024 |
| Ginkgo Tree Surgery Limited | Agriculture & fishing | 2012 |
| GK Haulage Solutions Limited | Transport & logistics | 2025 |
| Glenfield Technical Consultancy Ltd | Professional & scientific | 2023 |
| Gllew Limited | Wholesale & retail | 2022 |
| Global Container Services Limited | Transport & logistics | 1983 |
| Global Recruitment International Ltd | Transport & logistics | 2023 |
| Glow - the Beauty Specialists Ltd | Other services | 2017 |
| GLU Driver Limited | Transport & logistics | 2023 |
| Go Mobile in Minutes Limited | Information & communication | 2012 |
| Golden of Olden Ltd | Agriculture & fishing | 2025 |