| Fastest Club Ltd | Extraterritorial | 2018 |
| FBJ Property Maintenance Limited | Construction | 2000 |
| FDC Lifestyles Limited | Real estate | 2020 |
| Fearless Inns Limited | Hospitality | 2009 |
| Featherbroom Gardens (Wickham Market) Management Company Limited | Real estate | 2025 |
| Felgate Management Company (Laxfield) Limited | Households | 2024 |
| Felgate Way Land Limited | Real estate | 2025 |
| Felix Cory-Wright Limited | Health & social care | 2018 |
| Fennridge Ltd | Transport & logistics | 2016 |
| Fergers Ltd | Professional & scientific | 2021 |
| FHM Forensic Accounting Limited | Professional & scientific | 2024 |
| Figa + Co Limited | Arts & recreation | 2006 |
| Filca Limited | Other services | 2022 |
| Fill Recruitment Limited | Administrative & support | 2003 |
| Financial Gaming Limited | Administrative & support | 2009 |
| Financial Impact Limited | Professional & scientific | 2004 |
| Finavon Hill Limited | Wholesale & retail | 2014 |
| Finders Keepers Club Ltd | Wholesale & retail | 2020 |
| Finish Line TV Ltd | Information & communication | 2021 |
| First Last Film Ltd | Information & communication | 2018 |
| First Yacht Administration Ltd | Extraterritorial | 2022 |
| Fission Films Ltd | Information & communication | 2023 |
| Five Steps Limited | Hospitality | 2024 |
| Fivecross Limited | Professional & scientific | 2004 |
| Flag of Suffolk Limited | Hospitality | 2015 |
| Flair Media & Video Ltd | Information & communication | 2019 |
| Fleming Bros Ltd | Hospitality | 2025 |
| Fleming Estates Ltd | Construction | 2019 |
| Fletcher Barton Ltd | Professional & scientific | 2012 |
| Flexible Psychological Solutions LLP | | 2013 |
| Florence & Joy Ltd | Wholesale & retail | 2022 |
| Flunder Wines Limited | Wholesale & retail | 2020 |
| Flybird Installations Limited | Manufacturing | 2007 |
| Flying Fish Coaching and Consulting Limited | Professional & scientific | 2009 |
| Fodderuk Ltd | Wholesale & retail | 2021 |
| Fonnereau Leisure Limited | Real estate | 2013 |
| Foreshore Limited | Professional & scientific | 2010 |
| Forest Court Management Limited | Real estate | 2005 |
| Forester Business Consulting Limited | Information & communication | 2003 |
| Fork East Ltd | Manufacturing | 2017 |
| Form-Al Group Ltd | Wholesale & retail | 2015 |
| Four Mountains Limited | Professional & scientific | 2017 |
| Fram Broadband Limited | Information & communication | 2003 |
| Fram Computer Services Ltd | Other services | 2023 |
| Fram D.I.Y. & Building Supplies Limited | Wholesale & retail | 1977 |
| Fram Energy Limited | Professional & scientific | 1975 |
| Fram Farm Vets Limited | Professional & scientific | 2025 |
| Fram Farmers Insurance Services Limited | Financial services | 2015 |
| Framfridge CIC | Hospitality | 2025 |
| Framlingham Agronomy Limited | Professional & scientific | 1985 |
| Framlingham Car Wash Ltd | Wholesale & retail | 2023 |
| Framlingham College Enterprises Limited | Hospitality | 1989 |
| Framlingham Concerts Community Interest Company | Information & communication | 2025 |
| Framlingham Hall Farms Limited | Agriculture & fishing | 2022 |
| Framlingham Taxi Service Ltd. | Transport & logistics | 2003 |
| Framlingham Technology Centre Limited | Real estate | 1998 |
| Framtrade Limited | Wholesale & retail | 1986 |
| Franchisecounsel Limited | Information & communication | 2015 |
| Frawd Ltd | Information & communication | 2025 |
| Fred HTC & Services Ltd | Wholesale & retail | 2023 |
| Freedom Pharma Consulting Limited | Professional & scientific | 2026 |
| Freeway Car Hire Limited | Administrative & support | 2000 |
| Freewheel Suffolk CIC | Education | 2025 |
| Freight - Logic Limited | Transport & logistics | 2003 |
| French Maison Ltd | Administrative & support | 2017 |
| Fresh Start Removals Ltd | Transport & logistics | 2008 |
| Fressingfield Land LLP | | 2007 |
| Friars Consulting Ltd | Professional & scientific | 2015 |
| Friday Street Barns Limited | Households | 2017 |
| Friends of ST Mary's Church Limited | Other services | 2014 |
| Frontform Property Management Limited | Real estate | 1986 |
| Frost-Air Limited | Manufacturing | 2008 |
| Fruity Brains Limited | Professional & scientific | 2019 |
| Fullers Electronic Services Limited | Manufacturing | 2002 |
| Fullers Field Management Company Limited | Real estate | 2016 |
| FUTURE3 Ltd | Professional & scientific | 2020 |
| Fwrmedia Ltd | Information & communication | 2026 |
| G & K Estates Limited | Real estate | 2010 |
| G B Cleaning Limited | Administrative & support | 2024 |
| G C Paraesthetics Ltd | Health & social care | 2025 |
| G M Advisory Services Limited | Administrative & support | 2014 |
| G W Sykes Limited | Construction | 2002 |
| G.B. Films Limited | Information & communication | 2000 |
| G.M.B. and W.E.B. Finance Limited | Extraterritorial | 2019 |
| G.M.B. Nominees Limited | Extraterritorial | 2019 |
| G.P. Marsland Limited | Real estate | 2016 |
| G.W. Smith (Alderton) Limited | Construction | 1964 |
| Gablok Holdings Ltd | Wholesale & retail | 2025 |
| Galatea Analysis Limited | Professional & scientific | 2025 |
| Gale Properties Limited | Real estate | 2020 |
| Gamedev.Tv Ltd | Education | 2020 |
| Gamston Ltd | Financial services | 2025 |
| Garden Cafe (EA) Ltd | Hospitality | 2025 |
| Garnetts Gardens Limited | Wholesale & retail | 2011 |
| Garrards Court (Framlingham) Management Company Limited | Real estate | 1985 |
| Garrett Close Limited | Households | 2018 |
| Gartre Limited | Hospitality | 2019 |
| Gatsby Music Limited | Information & communication | 2025 |
| GB Cleaning Solutions Limited | Administrative & support | 2013 |
| GB Project Services Limited | Construction | 2024 |