| Finkle Quarter Management Limited | Real estate | 2018 |
| Finley James Trading Limited | Professional & scientific | 2017 |
| Finvero Limited | Administrative & support | 2026 |
| FIR Properties Limited | Real estate | 2011 |
| FIR Trees Nursery School Limited | Education | 2012 |
| Fire Door Service Hull Ltd | Manufacturing | 2024 |
| Fire Dragon Antiques Ltd | Wholesale & retail | 2025 |
| Fire Risk Assessment App Ltd | Wholesale & retail | 2026 |
| Fireact Solutions Limited | Construction | 2023 |
| Firearms Advocacy Services Ltd | Professional & scientific | 2026 |
| Fireowl Games Limited | Information & communication | 2025 |
| Firewall Passive Fire Protection Ltd | Public administration | 2024 |
| First 4 Futsal CIC | Arts & recreation | 2021 |
| First Contact Solutions Limited | Health & social care | 2020 |
| First Deepee Solutions Ltd | Administrative & support | 2025 |
| First for Space Limited | Construction | 2018 |
| First Step Education & Training Limited | Education | 2012 |
| First Step Sports Limited | Arts & recreation | 2009 |
| First Touch 360 Ltd | Arts & recreation | 2021 |
| First Touch Football Club CIC | Arts & recreation | 2022 |
| Firth & Moss (Hull) Ltd | Financial services | 2021 |
| Fisadco Engineering Limited | Professional & scientific | 2014 |
| Fiscale Financial Services Limited | Financial services | 2007 |
| Fisher BSE Limited | Administrative & support | 2020 |
| Fisher Renovations and Rents Limited | Real estate | 2025 |
| Fisher Security Hull Limited | Administrative & support | 2015 |
| Fisher TEC Limited | Financial services | 2017 |
| Fishwick Instrumentation Services (FIS) Limited | Professional & scientific | 2025 |
| Fisk Printers Limited | Manufacturing | 2003 |
| Fisman Ltd | Health & social care | 2025 |
| Fit 'N' Tasty Ltd | Manufacturing | 2024 |
| FIT24 (Central) Limited | Arts & recreation | 2020 |
| FIT24 (Seaham) Limited | Arts & recreation | 2018 |
| FIT24 (West) Ltd | Arts & recreation | 2019 |
| Fitling (Holdings) Limited | Real estate | 2020 |
| Fitness Music Ltd | Administrative & support | 2014 |
| FITTING24 Ltd | Construction | 2024 |
| Fitumi Ltd | Wholesale & retail | 2022 |
| Five Leaf Clover Delivery Ltd | Transport & logistics | 2026 |
| Fivestar Hull Limited | Water & waste | 1991 |
| Fiveways Hull Limited | Hospitality | 2019 |
| FIX (Hull) Limited | Construction | 2021 |
| FIX P and H Limited | Construction | 2026 |
| FIX Property (Hull) Limited | Real estate | 2025 |
| Fixential Ltd | Construction | 2021 |
| Fizjotrener Kacper Ltd | Professional & scientific | 2025 |
| Flair GAS Plumbing and Heating Ltd | Construction | 2016 |
| Flamecrest Ltd | Construction | 2022 |
| Flash Transfers Ltd | Transport & logistics | 2023 |
| Flaunt Training Limited | Other services | 2026 |
| Flava World Foods Limited | Wholesale & retail | 2023 |
| Flavor EAT Food Limited | Hospitality | 2025 |
| Flavor House Limited | Wholesale & retail | 2023 |
| Flavour Haven 247 Limited | Hospitality | 2025 |
| Flavour-Tech UK Limited | Manufacturing | 2015 |
| Flawless Hair & Beauty (Hull) Ltd | Other services | 2023 |
| Fleetflow Technologies Ltd | Information & communication | 2024 |
| Fleetmate Limited | Transport & logistics | 2016 |
| Flemingate Beverley Holdings (NO.1) Limited | Professional & scientific | 2014 |
| Flemingate Beverley Holdings (NO.2) Limited | Professional & scientific | 2014 |
| Flemingate Beverley Topco Limited | Financial services | 2018 |
| Flemingate Holdings Limited | Professional & scientific | 2019 |
| Flemingate Subway Ltd | Hospitality | 2016 |
| Flex Health Clinical Ltd | Health & social care | 2023 |
| Flex Health Limited | Health & social care | 2016 |
| Flex Maintenance Services (Hull) Ltd | Construction | 2010 |
| Flex South Yorkshire Limited | Health & social care | 2024 |
| Flex Ventures (ENG) Limited | Financial services | 2022 |
| Flex Workspaces Ltd | Administrative & support | 2023 |
| Flexbridge Limited | Information & communication | 2023 |
| Flexi Van Hire Ltd | Administrative & support | 2020 |
| Flexi-Pets Limited | Extraterritorial | 2024 |
| Flextec Limited | Administrative & support | 2023 |
| Flintoft Protection Services Ltd | Financial services | 2018 |
| Flinton Group Ltd | Wholesale & retail | 2026 |
| Flinton Taxis Ltd | Transport & logistics | 2026 |
| Flinton Travel Ltd | Administrative & support | 2026 |
| Flols Global Services Limited | Wholesale & retail | 2025 |
| Flooring Depot (Hull) Limited | Transport & logistics | 2019 |
| Floortrak (Romsey) Limited | Construction | 2013 |
| Florence Lawrence Property Investments Limited | Real estate | 2025 |
| Florin S E Limited | Manufacturing | 2023 |
| Florin-Robert Ltd | Transport & logistics | 2023 |
| Floris Emilian Ltd | Health & social care | 2010 |
| Flour and Feast Ltd | Manufacturing | 2022 |
| Flow Collingwood Holdings Ltd | Professional & scientific | 2025 |
| Flowerfy Ltd | Manufacturing | 2025 |
| Flowers Investments Limited | Real estate | 2021 |
| Flowmarsters Ltd | Construction | 2025 |
| Flowstar (U.K.) Limited | Wholesale & retail | 1978 |
| Flowstar Limited | Professional & scientific | 2000 |
| Fluds Limited | Professional & scientific | 2009 |
| Fluffable Ltd | Manufacturing | 2026 |
| Fluffy Jumpers Ltd | Agriculture & fishing | 2026 |
| Fluid FOX Ltd | Wholesale & retail | 2018 |
| Fluidmediauk Ltd | Information & communication | 2023 |
| FLX Health Ltd | Information & communication | 2019 |
| Flyfleet Ltd | Transport & logistics | 2025 |
| Flying High Services Limited | Administrative & support | 2018 |
| Flynn Developments Limited | Construction | 2020 |