| Flightshows Ltd | London | 2020 |
| Flik Ultimate Ltd | Worcester | 2015 |
| Flinders Fitness Ltd | Manchester | 2026 |
| Fling Tube Ltd | Perth | 2025 |
| Flings & Things Limited | Glasgow | 2014 |
| Flint and FIR Ltd | Hunworth | 2024 |
| Flint Hall Bloodstock Ltd | Malton | 2019 |
| Flint Harris Ltd | Doncaster | 2025 |
| Flint Media Group Ltd | London | 2026 |
| Flint Plaza Limited | Basildon | 2022 |
| Flint Rugby Club Limited | Flint | 2026 |
| Flint Writes Limited | Stroud | 2015 |
| Flintlock Theatre | Amersham | 2019 |
| Flintoff Green Editorial Limited | London | 2008 |
| Flintshire Libraries and Leisure Limited | Deeside | 2024 |
| Flip Air Limited | Dewsbury | 2026 |
| Flip and Twist Gymnastics Community Interest Company | Stonehouse | 2013 |
| Flip Films Limited | London | 2017 |
| Flip Media Limited | London | 2015 |
| Flip OUT Ltd | Richmond Upon Thames | 2013 |
| Flip the Script Theatre Company Ltd | Manchester | 2023 |
| Flip ‘N’ FLY Bungee Fit Ltd | Brierley Hill | 2022 |
| Flipfit Ltd | London | 2021 |
| Flipper Music Publishing Ltd. | London | 2010 |
| Flipper's Roller Boogie Palace London Ltd | London | 2022 |
| Flippers & Fins Club Ltd | Hurstpierpoint | 2005 |
| Flipping OUT Gymnastics Ltd | Birmingham | 2022 |
| Flips Gymnastics Club Limited | St. Albans | 2016 |
| Flipside Theatre Productions Ltd | London | 2025 |
| Fliptunesmusic X Ltd | Braintree | 2018 |
| Flipz Gymnastics Club Limited | Ross On Wye | 2019 |
| Flirt Series Ltd | Telford | 2019 |
| Flitwick and Ampthill Lawn Tennis Club Limited(The) | Flitwick | 1956 |
| Flitwick Cricket Club Ltd | Bedford | 2023 |
| Flitwick Lodge Events Ltd | Bedford | 2022 |
| Flix Gymnastics Bedford Limited | Bedford | 2025 |
| Flixton Football Club Limited | Manchester | 2025 |
| FLO & FLO Limited | Chatham | 2025 |
| FLO Art Publishing Ltd | Minehead | 2023 |
| FLO Blue Limited | Colwyn Bay | 2025 |
| FLO Martial Arts Limited | Plymouth | 2016 |
| FLO Music Limited | London | 2022 |
| FLO Performing Arts Ltd | Downham Market | 2025 |
| FLO Pilates Limited | Middlesbrough | 2023 |
| FLO Productions Ltd | London | 2025 |
| FLO PUG Limited | Bromsgrove | 2017 |
| FLO Reformer Limited | Alfreton | 2025 |
| FLO Reformer Pilates Ltd | Southampton | 2026 |
| FLO Yoga Limited | London | 2018 |
| Float Along Festival Ltd | Stockport | 2023 |
| Float Network Ltd | Colchester | 2021 |
| Float Retreat Limited | Hertford Heath | 2020 |
| Float the Boat Ltd | Christchurch | 2010 |
| Float Training Academy Ltd | Brighton | 2019 |
| Float Zone Reading Ltd | Reading | 2023 |
| Floatation Perceptions Ltd | Dundee | 2014 |
| Floatation Therapy Essex Ltd | Royal Victoria Docks | 2020 |
| Floating Earth (Europe) Limited | London | 1990 |
| Floating Earth Editing Limited | London | 1991 |
| Floating Safari Limited | London | 2015 |
| Floating Shed Ltd | Axbridge | 2026 |
| Floatkinson Ltd | Exeter | 2025 |
| Flock Arts CIC | Shepton Mallet | 2026 |
| Flock Creative Limited | Sevenoaks | 2014 |
| Flock Entertainment Limited | Edinburgh | 2024 |
| Flock Fitness Limited | Hove | 2017 |
| Flock Music Limited | London | 2008 |
| Flock Theatre Makers Ltd | Brighton | 2022 |
| Floella Bird Ltd | Cambridge | 2019 |
| Floetree Limited | Balloch | 1986 |
| Flolileve Limited | London | 2014 |
| Flood the Floor Limited | London | 2013 |
| Floor 3 Events Ltd | Stafford | 2016 |
| Floor Barre Limited | Malvern | 1998 |
| Floorfillers Entertainment Ltd | Lincoln | 2023 |
| Floppy Bunny Ltd | Bourne End | 2014 |
| Floppy Fellas Ltd | Watford | 2024 |
| Flopug Music Limited | Bromsgrove | 2022 |
| Flor Yoga Ltd | London | 2022 |
| Flora & Sketch Limited | Leigh-On-Sea | 2023 |
| Flora Collective Ltd | London | 2023 |
| Flora Fairbairn & Co Limited | Banbury | 2021 |
| Flora Theatrical Productions Limited | Bridgnorth, | 2025 |
| Floraa Limited | Manchester | 2024 |
| Floral Affair London Ltd | Hayes | 2025 |
| Floral Couturier Group Ltd | London | 2019 |
| Floral Design Studio Infinity Ltd | London | 2015 |
| Floral Fundamentals Ltd | Stirling | 2014 |
| Floral Image Band Limited | Norwich | 2026 |
| Floralands Farm Park Limited | Nottingham | 2017 |
| Florence + the Machine Ltd | Southwark | 2007 |
| Florence Adkin Management Group Ltd | London | 2022 |
| Florence and Ottie Limited | Malvern | 2018 |
| Florence Black Band Ltd | Market Deeping | 2020 |
| Florence Footwear Limited | Leicester | 2016 |
| Florence Media Productions Ltd | Milton Keynes | 2019 |
| Florence Pictures Limited | London | 2021 |
| Florence Rose Productions Ltd | Stowmarket | 2021 |
| Florentia Flowers Limited | Gloucester | 2017 |
| Flori Canto Ltd | London | 2021 |