| Field and Fawcett Wine Merchants and Delicatessen Limited | Wholesale & retail | 2005 |
| Field and Fireside Limited | Wholesale & retail | 2021 |
| Field Archaeology Specialists Limited | Professional & scientific | 1993 |
| Field Flight Ltd | Professional & scientific | 2023 |
| Field to Fork Game Ltd | Agriculture & fishing | 2017 |
| Field View Equestrian C.I.C. | Education | 2023 |
| Fields Farm Eggs Limited | Manufacturing | 2014 |
| Fields, Farmyards and Families Ltd | Wholesale & retail | 2021 |
| Fierce Gymnastics Limited | Arts & recreation | 2020 |
| Fife Property Partnership Ltd | Real estate | 2026 |
| FIFTY20 Ltd | Wholesale & retail | 2025 |
| Fika Aesthetics Chesterfield Ltd | Other services | 2024 |
| Fika Aesthetics Derby Limited | Other services | 2024 |
| Filemot Technology Law Limited | Information & communication | 2000 |
| Filey Bay Cafe Limited | Hospitality | 2011 |
| Filey Bay Ice Cream Limited | Hospitality | 2020 |
| Filey Fields Development Limited | Construction | 2021 |
| Filey Flitwick Limited | Professional & scientific | 2015 |
| Filey Terrace Management Company (York) Limited | Households | 1990 |
| Fill Limited | Wholesale & retail | 2024 |
| Fillanthropic Consulting Limited | Professional & scientific | 2019 |
| Films by Oliver Reeve Limited | Professional & scientific | 2024 |
| Finance IT Angels Ltd | Financial services | 2017 |
| Financial Fiona Ltd | Financial services | 2014 |
| Finbow.P.S Ltd | Real estate | 2021 |
| Find a Local Ltd | Information & communication | 2025 |
| Find Great Schools Limited | Education | 2026 |
| Fine Art Training Services Ltd | Education | 2018 |
| Fineacre Landscaping Limited | Other services | 2021 |
| Finescalebrass (UK) Limited | Wholesale & retail | 2009 |
| Fining Associates Limited | Professional & scientific | 2006 |
| Finmax Limited | Administrative & support | 1997 |
| Finnegan TÍR Developments Ltd | Real estate | 2026 |
| Fintam Limited | Professional & scientific | 2018 |
| Fintech Content Marketing Ltd | Professional & scientific | 2023 |
| Finyx Consulting Limited | Professional & scientific | 2012 |
| Fiona Macey Consultancy Limited | Professional & scientific | 2016 |
| FIR Tree Farm (Yorkshire) Limited | Agriculture & fishing | 2015 |
| FIR Trees (York) Freehold Limited | Households | 2017 |
| FIR Trees (York) Management Limited | Households | 1971 |
| Firdalia Studios Ltd | Professional & scientific | 2026 |
| Fire and Forte Ltd | Professional & scientific | 2025 |
| Fire Door Services Franchise Ltd | Construction | 2016 |
| Firebird Drinks Limited | Manufacturing | 2026 |
| Firebox.Com Holdings Limited | Wholesale & retail | 2000 |
| Firecrest Digital Ltd | Information & communication | 2023 |
| Firewater Agri UK Limited | Wholesale & retail | 2026 |
| Firmamentum Consulting Ltd | Information & communication | 2024 |
| First Ace Consultancy Limited | Professional & scientific | 2019 |
| First Choice Worldwide Ltd | Wholesale & retail | 2006 |
| First FIX Industrial Limited | Wholesale & retail | 2018 |
| First FIX Industrial Supplies Ltd. | Wholesale & retail | 1998 |
| First Nova Capital Limited | Professional & scientific | 2016 |
| First Sovereign Projects Limited | Financial services | 2020 |
| First Steps Letting Limited | Real estate | 2015 |
| First Stop Safety Ltd | Extraterritorial | 2002 |
| First Swiss Depository Ltd | Construction | 2020 |
| Firth Exhold Limited | Extraterritorial | 2026 |
| Fish and Forest Ltd. | Hospitality | 2018 |
| Fish EYE Productions Limited | Other services | 1995 |
| Fisher & Company Limited | Professional & scientific | 2003 |
| Fisher Homes & Investments Ltd | Real estate | 2024 |
| Fishergate Court (York) Management Company Limited | Households | 2001 |
| Fishergate House Management Company Limited | Households | 2001 |
| Fishergate Management Company Limited | Households | 1986 |
| Fishergate Pizza Ltd | Hospitality | 2023 |
| Fishergate Pizza Y Limited | Hospitality | 2026 |
| Fishinu Ltd | Health & social care | 2019 |
| Fishpool Hill Bristol Management Company Limited | Households | 2023 |
| Fit 2 Learn C.I.C. | Education | 2012 |
| Fitch City Stays Ltd | Real estate | 2026 |
| Fitq Limited | Arts & recreation | 2023 |
| FIX and Tidy Limited | Administrative & support | 2024 |
| Fixers Pro Limited | Construction | 2017 |
| FJ Arundell Limited | Real estate | 2016 |
| Fjord Homes Ltd | Real estate | 2021 |
| FLA Developments Limited | Construction | 2021 |
| Flags.Uk.Com (AD Flags ) Ltd | Wholesale & retail | 2012 |
| Flagship Framing Limited | Wholesale & retail | 2014 |
| Flame Creative Studios Ltd | Information & communication | 2025 |
| Flame Developments LLP | | 2021 |
| Flame ‘N’ Dough Ltd | Hospitality | 2025 |
| Flamery Limited | Manufacturing | 2024 |
| Flanagan James Ltd | Real estate | 2012 |
| Flatford Limited | Manufacturing | 1972 |
| Flatley’S Fizzy’S Ltd | Wholesale & retail | 2025 |
| Flatout Moto & Cycle Worx Ltd | Wholesale & retail | 2025 |
| Flavor Isle Limited | Professional & scientific | 2025 |
| Flavours of India (Broughbridge) Ltd | Hospitality | 2025 |
| Flawith Management Company Limited | Households | 2018 |
| Flaxmoor Designs Ltd | Professional & scientific | 2023 |
| Flaxton Finance Limited | Financial services | 1985 |
| Flaxton Meadows Development Ltd | Hospitality | 2017 |
| Flaxton Self Drive Limited | Transport & logistics | 1989 |
| Flaxtrade Ltd | Wholesale & retail | 2016 |
| Fleckney Road Management Company Limited | Households | 2019 |
| Fleecemoor Ltd | Administrative & support | 2013 |
| Fleetbank Farms Limited | Agriculture & fishing | 1963 |
| Fleeting Arts C.I.C. | Real estate | 2024 |
| Fleetways Taxis (York) Limited | Transport & logistics | 1963 |