| Forliana Alliance LP | | 2013 |
| Forlink Credit L.P. | | 2016 |
| Forlink Worldwide L.P. | | 2014 |
| Form Edge Joinery Ltd | Construction | 2026 |
| Form Structural Engineers Ltd | Professional & scientific | 2019 |
| Forma Skin & Laser Clinic Ltd | Other services | 2024 |
| Formal Soil LP | | 2013 |
| Formation Evaluation Technologies Limited | Other services | 2016 |
| Formation Support LP | | 2015 |
| Formative Networks Associates | | 1992 |
| Formel Industries LP | | 2016 |
| Forment Centurion LP | | 2011 |
| Formex Hire and Sales Limited | Wholesale & retail | 2024 |
| Formfeelingfunction Ltd | Information & communication | 2015 |
| Formimpex L.P. | | 2016 |
| Formivanta Visual Logic Ltd | Information & communication | 2026 |
| Formlux Capital L.P. | | 2016 |
| Formosa Capital LP | | 2018 |
| Formosa Delight Limited | Wholesale & retail | 2021 |
| Formost Promotions L.P. | | 2011 |
| Forpetmenot Ltd | Arts & recreation | 2024 |
| Forpus Trading LP | | 2016 |
| Forres Investment Trading (Scotland) Partnership SP | | 2022 |
| Forres Street Developments LLP | | 2021 |
| Forrest Ground Work/Construction Limited | Construction | 2023 |
| Forrest Property Developments Limited | Households | 2026 |
| Forrest Road Foods Ltd | Hospitality | 2025 |
| Forrester Associates LP | | 2014 |
| Forrit Holdings Limited | Information & communication | 2017 |
| Forrit LP | | 2017 |
| Fors Verden LP | | 2016 |
| Forsa Management LP | | 2018 |
| Forsant Investment Trading (Scotland) Partnership SP | | 2022 |
| Forshall Developments Limited | Construction | 2026 |
| Forshaw Gauld Engineers Ltd | Professional & scientific | 2021 |
| Forside Resources LP | | 2014 |
| Forsinard Estate Limited | Hospitality | 2022 |
| Forson IT Consultancy Ltd | Information & communication | 2020 |
| Forsor Ltd | Professional & scientific | 2023 |
| Forsor Property Ltd | Real estate | 2023 |
| Forster Business LP | | 2015 |
| Fort ELM LP | | 2011 |
| Fort Prestige LP | | 2013 |
| Fort Works Ltd | Professional & scientific | 2026 |
| Fort-Invest LP | | 2017 |
| Fortal SP | | 2003 |
| Fortaleza SP | | 2001 |
| Fortam LP | | 2012 |
| Fortan Group Ltd | Real estate | 2026 |
| FORTAN17 Ltd | Construction | 2025 |
| Fortanach Ltd | Professional & scientific | 2023 |
| Fortech Associates LP | | 2015 |
| Forterium Ltd | Wholesale & retail | 2026 |
| Fortescue UK IP Limited | Energy | 2023 |
| Fortex Construction LP | | 2011 |
| Fortex Opportunities LP | | 2014 |
| Fortex Resources LP | | 2016 |
| Fortexant LP | | 2017 |
| Fortgoa Investments LP | | 2013 |
| Forth & TAY Property Company Limited | Extraterritorial | 1964 |
| Forth Accounting Limited | Professional & scientific | 2019 |
| Forth and Clyde Media Ltd | Information & communication | 2020 |
| Forth and Oak Ltd | Financial services | 2026 |
| Forth Books Limited | Information & communication | 2012 |
| Forth Bridge Associates Ltd | Professional & scientific | 2018 |
| Forth Bridge Capital LLP | | 2016 |
| Forth Capital Group Limited | Financial services | 2021 |
| Forth Capital Limited | Real estate | 1995 |
| Forth City Ltd | Other services | 2003 |
| Forth Consultants Limited | Professional & scientific | 2024 |
| Forth Corinthian Developments Limited | Arts & recreation | 2015 |
| Forth Dimension Filmworks Ltd | Information & communication | 2019 |
| Forth Directive Solutions Ltd | Professional & scientific | 2020 |
| Forth Energy (Pipelines) Limited | Professional & scientific | 2008 |
| Forth Energy (Services) Limited | Professional & scientific | 2008 |
| Forth Engineering Services Limited | Wholesale & retail | 1994 |
| Forth Entertainment Ltd | Arts & recreation | 2021 |
| Forth Estuary Forum | Other services | 1997 |
| Forth Fire Protection Ltd | Professional & scientific | 2009 |
| Forth Flooring Limited | Professional & scientific | 2024 |
| Forth Furnishings Limited | Construction | 1972 |
| Forth Green Freeport Ltd | Administrative & support | 2024 |
| Forth Green Freeport Operating Ltd | Administrative & support | 2024 |
| Forth Investments Limited | Real estate | 2022 |
| Forth Lawn Care Limited | Administrative & support | 2024 |
| Forth Mast Services LP | | 2015 |
| Forth Movers Limited | Transport & logistics | 2009 |
| Forth Music Therapy Service Ltd | Health & social care | 2016 |
| Forth Petcare Ltd | Professional & scientific | 2023 |
| Forth Physio Ltd | Other services | 2026 |
| Forth Pilots Ltd | Transport & logistics | 2021 |
| Forth Pixel Creative Ltd | Information & communication | 2024 |
| Forth Pressure Clean Limited | Administrative & support | 2020 |
| Forth Property Ltd | Real estate | 2012 |
| Forth Property Management Limited | Real estate | 2019 |
| Forth Propery Services Limited | Hospitality | 2026 |
| Forth Pubs Ltd | Real estate | 2020 |
| Forth Rivers Consulting Limited | Agriculture & fishing | 2021 |
| Forth Rivers Trust | Agriculture & fishing | 2008 |
| Forth School of Music Ltd | Education | 2022 |