| Firstlink Corporation L.P. | | 2010 |
| Firstmax United L.P. | | 2011 |
| Firstminute Capital I General Partner LLP | | 2016 |
| Firstminute Capital I Holdings LP | | 2017 |
| Firstminute Capital II Carry LP | | 2020 |
| Firstminute Capital II General Partner LLP | | 2020 |
| Firstminute Capital III Carry LP | | 2022 |
| Firstminute Capital III General Partner LLP | | 2022 |
| Firstminute Capital IV Carry LP | | 2025 |
| Firstminute Capital IV Holdco 2 Ltd | Financial services | 2025 |
| Firstminute SPV Carry LP | | 2021 |
| Firstminute SPV GP LLP | | 2021 |
| Firstop Technology LP | | 2014 |
| Firststage Studios Ltd | Real estate | 2019 |
| Firsttrans Global LP | | 2014 |
| Firstway Holding LP | | 2016 |
| Firth of Forth Clinical Limited | Health & social care | 2017 |
| Firthport Management Limited | Hospitality | 2015 |
| Firts Business Corporation LP | | 2016 |
| Firtwork Impex LP | | 2015 |
| Fischy Limited | Education | 2007 |
| Fish Merchants Credit Management Limited | Financial services | 1996 |
| Fishburn Solar Limited | Energy | 2021 |
| Fishel Ltd | Professional & scientific | 2017 |
| Fisher Impex LP | | 2013 |
| Fisher Statistics Consultancy Limited | Wholesale & retail | 2010 |
| Fisheries Management Scotland | Agriculture & fishing | 2018 |
| Fisherman Chippy Ltd | Hospitality | 2024 |
| Fishers in the City Limited | Hospitality | 2000 |
| Fishing Around Ltd | Information & communication | 2026 |
| Fishing Around the UK CIC | Arts & recreation | 2026 |
| Fishing Management Services L.P. | | 2014 |
| Fishing Scotland Limited | Arts & recreation | 1999 |
| Fishkeeper Scotland Limited | Agriculture & fishing | 2015 |
| Fishtail Ventures Ltd | Professional & scientific | 2025 |
| Fishwise Limited | Professional & scientific | 2018 |
| Fisk Designs Limited | Extraterritorial | 2017 |
| Fissvord Services LP | | 2015 |
| Fit and Happy Limited | Arts & recreation | 2018 |
| Fit Space Ltd | Arts & recreation | 2018 |
| Fit Worldwide LP | | 2016 |
| Fit-Match Ltd | Information & communication | 2025 |
| Fit-Ness Sportwear Limited | Wholesale & retail | 2022 |
| Fitabeo Therapeutics Limited | Manufacturing | 2022 |
| Fiten Continental LP | | 2013 |
| Fithandel (Scotland) Limited | Professional & scientific | 1978 |
| Fitness Bricks Limited | Arts & recreation | 2018 |
| Fitness in Minutes Ltd | Health & social care | 2018 |
| Fitness International | | 1996 |
| Fitness NOW Ltd | Arts & recreation | 2022 |
| Fitness Soul Limited | Arts & recreation | 2014 |
| Fitness Street Ltd | Arts & recreation | 2019 |
| Fitnos Limited | Information & communication | 2026 |
| Fitzgeralds UK Collectors and Budget 45S Ltd | Wholesale & retail | 2024 |
| Fitzgeralds Vintage Emporium Ltd | Wholesale & retail | 2023 |
| Fitzpatrick Physio Ltd | Health & social care | 2023 |
| Fitzwilliam Advisors LP | | 2015 |
| Five Arrows Co-Investments Feeder III L.P. | | 2009 |
| Five Arrows Credit Solutions Co-Investments, L.P. | | 2014 |
| Five Diamonds LP | | 2003 |
| Five Dragon Company Limited | Wholesale & retail | 2017 |
| Five One Recruitment Limited | Administrative & support | 2015 |
| Five Peaks Coffee Ltd | Wholesale & retail | 2025 |
| Five Sevens Holding LP | | 2019 |
| Five Square Imagery Limited | Information & communication | 2011 |
| Five Star Consulting LP | | 2011 |
| Five Star Felines Ltd | Other services | 2023 |
| Five Star Management L.P. | | 2011 |
| Five Star Professional Services L.P. | | 2012 |
| Five Star TA Ltd | Hospitality | 2019 |
| Five Stars Industries L.P. | | 2011 |
| Five Steps Group LP | | 2020 |
| Five Walls Limited | Administrative & support | 2024 |
| Five Winters Ltd | Professional & scientific | 2022 |
| Fivedials Limited | Professional & scientific | 2026 |
| Fivepenny Property Company Ltd. | Real estate | 2013 |
| Fivesuns (Scot) LP | | 2019 |
| FIX and Keep Consulting LP | | 2017 |
| FIX Business LP | | 2015 |
| Fixable Ltd | Construction | 2015 |
| Fixco Property Services Ltd | Construction | 2026 |
| Fixers Edinburgh Ltd | Construction | 2024 |
| Fixfoxfilms Ltd | Information & communication | 2022 |
| Fixfur Trading LP | | 2016 |
| Fixit Technical Services Ltd | Other services | 2025 |
| Fixt Edinburgh Ltd | Construction | 2022 |
| Fixtec Consulting LP | | 2016 |
| Fixtech Group LP | | 2016 |
| Fixzy Limited | Professional & scientific | 2016 |
| Fizaan Motors Limited Partnership | | 2012 |
| Fjas Investment L.P. | | 2012 |
| Fjcc Ltd | Information & communication | 2015 |
| Fjell AI Ltd | Information & communication | 2025 |
| Fjmb Investments Limited | Real estate | 2023 |
| Fjord Adventures Limited | Other services | 2011 |
| Fjsu Limited | Hospitality | 2017 |
| FJW Trading Limited | Hospitality | 2015 |
| FK100 Limited | Construction | 2026 |
| FKA Property Ltd | Real estate | 2017 |
| Fkdj Ltd | Information & communication | 2023 |