| Qmch Limited | Administrative & support | 2019 |
| Qmile Group Limited | Administrative & support | 2018 |
| Qmpf LLP | | 2012 |
| QMS (Edinburgh) Limited | Administrative & support | 2018 |
| Qontec Ltd | Professional & scientific | 2018 |
| Qovex Ltd | Wholesale & retail | 2025 |
| Qpmed Global Limited | Professional & scientific | 2014 |
| QR PCP Carry 1 LP | | 2024 |
| QR PCP Carry GP LLP | | 2024 |
| QR Property Ltd | Real estate | 2022 |
| QRF Services Ltd | Wholesale & retail | 2021 |
| QS (Scotland) LLP | | 2024 |
| QS Advisor Limited | Professional & scientific | 2012 |
| QS Holdings (Scotland) Limited | Financial services | 2024 |
| QS Properties (Scotland) Limited | Hospitality | 2024 |
| QT Coaching Ltd | Professional & scientific | 2023 |
| QT T/A Festival Store Ltd | Wholesale & retail | 2018 |
| Qtech Supplies LP | | 2014 |
| Quaco LP | | 2009 |
| Quadratic International LP | | 2017 |
| Quadrivium Projects Limited | Information & communication | 2013 |
| Quadro Alliance LP | | 2016 |
| Quadrom (AMR) Ltd | Manufacturing | 2024 |
| Quair Blinn Networks Ltd | Construction | 2026 |
| Quaker Industries L.P. | | 2011 |
| Qualifications for Industry Limited | Education | 2010 |
| Quality & Pharm LP | | 2014 |
| Quality Able LP | | 2017 |
| Quality Building Solutions Edinburgh Limited | Construction | 2019 |
| Quality Care (SC) Limited | Health & social care | 2017 |
| Quality Cleaning Services Edinburgh Ltd | Administrative & support | 2015 |
| Quality Cleaning Services Scotland Ltd | Administrative & support | 2018 |
| Quality Control Clothing Ltd | Wholesale & retail | 2025 |
| Quality Global Advisors L.P. | | 2012 |
| Quality Governance Collaborative Limited | Professional & scientific | 2026 |
| Quality Meat Scotland Limited | Agriculture & fishing | 2009 |
| Quality Office UK Limited | Other services | 2007 |
| Quality Patch Ltd | Wholesale & retail | 2021 |
| Quality Sure Limited | Administrative & support | 2010 |
| Quality Systems Ltd. | Professional & scientific | 2005 |
| Quality Trade Supplies L.P. | | 2012 |
| Quality Wholesale L.P. | | 2011 |
| Qualtern Limited | Information & communication | 2010 |
| Qualvaris Ltd | Professional & scientific | 2025 |
| Qualytour Ltd | Administrative & support | 2016 |
| Quang ANH 1 Ltd | Real estate | 2025 |
| Quant Ltd | Information & communication | 2019 |
| Quant Technologies Limited | Information & communication | 2015 |
| Quanta Dynamix Limited | Professional & scientific | 2024 |
| Quanta Shipping LP | | 2016 |
| Quantcode Technologies Ltd | Information & communication | 2025 |
| Quanted Ltd | Education | 2023 |
| Quantics Consulting Limited | Information & communication | 2002 |
| Quantinance Ltd | Information & communication | 2023 |
| Quantira Group Limited | Information & communication | 2026 |
| Quantisor, LP | | 2012 |
| Quantum Advise LP | | 2015 |
| Quantum Catnip Ltd | Information & communication | 2025 |
| Quantum Communications Group Limited | Professional & scientific | 2018 |
| Quantum Consultancy Group Limited | Administrative & support | 2019 |
| Quantum Cyber Security Training Limited | Information & communication | 2017 |
| Quantum Digital Technologies Limited | Wholesale & retail | 2025 |
| Quantum IT Digital Ltd | Information & communication | 2014 |
| Quantum Marine Ltd. | Professional & scientific | 2012 |
| Quantum Property Management Ltd | Real estate | 2024 |
| Quantum Technology Group LP | | 2016 |
| Quantum Trade LP | | 2016 |
| Quantumdeflect Systems Ltd | Extraterritorial | 2025 |
| Quarex Logistics Holdings LP | | 2018 |
| Quark TV Productions Ltd | Information & communication | 2017 |
| Quarry Advertising LP | | 2016 |
| Quarter Mile Serviced Apartments Ltd | Hospitality | 2020 |
| Quarter Myle Ltd | Wholesale & retail | 2018 |
| Quarter Zips Ltd | Wholesale & retail | 2026 |
| Quartermile Developments Limited | Construction | 2007 |
| Quartermile Estates Limited | Real estate | 2005 |
| Quartermile Ventures Limited | Construction | 2000 |
| Quarteron LP | | 2014 |
| Quartet Plus LP | | 2018 |
| Quartile Management Consulting Limited | Professional & scientific | 2002 |
| Quartile Software Limited | Information & communication | 2003 |
| Quas Drinks Ltd | Manufacturing | 2021 |
| Quate & Co Edinburgh Ltd | Other services | 2018 |
| Quaterline Communication LP | | 2016 |
| Quatreex LP | | 2014 |
| Quatrelle Logistics LP | | 2015 |
| Quatrolex Trading LP | | 2018 |
| Quatromark L.P. | | 2014 |
| Quattro Consult Limited | Professional & scientific | 2009 |
| Quattro Morrison Ltd | Real estate | 2019 |
| Quavah Homes Ltd | Construction | 2026 |
| Quay Estate Investments Ltd | Real estate | 2021 |
| Quay House Property Limited | Real estate | 2011 |
| Quayside Health Retreat Limited | Other services | 2026 |
| Qube Design & Construction Ltd | Construction | 2024 |
| Qube Systems Limited | Arts & recreation | 2025 |
| Qubit Health Ventures Founder LP | | 2021 |
| Qubit Ventures I Founder GP LLP | | 2024 |
| Qubit Ventures I Founder LP | | 2024 |
| Qubrik Limited | Information & communication | 2016 |