| Stronelairg Wind Farm Limited | Energy | 2018 |
| Strongcom Ltd | Professional & scientific | 2024 |
| Stuart Lindsay Equine Dentistry Ltd | Health & social care | 2025 |
| Stuart Mcarthur Electrical Services Ltd | Construction | 2023 |
| Stuart Younger Electrical Ltd | Administrative & support | 2014 |
| Studio 24/7 Ltd | Arts & recreation | 2025 |
| Studio East Architects Ltd | Professional & scientific | 2015 |
| Succession Investment Group Limited | Financial services | 2023 |
| Succession Solutions Limited | Professional & scientific | 2024 |
| Sumon Ltd | Hospitality | 2020 |
| Sunhill Investments Limited | Professional & scientific | 1994 |
| Sunmax Elec Ltd | Construction | 2024 |
| Sunny Homes Scot Ltd | Real estate | 2025 |
| Supermove Limited | Real estate | 2018 |
| Suporn Limited | Health & social care | 2025 |
| Supple Limited | Information & communication | 2003 |
| Supportico Ltd | Hospitality | 2010 |
| Surgical Teams Ltd | Health & social care | 2022 |
| Sustain Energy Ventures Limited | Professional & scientific | 2015 |
| Suthers Stonemasonry Limited | Construction | 2024 |
| SVS 58 Ltd | Hospitality | 2024 |
| Swarnaspice Ltd | Hospitality | 2018 |
| Sweeney Electrics Ltd | Construction | 2023 |
| Sweeping Betty Holiday Lets and Commercial Cleaning Company Ltd | Other services | 2014 |
| Sweeping Betty Limited | Other services | 2013 |
| Sword Forestry Ltd | Agriculture & fishing | 2016 |
| Swordfish Direct Ltd | Wholesale & retail | 2023 |
| Symon Grid Ltd | Professional & scientific | 2026 |
| Synergy Salon Supplies Limited | Administrative & support | 2002 |
| System Integrity Limited | Information & communication | 2003 |
| T & K Landscaping & Groundswork Ltd | Administrative & support | 2025 |
| T & L Smith | Administrative & support | 1985 |
| T J W Stobbs Limited | Real estate | 1986 |
| T Paterson Jewellers Limited | Wholesale & retail | 2013 |
| T&C Contracts Ltd | Manufacturing | 2025 |
| T&T Garage Ltd | Wholesale & retail | 2021 |
| T'Go Creative Limited | Professional & scientific | 2014 |
| T.D. Productions Ltd. | Information & communication | 2007 |
| T.R.A.S.H.E.R. Limited | Manufacturing | 1989 |
| Tabla Foods Ltd | Hospitality | 2017 |
| Table Tennis Scotland | Arts & recreation | 2004 |
| Tabourel Perth Limited | Hospitality | 2017 |
| TAJ Investment Holdings Ltd | Real estate | 2026 |
| TAJ Retail Ltd | Wholesale & retail | 2024 |
| Tajs Grocer Ltd | Wholesale & retail | 2020 |
| Talent Optimisation Limited | Administrative & support | 2026 |
| Tanning Supermarket Ltd | Wholesale & retail | 2017 |
| Tanyarodriguez Ltd | Real estate | 2025 |
| Tara Taxi UK Ltd. | Transport & logistics | 2026 |
| Tarbert Garage Limited (the) | Extraterritorial | 1968 |
| Tariguard Security Ltd | Financial services | 2022 |
| Tarroul Subsea Ltd | Professional & scientific | 2021 |
| Tartan Thistle Property Ltd | Financial services | 2021 |
| Tartanology Ltd | Manufacturing | 2024 |
| Tartanstar Catering Ltd | Hospitality | 2022 |
| Tasker Trading Ltd | Administrative & support | 2020 |
| Taste of Alcohol Ltd | Wholesale & retail | 2017 |
| Taste of Europe 4 YOU Ltd | Wholesale & retail | 2015 |
| Taste of Poland Limited | Wholesale & retail | 2012 |
| Tat-Or-Too Tattoo and Beauty Limited | Other services | 2021 |
| TAY Apartments Limited | Hospitality | 2017 |
| TAY Development (Perthshire) Ltd | Construction | 2021 |
| TAY Farms Limited | Agriculture & fishing | 2005 |
| TAY Medispa Limited | Administrative & support | 2016 |
| TAY Network Insights Ltd | Information & communication | 2026 |
| TAY Property Services Limited | Construction | 2010 |
| TAY Rivers Trust Ltd. | Agriculture & fishing | 2004 |
| TAY Safety Ltd | Professional & scientific | 2011 |
| TAY Toilets & Tanks Ltd | Water & waste | 2024 |
| TAY Valley Fruits Limited | Wholesale & retail | 2010 |
| Tayar Ltd | Real estate | 2021 |
| Taycars Limited | Extraterritorial | 2012 |
| Tayclean Limited | Administrative & support | 2018 |
| Taygrow Limited | Wholesale & retail | 2017 |
| Taylet Ltd | Real estate | 2024 |
| Taylor Culdeesland Farmers | | 1987 |
| Taylor Mechanical Services Ltd | Construction | 2026 |
| Taylormechanics Ltd | Mining & quarrying | 2024 |
| Taylors Logistics Ltd | Transport & logistics | 2025 |
| Taymount Estate Farms Limited | Agriculture & fishing | 2026 |
| Taymount Estate Ltd | Hospitality | 2011 |
| Taymount Timeshare Nominees Limited | Administrative & support | 1988 |
| Taynuilt Consulting Limited | Health & social care | 2012 |
| Tayplay (U.K.) Limited | Manufacturing | 1996 |
| Tayplay Limited | Manufacturing | 1993 |
| Tayside Business Consultancy Ltd | Financial services | 2017 |
| Tayside Flooring Ltd | Wholesale & retail | 2018 |
| Tayside Industrial Pipefitters Ltd | Construction | 2023 |
| Tayside Industrial Pipefitting and Fabrication Ltd | Manufacturing | 2025 |
| Tayside Logistics Limited | Transport & logistics | 2016 |
| Tayside Marketing Ltd | Wholesale & retail | 2018 |
| Tayside Recycling Ltd | Wholesale & retail | 2024 |
| Tayside Upcycling & Craft Centre CIC | Wholesale & retail | 2020 |
| Tayside Ventilation Services Limited | Manufacturing | 2010 |
| Taytech Security Limited | Administrative & support | 2021 |
| Tayvalley Homes (Holdings) Limited | Financial services | 2024 |
| Tayvalley Homes Limited | Construction | 2001 |
| Tayview Kitchen Doors Limited | Construction | 2015 |
| TBL Organisational Development Limited | Professional & scientific | 2002 |
| Teagan Developments Ltd | Real estate | 2018 |