- Thomas Sikorski
- Thomas Simon
- Thomas Simon Acquired By The Ince Group
- Thomas Skinner & Son Acquired By Regimen Equity Partners
- Thomas Smale
- Thomas Sniscak
- Thomas Soda Kemper Acquired By Big Red
- Thomas Souleles
- Thomas Spencer
- Thomas Spring
- Thomas Stafford, Jr.
- Thomas Stanat
- Thomas Steiglehner
- Thomas Stein
- Thomas Stein
- Thomas Sterken
- Thomas Stevens
- Thomas Stoltz
- Thomas Storgaard
- Thomas Strauss
- Thomas Stromberg
- Thomas Studd
- Thomas Svensen
- Thomas Tarnowski
- Thomas Temple
- Thomas Thesing
- Thomas Thordal Sevelsted
- Thomas Title & Escrow Engineering Acquired By Stewart Information Services
- Thomas Titus
- Thomas Tolley
- Thomas Tomlinson
- Thomas Trauttmansdorff
- Thomas Trideau
- Thomas Tuttle
- Thomas Tynan
- Thomas Uger
- Thomas Urlacher
- Thomas Usher
- Thomas Utgard
- Thomas van der Meulen
