- The SI Organization Acquisitions
- The Siam Cement Public Acquisitions
- The Siam Commercial Bank Public Acquisitions
- The Sicame Group Acquisitions
- The Sicilian Butcher Acquired By Savory
- The Sid Murray Acquired By Selman
- The Sidwell Acquired By Harris Local Government
- The Sienna Group Mergers and Acquisitions
- The Sigma Group Mergers and Acquisitions
- The Signature Memorial Group Acquired By Park Lawn
- The Signis Group Acquired By One Touch Health
- The Silicon Partners Acquisitions
- The Sill Family Vineyards Acquisitions
- The Silva Companies Acquired By Primoris Services
- The Silverfern Group Mergers and Acquisitions
- The Simple Greek Acquired By WOWorks
- The Simplify Group Acquisitions
- The Simply Good Foods Company Acquisitions
- The Simply HR Software Acquired By Wolters Kluwer N.V.
- The SimplyBiz Group Acquisitions
- The Sims Clinic Acquisitions
- The Singer Group Acquired By The Segal Group
- The Siqnificant Company Oy Acquired By Eezy Oy
- The Skin Clique Acquired By Graham Healthcare Capital
- The SKS Group Acquired By Masco
- The Skyway Group Acquisitions
- The Slate Group Acquisitions
- The SLC Group Acquired By Lifeways Community Care
- The Sleep Train Acquired By Mattress Firm Holdings
- The Sloan Company Acquisitions
- The SLTN Group Acquired By TDM Holdings N.V.
- The Small Exchange Acquired By IG Group Holdings
- The Smart Cube Acquired By WNS
- The Smile Center Acquired By JDC Healthcare Management
- The Smith Companies Acquired By LTC Global
- The Smithers Group Acquisitions
- The Smithers Group - Avanza Bioanalytical Services Business Acquired By Inotiv
- The Snelson Companies Acquired By Power Line Services
- The Sniffers NV Acquired By WTS Energy
- The Soccer Collective Acquisitions
