- The Securance Group Acquired By BancorpSouth Insurance Services
- The Security Watchdog Acquired By Capita
- The SeedHouse Acquired By Wilbur-Ellis Company
- The SEFA Group Acquired By HeidelbergCement AG
- The Seff Group P.C. Acquisitions
- The Seff Group P.C. - Non-Attest Business Acquired By CBIZ
- The Segal Group Acquisitions
- The Seidler Co's., Inc.
- The Seisa Group Acquisitions
- The Seismic Collaborative Acquired By Spectrum Science Communications
- The Selbst Group Acquired By SmartPros
- The Select Family of Staffing Companies Acquisitions
- The Seltzer Group Acquired By Keystone Agency Partners
- The Sentinel Group Acquired By Change Healthcare
- The SEO Department Acquired By Barrington Media Group
- The Septeo Group Acquisitions
- The Service Center Acquired By Linde Gas North America
- The Service Companies Acquisitions
- The ServiceMaster Acquisitions
- The SES Technical Group Acquired By The Timken Company
- The Seves Group Acquisitions
- The Sextant Group Acquired By NV5 Global
- The Shade Store Acquired By Leonard Green & Partners
- The Shady Oaks Acquired By Algonquin Power & Utilities
- The Shape of Behavior Acquired By Blue Sprig Pediatrics
- The Sharma Group LLC (dba TSG)
- The Sharon Companies Acquired By Worthington Industries
- The Sharper Image Acquired By ThreeSixty Group
- The Shaw Group Acquisitions
- The Shawmark Group Mergers and Acquisitions
- The Shepherd Agency Acquired By AssuredPartners
- The Sheraton Casablanca Hotel Acquired By Actis Capital
- The Sheridan Group Acquisitions
- The Sherwin-Williams Acquisitions
- The Shipyard Acquisitions
- The Shobe Financial Group Acquired By Carson Group
- The Shorebreak Hotel Acquired By Diamondrock Hospitality
- The Shred Guy Acquired By AllShred
- The Shuford Insurance Agency Acquired By Arthur J. Gallagher
- The Shyft Group Acquisitions
