- S.I. Industries Acquired By Finzer Roller
- S.i. Systems Acquisitions
- S.I. Therapies Acquired By Boston Scientific
- S.I.N. Implant System Acquired By Southern Cross Group
- S.I.P. of Delaware Acquired By Williams Industries
- S.I.R. Warehouse Sports Store Acquired By Cabela s
- S.J. Electro Systems Acquisitions
- S.J. Irvine Fine Foods Acquired By Premium Brands Holdings
- S.J. Services Acquired By New Jersey American Water
- S.J. Welding and Industrial Supply Acquired By nexAir
- S.K Das
- S.K. Wellman Acquired By Hawk
- S.K.B. Acquired By Clarus
- S.L. Danielle Acquired By Bernard Chaus
- S.M. Electric Company Acquired By Matrix SME
- S.N. Potter Insurance Agency Acquired By Alteris
- S.O.S. Food Lab Acquired By Valencia Capital
- S.O.Tech / Special Operations Technologies Acquired By Ultra Electronics Holdings
- S.P. Richards Company Acquisitions
- G Acquisitions
- S.P.L.A.T. Acquired By Cardno
- S.Pack & Print Public Acquired By Oji Holdings
- S.R. Sales Company Acquired By Trivest Partners
- S.R. Smith /Fiberstars pool lighting business/ Acquired By Energy Focus
- S.R. Smith Acquisitions
- S.R. Travel Service Acquired By Direct Travel
- S.Roque - Máquinas e Tecnologia Laser S.A Acquired By Explorer Investments
- S.S. Kemp Acquired By TriMark USA
- S.S. of Kansas Acquired By Kelly Capital
- S.Sriniwasan
- S.T. Good Insurance Acquired By Relation Insurance Services
- S.T. Griswold & Company Acquired By S. D. Ireland Concrete Construction
- S.T. Specialty Foods Acquired By TreeHouse Foods
- S.T.E.R.I. srl Acquired By Atlas Copco AB
- S.U.R.&R Acquired By Husky
- S.W. Electronics & Manufacturing Acquisitions
- S.Zhaveri Pharmakem Pvt. Acquisitions
- S.Zhaveri Pharmakem Pvt. - Distribution Business Acquired By Azelis Group NV
- S/P2 Acquired By American Safety Council
- S1 Acquisitions