- c20y Acquired By Terazo
- C21 Data Services Acquired By Recall Holdings
- C21 Investments Acquisitions
- C24 Technologies Acquired By Gresham Technologies
- c2b Horizons Acquired By PatientBond
- C2B Solutions Pty Acquired By Impelus
- C2C Outdoor Acquired By Dentsu Aegis Network
- C2C Restaurant Group Acquired By Independent Film Development
- C2C Systems Acquired By Barracuda Networks
- C2Dx Acquisitions
- C2G International Acquired By Vidaris
- C2Net Software Acquired By Red Hat
- C2S Consulting Group Acquired By SMX
- C3 Capital Mergers and Acquisitions
- C3 Consulting Acquired By Trimble
- C3 Global Biosciences Acquired By Isodiol International
- C3 Risk & Insurance Services Acquisitions
- C3 Technologies AB Acquired By Apple
- c3/consulting Acquired By Ankura Consulting Group
- C3/CustomerContactChannels Acquired By Everstone Group
- C30 Medical Acquired By InTouch Health
- C360 Technologies Acquired By Cosm Immersive
- C3i Solutions Acquired By HCL Technologies
- C3i Acquired By Telerx Marketing
- C3S Securiglass Acquired By Promat International NV
- C4 Laboratories Acquired By SC Laboratories
- C4 Recovery Foundation Acquisitions
- C4 Recovery Foundation - Addiction Education Events Acquired By HMP Global
- C4 Recovery Solutions Acquisitions
- C42 Engineering India Pvt. Acquired By PT Aplikasi Karya Anak Bangsa
- C4i Pty. Acquired By Exelis
- C4X Discovery Holdings Acquisitions
- C5 Capital Mergers and Acquisitions
- C5MI Acquired By YASH Technologies
- C6 Intelligence Information Systems Acquired By Mergermarket
- C9 Acquired By XANT
- C?Suite Communications Acquired By On Ideas
- CA Casyso AG Acquired By Instrumentation Laboratory
- CA Plus Acquired By Gentrack Group
- CA Specialities Acquired By Charkit Chemical
