- 3Com Acquisitions
- 3CX Acquisitions
- 3D Data & Document Destruction Acquired By AllShred
- 3D Eye Solutions Acquired By 3D Eye Solutions
- 3D Eye Solutions Acquisitions
- 3D Geo Acquired By Autodesk
- 3D Hubs Acquisitions
- 3D Line Medical Systems S.r.l Acquired By Elekta AB
- 3D Medical Manufacturing Acquired By Tecomet
- 3D Oil Acquisitions
- 3D Plastics Acquired By Quantum Plastics
- 3D Plus SA Acquired By HEICO
- 3D Star Insurance Services Acquired By Worldwide Facilities
- 3D Systems Acquisitions
- 3D3R Software Studio Acquired By Chegg
- 3dB Research Acquired By Harman International Industries
- 3Di Technologies Acquired By L3 Technologies
- 3DM Systems Acquired By GN Store Nord A/S
- 3DPlusMe Acquired By WhiteClouds
- 3DPrint.com Acquired By MecklerMedia
- 3Dsolve Acquired By Lockheed Martin
- 3DX Industries Acquisitions
- 3esi-Enersight Acquisitions
- 3Events Agency Acquired By MCI Group Holding SA
- 3F Chimica Acquired By Kemira Oyj
- 3F Therapeutics Acquisitions
- 3form Acquired By Hunter Douglas NV
- 3G Capital
- 3GS Acquisitions
- 3H Technology Acquired By QinetiQ Group
- 3i Group Acquisitions
- 3i Infotech Acquired By ObjectWay
- 3i Infotech Acquisitions
- 3i Infrastructure
- 3i Private Equity
- 3i Supply Acquired By Distribution International
- 3i Systems Acquired By Kronos
- 3M - Digital Signage Assets Acquired By LSI Industries
- 3M - Global Static Control Business Acquired By Desco Industries
- 3M - Identity Management Business Acquired By Gemalto NV
