- 3H Technology Acquired By QinetiQ Group
- 3i Infotech Acquired By ObjectWay
- 3i Infotech Acquisitions
- 3i Infrastructure Mergers and Acquisitions
- 3i Private Equity Mergers and Acquisitions
- 3i Solutions Acquired By Nu Skin Enterprises
- 3i Supply Acquired By Distribution International
- 3i Systems Acquired By UKG
- 3Insys Acquired By Smart Energy Water
- 3K Agentur für Kommunikation Acquired By WPP
- 3K Oil Services Acquired By Tervita
- 3LOG Systems Acquired By Trimble
- 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
- 3m - Pressurized Polyurethane Foam Adhesives Business Acquired By Innovative Chemical Products Group
- 3M - Ballistic Protection Business Acquired By Avon Protection
- 3M - Drive Thru Communications Systems Business Acquired By PAR Technology
- 3M - Gas & Flame Detection Business Acquired By Teledyne Technologies
- 3M - Noise Environmental and Heat Stress Monitoring Products Acquired By TSI
- 3M - North American Library Systems Business Acquired By Bibliotheca AG
- 3M - Safety Prescription Eyewear Business Acquired By HOYA Optical Laboratories
- 3M - Taper Dry Powder Inhaler Acquired By Adamis Pharmaceuticals
- 3M Company Acquisitions
- 3mensio Medical Imaging BV Acquired By Pie Medical Imaging BV
- 3MG Media Acquisitions
- 3MotionAI Acquisitions
- 3P Air freighters Acquisitions
- 3P Biopharmaceuticals Acquired By Keensight Capital
- 3P Development Acquired By Infinum
- 3P Equity Partners Mergers and Acquisitions
- 3P Learning Australia Pty. Acquired By IXL Learning
- 3P Processing Acquired By Spell Capital Partners
- 3PAR Acquired By HP
- 3Phase Elevator Acquisitions
- 3Phoenix Acquired By Ultra Electronics Holdings
- 3Pillar Global Acquisitions
- 3PItalia Acquired By Tiscali
- 3PL Central Acquisitions
- 3PL Resources Acquired By Cathay Investments
