- 4 Seasons Car Wash Acquired By Splash Car Wash
- 4 Seasons Landscape Group Acquired By BrightView Holdings
- 4 Service Pros Acquired By Strikepoint Group Holdings
- 4 West Holdings Acquisitions
- 4-Antibody AG Acquired By Agenus
- 4-Front Research Acquired By Intertek Group
- 4-Tell Acquired By B7 Interactive
- 4-Way Electric Acquired By Versatile Processing Group
- 40 North Management Mergers and Acquisitions
- 401 Diagnostics Acquired By ExamWorks
- 401k Advisors Acquired By HUB International
- 401k Management Group Acquired By National Financial Partners
- 401k Plus Acquired By Ascensus
- 401kplans.com Acquired By Envestnet
- 404 Media Acquired By Artlist S.a.r.l
- 41 North LLC
- 42 North Dental Acquisitions
- 42 North Solutions Acquired By Sequoia Consulting Group
- 424 Capital Mergers and Acquisitions
- 42Floors Acquired By Yardi Systems
- 42Six Solutions Acquired By DXC Technology Company
- 43 acres of land Acquired By Liberty Property Trust
- 44 Capital Finanças Corporativas
- 440 Labs Acquired By Ecoark Holdings
- 4505 Meats Acquired By Benestar Brands
- 451 Research Acquired By S&P Global
- 454 Life Sciences Acquired By Roche Holding AG
- 46 Labs Acquisitions
- 4612 Group Mergers and Acquisitions
- 479 Sales & Marketing Acquired By The Bluebird Group
- 47Lining Acquired By REAN Solutions
- 48forty Solutions Acquisitions
- 48North Cannabis Acquired By HEXO
- 4Base Technology Acquired By CA Technologies
- 4basebio Acquisitions
- 4C Business Solutions Acquired By Flexible Architecture and Simplified Technology
- 4C Capital Mergers and Acquisitions
- 4C Consulting Acquisitions
- 4C Consulting Acquired By Wipro
- 4C Insights Acquisitions
