- 1st Independence Financial Group Acquired By MainSource Financial Group
- 1st National Bank of Scotia Acquisitions
- 1st Pacific Bank of California Acquired By City National
- 1st Portfolio Holding Acquired By WashingtonFirst Bankshares
- 1st Secure IT Acquired By GM Security Technologies
- 1st State Insulation Acquired By Installed Building Products
- 1st United Bancorp Acquisitions
- 1st West Mergers & Acquisitions LLC
- 1stdibs.Com Acquisitions
- 1StopXBRL Acquired By Diversified Global Graphics Group
- 1stVision Acquired By Ambienta SGR
- 1Ticket Acquired By DTI Management
- 1to1 Card Acquired By SVM
- 1Vault Networks Acquired By Peak 10
- 1WorldSync Holdings Acquired By Battery Ventures
- 2 Sisters Food Group Acquisitions
- 2-10 Home Buyers Warranty Acquired By Genstar Capital
- 2-20 Records Management Acquisitions
- 2-DTech Acquired By Versarien
- 20 VIC Management Acquired By Cushman & Wakefield
- 20-20 Technologies Acquired By Golden Gate Capital
- 20/20 Image Eye Centers Acquired By Acuity Eyecare Group
- 20/20 Software Acquired By TechTarget
- 2020 Group USA Acquired By Panalitix Pty
- 2020 Vision Systems Acquired By Boston Networks
- 2080 Media Acquisitions
- 20:20 Mobile Group Acquired By Brightstar
- 20:20 Retail Data Insight Acquired By StayinFront
- 20lines S.r.l. Acquired By HarperCollins Publishers
- 20th Century Fox Acquisitions
- 20|20 Research Acquisitions
- 21 Apartment Communities in Texas Acquired By Pivotal Group
- 21 Chelsea Property Acquired By UDR
- 21 Grams AB Acquisitions
- 21 Invest Mergers and Acquisitions
- 21 Partners Mergers and Acquisitions
- 21 Three Clothing Acquired By boohoo.com
- 212 Labs Acquired By ScheduleOnce
- 212gaming Acquired By HootSuite Media
- 21c Telecom Acquired By Elitetele.com
