- 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 Partners
- 21 Three Clothing Acquired By boohoo.com
- 212 Labs Acquired By ScheduleOnce
- 212gaming Acquired By HootSuite Media
- 21c Telecom Acquired By Elitetele.com
- 21Net Acquired By Alstom S.A.
- 21sportsgroup Acquisitions
- 21st Century Grain Processing Acquired By Viterra
- 21st Century Group
- 21st Century Health & Benefits Acquired By Fringe Benefits Management
- 21st Century Insurance Group Acquired By Farmers Group
- 21st Century Labels Acquired By Inovar Packaging Group
- 21st Century Oncology of Washington Acquisitions
- 21Vianet Group Acquisitions
- 22-story Class A office building Acquired By Kilroy Realty
- 225 Second Avenue in Greater Boston Acquired By Alexandria Real Estate Equities
- 2338 Technologies Acquired By Predictive
- 2382258 Ontario Acquired By Gateway Media
- 24 Hour Fitness Worldwide Acquisitions
- 24 Hr. Vending Acquired By Continental Services
- 24 Mobile Advertising Solutions AB Acquisitions
- 24 Seven Acquired By Morgan Stanley Capital Partners
- 24-7 Telcom Acquisitions
- 24-Property Retail Portfolio In New England Acquired By Kimco Realty
- 24/7 Customer Acquisitions
- 24/7 Customer Acquisitions
- 24/7 Media Acquisitions
- 24/7 Solutions inc. Acquired By SENTEL
- 24/7 Technology Acquired By Unified Power Holdings
- 247 Hoivakodit Oy Acquired By Attendo Group AB
- 247MGI Acquisitions
- 247Sports Acquired By CBS Sports Network
- 24h.ae Acquired By foodpanda
