- United States Surety Acquired By HCC Insurance Holdings
- United States Truck Driving School Acquired By The TransForce Group
- United States University Acquired By Aspen Group
- United States Warranty Acquired By Protective Life
- United Stationers - Azerty Ink & Toner Business Acquired By Synnex Canada
- United Steel Supply Acquired By Steel Dynamics
- United Structural Consultants Acquired By ARCXIS
- United Structural Products Acquired By Atkore International
- United Subcontractors Acquisitions
- United Supermarkets Acquired By Albertsons Companies
- United Supply & Distributing Acquired By Ferguson Enterprises
- United Surgical Partners International Acquired By Tenet Healthcare
- United Surgical Partners International Acquisitions
- United Systems Technology Acquisitions
- United Tactical Systems Acquired By Expedition Capital Partners
- United Talent Agency Acquisitions
- United Teacher Associates Insurance Acquired By Innovate
- United Technical Publishing Acquired By Arrow Electronics
- United Technology Group Acquired By Coretelligent
- United Technology Acquired By UPSTACK
- United Tele Health Acquired By Intechnology
- United Telecom NV Acquisitions
- United Telecommunication Services N.V. Acquired By Liberty Latin America
- United Test and Assembly Centre Acquisitions
- United Therapeutics Acquisitions
- United Therapies Acquired By HealthTronics
- United Tote Acquired By TwinSpires
- United Transfer Acquired By Consolidated Fastfrate
- United Transportation - Fuel Delivery Fleet Acquired By Sentinel Transportation
- United Transportation Acquisitions
- United Transportation Group Acquired By Lakeshore Railcar Services
- United Uniform Acquired By Safariland
- United Urology Group Acquisitions
- United Utilities Group Acquisitions
- United Utilities Acquired By Badger Meter
- United Utility Services Acquisitions
- United Valley Insurance Services Acquired By Renaissance Group
- United Vein & Vascular Centers Acquired By Amulet Capital Partners
- United Vending & Market Services Acquired By Continental Services
- United Veterinary Care Acquired By Nordic Capital
