- Ubisec Systems, Inc.
- Unapparencies & Intra-Racial Insight Sensitivity Education, LLC
- Unclaimed Property Consulting & Reporting LLC
- Unified Communications Systems, LLC [DBA GoLiveSMS]
- Unite IT Solutions, LLC
- United Development USA, Inc.
- United Region Transit Services LLC
- Universal Engineering Consulting Services, LLC
- Universal EVoIP Transitions LLC
- Universal Packaging Corporation
- Universal Services LLC
- Unmanned Imagery Solutions, LLC
- Unmanned Sensing Systems Innovations (USSi)
- Upstream Strategies LLC
- Upward Finance LLC
- US Cloud LC
- US Elite Gear, Inc.
- US Export Capital Group, LLC [DBA Nextrade Group]
- USA Couriers, Inc
- USA Nuclear LLC
- USMILCOM, Inc.
- Uweport LLC