Organizers
- Unplugged Adventures
- Up & Over
- Up and Running in Dayton
- UP Land Conservancy
- Up North Standup Paddleboard Classic
- UPBC
- Updated - YMCA of Metropolitan Los Angeles
- UPIKE Basketball Camps
- Upland American Little League
- Upper Chesapeake Health Foundation
- Upper Deck Training Center
- Upper Dublin Sports Center
- Upper Makefield Business Association
- Upper Moreland Parks and Recreation
- Upper Peninsula Bible Camp
- Upper Perkiomen Youth Baseball Association
- Upper Room Christian School
- Upper Sugar River Watershed Association
- Upper Township Beach Patrol
- Upper Valley Aquatic Center
- Upper Yadkin Valley Habitat for Humanity
- Upperline LLC
- Upstate Splash
- Upstate-Carolina Adaptive Golf
- Upswing Clinics, LLC
- Upturn Arts
- Upward Elementary
- UQuest - The Urban Competition
- UR Kids
- Uranko Productions
- Urban Adamah
- Urban Adventure Camps
- Urban Attack
- Urban Dare
- Urban Ecology Center
- Urban Ninja Obstacle Course
- Urban Outdoor Fitness
- Urban Street Team
- Urbana Little League
- URBANA PARK DISTRICT
- Urbandale Girls Rec. Association
- Urbandale Little League
- Urbandale Soccer Club
- Urbanity Dance
- Urgent Pets on Death Row
- Urology Health Foundation
- Ursuline Academy
- URUN4 Race LLC
- US Bank Team Stayin' Alive - Relay For Life
- US Express Track Club
