Organizers
- Seacoast United Foundation
- Seafari Girls
- Seaford Wellness Council
- SEAKR FOUNDATION
- SEAL Swim Club
- Seamark Ranch
- Sean Connollys
- Sean Gorgone Golf Instruction
- Sean O'Connor Incorporated
- Sean Phillips Soccer
- Sean Ryan
- SEARCH 5K COLOR RUN (FREE)
- Searcy Tennis Club
- Seashells & Sit Ups
- Seashore Gardens Living Center
- Seashore Striders Event Productions, Inc.
- Seasons Soccer Club
- Seattle Against Slavery
- Seattle Area Rowing Association
- Seattle Arts & Lectures
- Seattle Audubon
- Seattle Barista Academy, LLC
- Seattle Chess School
- Seattle Children’s Museum
- Seattle Children's Museum
- Seattle Eastside Young Engineers LLC
- Seattle Elite Baseball
- Seattle Elite Baseball Tournaments
- Seattle JazzED
- Seattle Pacific University
- Seattle Preparatory School
- Seattle Sounders FC
- Seattle University
- Seattle Youth Basketball
- Seattle Youth Symphony Orchestra
- Seattle's Littlest Performers
- Seattle's Performers LLC
- Sebastian Inlet Surf & Sport
- Sebastian Inlet Surf and Sport
- Seckman High School Tennis Club
- Second Presbyterian Church Memphis
- Second Star to the Right
- Second Wind Fund, Inc.
- Secret Meals
- Section 7 Project, Inc./ Trail of Terror
- Security Professional Development Institute,LLC
- Sedalia Runners Club
- Sedona Arts Center
- Sedona Golf Resort
- Sedro Woolley Little League
