- Rabo Ag Services Inc.
- Radisson Quad City Plaza
- Ralston Foods, Inc
- Ramadaby Wyndham Bettendorf
- Regional Health Services of Howard County
- Regional Medical Center
- Reliance State Bank
- Ridgecrest Village
- Ringgold County Hospital
- River Valley Cooperative
- Roberts and Dybdahl, Inc
- Rockwell Collins
- Ryko Manufacturing Co.
- Sanford Rock Rapids Clinic
- Sanford Sheldon Medical Center
- Sartori Memorial Hospital
- Seasons Center for Behavioral Health
- Security National Bank
- Security Savings Bank
- Select Specialty Hospital - Quad Cities
- Service Trucks International
- Shelby County State Bank
- Shenandoah Medical Center
- Shenandoah Public Library
- Siemens Corp.
- Sioux Center Health Avera
- Sioux City Fire Rescue
- Sioux County Courthouse
- Siouxland Community Health Center
- Skiff Medical Center
- Southeast Iowa Regional Medical Center - Fort Madison
- Southeast Iowa Regional Medical Center - West Burlington
- Southern Iowa Oil
- Spencer Hospital
- St. Anthony Regional Hospital
- St. Luke's Regional Medical Center
- Stanley Consultants, Inc. - Coralville
- Stanley Consultants, Inc. - Des Moines
- Stanley Consultants, Inc. - Muscatine
- Stewart Memorial Community Hospital
- Stonehill Franciscan Services
- Story County Hospital
- Success Bank
- The Diamond Jo Casino
- The HON Company
- The University of Iowa College of Public Health
- The Weitz Company
- Triple F Inc.
- Tur-Pak Foods
- Turnkey Communication Solution