- Oklahoma Bar Association
- Oklahoma Gas & Electric (1)
- Oklahoma Press Association
- Oklahoma Farm Bureau
- Oklahoma Resources Integrated General Information Network Systems
Economic development information system containing current economic and demographic data on Oklahoma.
- Oklahoma Employees Credit Union
- Communication Federal Credit Union
- Oklahoma Association of Electric Cooperatives
Supported by electric distribution and generation/transmission cooperatives.
- Concrete Creations
Specializes in stained, colored, and stamped concrete. Also offers concrete countertops.
- WEOKIE Credit Union
Serving select employer groups from the Oklahoma area.
- Southwest Rural Electric Association, Inc.
Serving the people of Southwest Oklahoma and North Central Texas.
- Oklahoma Health Information Management Association
Provides leadership, education, and resources for information specialists.
- Municipal Electric Systems of Oklahoma (MESO)
Public power utility.
- Oklahoma Ready Mixed Concrete Association
Representing companies in the ready mixed concrete industry.
- International Interior Design Association (IIDA) - Texas/Oklahoma Chapter
Local chapter information, jobline, and more.
- Pumps of Oklahoma
A wholesale distributor for environmental remediation supplies, industrial, and oilfield pumping equipment.
- Oklahoma Bison Association
Organizes and promotes the bison industry in Oklahoma through seminars, newsletters, and annual show and sales.
- United Supermarkets of Oklahoma
Full service grocery chain owned and operated by Oklahomans, with locations throughout the state.
- Hunzicker Brothers, Inc.
- Central Oklahoma Homebuilders Association Parade of Homes