سلام

طبق این اطلاعیه در آدرس ETS این شرکتی هست که ETS مالک اون هست.
اینجا

Prometric™

Prometric™, the recognized global leader in technology-enabled testing and assessment services, provides test development, test delivery and data management capabilities to approximately 500 clients in the academic, professional, government, corporate and information technology markets via the web or by utilizing a robust test center network in 135 countries. ETS's TOEFL® and GRE® tests and Praxis™ teacher licensing assessments are delivered at Prometric test sites.

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