Of what nationality are both Dentsply Sirona and Omnicom Group?
Omnicom Group Omnicom Group, Inc. is an American global marketing and corporate communications holding company, headquartered in New York City.
OMNOVA Solutions OMNOVA Solutions Inc., is an Global manufacturer of emulsion polymers, specialty chemicals, and functional and decorative surfaces. OMNOVA was founded in 1999 when GenCorp spun off its Decorative & Building Products and Performance Chemicals businesses into a separate, publicly traded company. OMNOVA's world headquarters is located in Beachwood, Ohio with additional sales, manufacturing and distribution locations through Europe and Asia.