- Reaching Cowen February 25, 2019 Main U.S. Locations New York 599 Lexington Avenue New York, NY 10022 646 562 1010 800 221 5616 Atlanta 3399 Peachtree Road NE Suite 417 Atlanta, GA 30326 866 544 7009 International Location Cowen International Limited London 41 Snowden Street - 11th Floor London EC2A