Today's Bell Ringer, September 29, 2016

9:16 AM ET Thu, 29 Sept 2016

Today's bell ringers are Adam Elsesser, Penumbra Inc. Chairman, CEO & President, and stroke survivor Christian England-Sullivan, raising stroke awareness, at the NYSE, and Tabula Rasa Healthcare and Dr. Calvin Knowlton, CEO, Chairman & Founder, celebrating the company's IPO, at the Nasdaq.