MINNEAPOLIS--(BUSINESS WIRE)--Piper Sandler Companies (NYSE: PIPR), a leading investment bank, is pleased to announce the addition of Stuart M. Essig, Ph.D. to its board of directors. “Stuart will be a great asset to our board of directors. He brings deep experience and knowledge of the healthcare and medical technology industries, which remain important sectors for our investment banking business. In addition, his proven track record of leading a growing, publicly traded company will provide v.