Piper Jaffray (NYSE: PJC) announced today that it has promoted Mike Ritzenthaler to senior research analyst, vice president, of clean technology and industrial growth. Ritzenthaler has extensive industry experience, relationships with key thought leaders and an in-depth understanding of industrial biotechnology. He will be based in Minneapolis and will cover a select list of small-, mid- and large-cap companies, primarily within diversified chemicals, advance materials and industrial biotech subsectors. “Through expanding our breadth and depth of coverage of clean technology and industrial growth, we can further serve the needs of our clients,” said Jeff Klinefelter, director of research at Piper Jaffray. “Mike has already proven to be a great contributor toward this effort.” Prior to joining Piper Jaffray in 2010, Ritzenthaler worked as a chemical engineer for Natureworks, a joint venture with Dow Chemical and Cargill, as well as in plant design and construction with AMEC. He co-invented patents for fractionating lignocellulosics and yeast biotechnology, and won a NASA award for research and development on polymer composites. Ritzenthaler holds bachelor’s degrees in chemistry from Lawrence University, Appleton, Wisconsin, and in chemical engineering from Washington University, St. Louis, Missouri. He has held the Professional Engineer license from the state of Minnesota since 2007. Piper Jaffray has 37 senior research analysts located in Minneapolis, New York, San Francisco, Chicago, Hong Kong and Shanghai. The firm provides research coverage on 625 companies globally in key sectors: business and financial services; clean technology and industrial growth; consumer; healthcare; and technology, media and telecom. About Piper Jaffray Piper Jaffray is a leading investment bank and asset management firm serving clients in the U.S. and internationally. Our proven advisory teams combine deep product and sector expertise with ready access to global capital. Founded in 1895, the firm is headquartered in Minneapolis with offices across the United States and in Hong Kong, London and Zurich. www.piperjaffray.com Since 1895. Member SIPC & NYSE. © 2012 Piper Jaffray & Co.