Dr. Clay Siegall serves as the president, CEO and chairman of Seattle Genetics, the biotechnology company he founded in 1997.
The Washington-based company helps develop targeted cancer therapies to treat patients' unmet needs. Under Dr. Siegall’s leadership, Seattle Genetics has built a diverse flotilla of antibody-based cancer therapies, including ADCETRIS, which was granted accelerated FDA approval in 2011.
Since 1997, Dr. Siegall has served as one of the company’s directors, and he assumed the role of president in 2000. In 2002, he became Seattle Genetics’ CEO, and he has been the board chairman since 2004. During his tenure, the company has raised more than $675 million through public and private offerings, and it went public in 2001.
Prior to his career with Seattle Genetics, Dr. Siegall worked as a principal scientist at Bristol Myers Squibb Pharmaceutical Research Institute. From 1988 to 1991, he was a staff fellow and biotechnology fellow with the National Cancer Institute, National Institutes of Health.
Dr. Siegall has received numerous awards and accolades for his contributions to the scientific community, including being recognized as the Ernst & Young’s Entrepreneur of the Year and the Puget Sound Business Journal’s Dealmaker of the Year. He has authored over 70 publications and holds 15 patents.
Dr. Siegall currently serves on the boards of Mirna Therapeutics, Ultragenyx Pharmaceuticals and Alder Biopharmecuticals. He received his B.S. in zoology from the University of Maryland and his Ph.D. in genetics from George Washington University.
What is Clay B. Siegall's net worth?
The estimated net worth of Clay B. Siegall is at least $184.53 million as of March 26th, 2025. Dr. Siegall owns 806,736 shares of Seagen stock worth more than $184,532,793 as of April 1st. This net worth estimate does not reflect any other investments that Dr. Siegall may own. Learn More about Clay B. Siegall's net worth.
How do I contact Clay B. Siegall?
The corporate mailing address for Dr. Siegall and other Seagen executives is 21823 30TH DRIVE SE SUITE, BOTHELL WA, 98021. Seagen can also be reached via phone at (425) 527-4000 and via email at investors@seagen.com. Learn More on Clay B. Siegall's contact information.
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