Clay Siegall, the brains behind Seattle Genetics

Clay Siegall, the brains behind Seattle Genetics

Clay Siegall is a graduate of the Maryland University and the George Washington University where he received a B.S in Zoology and a Ph.D. in Genetics respectively. Since then he has gone about to do great things in the medical field. He has authored a number of articles exceeding 70 and holds around fifteen patents.

Siegall’s career journey

Siegall began his career journey in 1988 working at the National Institute of health where he served until 1991. He then worked at the National Cancer Institute before moving to Bristol Myers Squibb Pharmaceutical Research Institute and later ventured into Seattle Genetics.

Siegall and the Seattle Genetics

In 1998, Clay Siegall launched Seattle Genetics. The idea of the company came from the five years in his youth that he watched his father suffer and eventually succumb to cancer. This brought him to the realization that the oncological industry lacked a lot when it came to tools. He made it a point to help develop the much-needed tools that would help save a lot of lives.

Seattle Genetics was launched with the aim of promoting drug development, scientific research and innovation as well. The main goal of the company is to help patients in a way that Siegall’s father wasn’t able to receive help.

Clay plays the role of Chief Executive Officer, President and member of Board of Directors in Seattle Genetics. Under his leadership, Seattle Genetics has become leading company when it comes to the development of ADCs. Seattle Genetics worked together with Takeda Pharmaceuticals in the development of ADCETRIS, an ADC that is FDA approved in more than 60 countries around the globe. The company has also received licensing for a number of ADC technologies that has earned the company close to 350 million dollars over the years of its running.

Siegall’s impeccable leadership has also led the company through financial prosperity by securing close to 1.2 billion dollars through private and public funding.


Siegall was named entrepreneur of the year in 2012 by Pacific Northwest and Ernst. He was also named alumnus of the year in 2013 by the Computer, Math and Natural Science departments of the Maryland University.