William Dreyfoos is an American businessman and philanthropist known for his contributions to the fields of technology and education. He served as the CEO of Renaissance Technologies, a quantitative hedge fund, where he played a significant role in its growth and success. Dreyfoos is also recognized for his work in promoting science and technology initiatives. In addition to his business achievements, Dreyfoos has been actively involved in various charitable endeavors. He has supported educational institutions, including Florida Atlantic University, where he has made substantial donations to enhance research and learning opportunities. His commitment to philanthropy reflects his belief in the importance of education and innovation.