David Kalergis (born December 9, 1948) is an American life sciences entrepreneur and the Co-founder and Chief Executive Officer of Diffusion Pharmaceuticals Inc, a Charlottesville, Virginia, U.S.-based biotechnology and pharmaceutical company.
He co-founded the company in 2001 with American chemical engineer John L.
Gainer.
Kalergis became Diffusion's CEO in 2004, a position in which he has drawn extensively on his career in law, business, and clinical trials implementation.
Under Kalergis’ leadership, Diffusion Pharmaceuticals has been cited for advancing improved cancer treatments and is currently conducting multicenter clinical trials of a novel therapeutic for brain cancers, including glioblastoma multiforme.