Kyle Lefkoff

Kyle Lefkoff is the Founder and General Partner of Boulder Ventures. In his 35 years as a venture capitalist, Mr. Lefkoff has invested in 61 Colorado companies.

Mr. Lefkoff founded Array BioPharma in May 1998 with Marv Caruthers and a group of Amgen scientists. Mr. Lefkoff was the Chairman of the Board of Array from its inception through August 2018. In that time, Array developed and human-tested more than twenty kinase inhibitors for cancer, five of which have been approved by the FDA. In July 2019, Array was acquired by Pfizer for $11.8 billion in cash, the largest acquisition of a venture-backed life sciences company in the history of Colorado.

He is also a Director of ArcherDX, CommercialTribe, and Black Bear Energy, all Boulder Ventures portfolio companies.

Mr. Lefkoff received his B.A. in Economics from Vassar College (summa cum laude) in 1981. In 1980, Mr. Lefkoff completed a Fellowship in Economic History at the London School of Economics. In 1985, he completed his MBA in Finance at the University of Chicago.

Mr. Lefkoff is an accomplished mountain guide and is Chairman of the American Institute for Avalanche Research and Education (AIARE), the curriculum standard for snow and avalanche professionals in the USA.