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Team Member


Kyle Lefkoff

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Kyle Lefkoff is the Founder and General Partner of Boulder Ventures Ltd. In his thirty-three year career as a venture capitalist, Mr. Lefkoff has invested in 60 Colorado companies.

Mr. Lefkoff’s life science investments include Hauser Chemical Research (NASDAQ: HAUS); NeXstar Pharmaceuticals (sold to Gilead Sciences), Array BioPharma (NASDAQ: ARRY), Dharmacon (sold to Fisher Scientific), Genomica (sold to Exelixis), ARCA Biopharma (NASDAQ: ABIO), miRagen Therapeutics (NASDAQ: MGEN), and ArcherDX.

Information technology investments include McData (sold to EMC); Atlantes Corp. (sold to Metromail); Compatible Systems Corp. (sold to Cisco Systems); Wall Street on Demand (sold to Goldman Sachs), Lefthand Networks (sold to HP), Linerate Systems (sold to F5), and CommercialTribe.

Natural foods retailing investments include Horizon Organic Dairy (sold to Dean Foods); Alfalfa’s Markets (sold to Wild Oats); and Fresh & Wild PLC (sold to Whole Foods).

Mr. Lefkoff was the Chairman of the Board of Array BioPharma (NASDAQ: ARRY) until August 2018, the largest pharmaceutical company in Boulder, Colorado.  Mr. Lefkoff founded Array in May 1998 with Dr. Marv Caruthers, Distinguished Professor of Chemistry and Biochemistry at the University of Colorado, and a group of Amgen scientists.  He is also Chairman of the Board of ArcherDX, and a Director of Black Bear Energy and CommercialTribe, 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 experienced alpinist and mountain guide, with difficult ascents to his credit in the French Alps, Peruvian Andes, and the major ranges of North America.  He was a member of the 1986 American Expedition to the North Face of K2.  Mr. Lefkoff is a Lifetime Member and former Director of the American Mountain Guides Association, and a former Director of The Access Fund, a national climbing advocacy organization.

Mr. Lefkoff is the Chairman of the American Institute for Avalanche Research and Education (AIARE), the avalanche education standard among mountain guides and snow professionals in the USA.