Ethelmae Humphreys

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Ethelmae Humphreys of Tamco Roofing Products is a board member of the Cato Institute and is listed as a Koch strategy group attendee. She was acknowledged at the Koch seminar in June 2011 in Vail, Colorado for donating at least $1 million to Koch-related causes. [1]

Articles and resources


  1. Gavin Aronsen, Exclusive: The Koch Brothers' Million-Dollar Donor Club, Mother Jones, September 6, 2011

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