The documents were initially anonymously sourced, but later found to have been obtained by climate scientist Peter Gleick. The documents included a fundraising plan, board of directors meeting minutes, and the organization's 2012 budget. The documents were analyzed by major media, including "The New York Times", "The Guardian", United Press International and the Associated Press. Donors to the Institute included the Charles G. Koch Charitable Foundation, Microsoft, General Motors, Comcast, Reynolds American, Philip Morris, Amgen, Bayer, GlaxoSmithKline, Pfizer and Eli Lilly, liquor companies, and an anonymous donor who had given $13 million over the past five years.