not "paid to defend Wal-Mart" and did not receive funding from the corporation; it did not disclose the approximately $300,000 received from the Walton Family Foundation. In 2010, MediaTransparency said that Heartland received funding from politically conservative foundations such as the Castle Rock Foundation, the Sarah Scaife Foundation, the John M. Olin Foundation, and the Lynde and Harry Bradley Foundation. Between 2002 and 2010, Donors Trust, a nonprofit donor-advised fund, granted $13.5 million to the institute. In 2011, the institute received $25,000 from the Charles G. Koch Charitable Foundation. The Charles Koch Foundation states that the contribution was "$25,000 to the Heartland Institute in 2011 for research in healthcare, not climate change, and this was the first and only donation the Foundation made to the institute in more than a decade". In 2012, a large number of sponsors withdrew funding due to the 2012 documents incident and the controversy over their billboard campaign. The institute lost an estimated $825,000, or one third of planned corporate fundraising for the year. According to the organization's audited financial statements for 2014 and 2015 approximately 27% and 19% of revenues, respectively, came from a single unidentified donor. In 2022 Propublica claimed that Barre Seid was “the major patron”. 2012 documents leak On February 14, 2012, the global warming blog DeSmogBlog published more than one hundred pages of Heartland documents said to be from the institute. Heartland acknowledged that some internal documents had been stolen, but said that one, the "Climate Strategy memo", was forged to discredit Heartland. 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. The documents contained details of payments to support climate change deniers and their programs, namely the founder of the Center for the Study of Carbon Dioxide and Global Change, Craig Idso ($11,600 per month), physicist Fred Singer ($5,000 plus expenses per month), geologist Robert M. Carter ($1,667 per month) and