SGEN insiders sold a collective $13.8M(!) of stock in the past month or so: CEO: http://www.sec.gov/Archives/edgar/data/1060736/000120331113000080/xslF345X03/edgardoc.xml (~$4.5M, 9/3/13) http://www.sec.gov/Archives/edgar/data/1060736/000120331113000076/xslF345X03/edgardoc.xml (~$300K, 8/19/13) http://www.sec.gov/Archives/edgar/data/1060736/000120331113000056/xslF345X03/edgardoc.xml (~$80K, 8/1/13) COO: http://www.sec.gov/Archives/edgar/data/1060736/000120331113000084/xslF345X03/edgardoc.xml (~$1.9M, 9/10/13) http://www.sec.gov/Archives/edgar/data/1060736/000120331113000082/xslF345X03/edgardoc.xml (~$3.2M, 9/3/13) http://www.sec.gov/Archives/edgar/data/1060736/000120331113000072/xslF345X03/edgardoc.xml (~$140K, 8/19/13) CFO: http://www.sec.gov/Archives/edgar/data/1060736/000118143113047082/xslF345X03/rrd389430.xml (~$3.3M, 8/27/13) http://www.sec.gov/Archives/edgar/data/1060736/000120331113000074/xslF345X03/edgardoc.xml (~$140K, 8/19/13) EVP: http://www.sec.gov/Archives/edgar/data/1060736/000120331113000070/xslF345X03/edgardoc.xml (~$70K, 8/19/13) Director: http://www.sec.gov/Archives/edgar/data/1060736/000120331113000078/xslF345X03/edgardoc.xml (~$420K, 9/3/13)