The ENTA seller was Shionogi—see table from the recent annual-report proxy: https://www.sec.gov/Archives/edgar/data/1177648/000119312519012894/d659936ddef14a.htm#toc659936_3 Shionogi acquired its ENTA shares in a 2004 antibiotics collaboration that has long been defunct. The above was confirmed by CEO, Jay Luly on the Oppenheimer webcast going on now.