ENTA—BlackRock upped its stake from 10.9% to 12.3% during 2017—an increase of 277K shares: https://www.sec.gov/Archives/edgar/data/1177648/000021545718001530/us29251m1062_011718.txt https://www.sec.gov/Archives/edgar/data/1177648/000086931117000392/enanta.pharmaceuti.txt