ACHN’s VC shareholders did some heavy selling on Dec 16-18, immediately after ACHN (prematurely) reported data from the ACH-1625 phase-1b trial. The total amount sold by three VC shareholders on Dec 16-18 was about 1.75M shares worth about $5.8M: http://sec.gov/Archives/edgar/data/1070336/000101297509000358/xslF345X03/edgar.xml http://sec.gov/Archives/edgar/data/889232/000118143109057864/xslF345X03/rrd260348.xml http://sec.gov/Archives/edgar/data/1033508/000093244009000720/xslF345X03/edgar.xml No further investigation is needed to understand why ACHN jumped the gun on reporting data from the first phase-1b cohort.