ADXS insiders made small purchases at the market price on 12/30/16 (as they have done on the last trading day of each month): https://www.sec.gov/Archives/edgar/data/1100397/000149315217000066/xslF345X03/form4.xml (CEO) https://www.sec.gov/Archives/edgar/data/1100397/000149315217000065/xslF345X03/form4.xml (CSO) https://www.sec.gov/Archives/edgar/data/1100397/000149315217000063/xslF345X03/form4.xml (CFO) https://www.sec.gov/Archives/edgar/data/1100397/000149315217000064/xslF345X03/form4.xml (former COO; currently a director)