 Aby Mathew, Exec VP And Chief Scientific Off at Biolife Solutions NASDAQ:BLFS, made a large buy and sell of company shares on September 22, according to a new SEC filing. What Happened: A Form 4 filing from the U.S. Securities and Exchange Commission states that Aby Mathew exercised options to purchase 20,000 Biolife Solutions shares at a price of 1.64 per share for a total of 32,800 on September 22. 