To do this they would have to have been told they were the winning bid, given bid submission deadline has yet to pass I highly doubt any company is on the open market acquiring shares of BIOA
Cargill has a large team of traders. I have a friend who has been a Cargill trader for years. If Cargill wants BIOAQ, it would make sense for them to have a team working on acquiring shares at pre-buyout prices.