The US Department of Justice (DOJ) recently sued former joint venture partners because they allegedly coordinated their competitive activities beyond the legitimate scope of their venture. This case illustrates several important points. First, companies who collaborate through joint ventures and similar arrangements need to be mindful that any legitimate collaborative activity does not “spill over” to restrain competition in other unrelated areas. Second, DOJ discovered the conduct during its review of documents produced in connection with a merger investigation. This is the most recent reminder of how broad ranging discovery in merger investigations can result in wholly unrelated conduct investigations and lawsuits. Third, one of the parties was a portfolio company of a private equity sponsor, highlighting how private investors can be targeted for antitrust violations. (more…)