Baumann suffers defeat with 55% of shareholders in opposition. : Bayer AG’s supervisory board threw its support behind Chief Executive Officer Werner Baumann after an unprecedented shareholder rebuke over his handling of the $63 billion Monsanto deal and the wave of US lawsuits that followed. At a fractious, 13-hour Annual General Meeting earlier in Bonn, 55.5 percent of shareholders voted against absolving Baumann and other managers of responsibility for their actions in the takeover last year.