At Boeing's late April shareholder meeting in Chicago, 34.8% of shareholders voted for a measure to divide the role of Chairman and CEO, both of which are currently held by Dennis Muilenburg. Splitting leadership roles into standalone positions has long been a hotly debated corporate governance issue, and every year, a flurry of proposals appears during proxy season, few of which actually win. But in Boeing's case, considering this year's proposal gained almost 10 points more than the previous year's proposal, shareholders signaled that they're pretty worried about the level of oversight at the company.