Change to Win Investment Group, the investment arm of one of the US union centres, is campaigning for a vote against the executive compensation policy at Oracle, along with votes against several directors who sit on the comp committee. Bloomberg piece here, and the full CtW letter here.
Worth noting that Oracle lost its 'say on pay' vote last year, which inexplicably didn't really seem to attract any media coverage. Larry Ellison's personal stake in the business adds to the normal hurdles you need to get over in order to record a large vote against, let alone a defeat.
CtW have a good track record this year, and were closely involved in successful action to challenge ineffective board members at both HP and JP Morgan. They are a great example of what unions can achieve in when they get active in capital market campaigns.