Norway's sovereign wealth fund announced its intention to oppose ratification of Elon Musk's proposed compensation package, which could reach $US1 trillion.
The fund, the largest in the world, owns the seventh-largest stake in Tesla and is the most prominent shareholder to declare its voting stance ahead of the upcoming meeting.
The crucial vote will occur on November 6, when investors decide whether to approve what might become the biggest CEO compensation deal ever.
Critics argue that the pay package is excessive, but the proposal has strong support from Tesla's board, which encourages shareholders to accept it.
The world's largest sovereign fund opposes Elon Musk's historic compensation plan, highlighting ongoing tensions over executive pay and corporate governance at Tesla.