Chevron Corp. shareholders on May 27 voted to approve a proposal demanding that the company issue a report on its climate change related lobbying activities, a major win for activists against big oil.

Other shareholder proposals were defeated, including one calling on the U.S. oil producer to split its chairman and chief executive roles that received only around 27% votes in favor.

Rival Exxon Mobil Corp.'s shareholders on May 27 also rejected calls to split the chair and CEO roles along with all other climate-related proposals.