BlackRock Inc, Exxon's second-largest shareholder, joined the dissidents, as it will support three of Engine No. 1's nominees, Reuters reported on Tuesday. Exxon had fought to keep climate activists at bay, spending tens of millions of dollars on a high-profile PR campaign, agreeing to publish more details of its emissions and coming out in support of carbon reduction. Activists have said it is too little, too late, and that Exxon needs a less reactive strategy.