ExxonMobil has been looking to buy renewable energy for delivery in Texas, according to people familiar with the matter. : (Bloomberg) -- Exxon Mobil Corp. has been looking to buy renewable energy for delivery in Texas, according to people familiar with the matter. The largest U.S. oil company sent out a request for proposals with a June 8 deadline, inviting solar or wind power suppliers to pitch contracts that would last 12, 15 or 20 years, according to a document obtained by Bloomberg and people with knowledge who asked not to be named discussing confidential matters.