No, the Rockefeller family does not own ExxonMobil, though the energy giant is the direct corporate descendant of Standard Oil of New Jersey, which was the core anchor of the original Rockefeller monopoly. Over generations, through antitrust dissolutions, estate distributions, philanthropic gifts, and portfolio diversification, the family's individual and collective shareholdings in the resulting successor corporations diminished to minor fractions. Modern ExxonMobil is a massive, publicly traded multinational enterprise owned by millions of institutional and retail shareholders worldwide.