Roberto Irineu Marinho is a Brazilian businessman who has an estimated net worth of $4.8 billion as of January 2016, according to Forbes.

Since 1978, Marinho served as Globo TV Network's Executive Vice President. He is the Co-Chairman and Executive Vice President of Organizagoes Globo. He also became the director for O Globo Newspaper until 1998. After his father Roberto's death in 2003, he and his brothers inherited Grupo Globo, Brazil's largest media group.

Born on October 13, 1947 in Rio de Janeiro, Brazil, Marinho is married with four children. He is a graduate of Fundação Getúlio Vargas and took up Bachelor's Degree in Business Administration.