João Roberto Marinho is a Brazilian businessman, the billionaire Chairman of the Board and Chairman of the Editorial and Institutional Committee of Grupo Globo, the largest media and entertainment conglomerate in Latin America. Born in Rio de Janeiro, in 1953, he is the third of four children of the late media tycoon, Roberto Marinho (d. 2003), who founded the Globo Organizations.

Marinho's career began with hands-on work in the family business: he started working at the 'O Globo' newspaper in 1973 in the general reporting team. His structural role is tied to the generational transition and maintenance of family control over the massive media enterprise (which distributes programming to 160 territories in 70 languages).

• Grupo Globo (Chairman of the Board): The core private asset, the largest media and entertainment conglomerate in Latin America (controlling TV Globo, O Globo newspaper, etc.).
• Family Governance: He, along with his brothers Roberto Irineu Marinho (Vice President of the Board) and José Roberto Marinho, manage the empire.
• Journalistic Heritage: He began his career as a journalist for the O Globo newspaper in 1973.
• Cultural Significance: Grupo Globo was officially declared an Intangible Cultural Heritage of the City of Rio de Janeiro (recognizing its role in promoting Brazilian culture).

João Roberto Marinho's strategic leadership guided Grupo Globo through the digital age, emphasizing quality production, social responsibility, and independent journalism. He rose through the editorial ranks, becoming Vice President of O Globo in 1982 and later assuming overall leadership alongside his brothers in the mid-1990s.

He served as Vice-President of the Board (2003–2020) before becoming Chairman of the Board in 2021. His immense wealth is secured by the colossal, long-term, stable profitability of the dominant Latin American media and broadcasting sector. His structural contribution is immense: he will receive the 2025 International Emmy® Directorate Award in November 2025, recognizing his career in reinforcing the Group's commitment to quality production and independent journalism.

João Roberto Marinho's social impact is massive and structural, tied to Grupo Globo's role as the dominant media voice in Brazil, fundamentally shaping public opinion and disseminating information (reaching 160 territories in 70 languages). He chairs the Social Responsibility Committee of Grupo Globo, advancing social welfare and community initiatives.

His structural contribution is tied to the successful generational transition and long-term private control of this essential national media asset. He is also an acclaimed amateur equestrian (winning the Brazilian team championship in 2010).

João Roberto Marinho maintains the professional, composed style of a media executive. His attire is consistently formal and high-quality, favoring tailored suits. His aesthetic reflects stability and immense corporate authority, typical of a leader in Latin American media.

Residing in Rio de Janeiro, Brazil, his luxury is the immense security and financial reward derived from his multi-billion dollar fortune. His life is dedicated to media governance, journalistic integrity, and his passion for equestrianism.