Sergio Tomás Massa (Latin American Spanish pronunciation: [ˈseɾxjo ˈmasa] ⓘ; born 28 April 1972) is an Argentine politician who served as Minister of Economy from 2022 to 2023.

He also held the role of intendente (mayor) of Tigre twice and served as the Executive Director of ANSES, Argentina's decentralized state social insurance agency.

[5] Shortly after a crisis led to President Fernando de la Rúa's December 2001 resignation, the Congress appointed Senator Eduardo Duhalde, a more traditional Peronist than Menem had been.

Acquainted with Massa through Restaurant Workers' Union leader Luis Barrionuevo [es], Duhalde appointed him Director of the ANSeS (Argentina's Social Security administration).

The controversy helped lead to the 23 July resignation of Alberto Fernández, the president's Cabinet Chief, and to his replacement with Sergio Massa who, at 36, became the youngest person to hold the influential post since its creation in 1994.

Massa had, moreover, harbored differences with the president over a number of policies, including the nationalization of loss-producing private pension funds, the use of the INDEC bureau to understate inflation data, and the vast regulatory powers granted to Commerce Secretary Guillermo Moreno.

[7] He was investigated along with other officials for the illegal retention of "repayments" of nonexistent loans from the pensions of about 17 thousand retired while he was director of the ANSES[8] In 2010, Massa joined a group of eight Buenos Aires Province mayors in calling for the establishment of local police departments independent of the Provincial Police;[9] this 'Group of 8' had become disaffected to varying degrees with the Kirchner government, and came to view Massa as presidential timber for a future date.

He was said by one of Ambassador Vilma Socorro Martínez's cables to have revealed details about working with former President Néstor Kirchner, stating that he was "a psychopath; a monster whose bully approach to politics shows his sense of inferiority."

[12] Upon the filing deadline on 22 June, however, Massa ultimately opted to form his own Frente Renovador ('Renewal Front') faction with the support of the 'Group of 8' Buenos Aires Province Mayors and others, notably former Argentine Industrial Union president José Ignacio de Mendiguren (recently an ally of Kirchner).

Javier Corradino was expelled from a campaign of Renewal Front's Malena Galmarini, Tigre City Council secretary for health policy and human development, and wife of Sergio Massa.

[19] Massa sought to appeal to centrist voters in an election disputed by the Peronist Daniel Scioli and the centre-right conservative Mauricio Macri, and focused his campaign on the fight against corruption, climate change, and development through renewable energy sources.

[23] Ahead of the 2019 general election, Massa made public his intention to once again run for President and launched "Alternativa Federal", a coalition with other non-Kirchnerist members of the Justicialist Party such as Miguel Ángel Pichetto and Juan Manuel Urtubey.

[26] During the COVID-19 pandemic and subsequent lockdown in Argentina, Massa's administration sought to lower the costs of parliamentary proceedings by suspending legislative aides and restricting mobility benefits for deputies.

The fusion of the three ministries led the media to dub Massa superministro ("super-minister"), a term that had previously been used to describe economy ministers in other governments such as Nicolás Dujovne and Domingo Cavallo.

[32] On 23 June 2023, Massa was announced as the presidential candidate of the new Unión por la Patria coalition, with Cabinet Chief Agustín Rossi as his running mate.