Daniel Valente Dantas (Salvador, October 3, 1954) is a Brazilian banker and businessman, founder of the Banco Opportunity, an institution specialized in asset management.

Later, he obtained a master's degree and a doctorate at FGV and completed post-doctorate studies at the Massachusetts Institute of Technology (MIT) in the United States.

In addition to his financial activities, Dantas is one of the largest agricultural landowners in Brazil, controlling companies in the oil, mining, biofuels, and agribusiness sectors.

The Brazilian National Institute of Criminology (INC) tried for five months without success to obtain access to his TrueCrypt-protected disks, after which they enlisted the help of the FBI.

[11] On June 7, 2011, the National Council of Justice (CNJ) unanimously recognized that Judge Fausto de Sanctis, at the time the head judge of the 6th Criminal Court of São Paulo, intentionally disobeyed the orders of the Federal Supreme Court (STF), when he ordered the detention of Dantas in Operation Satyagraha.

Also on June 7, 2011, the Higher Court of Justice (STJ) accepted the opinion of the Federal Public Prosecutor's Office and voided the criminal action originating from Operation Satyagraha, for its irregularities.

According to the President of the 5th Bench of the Higher Court of Justice, Jorge Mussi, "the involvement of ABIN (Brazilian Intelligence Agency) was demonstrated in a document in which the Federal Police ordered the internal investigation of irregularities in the operation".