Reuters Saudi authorities released businessman Amr al-Dabbagh and two administrative advisers after more than a year in a crackdown on corruption that rocked investor confidence in the world's top oil exporter, Reuters reported.
Dabbagh is the Chairman and CEO of a family-owned group, as head of KIA's years of targeting foreign investment to the country.
The agency based its report on seven sources, who asked not to be named, and said that the other two released by the authorities are Hani Khoja and Sami al-Dhuheibi.
The two are the founders of Alixir, which was acquired in 2017 by McKinsey Consulting, which the Saudi government has contracted to help with economic and social reforms sought by Crown Prince Mohammed bin Salman to end the nation's dependence on oil revenues.
The agency said it had not been able to contact the three released. The Saudi government liaison center did not respond to the request for comment. The charges against them or the conditions for their release were unclear.
The Wall Street Journal was the first to release their release.
Dozens of princes, senior officials and businessmen were held at the Ritz-Carlton Hotel in Riyadh on orders of the crown prince in November 2017.
Most of those detained during the campaign were released within a few months after reaching compromises that authorities said would generate more than $ 100 billion. Some were reported to have been tortured, which the government denies.
Opponents denounced the campaign as a blackmail and a ploy to boost influence, and the Attorney General has not released new developments on the anti-corruption campaign for nearly a year.