Umut Güner detained in Istanbul fund investigation
The owner of Dünya newspaper was taken into custody as part of a capital markets probe involving 131 investment funds.

KEY POINTS
- Umut Güner, owner of Dünya newspaper, was detained in Istanbul
- The detention is part of a fund investigation into capital market transactions
- Bulls Investment Holding owns 20.45 percent of Dünya Holding
- The Capital Markets Board ordered the liquidation of 131 investment funds
- 120 people were detained in the investigation as of October 31
Umut Güner, the owner of Dünya newspaper, was detained by the Istanbul Chief Public Prosecutor's Office as part of an ongoing fund investigation into capital market transactions.
The investigation focuses on alleged abnormal price movements in certain stocks and investment funds. Güner's detention is linked to the capital partnership between Dünya Holding and Bulls Investment Holding.
“membership in an organization established to commit a crime and bribery”
Bulls Investment Holding holds a 20.45 percent stake in Dünya Holding. The Capital Markets Board previously decided to liquidate 131 investment funds, including 15 established by Bulls Portfolio.
Güner acquired the publishing rights of Dünya from Didem Demirkent on January 26, 2024. The 51-year-old businessman previously served as vice president and head of the Transfer Committee at Beşiktaş during Fikret Orman's presidency.
The fund investigation began on August 19, 2026, after the prosecutor's office requested information and documents from the Capital Markets Board. As of October 31, there were 120 detainees in the case.
Other recent developments include the detention of Borsa Istanbul General Manager Korkmaz Enes Ergun on charges of membership in an organization established to commit a crime and bribery. Arrest warrants were also issued for Tera manager Hakan Gövdere and Ral Investment Holding board chairman Rıza Kandemir.
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