U.S. District Judge Lewis Kaplan in Manhattan ruled in favor of several media outlets including Reuters that sought the names.
The judge said that while the public had only a "weak" right to know who Bankman-Fried's guarantors were, it outweighed Bankman-Fried's arguments for confidentiality, including that the guarantors' safety could be imperiled.
Kaplan disagreed, noting that long before bail was posted, the parents had faced "intense public scrutiny" over their relationship with their son, who was once worth an estimated $26 billion.
They said there was less "stigma" from being associated with Bankman-Fried than from being associated with the late sex offender.
Other media seeking to identify Bankman-Fried's guarantors included the Associated Press, Bloomberg, CNBC, CoinDesk, Dow Jones, the Financial Times, Insider, the New York Times and the Washington Post.