Leon Black Sues House Oversight Committee to Block Epstein Subpoena

A federal lawsuit filed by a former private equity CEO creates a direct legal test of Congress's subpoena power in the ongoing Epstein investigation.

Leon Black, the 75-year-old former chief executive of Apollo Global Management, filed a federal lawsuit on September 3, 2026, against the House Oversight Committee, seeking to invalidate a congressional subpoena requiring his testimony in connection with the committee's investigation into Jeffrey Epstein, according to reporting by the New York Post.

Black's lawsuit argues that the subpoena is "invalid" and that the inquiry "bears no legitimate connection to a legislative purpose," according to the Post. That framing mirrors the legal standard established in McGrain v. Daugherty (1927), in which the Supreme Court held that congressional subpoenas must serve a legitimate legislative function to be enforceable.

The legal action centers in part on a nondisclosure agreement, the terms of which have not been made public in available reporting. What document or court filing would reveal those terms is the sealed NDA itself, which has not been entered into the public record as of the date of this report.

Black stepped down as CEO of Apollo Global Management in 2021. At that time, an independent review commissioned by the firm found that Black had directed approximately $158 million in payments to Jeffrey Epstein for financial advisory services between 2012 and 2017, according to the New York Post report. Apollo Global Management is a publicly traded alternative asset management firm. Black's departure followed internal and public scrutiny over those disclosed payments.

Epstein died in a Manhattan federal detention facility in August 2019 while awaiting trial on federal sex trafficking charges. The medical examiner ruled the death a suicide. Congressional interest in individuals who had documented financial or personal ties to Epstein has continued across multiple committee investigations in the years since.

The House Oversight Committee is chaired by Republicans in the current Congress. Committee subpoenas require a majority vote or, in some cases, can be issued by the chair under rules adopted at the start of a Congress. The specific procedural mechanism by which this subpoena was issued, including whether it was a full committee vote or a chair-issued subpoena, is not specified in currently available public reporting. That information would be contained in the committee's official subpoena authorization records, which are public documents maintained by the House.

Black's lawsuit represents one of the more direct legal challenges to congressional subpoena authority in recent memory. Courts have generally upheld broad congressional investigative powers, but have also recognized limits where the nexus to a legislative purpose is weak. The Supreme Court's 2020 decision in Trump v. Mazars USA established a four-factor balancing test courts apply when a subpoena target challenges a congressional demand as lacking legislative justification.

Applying the Mazars framework, a reviewing court would weigh whether the committee's stated legislative purpose is genuine, whether the specific information sought is necessary to that purpose, whether the demand is no broader than necessary, and whether issuing the subpoena would create significant separation-of-powers concerns. Black's suit appears designed to contest the first factor directly.

Black's current net worth is listed by Forbes at approximately $10 billion, making him one of the wealthiest individuals to directly challenge a congressional subpoena through litigation rather than compliance or negotiation.

What remains unknown is the precise scope of testimony the committee is seeking, the full text of the subpoena, and the identity of any other individuals who have received or complied with similar demands in this investigation. The subpoena itself, the committee's authorizing resolution, and any accompanying correspondence would be the public records that would answer those questions. The case has been filed in federal court, and a docket number had not been confirmed in available sources as of September 3, 2026.