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Foreign governments in U.S. courts

Petersen Energia Inversora, S.A.U. v. Republic

Updated Nov 12, 2026

In brief

Where it stands
Petition Pending

Awaiting an order on the petition

No decision timeline until the Court agrees to hear the case.

What it’s about
Petersen Energia and other investors say Argentina took control of YPF without making the tender offer its bylaws promised.
What's at stake
Whether these investors may pursue their claims against Argentina in U.S. federal court remains unresolved.

Summary: written with AI from the case record.

What it's about

They ask the Supreme Court to review whether Argentina can avoid U.S. federal court jurisdiction by requiring claims in its own courts, and whether courts should defer to Argentina’s first-time-on-appeal account of its law.

Argentina privatized state-owned oil company YPF in the 1990s and amended its bylaws to promise investors a tender offer if it later took the company back. Investors say Argentina took majority control in 2012 without making that offer.

The petition also asks whether Argentina can require claims against it to be brought in Argentine courts and whether courts should defer to its first-time-on-appeal account of its law.

Question presented

1. Whether a foreign sovereign can circumvent federal FSIA jurisdiction by requiring that certain claims against the sovereign must be brought in the sovereign’s own courts. 2. Whether a foreign sovereign is entitled to deference when it presents a self-serving account of its own law for the first time on appeal, notwithstanding ordinary principles of waiver and forfeiture.

What happens next

The Court’s next step is to decide whether to hear the petition. No oral argument or decision date is scheduled.

Documents

2

Docket activity

22
  • New analysis added

    Nov 12, 2026 · Court records

  • AI analysis generated: Case Briefing

    Nov 12, 2026 · Generated

  • Case data updated: summary, question_presented, generation_metadata

    Nov 12, 2026 · Court records

  • Case data updated: question_presented, extraction_metadata

    Nov 12, 2026 · Court records

  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

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  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

  • Case data updated: documents, description, document_url, proceeding_type

    Nov 2, 2026 · supremecourt.gov

Older entries are on the full docket.

Sources

Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.

Checked Nov 12, 2026Methodology

Court records and filings

Reporting and analysis