October Term 2003 · Docket 02-1689

Does a post-filing citizenship change create retroactive diversity jurisdiction?

The dispute centers on whether a party's later change in citizenship cures a prior lack of complete diversity.

Official caption
Grupo Dataflux v. Atlas Global Group
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Mr. Boyce argued that Atlas' post-filing citizenship change should not create retroactive jurisdiction.

    Mr. Greenberg argued that the trial court had jurisdiction because diversity existed at trial.

    chief_justice_rehnquist

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

This case tests the timing of diversity jurisdiction. One side argues jurisdiction exists if diversity is present at trial. The other side argues jurisdiction must exist at filing.

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How the case got here

The Supreme Court heard oral argument in this case on March 3, 2004.

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What each side wants

Atlas wants the Court to affirm the Fifth Circuit judgment.

Atlas wants the Court to hold that the trial court had jurisdiction at trial.

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What each side says

Atlas argues that a post-filing citizenship change cures the lack of complete diversity.

Dataflux argues that a post-filing citizenship change cannot create retroactive diversity jurisdiction.

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What the justices asked

Chief Justice Rehnquist asked if the case was submitted.

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Why it matters

This case defines when federal courts gain diversity jurisdiction. It determines whether parties can cure jurisdictional defects after filing. It affects access to federal courts for diverse parties.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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