This educational guide is based on the linked primary sources. It is not a Court publication, is not affiliated with the Court, and is not legal advice.
In brief
Overview
The case involves Grupo Dataflux (petitioner) and Atlas Global Group (respondent).
The dispute concerns whether the lack of complete diversity between the parties was cured before trial, affecting subject‑matter jurisdiction.
Background and question before the Court
Dataflux filed a second suit in December 2000, which was dismissed around October 2001.
The central legal question is whether the lack of complete diversity can be cured before trial to confer subject‑matter jurisdiction.
What each side argues
Petitioner (Grupo Dataflux) Position
According to Grupo Dataflux (Petitioner), according to Grupo Dataflux (Petitioner), dataflux acknowledges early confusion about the parties' status and admits it did not thoroughly explore the issue.
Respondent (Atlas Global Group) Position
According to Respondent, atlas asks the Court to affirm the Fifth Circuit judgment, arguing the trial court had subject‑matter jurisdiction because the lack of complete diversity was cured before trial.
According to Respondent, atlas relies on the Fifth Circuit rule and the Caterpillar precedent to support its argument.
According to Atlas, atlas cites Anderson v. Watt, applying Mollan and Conolly, to anchor its argument in the 1875 iteration of the diversity statute.
What happened at oral argument
According to Chief Justice Rehnquist, chief Justice Rehnquist announced the hearing of argument for No. 02-1689, Grupo Dataflux v. Atlas Global Group.
Justice Ginsburg asked about Dataflux adding Mexican individuals as counterdefendants.
According to Justice, a justice inquired about the date of Anderson, suggesting 1891.
According to Justice Stevens, justice Stevens questioned whether a bright‑line rule should determine the timing of jurisdictional objections, comparing trial‑court verdict timing to final appellate judgment.
What the Court decided
Why it matters
Terms to know
- partner citizenship
- Each partner's citizenship counts equally for purposes of determining complete diversity, unlike a corporation where the corporation's citizenship is considered.
Primary sources
Read the source materials on the official site or open the immutable repository copy used for this guide.
- 89b2e8e94ab97f247ef4-r1-08e6a25ba0defcc0.pdforal argument transcript
Guide generated September 20, 2026. Automated validation accepted this version.