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Investment fund fraud claims

Janus Capital Group v. First Derivative Traders

Updated Nov 3, 2026

In brief

The Supreme Court overturned the appeals court’s ruling: JCG and JCM could not be held legally responsible in a private lawsuit for prospectus statements the Fund made.

Where it stands
Decided

Decided 5-4 · June 13, 2011 · Opinion by Justice Thomas

What it’s about
The Supreme Court overturned the Fourth Circuit’s ruling, deciding that Janus Capital Group and Janus Capital Management could not be held liable in a private lawsuit under the federal securities-fraud rule (Rule 10b-5) for prospectus statements the Court found were made by Janus Investment Fund, not by Janus Capital Management.
Who it affects
JCG and JCM cannot be held legally responsible in a private Rule 10b-5 lawsuit for these prospectus statements because the Court said the Fund made them.

Summary: written with AI from the case record.

Illustration for Janus Capital Group, Inc. v. First Derivative Traders
Conceptual illustration · AI-generated

What it's about

JCM acted as an investment adviser to a family of mutual funds.

Question presented

1. Did the Fourth Circuit err in concluding that a service provider – in this case JCM – can be held liable in a private securities fraud action for "helping or participating in" another company's misstatements? 2. Did the Fourth Circuit err in concluding that a service provider – in this case JCM – can be held liable in a private securities fraud action for statements that were not directly and contemporaneously attributable to the service provider?

What the Court decided

Holding

Because the false statements included in the prospectuses were made by Janus Investment Fund, not by JCM, JCM and JCG cannot be held liable in a private action under Rule 10b–5. 566 F. 3d 111, reversed.

Result
Reversed

The Court's reasoning

The Court said the Janus Investment Fund, not JCM, made the prospectus statements. Because the statements were attributed to the Fund, it ruled that JCM and JCG could not be held legally responsible for them in a private Rule 10b-5 lawsuit.

The vote

  • Joined the judgment
  • Dissented
  • Wrote an opinion
Majority · 5joined the Court's opinion
  1. Thomaswrote the opinion
  2. Scalia
  3. Kennedy
  4. Roberts
  5. Alito
Dissenting · 4disagreed with the result
  1. Breyerwrote the dissent
  2. Kagan
  3. Ginsburg
  4. Sotomayor
5 justices joined the judgment, 4 dissented.

From the opinions

“Janus Management prepares, modifies, and implements the Janus Fund’s long-term strategies.”

— Justice Breyer(dissent)

What's next

Lower courts applying the ruling must follow its conclusion that the Janus Investment Fund, not JCM, made the challenged prospectus statements.

Documents

2

Opinions

Audio

View the full docket on supremecourt.gov

Docket activity

10
  • New analysis added

    Nov 3, 2026 · Court records

  • AI analysis generated: Case Briefing

    Nov 3, 2026 · Generated

  • New analysis added

    Nov 3, 2026 · Court records

  • AI analysis generated: Impact Analysis

    Nov 3, 2026 · Generated

  • AI analysis generated: Opinion Summary

    Nov 3, 2026 · Generated

Show 5 more
  • AI analysis generated: Decision Record

    Nov 3, 2026 · Generated

  • Case data updated: summary, question_presented, generation_metadata

    Nov 3, 2026 · Court records

  • Case data updated: question_presented, extraction_metadata

    Oct 17, 2026 · Court records

  • Audio Recording added: Oral Arguments - Janus Capital Group, Inc. v. First Derivative Traders

    Oct 30, 2014 · Court records

  • Opinion added: Janus Capital

    Jun 13, 2011 · Court records

More questions

3
What did investors allege JCM did?
They alleged that JCM knowingly made materially false or misleading statements in the Fund’s prospectuses.
What harm did investors say they suffered?
They said they relied on the statements and suffered economic harm.
Who worked as officers of the Janus Fund?
Justice Breyer’s opinion said each Fund officer was a JCM employee.

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 3, 2026Methodology

Court records and filings

Reporting and analysis