Appellate and Supreme Court

Building on a century of success, Jenner & Block’s nationally recognized Appellate and Supreme Court practice proudly represents clients in their most important matters in the United States Supreme Court, federal courts of appeals, and State appellate courts across the country. Our lawyers handle cases ranging from high-profile disputes for major corporations to front-page social issues for organizations and individuals. In today’s increasingly complex and changing legal and regulatory environment, the need for wise, creative, and experienced appellate counsel has never been more important.

In addition to our work in the appellate courts, we also regularly represent clients in regulatory matters and other government-facing litigation that calls for sophisticated analysis and advocacy. Our appellate lawyers also collaborate closely with trial lawyers to develop legal strategies early in a case that can secure a win. By staying ahead of—and helping to shape—emerging issues, we help clients navigate changes in the federal and state regulatory landscape and develop successful long-term business strategies. We also have an extensive practice representing clients as amici curiae in matters of importance.

A Leading Appellate and Supreme Court Practice

Jenner & Block stands out as a preeminent Appellate and Supreme Court Practice. We are regularly featured on The National Law Journal’s “Appellate Hot List” and have been named a “Practice Group of the Year” several times by Law360. Our Appellate and Supreme Court Practice and individual lawyers have also been consistently recognized in Chambers USA as being among the nation’s leading appellate law practices.

Deep Bench of Diverse Advocates and Perspectives

Led by former Acting Solicitor General Ian Heath Gershengorn, Jenner & Block’s appellate lawyers are creative, collegial, and successful in advocating on behalf of our clients. We have lawyers with experience in state and federal governments as well as private practice. Our depth of talent and our diversity reflects the multitudes of cultures and communities for which we advocate. And we have a deep bench. Six different Jenner & Block lawyers have argued before the US Supreme Court in the last four Terms alone, addressing issues of voting rights, tribal sovereignty, death penalty procedures, social security, and the tax code. We bring diverse perspectives to cases addressing the country’s most pressing business and social issues.

Navigating Appellate and Regulatory Litigation

Clients benefit from our strategic thinking to prepare for the possibility of litigation, a government action, or a Congressional hearing. We work collaboratively with trial teams, clients, and co-counsel to support difficult cases in district court litigation and on appeal. We have particular strength in government-facing litigation, and advising and advocating for clients and industry groups in heavily regulated sectors. Our lawyers have deep sector experience, to better address the legal issues our clients face now and those coming around the corner—both in private and government-facing litigation.

Strategic Advising on Emerging Issues

In-house legal teams at leading corporations, lawyer associations, top law schools, and emerging tech companies rely on Jenner & Block for our insights on key developments related to US Supreme Court cases to help identify challenges and opportunities for their industry, practice, and businesses. Our team is involved in—or actively monitoring—all developments at the Supreme Court and proactively works with clients to break down complex issues happening outside of their own industry to better anticipate the legal implications, potential for challenge, and opportunities for business or policy initiatives.

  • Obtained a Seventh Circuit ruling affirming an Illinois federal court decision dismissing all claims against Cboe Global Markets, Inc. in an investor suit over Cboe’s alleged failure to prevent manipulation of its volatility index.
  • Secured a US Supreme Court win for an inmate challenging Georgia’s execution method, ensuring litigants can challenge cruel and unusual methods of execution. Our client is the first litigant to prevail in the Supreme Court on an execution method claim in more than 15 years.
  • Secured back-to-back appellate wins in a dispute over Native American gaming on behalf of the Cayuga Nation when a Second Circuit panel unanimously ruled in its favor in July 2021 and the US Supreme Court subsequently denied a New York village’s cert petition in a gaming rights dispute.
  • Defeated antitrust claims in a lawsuit alleging medical supply price fixing in the US Court of Appeals for the Seventh Circuit on behalf of McKesson.
  • Represent Native American tribes before the US Supreme Court in Haaland v. Brackeen. Our team is defending the constitutionality of the Indian Child Welfare Act.
  • Won a victory on behalf of the North Carolina League of Conservation Voters and others when the North Carolina Supreme Court held that the state constitution prohibits partisan gerrymandering. This win guaranteed that the 2022 congressional elections were held under fair maps in North Carolina. The case is now on appeal to the US Supreme Court.
  • Secured a victory for the Cayuga Nation when the Second Circuit agreed with a lower court that federal law blocked the village of Union Springs from enforcing its anti-gambling ordinance on the reservation.

  • Represent Detroit casinos in a case before the DC Circuit regarding the Sault Ste. Marie Tribe of Chippewa Indians’ efforts to purchase land for a new casino.

Experience

  • Obtained a Seventh Circuit ruling affirming an Illinois federal court decision dismissing all claims against Cboe Global Markets, Inc. in an investor suit over Cboe’s alleged failure to prevent manipulation of its volatility index.
  • Secured a US Supreme Court win for an inmate challenging Georgia’s execution method, ensuring litigants can challenge cruel and unusual methods of execution. Our client is the first litigant to prevail in the Supreme Court on an execution method claim in more than 15 years.
  • Secured back-to-back appellate wins in a dispute over Native American gaming on behalf of the Cayuga Nation when a Second Circuit panel unanimously ruled in its favor in July 2021 and the US Supreme Court subsequently denied a New York village’s cert petition in a gaming rights dispute.
  • Defeated antitrust claims in a lawsuit alleging medical supply price fixing in the US Court of Appeals for the Seventh Circuit on behalf of McKesson.
  • Represent Native American tribes before the US Supreme Court in Haaland v. Brackeen. Our team is defending the constitutionality of the Indian Child Welfare Act.
  • Won a victory on behalf of the North Carolina League of Conservation Voters and others when the North Carolina Supreme Court held that the state constitution prohibits partisan gerrymandering. This win guaranteed that the 2022 congressional elections were held under fair maps in North Carolina. The case is now on appeal to the US Supreme Court.
  • Secured a victory for the Cayuga Nation when the Second Circuit agreed with a lower court that federal law blocked the village of Union Springs from enforcing its anti-gambling ordinance on the reservation.

  • Represent Detroit casinos in a case before the DC Circuit regarding the Sault Ste. Marie Tribe of Chippewa Indians’ efforts to purchase land for a new casino.

Appellate and Supreme Court

Building on a century of success, Jenner & Block’s nationally recognized Appellate and Supreme Court practice proudly represents clients in their most important matters in the United States Supreme Court, federal courts of appeals, and State appellate courts across the country. Our lawyers handle cases ranging from high-profile disputes for major corporations to front-page social issues for organizations and individuals. In today’s increasingly complex and changing legal and regulatory environment, the need for wise, creative, and experienced appellate counsel has never been more important.

In addition to our work in the appellate courts, we also regularly represent clients in regulatory matters and other government-facing litigation that calls for sophisticated analysis and advocacy. Our appellate lawyers also collaborate closely with trial lawyers to develop legal strategies early in a case that can secure a win. By staying ahead of—and helping to shape—emerging issues, we help clients navigate changes in the federal and state regulatory landscape and develop successful long-term business strategies. We also have an extensive practice representing clients as amici curiae in matters of importance.

A Leading Appellate and Supreme Court Practice

Jenner & Block stands out as a preeminent Appellate and Supreme Court Practice. We are regularly featured on The National Law Journal’s “Appellate Hot List” and have been named a “Practice Group of the Year” several times by Law360. Our Appellate and Supreme Court Practice and individual lawyers have also been consistently recognized in Chambers USA as being among the nation’s leading appellate law practices.

Deep Bench of Diverse Advocates and Perspectives

Led by former Acting Solicitor General Ian Heath Gershengorn, Jenner & Block’s appellate lawyers are creative, collegial, and successful in advocating on behalf of our clients. We have lawyers with experience in state and federal governments as well as private practice. Our depth of talent and our diversity reflects the multitudes of cultures and communities for which we advocate. And we have a deep bench. Six different Jenner & Block lawyers have argued before the US Supreme Court in the last four Terms alone, addressing issues of voting rights, tribal sovereignty, death penalty procedures, social security, and the tax code. We bring diverse perspectives to cases addressing the country’s most pressing business and social issues.

Navigating Appellate and Regulatory Litigation

Clients benefit from our strategic thinking to prepare for the possibility of litigation, a government action, or a Congressional hearing. We work collaboratively with trial teams, clients, and co-counsel to support difficult cases in district court litigation and on appeal. We have particular strength in government-facing litigation, and advising and advocating for clients and industry groups in heavily regulated sectors. Our lawyers have deep sector experience, to better address the legal issues our clients face now and those coming around the corner—both in private and government-facing litigation.

Strategic Advising on Emerging Issues

In-house legal teams at leading corporations, lawyer associations, top law schools, and emerging tech companies rely on Jenner & Block for our insights on key developments related to US Supreme Court cases to help identify challenges and opportunities for their industry, practice, and businesses. Our team is involved in—or actively monitoring—all developments at the Supreme Court and proactively works with clients to break down complex issues happening outside of their own industry to better anticipate the legal implications, potential for challenge, and opportunities for business or policy initiatives.

  • Obtained a Seventh Circuit ruling affirming an Illinois federal court decision dismissing all claims against Cboe Global Markets, Inc. in an investor suit over Cboe’s alleged failure to prevent manipulation of its volatility index.
  • Secured a US Supreme Court win for an inmate challenging Georgia’s execution method, ensuring litigants can challenge cruel and unusual methods of execution. Our client is the first litigant to prevail in the Supreme Court on an execution method claim in more than 15 years.
  • Secured back-to-back appellate wins in a dispute over Native American gaming on behalf of the Cayuga Nation when a Second Circuit panel unanimously ruled in its favor in July 2021 and the US Supreme Court subsequently denied a New York village’s cert petition in a gaming rights dispute.
  • Defeated antitrust claims in a lawsuit alleging medical supply price fixing in the US Court of Appeals for the Seventh Circuit on behalf of McKesson.
  • Represent Native American tribes before the US Supreme Court in Haaland v. Brackeen. Our team is defending the constitutionality of the Indian Child Welfare Act.
  • Won a victory on behalf of the North Carolina League of Conservation Voters and others when the North Carolina Supreme Court held that the state constitution prohibits partisan gerrymandering. This win guaranteed that the 2022 congressional elections were held under fair maps in North Carolina. The case is now on appeal to the US Supreme Court.
  • Secured a victory for the Cayuga Nation when the Second Circuit agreed with a lower court that federal law blocked the village of Union Springs from enforcing its anti-gambling ordinance on the reservation.

  • Represent Detroit casinos in a case before the DC Circuit regarding the Sault Ste. Marie Tribe of Chippewa Indians’ efforts to purchase land for a new casino.

Experience

  • Obtained a Seventh Circuit ruling affirming an Illinois federal court decision dismissing all claims against Cboe Global Markets, Inc. in an investor suit over Cboe’s alleged failure to prevent manipulation of its volatility index.
  • Secured a US Supreme Court win for an inmate challenging Georgia’s execution method, ensuring litigants can challenge cruel and unusual methods of execution. Our client is the first litigant to prevail in the Supreme Court on an execution method claim in more than 15 years.
  • Secured back-to-back appellate wins in a dispute over Native American gaming on behalf of the Cayuga Nation when a Second Circuit panel unanimously ruled in its favor in July 2021 and the US Supreme Court subsequently denied a New York village’s cert petition in a gaming rights dispute.
  • Defeated antitrust claims in a lawsuit alleging medical supply price fixing in the US Court of Appeals for the Seventh Circuit on behalf of McKesson.
  • Represent Native American tribes before the US Supreme Court in Haaland v. Brackeen. Our team is defending the constitutionality of the Indian Child Welfare Act.
  • Won a victory on behalf of the North Carolina League of Conservation Voters and others when the North Carolina Supreme Court held that the state constitution prohibits partisan gerrymandering. This win guaranteed that the 2022 congressional elections were held under fair maps in North Carolina. The case is now on appeal to the US Supreme Court.
  • Secured a victory for the Cayuga Nation when the Second Circuit agreed with a lower court that federal law blocked the village of Union Springs from enforcing its anti-gambling ordinance on the reservation.

  • Represent Detroit casinos in a case before the DC Circuit regarding the Sault Ste. Marie Tribe of Chippewa Indians’ efforts to purchase land for a new casino.

News and Insights

Event

Partner Annie Kastanek to Speak at Seventh Circuit Bar Association’s 2026 Annual Meeting and Conference

On May 4, Partner Annie Kastanek will speak on a panel at the Seventh Circuit Bar Association’s 2026 Annual Meeting and Conference at the Radisson Blu Aqua Hotel in Chicago.

May 4, 2026