Hannah L. Dwyer handles complex litigation, primarily in the areas of antitrust, general commercial and securities litigation.
Ms. Dwyer’s clients have included 260 Twelfth Avenue Holdings, the Blue Cross Blue Shield Association and various member plans, Light & Wonder (formerly Scientific Games Corporation), Louis Dreyfus Company, Micro Focus, Morgan Stanley and Viatris.
Ms. Dwyer’s notable representations include:
- Representing the Blue Cross Blue Shield Association (“BCBSA”) and more than a dozen member plans in consolidated multidistrict antitrust class action litigation—one of the largest class actions in the country—brought by putative classes of healthcare providers and health insurance subscribers alleging that the Association and its members have used the Association’s agreements to fix prices and limit competition. She also represents BCBSA and various member plans in related opt‑out litigation across the country brought by large self‑funded subscribers and providers.
- Represented Micro Focus International (now OpenText) and certain officers in securing a favorable settlement in putative securities class action litigation in California state court and New York federal court concerning its $8.8 billion acquisition of certain of Hewlett Packard Enterprise’s software assets.
- Represented Louis Dreyfus Company and its subsidiary Imperial Sugar Company in an action brought by the Department of Justice (DOJ) in Delaware federal court seeking to enjoin U.S. Sugar’s proposed acquisition of Imperial Sugar from Louis Dreyfus. The court ruled in favor of the defendants, denying the DOJ’s request for an injunction to block the acquisition, and the Third Circuit unanimously affirmed the ruling.
- Represented 260 Twelfth Avenue Holdings LLC and other stakeholders in litigation to obtain just compensation for the taking of property through eminent domain by the National Railroad Passenger Corporation (Amtrak) in connection with the Hudson Tunnel Project in New York City. The parties reached a settlement shortly before a scheduled trial.
- Represented Morgan Stanley in litigation filed by Moby S.p.A., an Italian shipping company, in New York state court alleging tortious interference with Moby’s business relations, which ultimately resulted in Morgan Stanley obtaining a complete dismissal with prejudice of the action.
- Represented Viatris (formerly Mylan) in a shareholder class action that asserted numerous violations of the federal securities laws, all premised on other allegations related to Mylan’s marketing, pricing and classification of EpiPen, as well as alleged conduct concerning generic drug price‑fixing and market allocation. The court granted summary judgment entirely in favor of defendants, and the decision was affirmed on appeal by the Second Circuit.
Ms. Dwyer received a B.B.A. from the University of Notre Dame in 2013 and a J.D. with honors from The University of Texas School of Law in 2018, where she was an associate editor of the Law Review.
Ms. Dwyer was born in Glenside, Pennsylvania. She joined Cravath in 2018. From 2020 to 2021, Ms. Dwyer served as a law clerk to Hon. Mark A. Kearney of the U.S. District Court for the Eastern District of Pennsylvania. She rejoined Cravath from 2021 to 2023 and, following her time at another law firm in New York, returned to the Firm in 2024. Ms. Dwyer was elected a partner in 2025.
Ms. Dwyer’s clients have included 260 Twelfth Avenue Holdings, the Blue Cross Blue Shield Association and various member plans, Light & Wonder (formerly Scientific Games Corporation), Louis Dreyfus Company, Micro Focus, Morgan Stanley and Viatris.
Ms. Dwyer’s notable representations include:
- Representing the Blue Cross Blue Shield Association (“BCBSA”) and more than a dozen member plans in consolidated multidistrict antitrust class action litigation—one of the largest class actions in the country—brought by putative classes of healthcare providers and health insurance subscribers alleging that the Association and its members have used the Association’s agreements to fix prices and limit competition. She also represents BCBSA and various member plans in related opt‑out litigation across the country brought by large self‑funded subscribers and providers.
- Represented Micro Focus International (now OpenText) and certain officers in securing a favorable settlement in putative securities class action litigation in California state court and New York federal court concerning its $8.8 billion acquisition of certain of Hewlett Packard Enterprise’s software assets.
- Represented Louis Dreyfus Company and its subsidiary Imperial Sugar Company in an action brought by the Department of Justice (DOJ) in Delaware federal court seeking to enjoin U.S. Sugar’s proposed acquisition of Imperial Sugar from Louis Dreyfus. The court ruled in favor of the defendants, denying the DOJ’s request for an injunction to block the acquisition, and the Third Circuit unanimously affirmed the ruling.
- Represented 260 Twelfth Avenue Holdings LLC and other stakeholders in litigation to obtain just compensation for the taking of property through eminent domain by the National Railroad Passenger Corporation (Amtrak) in connection with the Hudson Tunnel Project in New York City. The parties reached a settlement shortly before a scheduled trial.
- Represented Morgan Stanley in litigation filed by Moby S.p.A., an Italian shipping company, in New York state court alleging tortious interference with Moby’s business relations, which ultimately resulted in Morgan Stanley obtaining a complete dismissal with prejudice of the action.
- Represented Viatris (formerly Mylan) in a shareholder class action that asserted numerous violations of the federal securities laws, all premised on other allegations related to Mylan’s marketing, pricing and classification of EpiPen, as well as alleged conduct concerning generic drug price‑fixing and market allocation. The court granted summary judgment entirely in favor of defendants, and the decision was affirmed on appeal by the Second Circuit.
Ms. Dwyer received a B.B.A. from the University of Notre Dame in 2013 and a J.D. with honors from The University of Texas School of Law in 2018, where she was an associate editor of the Law Review.
Ms. Dwyer was born in Glenside, Pennsylvania. She joined Cravath in 2018. From 2020 to 2021, Ms. Dwyer served as a law clerk to Hon. Mark A. Kearney of the U.S. District Court for the Eastern District of Pennsylvania. She rejoined Cravath from 2021 to 2023 and, following her time at another law firm in New York, returned to the Firm in 2024. Ms. Dwyer was elected a partner in 2025.
Education
-
J.D., 2018, The University of Texas School of Lawcum laude
-
B.B.A., 2013, University of Notre Dame
Clerkships
- Hon. Mark Kearney, U.S.D.C. for the Eastern District of Pennsylvania
Admitted In
- New York
Firm News
November 20, 2025
Cravath Announces New Partners and Of Counsels
Cravath has elected the following new partners, who will become members of the Firm on January 1, 2026:
Activities
February 11, 2025
Cravath Lawyers Lead Workshop at Jacksonville University College of Law
On January 31, 2025, Cravath lawyers Karin A. DeMasi, Minh Van Ngo and Hannah L. Dwyer led an all‑day workshop for first-, second- and third‑year students at the Jacksonville University College of Law. The workshop’s morning sessions provided an overview of the types and stages of litigation, from investigation to appeal, and the core skills of successful litigators, as well as the types of corporate law and the anatomy of a deal. The afternoon consisted of a discussion on professionalism, a Q&A session and networking. The Firm previously led the workshop for the Jacksonville University College of Law’s inaugural class in 2023.
Hannah L. Dwyer handles complex litigation, primarily in the areas of antitrust, general commercial and securities litigation.
Ms. Dwyer’s clients have included 260 Twelfth Avenue Holdings, the Blue Cross Blue Shield Association and various member plans, Light & Wonder (formerly Scientific Games Corporation), Louis Dreyfus Company, Micro Focus, Morgan Stanley and Viatris.
Ms. Dwyer’s notable representations include:
- Representing the Blue Cross Blue Shield Association (“BCBSA”) and more than a dozen member plans in consolidated multidistrict antitrust class action litigation—one of the largest class actions in the country—brought by putative classes of healthcare providers and health insurance subscribers alleging that the Association and its members have used the Association’s agreements to fix prices and limit competition. She also represents BCBSA and various member plans in related opt‑out litigation across the country brought by large self‑funded subscribers and providers.
- Represented Micro Focus International (now OpenText) and certain officers in securing a favorable settlement in putative securities class action litigation in California state court and New York federal court concerning its $8.8 billion acquisition of certain of Hewlett Packard Enterprise’s software assets.
- Represented Louis Dreyfus Company and its subsidiary Imperial Sugar Company in an action brought by the Department of Justice (DOJ) in Delaware federal court seeking to enjoin U.S. Sugar’s proposed acquisition of Imperial Sugar from Louis Dreyfus. The court ruled in favor of the defendants, denying the DOJ’s request for an injunction to block the acquisition, and the Third Circuit unanimously affirmed the ruling.
- Represented 260 Twelfth Avenue Holdings LLC and other stakeholders in litigation to obtain just compensation for the taking of property through eminent domain by the National Railroad Passenger Corporation (Amtrak) in connection with the Hudson Tunnel Project in New York City. The parties reached a settlement shortly before a scheduled trial.
- Represented Morgan Stanley in litigation filed by Moby S.p.A., an Italian shipping company, in New York state court alleging tortious interference with Moby’s business relations, which ultimately resulted in Morgan Stanley obtaining a complete dismissal with prejudice of the action.
- Represented Viatris (formerly Mylan) in a shareholder class action that asserted numerous violations of the federal securities laws, all premised on other allegations related to Mylan’s marketing, pricing and classification of EpiPen, as well as alleged conduct concerning generic drug price‑fixing and market allocation. The court granted summary judgment entirely in favor of defendants, and the decision was affirmed on appeal by the Second Circuit.
Ms. Dwyer received a B.B.A. from the University of Notre Dame in 2013 and a J.D. with honors from The University of Texas School of Law in 2018, where she was an associate editor of the Law Review.
Ms. Dwyer was born in Glenside, Pennsylvania. She joined Cravath in 2018. From 2020 to 2021, Ms. Dwyer served as a law clerk to Hon. Mark A. Kearney of the U.S. District Court for the Eastern District of Pennsylvania. She rejoined Cravath from 2021 to 2023 and, following her time at another law firm in New York, returned to the Firm in 2024. Ms. Dwyer was elected a partner in 2025.
Ms. Dwyer’s clients have included 260 Twelfth Avenue Holdings, the Blue Cross Blue Shield Association and various member plans, Light & Wonder (formerly Scientific Games Corporation), Louis Dreyfus Company, Micro Focus, Morgan Stanley and Viatris.
Ms. Dwyer’s notable representations include:
- Representing the Blue Cross Blue Shield Association (“BCBSA”) and more than a dozen member plans in consolidated multidistrict antitrust class action litigation—one of the largest class actions in the country—brought by putative classes of healthcare providers and health insurance subscribers alleging that the Association and its members have used the Association’s agreements to fix prices and limit competition. She also represents BCBSA and various member plans in related opt‑out litigation across the country brought by large self‑funded subscribers and providers.
- Represented Micro Focus International (now OpenText) and certain officers in securing a favorable settlement in putative securities class action litigation in California state court and New York federal court concerning its $8.8 billion acquisition of certain of Hewlett Packard Enterprise’s software assets.
- Represented Louis Dreyfus Company and its subsidiary Imperial Sugar Company in an action brought by the Department of Justice (DOJ) in Delaware federal court seeking to enjoin U.S. Sugar’s proposed acquisition of Imperial Sugar from Louis Dreyfus. The court ruled in favor of the defendants, denying the DOJ’s request for an injunction to block the acquisition, and the Third Circuit unanimously affirmed the ruling.
- Represented 260 Twelfth Avenue Holdings LLC and other stakeholders in litigation to obtain just compensation for the taking of property through eminent domain by the National Railroad Passenger Corporation (Amtrak) in connection with the Hudson Tunnel Project in New York City. The parties reached a settlement shortly before a scheduled trial.
- Represented Morgan Stanley in litigation filed by Moby S.p.A., an Italian shipping company, in New York state court alleging tortious interference with Moby’s business relations, which ultimately resulted in Morgan Stanley obtaining a complete dismissal with prejudice of the action.
- Represented Viatris (formerly Mylan) in a shareholder class action that asserted numerous violations of the federal securities laws, all premised on other allegations related to Mylan’s marketing, pricing and classification of EpiPen, as well as alleged conduct concerning generic drug price‑fixing and market allocation. The court granted summary judgment entirely in favor of defendants, and the decision was affirmed on appeal by the Second Circuit.
Ms. Dwyer received a B.B.A. from the University of Notre Dame in 2013 and a J.D. with honors from The University of Texas School of Law in 2018, where she was an associate editor of the Law Review.
Ms. Dwyer was born in Glenside, Pennsylvania. She joined Cravath in 2018. From 2020 to 2021, Ms. Dwyer served as a law clerk to Hon. Mark A. Kearney of the U.S. District Court for the Eastern District of Pennsylvania. She rejoined Cravath from 2021 to 2023 and, following her time at another law firm in New York, returned to the Firm in 2024. Ms. Dwyer was elected a partner in 2025.
Education
-
J.D., 2018, The University of Texas School of Lawcum laude
-
B.B.A., 2013, University of Notre Dame
Clerkships
- Hon. Mark Kearney, U.S.D.C. for the Eastern District of Pennsylvania
Admitted In
- New York
Firm News
November 20, 2025
Cravath Announces New Partners and Of Counsels
Cravath has elected the following new partners, who will become members of the Firm on January 1, 2026:
Activities
February 11, 2025
Cravath Lawyers Lead Workshop at Jacksonville University College of Law
On January 31, 2025, Cravath lawyers Karin A. DeMasi, Minh Van Ngo and Hannah L. Dwyer led an all‑day workshop for first-, second- and third‑year students at the Jacksonville University College of Law. The workshop’s morning sessions provided an overview of the types and stages of litigation, from investigation to appeal, and the core skills of successful litigators, as well as the types of corporate law and the anatomy of a deal. The afternoon consisted of a discussion on professionalism, a Q&A session and networking. The Firm previously led the workshop for the Jacksonville University College of Law’s inaugural class in 2023.
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