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Dana M. Seshens


Co-head of Civil Litigation. Focuses on complex commercial litigation and securities class actions, with considerable experience in trials and arbitrations.

Dana is co-head of our Civil Litigation group. Her practice focuses on complex commercial litigation and securities class actions, with considerable experience representing clients in trials and arbitrations.

She also works on bankruptcy litigation and IP litigation matters.

Dana represents various corporate clients and financial institutions, and has extensive experience across a wide range of civil litigation and advisory matters.

Crain’s New York Business included Dana on its 2021 list of Notable Women in Law.

Experience highlights

  • Comcast in a breach of contract action brought by Nexstar
  • IHS Markit and affiliated entities in Delaware Chancery Court litigation arising out of a joint venture dispute
  • A leading high-performance lithium technology manufacturer in an ICC arbitration relating to alleged breaches of a supply agreement
  • Multinational pharmaceutical company in:
    • Trade-secret litigation brought against former employees and founders of a new pharmaceutical company
    • Litigation alleging trade-secret misappropriation and other claims related to pneumococcal vaccines
  • An innovative real estate firm in litigation concerning tort and competition-based claims in New York Supreme Court, Commercial Division
  • Signify Health in a commercial dispute involving tortious interference and trade-secret misappropriation claims
  • Livent in securities litigation arising out of its IPO
  • Underwriter defendants in securities litigation arising out of Velocity Financial’s IPO
  • Verisk and Xactware in contempt proceedings arising out of prior patent litigation
  • Underwriter defendants in two different securities litigations concerning California wildfires and two major California utility companies
  • Underwriter defendants in securities litigation arising out of the IPO of Arlo Technologies
  • A major financial institution and its affiliates in antitrust litigation concerning the alleged manipulation of the Canadian Dealer Offered Rate
  • Aetna and its board of directors in:
    • Securities litigation arising out of the proposed Aetna-CVS merger
    • Securities litigation and shareholder matters arising out of Aetna’s withdrawal from certain public healthcare exchanges
    • Shareholder litigation arising out of Aetna’s proposed acquisitions of Humana and Coventry Health Care
    • Securities litigation concerning Aetna’s disclosure of information related to political contributions
  • Roche Diagnostics in a contract dispute in Delaware Chancery Court relating to earn-out provisions in a merger agreement
  • Comcast and certain affiliates in:
    • Bankruptcy proceedings and related litigation concerning Comcast SportsNet Houston
    • Patent infringement litigation brought by Rovi Guides and Veveo
    • Class action antitrust litigation as trial counsel
  • An affiliate of Universal Parks and Resorts in a real estate dispute concerning land in Orlando
  • Sterling Equities and the owners of the New York Mets in the Madoff liquidation proceeding
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Benchmark Litigation – New York, Star

Chambers USA – Litigation: Securities, New York

Crain’s New York Business – “Notable Women in Law,” 2021

Law360 – “Rising Star: Securities,” 2014

Lawdragon – 500 Leading Lawyers in America, 2021

Legal Momentum – The Women’s Legal Defense and Education Fund, “Next Generation Leader,” 2021

J.D., Georgetown University Law Center
  • cum laude
  • Notes Editor, Georgetown Law Journal
B.A., Public Policy Studies, Duke University
  • magna cum laude
Law Clerk, Hon. Carol Bagley Amon, U.S. District Court, E.D. New York, 2002-2003
Professional history
  • Partner, 2011-present
  • Davis Polk since 2003
Qualifications and admissions
  • State of New York
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Court of Appeals, Fifth Circuit
  • U.S. Court of Appeals, Second Circuit
  • U.S. Court of Appeals, Sixth Circuit
  • U.S. Court of Appeals, Third Circuit
  • U.S. District Court, E.D. New York
  • U.S. District Court, S.D. New York
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