Agnès Dunogué


Agnès is Co-Head of US Securities & Shareholder Litigation. She focuses on securities litigation, as well as complex commercial litigation and appellate litigation, and investigations.

Agnès has represented investment banks, other companies, and directors and officers in numerous securities matters in state and federal courts. She has represented companies in investigations by DOJ, the SEC, the CFTC, bank regulatory, state regulatory, FINRA, and other authorities. Her practice also includes representing clients in antitrust litigation and advising clients in the context of mergers and acquisitions.

Agnès is a former law clerk to Judge Robert D. Sack, on the U.S. Court of Appeals for the Second Circuit, and Judge Kimba M. Wood, on the U.S. District Court for the Southern District of New York.


Representative matters

Uber Technologies in consolidated putative securities class action in connection with initial public offering, asserting claims under the Securities Act.

Underwriter syndicates including, variously, J.P. Morgan, Citigroup, Barclays, Citigroup, Credit Suisse, Goldman Sachs, Morgan Stanley, and other global banks, in securities class actions on behalf of investors in companies such as Benefitfocus, AMC, Evoqua, Mesa Air, CPI Card Group, Sprouts, Endocyte Pharmaceuticals, Nationstar, Biozoom and others.

BNP Paribas in putative class actions under antitrust laws in connection with U.S. Treasury securities and Government-Sponsored Entities (GSE) bonds.  

Paramount Global in putative securities class action in connection with a public offering.

Pro bono

Agnès filed an amicus brief on behalf of the Service Women’s Action Network (SWAN) and a number of individual retired or former military officers in support of petitioners in a case before the United States Supreme Court, Whole Women’s Health v. Hellerstedt.

Agnès also filed an amicus brief on behalf of the National Women’s Law Center and 72 additional organizations in Dobbs v. Jackson Women’s Health Organization, before the Supreme Court.

Among other engagements, Agnès also represented a pro bono client in an appeal to the New York Supreme Court, Appellate Division, of a Family Court decision, obtaining a unanimous reversal of the order that had been entered against her client; the appellate decision was reported in the New York Law Journal.

A wonderful lawyer, very talented and very practical, terrific, an excellent securities litigator who is great to deal with, very smart, very poised and always has good ideas, savvy and on top of the issues, and has a really strong practice
Chambers USA
A rare class of master securities and appellate litigators” and notes that she is “an integral member of the firm’s potent legal team
Benchmark Litigation


  • Ranked in Chambers USA in Securities Litigation, 2020 – 2023
  • Recognized as a “Next Generation Partner” in The Legal 500 in Securities Litigation Defense, 2017 – 2023
  • Recognized as a “Rising Star” in Securities by Law360, 2016
  • Recognized in Benchmark Litigation’s inaugural “Under 40 Hot List”, 2016
  • Recognized in Benchmark Litigation as a “Future Star” in 2019, and a “Litigation Star”, 2020 – 2023
  • Recognized in Benchmark Litigation’s “Top 250 Women in Litigation” guide, 2021 - 2023



New York, 2005


United States Supreme Court, 2016

United States Court of Appeals for the Second Circuit, 2010

United States Court of Appeals for the Seventh Circuit, 2016

United States Court of Appeals for the Ninth Circuit, 2012

United States District Court for the Southern District of New York, 2006

United States District Court for the Eastern District of New York, 2006


Bachelor of Arts, summa cum laude, Harvard University, 1998

J.D., Yale University, 2004


A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.