Sarah D.Efronson


New York + 1.212.326.3879

Sarah Efronson practices complex commercial litigation, with a focus on securities and financial products litigation. Her experience covers all stages of litigation, including trial. Sarah also conducts internal investigations on behalf of companies and represents individuals and entities in connection with regulatory investigations and enforcement matters before the Department of Justice (DOJ), the Securities and Exchange Commission (SEC), and the Financial Industry Regulatory Authority (FINRA).

Sarah maintains an active pro bono practice. She has represented clients in immigration, housing, and family court proceedings. In both 2015 and 2017, she received a Pro Bono Publico Award from The Legal Aid Society.

Prior to attending law school, Sarah worked for Teach For America as a sixth grade reading and language arts teacher in Miami.


  • Pharmaceutical company defends putative securities fraud class actionJones Day represents a pharmaceutical company, along with current and former officers, in a putative securities fraud class action arising from announcements the company made related to three different drugs in development or on the market, which the plaintiff claims together caused the company's stock to drop 40 percent.
  • Harman International Industries obtains plaintiff's voluntary discontinuance of shareholder class actionJones Day represented Harman International Industries, Incorporated and certain of its officers and directors in this class action lawsuit that was filed on May 8, 2007 in the Superior Court of the District of Columbia.
  • Victim of domestic violence and her children obtain lawful permanent statusSarah D. Efronson and Jeremy M. Amar-Dolan assisted client M.S. and her three children in obtaining lawful permanent resident status in the United States.
  • Jones Day advises on UK's first Deferred Prosecution Agreement and closure of U.S. DOJ investigationOn Monday, November 30, 2015, the Right Honourable Sir Brian Leveson (the President of the Queen's Bench Division) approved the resolution of the first UK Bribery Act section 7 proceedings by way of a Deferred Prosecution Agreement, a procedure never before used in the UK.
  • AG of America acquires majority interest of The Dennis GroupJones Day represented Andrade Gutierrez S.A., one of Brazil's largest construction and engineering companies, in its acquisition, through Andrade Gutierrez of America, Inc. ("AG of America"), of The Dennis Group, Inc., a leading U.S. company that offers complete planning, architectural, process engineering, and construction management services to the food and beverage industries.
  • Parakou Tankers defends putative shareholder class action and derivative actionJones Day is representing Parakou Tankers Inc. in a putative shareholder class action and derivative action pending in Florida state court arising out of a proposed merger between a special purpose acquisition company called Cambridge Capital Acquisition Corporation and Parakou.
  • Mother obtains Orders of Protection for herself and her children, full custody of her children, and child support order above state standardsThe Jones Day team of Sanjay Narayan, Sarah Efronson, and Michael Caputo assisted a mother with filing a Family Offense Petition and obtained final Orders of Protection against her abusive husband in favor of the mother and her four, young children.
  • Government stipulates to grant of asylum for client from The GambiaBetween 2007 and 2009, client NC was repeatedly discriminated against and threatened by authorities of The Gambian government on account of her political beliefs and those of her family.
  • Speaking Engagements

    • July 13, 2016
      What It's Really Like To Practice Law As a Woman presented by the New York City Bar Association and New York Women's Bar Association