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Joni S. Jacobsen defends publicly traded companies and their directors and officers entangled in complex securities class action litigation, derivative litigation, SEC investigations, and corporate governance disputes. Ms. Jacobsen also conducts internal investigations for public and private companies, boards of directors and special committees, and frequently counsels clients on a wide range of strategic litigation and corporate governance matters. Her experience extends to a wide range of underlying issues including alleged accounting irregularities, insider trading, inadequate or misleading public disclosures, breaches of fiduciary duties and short-swing trading.

Ms. Jacobsen has represented, among others: thirty public companies, including Martha Stewart Living Omnimedia, Red Hat, Priceline.com, TheStreet.com and others, in the In re Section 16(b) Litigation where the District Court’s dismissal was affirmed by the Ninth Circuit*; MEMC Electronic Materials, Inc. in a securities class action and related derivative litigation where dismissal was affirmed by the Eighth Circuit*; and directors and officers of AsiaInfo-Linkage, Inc. in connection with a derivative action involving executive compensation. Her sophisticated approach has allowed her to succeed in getting the vast majority of the securities and derivative litigation cases dismissed outright on a motion to dismiss. In those cases that have survived motion practice, she has used discovery and class certification to strategically position the case for the best possible resolution, including summary judgment.

Ms. Jacobsen has been selected annually for the Illinois Super Lawyers list since 2013.

Prior to joining Dechert, Ms. Jacobsen was a partner in the litigation and dispute resolution practice of an international law firm.


The University of Utah, B.A., 1991
The University of Chicago Law School, J.D., 1997

Court Admissions

Supreme Court of the United States
United States District Court for the Northern District of Illinois
United States Court of Appeals for the Sixth Circuit
United States Court of Appeals for the Eighth Circuit
United States Court of Appeals for the Ninth Circuit

Bar Admissions/Qualifications



Chicago Bar Association
Coalition for Women’s Initiatives in Law Firms Policy Committee (2009-2011)
National Women’s Law Center, Leadership 35 Advisory Committee (2009-2013)