Pomerantz LLP

Patrick V. Dahlstrom

Senior Partner


Securities Litigation

Washington College of Law
American University

State of New York; State of Illinois; U.S. District Courts for the Southern and Eastern Districts of New York, the Northern District of Illinois, the Northern District of Indiana, the Eastern District of Wisconsin, the District of Colorado, the Western District of Pennsylvania; U.S. Courts of Appeals for the First, Fourth, Sixth, Seventh, Eighth, and Ninth Circuits; U. S. Supreme Court.


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Patrick Dahlstrom joined Pomerantz as an associate in 1991 and became a partner in January 1996. He was Co-Managing Partner with Jeremy Lieberman in 2017 and 2018 and is now Senior Partner. Patrick is based in the Firm’s Chicago office. He was honored as a Super Lawyers® “Top-Rated Securities Litigation Attorney” in 2018 and in 2019 in both Securities Litigation and Appellate matters.

Patrick is a member of the Firm’s Institutional Investor Practice and New Case Groups, and has extensive experience litigating cases under the PSLRA. He was partner-in-charge of In re Comverse Technology, Inc. Securities Litigation, No. 06-CV-1825 (E.D.N.Y.), in which the Firm, as Lead Counsel, recovered a $225 million settlement for the Class – the second-highest ever for a case involving back-dating options, and one of the largest recoveries ever from an individual officer-defendant, the company’s founder and former CEO. In Comverse, the Firm obtained an important clarification of how courts calculate the “largest financial interest” in connection with the selection of a Lead Plaintiff, in a manner consistent with Dura Pharmaceuticals, Inc. v. Broudo, 544 U.S. 336 (2005). Judge Garaufis, in approving the settlement, lauded Pomerantz: “The court also notes that, throughout this litigation, it has been impressed by Lead Counsel’s acumen and diligence. The briefing has been thorough, clear, and convincing, and ... Lead Counsel has not taken short cuts or relaxed its efforts at any stage of the litigation.”

In DeMarco v. Robertson Stephens Inc., 228 F.R.D. 468 (S.D.N.Y. 2005), Patrick obtained the first class certification in a federal securities case involving fraud by analysts.

Patrick’s extensive experience in litigation under the PSLRA has made him an expert not only at making compelling arguments on behalf of Pomerantz’ clients for Lead Plaintiff status, but also in discerning weaknesses of competing candidates. In re American Italian Pasta Co. Securities Litigation and Comverse are the most recent examples of his success in getting our clients appointed sole Lead Plaintiff despite competing motions by numerous impressive institutional clients.

Patrick was a member of the trial team in In re ICN/Viratek Securities Litigation (S.D.N.Y. 1997), which, after trial, settled for $14.5 million. Judge Wood praised the trial team: “[P]laintiffs counsel did a superb job here on behalf of the class. ...This was a very hard fought case. You had very able, superb opponents, and they put you to your task. ...The trial work was beautifully done and I believe very efficiently done.”

Patrick’s speaking engagements include interviews by NBC and the CBC regarding securities class actions, and among others, a presentation at the November 2009 State Association of County Retirement Systems Fall Conference as the featured speaker at the Board Chair/Vice Chair Session entitled: “Cleaning Up After the 100 Year Storm. How trustees can protect assets and recover losses following the burst of the housing and financial bubbles.”

Patrick is a 1987 graduate of the Washington College of Law at American University in Washington, D.C., where he was a Dean’s Fellow, Editor in Chief of the Administrative Law Journal, a member of the Moot Court Board representing Washington College of Law in the New York County Bar Association’s Antitrust Moot Court Competition, and a member of the Vietnam Veterans of America Legal Services/Public Interest Law Clinic. Upon graduating, Patrick served as the Pro Se Staff Attorney for the United States District Court for the Eastern District of New York and was a law clerk to the Honorable Joan M. Azrack, United States Magistrate Judge.

Patrick is admitted to practice in New York and Illinois, as well as the United States District Courts for the Southern and Eastern Districts of New York, Northern District of Illinois, Northern District of Indiana, Eastern District of Wisconsin, District of Colorado, Western District of Pennsylvania, the United States Courts of Appeals for the First, Fourth, Sixth, Seventh, Eighth, and Ninth Circuits, and the United States Supreme Court.