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James Ostaszewski



James Ostaszewski prosecutes complex securities fraud cases on behalf of institutional investors. Currently, he is litigating a case against major U.S. stock exchanges related to improper market manipulation, as well as cases against Goldman Sachs and Allstate, among others. Since joining Labaton Sucharow, James has assisted in all aspects of litigation—including conducting fact and expert witness depositions and presenting oral arguments—and he has aided the Firm in successfully pursing claims in the In re Petrobras Securities Litigation ($2.95 billion recovery) and In re Amgen Inc. Securities Litigation ($95 million settlement) cases.

Prior to joining Labaton Sucharow, James was a litigation associate at Boies, Schiller & Flexner LLP, where he worked on complex civil litigation in federal and state courts, with a focus on securities litigation and complex financial disputes. He drafted pleadings and briefs, coordinated all aspects of document discovery, represented plaintiffs in multibillion dollar litigation stemming from complex financial fraud, prepared key fact and expert witnesses, and conducted deposition questioning. He was also active in pro bono service, and participated in the landmark civil rights case that overturned California’s Proposition 8 and restored same-sex marriage rights.

Earlier in his legal career, James worked as a judicial clerk for the Honorable David G. Trager in the Eastern District of New York, and as a legal intern for the King's County District Attorney's Office. James received his J.D., magna cum laude, from Brooklyn Law School, where he served as Articles Editor of the Brooklyn Law Review. He earned his B.S. in Physics, summa cum laude, from St. John's University.

Currently, James is actively involved in the New York City Bar Association's Task Force on Puerto Rico. He also participates in pro bono service, representing international victims of torture seeking asylum, and parents who have been separated from their children while crossing the border.


Brooklyn Law School
J.D., 2009, magna cum laude

St. John's University
B.S., 2006, summa cum laude


2010, New York

U.S. District Court
2011, Southern District of New York