Gregg M. Mashberg

Partner at Proskauer Rose LLP

Gregg M. Mashberg

Gregg M. Mashberg

Partner at Proskauer Rose LLP

Biography

Gregg Mashberg is co-head of the Securities Litigation Group and a former chair of the Litigation Department. He has a broad-based practice and experience before numerous judicial and administrative forums.

Gregg has a particular focus on securities litigation, defending public companies and their directors and officers in class actions, SEC investigations and enforcement actions. Gregg also has broad experience in defending directors and officers in shareholder derivative and class actions arising from mergers and acquisitions and direct breach of fiduciary duty suits under state law. As part of his securities litigation practice, Gregg is outside litigation counsel for The Depository Trust & Clearing Corporation and its subsidiaries, the nation's principal securities settlement and depository institutions. He has litigated in trial and appellate courts around the country, successfully defending against claims challenging the securities clearing and settlement system.

In addition, Gregg has been active in litigation concerning various high-tech industries. He has substantial experience litigating disputes relating to telecommunications services and automated systems for processing securities transactions.

Gregg also has substantial litigation experience involving core aspects of Proskauer’s litigation practice, including general commercial disputes, antitrust, bankruptcy, entertainment, sports, First Amendment and trade secrets. He recently won summary judgment in a commercial dispute on behalf of a major British company, dismissing a complaint seeking $100 million in damages. Gregg is an experienced courtroom lawyer; for example, he won a $3 million federal jury verdict in a stockholders’ derivative action in a case involving the closing of a Wall Street brokerage house.

Following law school, Gregg spent five years in the New York City Corporation Counsel's Office, becoming an Assistant Chief of the General Litigation Division. In that position, Gregg was lead counsel for the City in major institutional change class actions. He also represented the City in litigation concerning significant public policy disputes.

Gregg has maintained his interest in public law, most recently serving as lead counsel to St. Vincent's Catholic Medical Center in defending against an Article 78 proceeding that challenged the NYC Landmarks Preservation Commission's decision to permit St. Vincent's to demolish a building in the Greenwich Village Historic District in order to make way for a new proposed $850 million hospital building. He also represented the NY Metropolitan Transportation Authority in successfully defending against challenges to the MTA’s 2003 decision to raise fares and tolls in the amount of $900 million.

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Chairman Emeritus of the Board of Directors at The Washington Institute for Near East Policy

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President & Director at The Washington Institute for Near East Policy

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Chair of Corporate Department & Managing Partner of Paris Office at Proskauer Rose LLP

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Senior Partner at Proskauer Rose LLP

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Co-Chair, ERISA Litigation Practice Group at Proskauer Rose LLP

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Partner at Proskauer Rose LLP

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Partner at Proskauer Rose LLP

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Assistant Secretary, National Commission at Anti-Defamation League

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Partner at Proskauer Rose LLP

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Partner at Proskauer Rose LLP

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Gregg M. Mashberg
Partner at Proskauer Rose LLP
Education
J.D.
Class of 1977

Founded in 1835, New York University School of Law has a record of academic excellence and national scholarly influence. One of the first law schools to admit women, it has been long committed to welcoming students of diverse backgrounds, people who had been discriminated against by many other institutions. Located on the University's campus in Greenwich Village, NYU Law has been a leader, and continues to be, in areas such as law and business, clinical education, public service, interdisciplinary colloquia and global studies.

B.A., cum laude
Class of 1973

Case Western Reserve University provides educational services. It offers a variety of undergraduate degree courses and graduate and professional options such as arts and sciences, dentistry, engineering, law, management, medicine, nursing, social work, and more. The firm also offers dual-degree programs. The company was founded in 1826 and is headquartered in Cleveland, OH.

Graduate

University at Buffalo Law School is a school.

Memberships
Member
Prior
Career History
Partner
Current

Proskauer Rose LLP is a law firm in New York, NY. It offers corporate finance, mergers and acquisitions, private equity, real estate transactions, bankruptcy and reorganizations, taxation, litigation, trusts and estates, intellectual property, and labor and employment law services. It serves the chemicals, entertainment, financial services, health care, hospitality, information technology, insurance, internet, manufacturing, media and communications, pharmaceuticals, real estate investment, sports, and transportation industries. The company was founded in 1875.

Assistant Chief, General Litigation Division
1978 - 1983
Boards & Committees
Member, National Executive Committee
Current

The Anti-Defamation League was founded in 1913 "to stop the defamation of the Jewish people and to secure justice and fair treatment to all." Now the nation's premier civil rights/human relations agency, ADL fights anti-Semitism and all forms of bigotry, defends democratic ideals and protects civil rights for all. A leader in the development of materials, programs and services, ADL builds bridges of communication, understanding and respect among diverse groups, carrying out its mission through a network of 27 Regional and Satellite Offices in the United States and an office in Israel. The Anti-Defamation League (ADL) fights anti-Semitism and all forms of bigotry in the U.S. and abroad through information, education, legislation and advocacy. ADL serves as a resource for government, media, law enforcement, educators and the public.

Member, Board of Trustees
Prior

A nonpartisan, nonprofit organization, The Washington Institute seeks to advance the values and interests of the United States and its allies in the Middle East.

Political Donations
$1,000
2011

Professional at Cornell University - Institute of Politics and Global Affairs

$500
2007

White House Cyber Security Adviser at Executive Office of the President Under Donald Trump

$1,000
2007

Senator from Rhode Island

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