MaryJeanette Dee


Peer Rating
AV® Preeminent

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Practice Areas

  • Government Contracts,
  • Investigations &
  • International Trade
  • Litigation
  • White Collar Defense and
  • Corporate Investigations
University Wells College, B.A., summa cum laude
Law SchoolHarvard Law School, J.D., cum laude, 1990
Admitted1990, Massachusetts (inactive); 1994, New York; U.S. District Courts for the Southern and Eastern Districts of New York

MaryJeanette Dee is a partner in the Government Contracts, Investigations and International Trade Practice Group in the firm's New York office.

Areas of Practice

Ms. Dee concentrates in internal investigations and regulatory and white collar criminal defense. Ms. Dee frequently represents banks, broker-dealers, investment advisers, corporate officers, securities professionals and lawyers in connection with investigations and inquiries by the U.S. Attorney's Offices for the Southern and Eastern Districts of New York, the SEC, FINRA, the NY Attorney General's Office and other governmental entities and self-regulatory organizations. She has conducted numerous internal investigations into a wide variety of allegations, including insider trading, trading and position valuation issues, misuse of confidential information, embezzlement, and retail brokerage sales practice violations. Some notable representations include:

•Representation of the Private Bank division of a global investment bank in connection with ongoing FINRA, SEC and state securities regulatory inquiries and investigations;

•Representation of global investment bank in connection with trading by a customer's rogue trader under the SEC's market access rule (Rule 15c3-5);

•Representation of global investment bank in connection with whistleblower allegations of improper marking-to-market of equity derivatives;

•Representation of senior mortgage finance professionals in RMBS-related investigations and litigations;

•Representation of financial advisors in connection with FINRA investigation into CRD disclosures;

•Representation of a global financial institution in connection with FINRA investigation of its retail securities lending program;

•Representation of a compliance professional in SEC information barriers investigation;

•Representation of a trader in FINRA investigation relating to alleged kickback scheme;

•Representation of operations professionals in connection with SEC soft dollar investigation;

•Representation of a retail branch manager in connection with FINRA Ponzi scheme investigation;

•Representation of a global investment bank in connection with embezzlement by operations employee;

•Representation of a global investment bank in parallel federal criminal and SEC stock loan investigations; and

•Representation of global investment banks and investment advisers in connection with insider trading investigations.

In 1993, Ms. Dee served as Special District Attorney in the Middlesex County District Attorney's Office in Massachusetts. She obtained convictions in bench and jury trials for credit card fraud, aggravated assault, stalking and other felony crimes.

Ms. Dee's work and professionalism have earned her recognition as a top white collar criminal defense lawyer. She has been awarded an AV Rating by Martindale-Hubbell Peer Review. In 2007, 2008, 2011 and 2013 the Legal 500 directory recognized her accomplishments in this area. She was also named a New York Super Lawyer in white-collar criminal defense in 2008 through 2013. She has also served as a Trustee of the Harvard Law School Alumni Association of New Jersey and is a member of a number of professional associations.


•Legal 500, 2007, 2008, 2011, 2013

•New York Super Lawyers, 2008-2013

•AV Rated, Martindale-Hubbell


Documents by this lawyer on

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Second Circuit Limits "Tippee" Insider Trading Liability
Sarah E. Aberg,MaryJeanette Dee, January 16, 2015
In United States v. Newman, No. 13-1837 (2d Cir. Dec. 10, 2014), the United States Court of Appeals for the Second Circuit reversed the 2013 convictions of Anthony Chiasson and Todd Newman on charges of conspiracy to commit insider trading and insider trading under 18 U.S.C. § 371, Sections...

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Office Information

MaryJeanette Dee

New YorkNY 10112


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