Michael Tu leads the firm's securities litigation practice in Southern California. His practice focuses on litigation and counseling under the federal and state securities laws, mergers and acquisitions lawsuits, regulatory investigations and proceedings, securities and corporate governance advice, and business litigation and trade secrets disputes.  



Michael is recognized as a leading trial lawyer who has successfully prosecuted and defended numerous trials to verdict in federal and state courts, and is among the few lawyers in the country who have defended a securities class action trial to verdict.  That shareholder class action trial was recognized as one of the "Top Defense Verdicts" in California by the Daily Journal.

In addition to his representation of clients in litigation disputes, he regularly counsels public and private companies regarding securities, corporate governance and disclosure issues, and has represented numerous board committees and accounting firms in connection with investigatory and litigation matters. He frequently advises multi-national corporations and executives based in Asia and Europe with respect to business disputes and securities matters. His successful representation of clients in high-profile securities and corporate governance disputes has been widely reported in the media (Los Angeles Times, Wall Street Journal, New York Post, Hollywood Reporter, Variety, New York Times, Fortune), and he was recently recognized as one of the "Most Influential Minority Attorneys in Los Angeles" by the Los Angeles Business Journal.

Michael is:

  • Recommended for his “range of expertise, including the defense of securities class actions and M&A litigation,” “for the fact that he ‘takes a macro approach and looks very far down the line’” with a "'good oratory style'” (Chambers USA, 2015), and "The knowledge level that he has, his attention to detail and his communication skills are outstanding." (Chambers USA, 2017)
  • “Praised” “for his litigation skills” defending securities matters “in both federal and state courts”, noted as “particularly strong in securities class actions with a cross-border element” (The Legal 5002015) and "cares about clients and has innovative ways of solving their problems."  (The Legal 500, 2016)
  • Rated by clients and peers as an “Excellent trial attorney with practical sense” who has “a high level of expertise in the securities litigation field,” “practices with the highest ethical standards,” and “has a remarkable ability both to see the big picture and to sweat the details, and brings excellent judgment to bear on both fronts.” (Martindale-Hubbell)

Michael has moderated and spoken at numerous events on securities law and corporate governance developments. In addition, as a past faculty member of the Stanford Senior Executive Leadership Program, he has taught business executives and leaders on a number of subjects, including cross-border litigation, risk management and securities and accounting liability issues.

Michael serves as a member of the Board of Directors of the Constitutional Rights Foundation.  He is a member of the Executive Committee of the Litigation Section of the Los Angeles County Bar Association, and is the Editor of the Court Alerts Committee.  He previously served as the Co-Chair of the Federal Courts and Breakfast at the Bar Committees.  He is also a member of the Board of Advisors of the monthly Securities Reform Act Litigation Reporter publication.  He served as a Lawyer Representative for the Central District of California to the Ninth Circuit Judicial Conference from 2006-2009.

  • Michael is the Chair of Orrick's Technology Committee, and also serves as Vice Chair of the firm's Professional Development Committee. 

    Michael is a preapproved panel counsel member of AIG's Directors & Officers (Securities Claims) Panel.

  • Michael's notable representations include the following.

    • The former president of the nation's largest mortgage lender in dozens of class action, derivative, investigative and other related litigation matters by shareholders, bondholders, institutional investors, and federal and state regulators, alleging fraud and securities violations.
    • Principal officers and directors of a leading media and marketing company in a shareholder class action alleging securities violations in connection with a reverse merger transaction that resulted in a complete defense verdict following trial, which was affirmed on appeal.
    • Hong Kong- and China-based affiliates of two international accounting firms with respect to securities counseling and audit issues, and shareholder class action lawsuits alleging securities fraud claims.
    • Special committees and special litigation committees of the boards of five public companies with respect to internal investigations and litigation in connection with executive stock option and compensation issues.
    • An interactive music and entertainment company and its officers and directors in a shareholder lawsuit alleging fraud, breaches of fiduciary duties, dilution, unfair business practices and other direct and derivative claims, which was dismissed with prejudice, and affirmed on appeal. 
    • Principal executive officers and directors of one of the country's leading multi-state managed health care organizations in shareholder class action and derivative lawsuits filed in federal and state courts alleging accounting violations, resulting in dismissal of claims.
    • Underwriters, investment banks and financial institutions in the defense of shareholder class action and derivative litigation matters alleging violations of securities laws in connection with public securities offerings brought in federal and state courts.
    • Principal executive officers and directors of a water company in multiple federal and state shareholder class action and derivative lawsuits alleging securities violations.
    • An Internet media company and its principal officers and directors in several federal and state cases involving merger, derivative and shareholder class action litigation.
    • Principal officers and directors of financial services company in shareholder class action and related bankruptcy proceedings with respect to allegations of securities fraud in connection with the securitization of loan receivables, resulting in complete dismissal of claims.
    • A national recycling company and its executives in a securities class action alleging tax and accounting claims, obtaining the dismissal of all claims with prejudice.
    • A foreign sovereign entity in international and U.S. securities fraud litigation regarding an early stage internet investment fund.
    • A fiber optics technology company and its principal officers and directors in securities fraud litigation brought by investors, resulting in complete dismissal of claims.
    • A national restaurant company and its principal officers and directors in shareholder class action alleging accounting and disclosure violations, resulting in dismissal of claims.
    • A technology services company and its principal officers and directors in securities fraud class action and related bankruptcy proceedings.
    • An international pharmaceutical company in the defense of a federal securities fraud lawsuit, and member of the trial team that obtained a favorable trial verdict.
    • A software company and its principal officers and directors in securities class action alleging accounting and disclosure violations.
    • A healthcare insurance company and its principal officers and directors in securities class action litigation, resulting in dismissal of all claims.
    • A software modeling company and its principal executive officers in securities class action litigation alleging accounting allegations, resulting in dismissal of all claims.
    • A medical device company and its principal officers and directors in shareholder class action and derivative lawsuit brought in federal and state courts.

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