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Michael J. Quinn

Fax +1.310.552.5001

Mr. Quinn focuses his practice on business and commercial litigation, with a particular emphasis on securities litigation and securities enforcement.  He regularly represents public companies, individuals, broker-dealers, and investment advisers in a wide range of matters, including civil litigation and investigations by the United States Securities and Exchange Commission (SEC), the United States Department of Justice (DOJ), the Financial Industry Regulatory Authority (FINRA), and state securities regulators or attorneys general.  He also has extensive experience handling complex securities litigation, including regulatory or disciplinary proceedings, class action lawsuits, and arbitrations.

When he was a Staff Attorney with the SEC Division of Enforcement, Mr. Quinn investigated and litigated securities fraud cases, including matters involving offering frauds, market manipulation, insider trading, and accounting fraud.

Mr. Quinn routinely advises clients with respect to private civil litigation in federal and state courts, government enforcement matters, and internal investigations involving:

  • corporate disclosure issues
  • accounting irregularities and other financial reporting issues affecting public companies
  • stock promotion practices
  • securities newsletter publication issues
  • broker-dealer regulation
  • securities sales practice issues
  • compliance and supervisory issues
  • investment adviser practices and procedures
  • alleged insider trading and market manipulation

Professional Background

Staff Attorney, Division of Enforcement, U.S. Securities and Exchange Commission, 1998 2000


Mr. Quinn was selected for inclusion in Southern California Rising Stars by Los Angeles Magazine in 2006, 2007, 2008 and 2009.

Professional/Civic Activities

  • American Bar Association
  • Los Angeles County Bar Association
  • Served as lead trial counsel in successfully defending an owner of a broker-dealer at trial in an SEC Administrative Proceeding on claims that the client violated a prior SEC suspension order.
  • Obtained a rare Equal Access to Justice Act (EAJA) award of attorneys' fees from the SEC in favor of the preceding client, who was cleared of liability at trial.
  • Served as lead trial counsel in winning unanimous jury verdicts on all causes of action in defense of an investment adviser against claims by a customer of fraud, breach of fiduciary duty, and breach of contract alleging millions of dollars in damages.
  • Served as lead counsel in obtaining complete defense victory in post-merger arbitration, defending large international healthcare company against shareholder claims.
  • Served as lead trial counsel in successfully defending a broker-dealer in a FINRA arbitration on claims by a customer of fraud and market manipulation.
  • Served as lead trial counsel in winning verdicts in favor of a securities publishing company for fraud and conversion against a retail supplier.
  • Served as lead counsel in obtaining dismissal of securities fraud class action suit on a motion to dismiss on behalf of a publicly traded healthcare company alleged to have made false and misleading statements in connection with its Initial Public Offering.
  • Served as lead counsel in obtaining key discovery orders against the SEC requiring that it produce its investigating attorneys for deposition and produce its communications with foreign securities regulators.
  • Played a significant role as one of the lawyers representing the bankruptcy examiner appointed with respect to New Century Financial Corporation; participated in key aspects of a large investigation of reported accounting irregularities.
  • Has represented corporations and individual officers in connection with SEC, DOJ, and internal investigations as well as related class action and derivative litigation concerning stock option back dating allegations.
Published Decisions
  • McClain v. Iradimed Corp., 111 F. Supp. 3d 1293 (S.D. Fla. 2015)
  • SEC v. McCabe, No. 13-cv-0161, 2015 WL 2452937 (D. Utah May 22, 2015)
  • In the matter of SEC v. Elliott, 83 SEC Docket 2056, Initial Decision Release No. 255 (August 17, 2004)
  • AOL v. Nam Tai Electronics, Inc., 264 Va. 583 (2002)