Seth Aronson

Partner

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Seth Aronson is a leading securities litigator and was recently named the Los Angeles Securities Litigation “Lawyer of the Year.” He served as Firmwide chair of the Securities Litigation Practice from March 2002 to March 2011 and as the Managing Partner of O’Melveny’s Los Angeles office from July 2000 through January 2008. Seth defends corporations and their directors, officers and professionals in securities class actions, shareholder derivative actions, SEC enforcement proceedings, RICO, and mergers and acquisitions litigation.

Many of the world’s leading companies in a variety of industries call on Seth to handle their most complex litigation, including Tenet Healthcare and Lockheed Martin, to name a few. Seth has significant experience with leading technology companies, including Broadcom, E-commerce China Dangdang, Montage Technology Group, Vitesse Semiconductor, Powerwave Technologies, Liberate Technologies, Giant Interactive, and AST Research.

Seth has been recognized by Chambers and Partners: Chambers USA - America’s Leading Business Lawyers:  Securities Litigation (national) (“phenomenal” with a “strong record of defending …shareholder class actions and derivative lawsuits”), and Securities Litigation (California; Band 1) (“stellar reputation,” “go-to person and a strong advocate”); named a “Top 100 Lawyer” by Daily Journal (2008) (“Around the country, he’s known as a perspicacious hard-nosed litigator who can go toe-to-toe with the most aggressive plaintiff lawyer”); listed in Legal 500 United States for his securities litigation practice; named a leading California litigator and a “National Litigation Star,” and ranked among the top 50 securities litigators by Benchmark Litigation; listed as a “Highly Recommended” lawyer in Dispute Resolution by PLC Which Lawyer?; recognized by Who’s Who Legal: California (2009) as one of the top 34 commercial litigators in the state (“one of the go-to guys for securities litigation and was consistently endorsed by some of the practice area's heavy-hitters”); recognized by the Los Angeles Business Journal (2007) in its “Best of the Bar” special report as one of the top 12 litigators among Los Angeles County’s 48,000 lawyers; recognized by the Los Angeles Daily Journal (2005) as one of the top 30 securities litigators in California; named by Lawdragon as one of the “500 Leading Lawyers in America” (2006-09), as well as one of the top “100 Securities Litigators You Need to Know” (2008); and is recognized by Best Lawyers in America (2006-17) in four categories: Bet-the-Company Litigation, Commercial Litigation, Litigation - Regulatory Enforcement (SEC, Telecom, Energy), and Litigation - Securities, and earned the singular distinction of 2013 Los Angeles Securities Litigation “Lawyer of the Year” and 2018 Los Angeles Litigation - Regulatory Enforcement (SEC, Telecom, Energy) "Lawyer of the Year."

Honors & Awards

  • Mentor Firm of the Year Award, the Constitutional Rights Foundation, on behalf of the Firm (1992)
  • Ranked by Chambers USA as a leading lawyer in three categories: General Commercial Litigation (California), Securities Litigation (National), and Securities Litigation (California; Band 1)
  • Named a “Top 100 Lawyer” by Daily Journal (2008)
  • Listed in Legal 500 United States for Securities Litigation
  • Named a leading California litigator and a “National Litigation Star,” and ranked among the top 50 securities litigators by Benchmark Litigation
  • Listed as a “Highly Recommended” lawyer in Dispute Resolution by PLC Which Lawyer?
  • Recognized by Who’s Who Legal: California (2009) as one of the top 34 commercial litigators in the state
  • Recognized by the Los Angeles Business Journal (2007) in its “Best of the Bar” special report as one of the top 12 litigators among Los Angeles County’s 48,000 lawyers
  • Recognized by the Los Angeles Daily Journal (2005) as one of the top 30 securities litigators in California
  • Named by Lawdragon as one of the “500 Leading Lawyers in America” (2006-09) and one of top “100 Securities Litigators You Need to Know” (2008)
  • Recognized by Best Lawyers in America (2006-17) in four categories: Bet-the-Company Litigation, Commercial Litigation, Litigation - Regulatory Enforcement (SEC, Telecom, Energy), and Litigation - Securities, and earned the singular distinction of 2013 Los Angeles Securities Litigation “Lawyer of the Year” and 2018 Los Angeles Litigation - Regulatory Enforcement (SEC, Telecom, Energy) "Lawyer of the Year"

Admissions

Bar Admissions

  • California

Court Admissions

  • US District Court for the Central, Northern, and Southern Districts of California
  • US Court of Appeals for the Eighth and Ninth Circuits
  • US Supreme Court

Education

  • Loyola University, J.D., 1981
  • Ohio University, B.B.A., 1978

Professional Activities

Board of Directors

  • Association of Business Trial Lawyers (1992-2002) (President, 2001-02)
  • Loyola Law School (2001-present)
  • Los Angeles Area Chamber of Commerce (2003-2008)
  • Ninth Circuit Historical Society (2000-present)
  • Legal Aid Foundation of Los Angeles (1993-2000) (President 1998-1999)
  • California Club (Secretary, 2007-2008)
  • Southern California Leadership Network (2009)

Board of Advisors

  • UCLA School of Public Affairs (2001-2011)

Chair

  • Los Angeles County Bar Association
  • Complex Courts Committee (2000-2005)

Co-Chair

  • Practising Law Institute Securities Litigation and Enforcement Institute (2011)

Member

  • Los Angeles County Bar Association, Litigation Section Executive Committee (1999-2003)

President

  • Chancery Club of Los Angeles, California (2016-17)

Author

  • “Understanding the Laws Behind Securities Transactions” (chapter “A Closer Look at the Laws Governing Securities”), Aspatore Books (2006)
  • “Litigating the Class Action Lawsuit in California,” (chapter “Summary of Selected Topics of California Class Action Law”), National Business Institute (2000)
  • “Emerging Theories of Liability: Corporate Fiduciaries Who Leave to Compete With Their Former Employers,” The Journal of Proprietary Rights, Prentice Hall (April 1991)
  • “A Decade in Review: The Securities Litigation Uniform Standards Act,” The Review of Securities & Commodities Regulation, Vol. 42, No. 8, co-authored (April 15, 2009)
  • “Future of Advancement and Indemnification Rights,” Securities Law360, co-authored (July 10, 2009)
  • “Shareholder Derivative Actions: From Cradle to Grave,” Practising Law Institute, co-authored (2006, 2007, 2008, 2009, 2010, 2011)
  • “Recent Developments and Trends in Securities Litigation,” Practising Law Institute, co-authored (2008, 2009, 2010, 2011)
  • “Securities Litigation Uniform Standards Act: 2008 Update,” Practising Law Institute, co-authored (2008)
  • “Preemption of ‘Holder’ Class Actions Under SLUSA,” The Review of Securities & Commodities Regulation, Vol. 39, No.15, co-authored (September 6, 2006)
  • “Courts Deny Plaintiffs Over Section 304 Suits,” International Financial Law Review (March 2006)
  • “Current Issues Under the Securities Litigation Uniform Standards Act,” The Review of Securities & Commodities Regulation, Vol. 37, No. 6, co-authored (March 31, 2004)
  • “Recent Developments in Shareholder Derivative Actions,” Practising Law Institute, co-authored (2001, 2005)
  • “Securities Litigation Uniform Standards Act – The Year in Review,” Practising Law Institute, co-authored (2003)
  • “Liability for Exchange Act Violations,” Practising Law Institute (2005)
  • “Litigation Under the Securities Litigation Uniform Standards Act,” Practising Law Institute, co-authored (2001, 2002)
  • “Current Issues Under the Securities Litigation Uniform Standards Act,” Practising Law Institute, co-authored (2005, 2006, 2007)
  • “Effective use of Damages Experts in Securities Class Actions,” Practising Law Institute, co-authored (2002)
  • “In Re Silicon Graphics: The Ninth Circuit Raises the Bar for Pleading Private Securities Fraud Complaints,” Practising Law Institute, co-authored (2000)

Lecturer and Panelist

  • Practising Law Institute
  • American Bar Association
  • Los Angeles County Bar Association
  • Association of Business Trial Lawyers
  • Directors Roundtable
  • Association of Corporate Counsel
  • CLE International, National Business Institute
  • Federal Bar Association
  • UCLA Law School
  • Trial counsel in defense of SEC enforcement action against former CFO of Basin Water, Inc., in US District Court. SEC v. Jensen and Tekulve, (C.D. Cal 2013)
  • Defending several Chinese companies in securities class and shareholder derivative actions filed in US courts.
  • Successful defense of Lockheed Martin Corp. in two federal court securities class actions, In re Lockheed Martin Securities Litigation, 272 F. Supp. 2d 938 (C.D. Cal. 2003); aff’d Fed. Sec. L. Rep. (CCH) ¶ 93, 124 (9th Cir. 2005)
  • Lead trial counsel for IBM in a federal court action against computer dealers, distributors, former employees, and others for RICO violations and fraud, resulting in a successful jury verdict and judgments exceeding US$17 million, upheld by the 9th Circuit. IBM v. Brown, et al.
  • Trial counsel for Tenet Healthcare defending action to enforce exercise of stock options. After three-week trial, jury returned defense verdict. (Daily Journal “Top Ten Defense Verdicts of 2002”)
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