O’Melveny Worldwide

Marc Feinstein has extensive experience representing companies and individuals in significant civil litigation through trial and appeal. His practice includes a wide range of disputes in arbitration or court around the country related to contract disputes, real estate litigation, construction matters, partnership disputes, technology license claims, fraud and fiduciary duty claims, tortious interference claims, derivative suits, bankruptcy and receivership proceedings, judgment enforcement, recognition of foreign arbitration awards and judgments in US courts, and other matters. He has successfully handled numerous arbitrations under the JAMS and AAA Rules. Marc’s clients involve both plaintiffs and defendants across an array of industries, and he has obtained judgments and settlements of more than US$350 million for his clients.

Marc has a strong record winning at trial and is a skilled advocate in the courtroom – notably, after his examination of a key witness led the other side to surrender in the middle of trial, Marc’s client presented him with a framed book entitled, “Expert Witnesses I’ve Destroyed on the Stand.” He is recognized as a “Super Lawyer” in a survey conducted by Law & Politics Media Inc. and published in Los Angeles Magazine.

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  • Obtained trial victory for memory chip maker in dispute over a supply contract
  • Achieved favorable defense settlement in family dispute involving contract, fiduciary duty, and elder abuse claims for hundreds of millions of dollars
  • Obtained trial victory for medical implant maker in arbitration defending contract dispute over payment of royalties
  • Obtained trial victory for steel trading company in arbitration asserting claims for breach of contract and fraud relating to structured finance transactions
  • Obtained trial victory for major office products retailer in arbitration defending contract claims over termination of lease
  • Obtained trial victory for shareholder in arbitration to recover attorneys’ fees and costs incurred as prevailing party in state court case
  • Obtained trial victory for real estate developer in arbitration involving dispute over construction of large housing development
  • Obtained trial victory on behalf of investors in hedge fund in arbitration prosecuting claims against fund manager for breaches of contract and fiduciary duty, recovering $45 million for investors
  • Obtained trial victory for major US-based apparel maker in arbitration defending claims by foreign supplier over termination of purchase agreement.
  • Obtained trial victory for world leader aerospace company in arbitration defending claims for breach of contract against foreign government in connection with sale of military reconnaissance aircraft
  • Represented California government agencies overseeing rail lines in arbitration against railroad company for breach of long-term maintenance agreements
  • Defended global financial institution in arbitration brought by former senior employees asserting contract and fiduciary duty claims relating to right to distributions from hundreds of real estate projects
  • Represented real estate investor in bench trial concerning disputes with landlord over assignment and termination of shopping center ground lease
  • Represented port terminal operator in connection with potential arbitration with shipping lines over payment of fees for services
  • Represented seller of company in contract dispute with buyer in Delaware court over reasonable best efforts clause
  • Represented minority shareholder in dispute with majority shareholder in Delaware court involving ownership and control of insurance company
  • Recovered more than US$200 million in fraud suit against foreign companies related to corporate acquisition
  • Recovered more than US$100 million in family dispute involving privately held company  
  • Obtained summary judgment for investor in startup company asserting claim for breach of shareholder voting agreement
  • Represented bank lender in receivership proceedings and court-appointed receiver in prosecuting claims for misappropriation of collateral, resulting in successful recovery exceeding US$10 million
  • Defended world leader aerospace company in bench trial over claim that it corruptly obtained major military contract with foreign government, causing foreign trade agent to lose large commission
  • Obtained trial victory for defendant chip maker in high-profile technology license dispute between two Silicon Valley competitors
  • Represented major office products retailer in favorable settlement of consumer class action 
  • Obtained dismissal of defamation suit against national magazine publisher through anti-SLAPP motion 
  • Successfully brought suit by online game company to stop former partner from continuing to operate game
  • Successfully obtained stay and early dismissal of fraud and RICO claims against Hong Kong-based company 
  • Successfully brought declaratory relief suit to avoid termination of distribution agreement 
  • Obtained summary judgment for world leader aerospace company in contract dispute with foreign lobbyist over commissions due
  • In management-led buyout of publicly held real estate company, secured favorable settlement of shareholder class action and individual suit by outside bidding group 
  • Represented major television network in novel class settlement of copyright infringement action for use of music in three popular daytime soap operas 
  • During trial, achieved favorable settlement of securities fraud class action on behalf of personal computer maker


Bar Admissions

  • California
  • District of Columbia

Court Admissions

  • US District Court, Southern and Central Districts of California
  • US Court of Appeals, Second and Ninth Circuits


  • Harvard University, J.D., 1991: cum laude
  • Harvard Business School, M.B.A., 1991
  • Yale University, B.A., 1985: summa cum laude; distinction in Economics

Honors & Awards

  • Named “Super Lawyer” in survey conducted by Law & Politics Media Inc. and published in Los Angeles Magazine

Professional Activities


  • Legal Aid Foundation of Los Angeles, Executive Committee Member, Governance Committee Chair 


  • Association of Business Trial Lawyers


  • Marc teaches annual program on taking depositions and has led seminars for in-house counsel on various topics