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Humberto Ocariz is an experienced litigator and trial attorney in both state and federal court. He regularly serves as first-chair at trial and has deep experience on a range of matters, including complex commercial litigation, class actions, trademark litigation, unfair and deceptive trade practices, trade secrets, product liability, contractual disputes, legal malpractice, fraud and business torts, and international disputes and arbitrations.

Humberto also works closely with foreign counsel in connection with a variety of matters. He was selected to serve as an arbitrator for the International Chamber of Commerce International Court of Arbitration.


  • Complex commercial litigation
  • Class actions
  • International and domestic arbitration
  • Insurance litigation
  • Trademark and trade secrets



  • Represented American Airlines in class action involving claims under travel insurance policy.
  • Represented investors in several bilateral investment treaty disputes regarding seized hotel properties.°
  • Represented American Airlines in RICO/FDUPTA/unjust enrichment class action.°
  • Represented publicly-traded medical device company in contract dispute with supplier.°
  • Represented publicly traded funeral service company in contract litigation over the operation of several cemetery properties.°
  • Represented American Airlines in class action involving operation of its website°
  • Represented fiber optic cable company concerning title to land and easements where cable installed.°
  • Represented European investors in multimillion-dollar fraud claim.°
  • Represented exclusive distributor in arbitration with manufacturer.°
  • Represented a large retailer in employee class action.°
  • Represented various clients in arbitration before AAA, NASD and private arbitrations.°
  • Served as an arbitrator with the International Court of Arbitration.°
  • Represented American Airlines in $60 million trademark dispute.°
  • Represented DuPont in multimillion-dollar product liability actions.°
  • Represented Motorola in a multibillion-dollar trade secrets/patent claim.°
  • Represented Boeing in an air crash case.°
  • Represented The Doctors’ Company in a $20 million legal malpractice action.°
  • Represented National Life Insurance Company of Vermont in $50 million ERISA class action regarding design and administration of pension plan.°
  • Represented Ace Insurance on behalf of various insureds in product liability and high-exposure matters.°
  • Represented MAN Engine in $50 million termination of distributor case.°
  • Represented local school board in construction litigation and lien matters.°
  • Represented foreign business person in dispute seeking to invalidate transfer of $25 million into a foreign trust.°
  • Represented leading art dealer in a $20 million claim against a cruise line.°
  • Represented business person in supplementary proceedings to collect $30 million in judgments where assets being concealed and moved offshore.°
  • Represented developer in $75 million foreclosure/lender liability litigation.°
  • Represented city government in $15 million accounting malpractice claim.°
  • Represented food company in $25 million lease dispute.°
  • Represented Nortel Networks in $10 million termination of distributor case.°
  • Represented buyers of Fred Astaire Dance Studios in multiple seven-figure securities claims against sellers.°
  • Represented mortgage lender in seven-figure claim by Dept. of Housing & Development.°
  • Represented foreign distributor in seven-figure claim against U.S. chemical manufacturer.°
  • Represented wife of professional basketball superstar seeking to invalidate prenuptial agreement.°
  • Represented Miami governmental agency in constitutional challenge to ballot language.°
  • Represented various cities in Florida in numerous lawsuits seeking multimillion-dollar claims against brokers for sale of derivative securities.°
  • De Abreu v. Fernandez, 2017 WL 6506432 (Fla. 3d DCA 2017) (affirming dismissal with prejudice of seven-figure claim against client).°
  • Antar v. Seamiles, LLC, 994 So.2d 439 (Fla. 3d DCA 2008) (reversing trial court judgment refusing to enforce agreement).°
  • Braswell v. Henkel, 160 Fed. Appx. 828 (11th Cir. 2005) (obtaining affirmance of district court dismissal of § 1983 claim under Rooker-Feldman doctrine).°
  • Abele v. Sawyer, 750 So.2d 70 (Fla. 4th DCA 1999) (reversing trial court’s dismissal of lawsuit).°
  • Land O'Sun Realty Ltd. v. REWJB Gas Investments, 685 So.2d 870 (Fla. 3d DCA 1996) (affirming jury verdict in lease dispute).°
  • De Soto v. Guardianship of De Soto, 664 So.2d 66 (Fla. 3d DCA 1995) (reversing trial court judgment regarding distribution of funds).°

°The above representations were handled by Mr. Ocariz prior to his joining Greenberg Traurig, P.A.

Recognition & Leadership

  • Listed, The Best Lawyers in America, Commercial Litigation, 2023-2024
  • Team Member, a Law360 “Product Liability Practice Group of the Year,” 2021
  • Listed, Super Lawyers magazine, Florida Super Lawyers, 2018-2019
  • Selected, Marquis Who’s Who in American Law, 2018
  • Rated, AV Preeminent® 5.0 out of 5.0

°AV®, AV Preeminent®, Martindale-Hubbell DistinguishedSM and Martindale-Hubbell NotableSM are certification marks used under license in accordance with the Martindale-Hubbell® certification procedures, standards and policies.

  • Member, Florida Bar Grievance Committee (11th Circuit Committee “J”), 2017-2019
  • Member, Florida Supreme Court, Supreme Court Committee on Standard Jury Instructions – Contract and Business Cases, 2014
  • Member, Southern District of Florida, Ad Hoc Advisory Committee on Rules and Procedures, 2009


  • J.D., University of Miami School of Law, 1987
    • Order of the Barrister
    • Member, Inter-American Law Review
    • Member, Sports and Entertainment Journal
  • B.B.A., University of Miami, 1983
  • Hon. Alcee L. Hastigs, U.S. District Court for the Southern District of Florida, 1987-1989
  • Florida
  • Spanish, Fluent