Gregory J. Casas: Lawyer with Greenberg Traurig, LLP

Gregory J. Casas

Houston,  TX  U.S.A.

Peer Rating
AV® Preeminent

Client Rating

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Practice Areas

  • Litigation
  • Antitrust & Trade Regulation
  • Life Sciences & Medical Technology
  • International Dispute Resolution
  • Global Energy & Infrastructure
Contact InfoTelephone: 713.374.3500
Fax: 713.374.3505
University Boston University, B.A., English/Economics, magna cum laude, 1990
Law SchoolDuke University School of Law, J.D., 1993
Admitted1993, Texas; 1997, District of Columbia; U.S. Court of Appeals for the Fifth Circuit; U.S. Court of Appeals for the First Circuit; U.S. Court of Appeals for the Third Circuit; U.S. Court of International Trade; U.S. District Court for the District of Columbia; U.S. District Court for the Eastern District of Texas; U.S. District Court for the Southern District of Texas; U.S. District Court for the Western District of Texas

Professional & Community Involvement

•Board Member, Ballet Austin
•Advisory Board Member, Institute of Transnational Arbitration
•Board Member, U.S./Mexico Bar Association
•Former U.S. Co-Chair, Energy Committee
•Member, American Bar Association, Antitrust Section
•Member, Austin Bar Association
•Member, District of Columbia Bar
•Member, State Bar of Texas

LanguagesSpanish, Conversational
BornJersey City, New Jersey, 1969

Gregory J. Casas focuses his practice on antitrust, complex business litigation and international disputes, and energy and natural resources law. Greg's antitrust and complex business litigation practices are international in scope. His antitrust practice includes litigating price-fixing, bid-rigging, and market allocation claims, and providing counseling for DOJ/FTC investigations, joint venture formation, mergers and acquisitions, pricing plans, and other contractual relationships. Greg's complex business litigation experience includes international dispute resolution, arbitration and class action litigation. He has experience litigating commercial contractual disputes, real estate litigation, and construction disputes. His international practice also includes arbitration and other dispute resolution procedures in Latin America, Europe and Africa. His energy experience includes litigating power plant disputes, disputes arising out of oil and gas leases and joint operating agreements, issues related to pipeline transmission disputes, and product liability claims relating to oil field tools and supplies.

Areas of Concentration

•Energy and natural resources
•Class action defense
•Intellectual property litigation

Associated News & Events

Press Releases

06.03.15 15 Greenberg Traurig Texas Attorneys Included in 2015 Chambers USA Guide
05.22.15 Greenberg Traurig Attorneys, Practices Included in the 2015 Chambers USA Guide
10.01.14 Greenberg Traurig's Gregory J. Casas Speaks on Improving Competition Conditions in Mexico at U.S.-Mexico Bar Association Annual Meeting
09.22.14 19 Greenberg Traurig Texas Attorneys Named 2014 Texas Super Lawyers
09.19.13 18 Greenberg Traurig Texas Attorneys Named 2013 Texas Super Lawyers
04.12.11 Ten Greenberg Traurig Texas Attorneys to be Ranked in Chambers USA 2011 Edition
11.05.10 Greenberg Traurig Attorney Gregory J. Casas Named a Board Member of the U.S.-Mexico Bar Association
09.13.10 Fifteen Greenberg Traurig Texas Shareholders selected as Super Lawyers by Texas Super Lawyers Magazine
12.21.09 Greenberg Traurig Launches Environmental and Energy Law Blog
09.24.09 Greenberg Traurig Attorneys Gregory J. Casas and John S. “Chip” Rainey Speak at Carbon Capture and Storage World Summit


02.12.15 Fitting Cloned Horses Through the Eye of American Needle - Fifth Circuit Raises Doubts About Organizations Capable of Conspiring With Their Members
02.12.15 Antitrust Quarterly, Winter 2015
03.03.14 Antitrust Quarterly, Winter 2014
02.27.14 Second Circuit Reinforces Tough Predatory Pricing Pleading Standards-Can Anyone Properly Plead a Predatory Pricing Claim?
02.27.14 Antitrust Quarterly, Winter 2014
11.18.13 Assistant Attorney General Baer Reports on Recent Developments in DOJ Remedies and Enforcement Policies
11.18.13 Antitrust Quarterly, Fall 2013
02.28.13 Antitrust Quarterly, Winter 2013
08.29.12 Antitrust Quarterly, Summer 2012
06.07.12 Antitrust Quarterly, Spring 2012

Articles, Publications, & Lectures


•Author, 7th Circuit Affirms Dismissal of Per Se Claims Against Agreements Not to Compete as Justified by Productivity Benefits, Antitrust Quarterly, Winter 2013
•Author, Seventh Circuit Dismisses Unusual Derivative Action Challenging Interlocking Directorate, Antitrust Quarterly, Summer 2012
•Author, Ninth Circuit Again Declares that Requiring Consumers to Purchase Undesired Television Channels Is Lawful under the Sherman Act, Antitrust Quarterly, Spring 2012
•Author, State Parens Patriae Actions Cannot Be Consolidated with Class Actions, Antitrust Quarterly, Fall 2011
•Author, The DOJ's New Merger Remedies Guides and the Joint Revised HSR Rules, Antitrust Quarterly, Summer 2011
•Co-Author, International Arbitration - Clean Development Mechanism (CDM) Projects, 2008
•Co-Author, Wind Power Article, The ICC UK Official Energy Handbook, 2008
•Co-Author, The Clean Spark Spread: How Greenhouse Gas Legislation Will Impact the Cost of Producing Power, Electric Light & Power, November/December 2007
•Author, A Look at U.S. and EU Merger Analysis, February 20, 2004
•Author, International Arbitration: Issues to Consider When Disputes Arise Abroad, December 10, 2002
•Author, United States Antidumping Laws: Description of Procedural Process and Strategic Issues, December 7, 2002
•Author, A Look at Recent Developments in U.S. and EU Merger Analysis: the United States v. Microsoft Settlement and the Road Ahead, June 13, 2002


•Speaker, U.S.-Mexico Bar Association Annual Meeting & Conference, Cross-Border Issues Arising from Mexico's New Competition Law, Mexico City, Mexico, October 2014
•Speaker, U.S.-Mexico Bar Association Annual Meeting & Conference, Mexico's Potential Energy Reform and Policy, Mexico City, Mexico, November 2012
•Speaker, U.S.-Mexico Bar Association Annual Meeting & Conference, Key Issues in International Litigation and Dispute Resolution, Houston, TX, November 2011
•Speaker, Carbon Capture & Storage Seminar, Washington, D.C., 2010
•Speaker, Carbon Markets in North America Conference, Miami, FL, January 2009
•Presenter, Met Coke World Summit, Chicago, IL, October 2008
•Speaker, The Eurocoke Summit, Prague, Czech Republic, April 2008
•Speaker, Emerging Opportunities in Carbon Markets Conference, January 2008
•Presenter, Hospital Mergers under Antitrust Attack, Strafford Publications CLE Teleconference, January 2006
•Presenter, Avoiding the Pitfalls of Gun-Jumping in Mergers and Acquisitions, Strafford Publications CLE Teleconference, May 2006
•Presenter, The Antitrust Enforcement on U.S. Entities: The Aftermath of GE - Haywood, Strafford Publications CLE Teleconference, March 2006
•Speaker, IQPC: Contract Risk Management Seminar, July 19, 2004

Awards & Recognition

•Listed, Chambers USA Guide, 2012 and 2015
•Listed, Super Lawyers magazine, Texas Super Lawyers, 2010-2014
•Rated, AV Preeminent 5.0 out of 5

AV, BV, AV Preeminent and BV Distinguished are registered certification marks of Reed Elsevier Properties Inc., used under in accordance with the Martindale-Hubbell certification procedures, standards and policies. (Also at Austin Office)

Reported CasesSignificant Representations: Represented Houston-based hedge fund in suit arising out of a failed investment in a film finance company. The fund asserted claims for fraud and negligent misrepresentation. Matter settled on favorable terms to the fund.; Coordinating Counsel for a national natural and organic foods grocery chain in various disputes in New Jersey, New York, Connecticut, Arizona, Florida, California and Illinois.; Represented West African nation in multiple disputes involving the development and sale of that country's natural resources in proceeding before the ICC and ICSID, including representation of the country in the first ever Conciliation under ICSID's Additional Facility Rules.; Represented medical equipment rental company in antitrust action in East Texas. Claims involved monopolization, restraint of trade and common law conspiracy.; Represented agency of eastern European country in MDL proceedings involving antitrust claims related to sale of certain commodities. Claims included allegations of supply manipulation in order to artificially inflate and maintain prices worldwide.; Represented Chinese-based designer and fabricator of semiconductors in claims against competitors related to financing and building a new fabrication plant in China. Claims included tortious interference, business disparagement, theft of trade-secrets and civil conspiracy. Defendants were located in China and Japan.; Provided counseling and represented domestic and international clients regarding Hart-Scott-Rodino filings and related Second Requests before the U.S. Department of Justice and Federal Trade Commissions. Industries involved included agriculture, gasoline, natural gas, transmission, gasoline and crude oil transmission and refining, health care, hotels, and financial services.; Represented Caribbean oil and gas producer in arbitration before the International Chamber of Commerce(ICC) regarding the purchase of offshore oil and gas leases.; Obtained a multimillion-dollar unanimous jury verdict plus interest and attorneys' fees on behalf of client after six days of trial in federal court in Houston. Client brought the case against one of its former distributors seeking payment for product the distributor had already sold. The case involved more than 500 exhibits and complex accounting issues.; Defended a super-major oil and gas company in a class action brought in Latin America by all purchasers of retail gasoline against several of the super-major oil companies. The case involved allegations that the oil companies were not providing gravity adjusted pricing for gasoline sold in hot climates.; Represented hospital group in Puerto Rico involving antitrust compliance, litigation, mergers and acquisitions, and government contracting.

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Office Information

Gregory J. Casas

1000 Louisiana, Suite 1700
HoustonTX 77002


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