In the News

Haynes and Boone Obtains Summary Judgment Victory for Berryhill Hot Tamales

HOUSTON - The Haynes and Boone, LLP team of Houston Partners Matthew Deffebach and Yasser Madriz, Houston Associates Meghaan McElroy and Caroline Dwairy, and Dallas Associate Lindsay Murchison have scored a summary judgment victory for Berryhill Hot Tamales Corporation (BHT), the franchisor of Berryhill Baja Grill & Cantina restaurants. >>

Recent Publications

Diversity Highlights (2013)

The Attorney Diversity Committee (ADC) at Haynes and Boone, LLP is comprised of more than 60 attorneys, management and administrative team members that meets each month to advance our firm’s numerous diversity efforts. This document summarizes the efforts and accomplishments of 2013. >>

Yasser Madriz



1221 McKinney Street
Suite 2100
Houston, Texas 77010
T +1 713.547.2504
F +1 713.236.5690

Areas of Practice


  • J.D., University of Houston Law Center, 2002
  • Honors B.Sc., McMaster University, 1998

Bar Admissions

  • Texas, 2002

Court Admissions

  • U.S. District Court for the Northern District of Texas
  • U.S. District Court for the Southern District of Texas
  • U.S. District Court for the Western District of Texas
  • U.S. District Court for the Eastern District of Texas
  • U.S. Court of Appeals for the Fifth Circuit


  • English
  • Spanish
Yasser Madriz

Yasser Madriz is a partner in the Business Litigation Section. He has extensive experience handling complex, high-stakes commercial litigation and has played key roles in various multi-billion cases filed throughout the United States. His cases cover a range of commercial issues, including business organization and complex transaction-based disputes, franchise-related controversies, energy litigation (oil, gas and power), contract disputes, and insurance and re-insurance coverage claims. Mr. Madriz's Latin American roots and fluency in Spanish have enabled him to develop experience in representing Latin American clients in international and cross-border disputes.

Noteworthy Engagements

  • Defended international energy company in a multi-billion case that resulted in a very favorable settlement.
  • Partnered with other law firms to represent the world's largest semiconductor manufacturer in a multi-billion dollar trade secret litigation case that resulted in a $200 million settlement.
  • Part of legal team that successfully obtained bankruptcy court recommendation and district court confirmation of client's multi-billion plan of reorganization over competing plan in a four-week contested hearing.
  • Part of legal team in bankruptcy adversary proceeding involving administrative claim for approximately $200 million in federal and state income tax payments made on behalf of debtor.
  • Summary judgment in favor of HCC Employer Services, Inc. declaring rights to coverage under errors and omissions insurance policy.
  • Summary judgment in favor of Houston Casualty Company against Lexington Insurance Company for reinsurance coverage arising out of forced evacuation of Universal Studios, Florida.
  • Summary judgment in favor of AMC and Asarco Incorporated against two insurance companies attempting to impute them with multi-million dollar liability.
  • Summary judgment in favor of InMotion Pictures, Inc. dismissing all commercial claims and resulting in a take-nothing judgment.
  • Summary judgment in favor of American Wires in trade secret misappropriation case.
  • Summary judgment in favor of client in discrimination case and resulting in take-nothing judgment.
  • Procured judgment for franchisor for damages, recurring fees, and attorneys' fees for breach of franchise agreement.

Representative Matters

  • Ongoing representation of Latin American and other international companies in cross-border litigation, arbitration and other disputes.
  • Ongoing representation of international energy companies in complex, high-stakes litigation matters, including complicated transaction-based controversies, business organization disputes and derivative suits.
  • Ongoing representation of international franchisors in franchise-related litigation.
  • Ongoing representation of debtors and creditors in bankruptcy and adversary litigation.
  • Ongoing defense and prosecution of agency, underwriter and reinsurance disputes.
  • Ongoing representation of energy companies in toxic tort litigation involving personal injury and property damage claims.
  • Managed large scale e-discovery projects in numerous complex, high-stakes domestic and international litigation matters.

Professional Leadership

  • United Way Young Leader
  • Leadership Council on Legal Diversity Fellow - 2012

Recent Publications

  • "Employees Get What? What Texas Employers Need to Know About Mexican Labor and Employment Law," co-author with Felicity Fowler and Meghaan McElroy, The Houston Lawyer, January/February 2012.
  • "Annual Review of Litigation, Chapter 3: Appellate Practice," contributor, with Kendyl Hanks and Mark Trachtenberg, American Bar Association, Section of Business Law, April 2011.
  • "Working With the Seven-Hour Time Limit for Depositions in Federal Court," co-author with Ben Allen, American Bar Association Section of Litigation, November 17, 2010.
  • "Mergers and Acquisitions in Texas: The Art of Doing Deals"


  • Selected for inclusion in Texas Super Lawyers - Rising Stars Edition 2009-2012

Selected Representative Experience

T H Hill Associates, Inc. v. Jeffrey A. Benson, et al.; Cause No. 2012-75246; In the 152nd Judicial District Court of Harris County, Texas
Obtained temporary injunction against seven former employees for violating their non-competition agreements with T H Hill and for misappropriating T H Hill's confidential, proprietary, and trade secret information after the defendants resigned en masse to service one of T H Hill's international customers on behalf of T H Hill's competitor and former agent.

M7 Capital LLC, v. Theodore B. Miller Jr. a/k/a Ted B. Miller Jr., 11th District Court, 2007
Represented a developer of an aerospace parts business in fraud and breach of contract trial.

Global Trademark Coexistence Agreement
Crafted a trademark coexistence agreement affecting the parties' rights to use and register trademarks throughout the world in connection with retail consumer goods in order to settle a trademark infringement lawsuit.

“Single Employer” Title VII Issue in Franchisor-Franchisee case for Berryhill Hot Tamales
In a matter regarding when a franchisor can be potentially held liable for the acts of one of its independent franchisees, our team obtained summary judgment for a restaurant franchisor, Berryhill Hot Tamales. Our client’s independent franchisee was alleged to have violated Title VII regarding allegations of sexual harassment. The plaintiffs sought to create liability for the franchisor by arguing that it was a joint employer or “single enterprise” along with the franchisee.

Go Figure, Inc. v. Curves Int'l, Inc. (S.D. Tex.-Houston Div. 2011)
Represented health and fitness center company, Curves, in a trademark infringement and antitrust lawsuit involving a software vendor. The software vendor, Go Figure, Inc., sued Curves for declaratory relief related to Go Figure's use of Curves' trademarks as well as for purported antitrust violations under the Sherman Act after Curves developed its own health care management software. After more than two years of litigation on those charges and counterclaims of trademark infringement, the parties proceeded to trial. After only two days of witness examinations, the vendor sought a settlement, providing Curves with a take-nothing judgment and compensation.

American Wires v. Texas Auto Solutions et al. (61st Dist. Ct., Harris County, Tex. 2010)
Represented after-market automobile parts distributor in case involving breach of a non-competition agreement and misappropriation of confidential information. We obtained a partial summary judgment and judgment after a bench trial on both of claims in the approximate aggregate amount of $795,000, in addition to a permanent injunction restraining the defendants from continuing to misappropriate the client's confidential and proprietary information.

In re ASARCO, LLC, No. 05-CV-21207 and related adversary proceedings (Bankr. S.D. Tex.) (confirmation Nov. 13, 2009); Nos. 09-CV-177 and 07-CV-00018 (S.D. Tex.)
In a closely watched multi-billion dollar Chapter 11 restructuring of a copper mining company labeled by the district court as "one of the most successful bankruptcy proceedings in recent history," represented the debtor's parent company and worked with bankruptcy, litigation, and labor teams in contested matters, adversary proceedings, and bankruptcy appeals to the district court and Fifth Circuit. These matters included an $11 billion fraudulent transfer, fiduciary duty, conspiracy and aiding and abetting adversary proceeding; litigation of novel issues pertaining to a long-standing labor dispute and the enforceability of a collective bargaining agreement and its successorship clause; disputes regarding proposed acquisition and auction of the debtor's assets; environmental claims and asbestos liability issues; and successful confirmation of the proposed plan of reorganization by both the bankruptcy court and district court.

ASARCO LLC v. Americas Mining Corp. (In re ASARCO LLC), Adversary No. 07-02011 (S.D. Tex.)
Assisted bankruptcy and tax counsel with briefing and argument of novel issues of law and preservation of error in adversary proceeding between parent company and wholly-owned, "disregarded" entity over ownership of a $50 million tax refund, liability for more than $100 million in post-petition federal income taxes owed under tax sharing agreement, and liability for taxes attributable to $600 million deferred intercompany gain.

Business Tort and Fiduciary Litigation
Representing a publicly traded energy company in litigation involving ownership disputes and allegations of breaches of fiduciary duties.

Houston Casualty Company v. Lexington Insurance Company (S.D.Tex., 2007)
Summary judgment in favor of client declaring rights to coverage under insurance policy.

Dynegy Inc. Securities and Derivative Litigation
Represented Dynegy Inc. in putative securities class action and in shareholder derivative suits arising from allegations of fraudulent accounting treatment of certain energy contracts and a natural gas transaction, and from purported energy market manipulation.

HCC Employer Services, Inc. v. Westchester County Surplus Lines Ins. Co., 2006 WL 1663343 (S.D.Tex., 2006)
Summary judgment in favor of client declaring rights to coverage under errors and omissions insurance policy.

Enron Corporation Securities Litigation
We are defending a major investment banking firm in multi-district litigation arising out of the collapse of Enron Corporation and involving single institutional plaintiff and class action suits.

Employer Incentive Compensation Plan Ligation
Complete defense award in an arbitration challenging stock forfeiture provisions in national employer’s employee incentive compensation plan, arbitrated in Houston, Texas.

BHT Franchise Corporation v. Houston Franchise Partners LLC, et al.
Procured judgment for franchisor for damages, recurring fees, and attorneys' fees for breach of franchise agreement.

Semiconductor Trade Secret Litigation
Partnered with other law firms to represent a major international semiconductor-manufacturing company - Taiwan Semiconductor Manufacturing Company (“TSMC”) - in a trade-secret case pending in California state court against a Chinese fab, SMIC.

TAG Electric of Houston, L.P. v. InMotion Pictures, Inc.
Summary judgment dismissing all commercial claims against our client, InMotion Pictures, Inc.


  • American, Texas, and Houston Bar Associations
  • Houston Bar Association
  • Texas Young Lawyers Assocation
  • Houston Young Lawyers Association

Online Publications

03/08/2012 - The Houston Lawyer Guest Article: What Texas Employers Need to Know About Mexican Labor and Employment Law
Before entering an unknown business market, employers must be apprised of the labor and employment laws governing the employer-employee relationship in that jurisdiction.

11/17/2010 - Working With the Seven-Hour Time Limit for Depositions in Federal Court
Haynes and Boone associates Yasser Madriz and Ben Allen explore strategies for ensuring enough time to examine witnesses in light of the seven-hour time limit for depositions in federal court.