Marisa Secco Giles

Partner

Commercial & Business Litigation

“Marisa is described by her clients as an ‘assertive, zealous representative’ who ‘is fantastic at producing results,’ ‘a tenacious advocate who is good on her feet,’ and a “tremendous negotiator.” [Chambers USA 2024, 2025 (Client Quotes)]

Marissa Giles

Overview

Marisa is an experienced lead litigator who represents businesses and individuals in high-stakes disputes. Marisa has handled trials and arbitrations across the country, including contract suits, M&A and securities litigation, construction and real estate litigation, tax controversies, restructuring litigation, and complex indemnity and insurance matters.

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Experience

  • In bet-the-company matter, obtained preliminary injunction preventing Texas licensing board from bringing administrative action to revoke client’s approval to train candidates to be classroom teachers; following a favorable settlement and independent audit, client’s state accreditation was restored

  • Represented SPAC in expedited action for specific performance of business combination agreement in Delaware Chancery Court

  • Successfully defended a nationwide operator of student-focused apartment homes against federal and state antitrust claims that it used revenue management software to coordinate prices with competitors; obtained complete dismissal of the claims under Rule 12(b)(6)

  • Defending fintech company in Delaware Court of Chancery against breach of contract and fraud claims brought by SPAC related to terminated de-SPAC transaction

  • Defended golfing corporation in suit for terminating a lease under force majeure; presented briefing and oral argument within a few weeks, ultimately convincing the court to deny temporary injunction and precipitating a settlement shortly thereafter

  • Represented multi-state amenity management company in a trade secret and contract dispute; obtained multiple temporary restraining orders and favorable settlement

  • (Del. Ch.) – Represented sellers of technology company in Delaware Court of Chancery on breach of contract and fraud claims related to sales pipeline and accounting issues

  • Represented joint venture partner in five-day bench trial on breach of Delaware LLC agreement regarding rights of first refusal and sale of interest in joint venture

  • Representing seller of major league baseball team in post-closing merger dispute regarding liability for federal taxes

  • Representing cloud commerce company in post-closing merger dispute regarding sales contracts and post-closing tax liability

  • Defended retailer and certain of its officers in federal securities action and derivative lawsuits in Texas federal court alleging violations of Section 10(b) of the Securities Exchange Act arising from restated financials

  • In advance of summary judgment, obtained favorable settlement of securities fraud claims challenging exploration and production company’s disclosures in merger proxy statement

  • Representing subsidiary of Fortune 500 company in ICC Arbitration in defense and indemnity dispute relating to underlying highway construction dispute

  • Representing terminalling company in complex insurance recovery matter related to fire incident

  • Represented terminalling company in AAA Arbitration in breach of contract suit related to construction services; obtained favorable settlement

  • Defending Fortune 1000 energy company in expedited lawsuit challenging major commercial transaction in Pennsylvania state court 

  • Obtained complete dismissal on behalf of four Texas cities of declaratory judgment suit brought by water district in Texas state court

  • Defending monetary authority in two adversary proceedings alleging fraudulent transfer in bankruptcy court in the Southern District of New York 

  • Represented independent oil & gas services company debtor in Chapter 15 bankruptcy proceedings in Western District of Texas and related adversary class action litigation; obtained complete dismissal of adversary proceeding class action

  • Defended nutrition company against preliminary injunction sought by dissident shareholders in proxy contest  

  • First chair trial attorney in US Tax Court case involving the allocation of income between corporate agent and principals 

  • Prosecuted breach of merger agreement claim with underlying transfer pricing tax issues in Texas federal court and defended related arbitration on behalf of the sellers of an oilfield services company

  • Defending a foreign monetary authority in a federal lawsuit relating to the R. Allen Stanford $8 Billion Ponzi scheme

  • Representing numerous amici in an appeal pending in the Supreme Court of Texas

  • Assisted in obtaining complete dismissal on basis of ERISA preemption of claims by a class of current and former employees against a large insurance company, asserting that the company’s long-term disability policy violated state and federal law 

  • Assisted in representation of a debt-buying entity in a fraud and breach of contract action in federal district court

Credentials

Education

  • The University of Texas School of Law, J.D. with high honors, 2007 (Chancellor; Order of the Coif; Texas Law Review)
  • The University of Texas at Austin, B.A., Government with high honors, 2004

Admissions

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

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Recognitions

  • Chambers USA, Litigation: General Commercial (Austin), 2021–2026; “Up and Coming” in Litigation: General Commercial (Texas), 2021 and 2022
  • Selected to the 500 Leading Litigators in America, Lawdragon, 2023–2026
  • Selected to the Texas Super Lawyers list, Super Lawyers (Thomson Reuters), 2024 and 2025
  • Selected to the Texas Rising Stars list, Super Lawyers (Thomson Reuters), 2016 and 2017
  • Texas Lawyer, Top 20 “Winning Women” litigation and appellate attorneys (Texas), August 2014
  • Legal 500 U.S., Dispute Resolution: General Commercial Disputes, 2025 and 2026; Energy Litigation: Oil & Gas, 2019; Energy Litigation: Electric Power, 2026
  • The Best Lawyers in America© (BL Rankings, LLC), Commercial Litigation (Austin), 2021–2027
Insights

Client Alerts

Texas Business Court Quarterly Update – 2026 Q2 Summaries

In the second quarter of 2026, the Texas Business Court continued to build on the progress of its first two …

July 29, 2026

July 29, 2026 • 31-minute read

Articles

Texas Business Court Caseload Expands and Broadens After House Bill 40 Expands Jurisdiction

The Texas Business Court’s second year is off to a faster start than its first, and the expansion of its …

June 26, 2026

June 26, 2026 • 3-minute read

Client Alerts

Texas Business Court Quarterly Update – 2026 Q1 Summaries

In the first quarter of 2026, the Texas Business Court continued to make progress through the ever-growing number of lawsuits appearing on its dockets. 

April 23, 2026

April 23, 2026 • 20-minute read

Client Alerts

Texas Business Court Quarterly Update – 2025 Q4 Summaries

In the final quarter of 2025, the Texas Business Court closed its first calendar year of operation with a full slate of notable opinions. The Business Court continued to release opinions clarifying its jurisdiction, including on removal requirements and recent changes enacted by House Bill 40.

January 27, 2026

January 27, 2026 • 25-minute read

Client Alerts

Texas Business Court Quarterly Update – Q3 2025

In the third quarter of 2025, the Texas Business Court has continued to release opinions that impact businesses operating in Texas and beyond.

October 20, 2025 • V&E Texas Business Court Quarterly Update

October 20, 2025 • 15-minute read

News & Achievements