Overview
Ryan Weiss is a trial lawyer who helps individuals and companies of all sizes navigate—and win—high-stakes disputes. He represents both plaintiffs and defendants in all phases of litigation, from pre-suit strategy through trial and appeal, in both federal and state courts nationwide.
Ryan’s practice is intentionally diverse and spans the full spectrum of complex litigation, including energy, financial, probate, employment, real estate, class action, intellectual property, personal injury, and other commercial disputes.
Clients turn to Ryan for his mastery of the record, sound judgment, and relentless preparation—qualities that help him see the case a way a jury will and then zealously advocate for his client’s goals.
LITIGATION HIGHLIGHTS
Ryan plays a central role in every matter he handles. He has examined and defended fact and expert witnesses at trial, argued dispositive and evidentiary motions, and taken and defended numerous critical depositions. Courts have described Ryan’s written advocacy as “excellent” and called him the “linchpin” of his trial teams—a recognition of both his preparation and poise in the courtroom.
Ryan’s practice centers on high-value, high-consequence disputes, often involving extremely complex issues. Among other ongoing matters, Ryan represents Preston L. Marshall, grandson of J. Howard Marshall II, in what has been described as the largest will and trust dispute in the world. This multijurisdictional fight, which spans Texas and Louisiana courts, involves control of the Marshall family’s wealth, which traces to its 16% ownership of Koch Industries. Most recently, after a two-week jury trial, Ryan helped secure a “take-nothing judgment” in a dispute valued at more than nine figures.
In another major win, Ryan secured affirmance of a $17 million summary judgment ruling for Macquarie US Trading LLC, that dismissed breach of contract claims brought by 1701 Commerce Acquisition LLC. Ryan drafted and argued Macquarie’s successful summary judgment motion and earlier persuaded the court to reconsider a key discovery ruling, compelling production of withheld documents that proved central to the win. Read more.
Ryan also helped secure a $39 million recovery for a class of universal life insurance policyholders against ReliaStar Life Insurance Company stemming from ReliaStar’s failure to charge cost of insurance rates in accordance with the terms of its policies. Before settlement, Ryan opposed ReliaStar’s motion for summary judgment in front of Hon. Donovan Frank (D. Minn.). After a lengthy hearing, and in a detailed opinion, Judge Frank denied ReliaStar’s motion and simultaneously granted class certification. (A full transcript of Ryan’s argument here).
BACKGROUND
Before joining Susman Godfrey, Ryan clerked for Judge Michael Daly Hawkins of the U.S. Court of Appeals for the Ninth Circuit and Judge Mark E. Walker of the U.S. District Court for the Northern District of Florida, two brilliant jurists who continue to inspire Ryan to strive to become an excellent attorney. These clerkships provided him with a unique perspective on the inner workings of the bench—this helps him view each case with an eye towards what issues matter most to the judge and jury.
Ryan graduated magna cum laude from Duke University School of Law, where he was the Managing Editor of the Duke Law Journal and competed on both the Moot Court and Mock Trial teams. He remains closely involved with Duke University and currently serves as the Law School Representative on the Duke Houston Board. Ryan graduated cum laude from the University of Florida, where his allegiance to the Gators was first cemented—and remains strong.
Notable Representations
- Marco Consulting Group Trust I, by and through its directed trustee, the Bank of New York Mellon v. Allianz Global Investors U.S. LLC(S.D.N.Y.) Represented an investment trust that asserted breach of fiduciary duty claims relating to investment losses exceeding $170 million following the collapse of Allianz GI’s Structured Alpha Funds. The case settled on confidential terms favorable to Ryan’s client.
- 1701 Commerce Acquisition, LLC v. Macquarie US Trading, LLC. Secured affirmance of a $17 million summary judgment ruling in favor of Macquarie US Trading LLC that dismissed claims of breach of contract by 1701 Commerce Acquisition LLC. Ryan drafted and argued Macquarie’s motion for summary judgment in the trial court. Ryan also drafted a critical motion for reconsideration earlier in the case, which the Court granted. That resulted in 1701 Commerce being ordered to produce documents it had previously withheld, which were central to the team’s summary judgment win. Read more.
- Cotton International, Inc. v. Westin St. John Hotel Co., Inc., et al. (S.D.N.Y. and New York Commercial Division) Spearheaded a two-person team prosecuting claims by Cotton International, Inc. against Westin St. John Hotel Co. Inc. and other related entities that the defendants failed to pay millions of dollars due under contracts relating to restoration and reconstruction efforts following Hurricane Irma and Hurricane Maria. The dispute settled on confidential terms favorable to Ryan’s client.
- Executive Compensation Dispute. Represented the former President and General Counsel of a privately held oil & gas enterprise valued in the eleven figures in a dispute regarding their employment, compensation, and equity in the enterprise. After multiple arbitration hearings, the disputes settled on confidential terms favorable to Ryan’s clients.
- Mirada Energy, LLC v. Continental Resources, Inc. (Colorado) Represents Mirada Energy, LLC in litigation in North Dakota’s Willison basin involving Mirada’s contractual rights to participate in midstream facilities.
- Confidential Energy Client. Negotiated a pre-suit settlement for a mid-stream energy client relating to a contractual dispute over a gathering agreement. The dispute settled on confidential terms favorable to Ryan’s client.
- Advance Trust & Life Escrow Services, LTA v. ReliaStar Life Insurance Co.(D. Minn.) Secured a $39 million deal for a class of universal life insurance policyholders against ReliaStar Life Insurance Company stemming from ReliaStar’s failure to charge cost of insurance rates in accordance with the terms of its policies. In the time leading up to that deal, Ryan opposed ReliaStar’s motion for summary judgment in front of Hon. Donovan Frank (D. Minn.). After a lengthy hearing, and in a detailed opinion, Judge Frank denied ReliaStar’s motion and simultaneously granted class certification. (A full transcript of Ryan’s argument here and the Court’s opinion here can be provided upon request)
- Marshall Probate Litigation (Harris County and Louisiana) Represents Preston L. Marshall, grandson of J. Howard Marshall II, in litigation spanning multiple Texas and Louisiana courts. The disputes involve control of the family’s wealth, which traces to the Marshalls’ 16% ownership of Koch Industries. Most recently, after a two-week jury trial, Ryan secured a “take-nothing judgment” in a dispute valued at more than nine figures.
- In re Astroworld Litigation (Harris County) Defended Live Nation in several-thousand high-profile lawsuits arising from injuries at the 2021 Astroworld Festival in Houston.
- Commonwealth of Kentucky Pension Litigation(Kentucky State Courts and E.D. Ky.) Defended KKR & Co. Inc. in a series of cases relating to the Kentucky Public Pension Authority’s investment in funds of funds. The Kentucky Supreme Court ruled in KKR & Co. Inc.’s favor and dismissed a multi-billion-dollar derivative lawsuit brought against KKR & Co. Inc.
Honors & Distinctions
Honors and Awards
- Rising Star, Texas Super Lawyers (2025, Thomson Reuters)
- Fellow, Texas Bar Foundation (top one-third of one percent of Texas attorneys)
- Managing Editor, Duke Law Journal
- Moot Court Board
- Mock Trial Board
- Dean’s Scholar
Clerkships
- Honorable Michael Daly Hawkins, United States Court of Appeals for the Ninth Circuit
- Honorable Mark E. Walker, United States District Court for the Northern District of Florida
Education
Education
- Duke University School of Law (J.D., magna cum laude, 2016)
- The University of Florida (B.A., Criminology and Law, cum laude, 2013)
Admissions
Admissions
Bar Admissions
- New York
- Texas
Court Admissions
- U.S. Court of Appeals for the Ninth Circuit
- U.S. Court of Appeals for the Federal Circuit
- U.S. District Court for the Southern District of Texas
- U.S. District Court for the Eastern District of New York
- U.S. District Court for the Southern District of New York
Publications
- Removing the “Silencer”: Coverage and Protection of Physician Speech Under the First Amendment, 65 Duke L.J. 801 (2016)
