Voyager investors urge appeals court to revive lawsuit against Mark Cuban and Dallas Mavericks
Investors burned by the collapse of Voyager Digital are asking a federal appeals court to bring back their lawsuit against Mark Cuban and the Dallas Mavericks, reigniting a high‑profile legal fight over celebrity promotion of crypto platforms.
The group of investors has filed a notice of appeal with the U.S. Court of Appeals for the Eleventh Circuit, seeking to overturn a December 2025 ruling by U.S. District Judge Roy K. Altman. In that decision, the judge dismissed the case not on the merits, but on jurisdictional grounds, finding that the plaintiffs had not shown that Cuban or the Mavericks had sufficient connections to the state of Florida.
The appeal takes direct aim at that jurisdictional finding. According to court filings, the investors argue that the lower court erred in concluding that Cuban and the Mavericks could not be sued in Florida despite their promotional activities for Voyager that, in the plaintiffs’ view, reached and affected Florida residents. The investors want the appellate judges to determine whether those activities created enough of a legal nexus with the state to allow the case to proceed there.
In addition to challenging the December dismissal, the appeal also contests Judge Altman’s May 27 order refusing to reopen the case or reconsider his earlier ruling. The notice asks the Eleventh Circuit to review those decisions as well as several earlier interlocutory rulings that were effectively folded into the final dismissal.
The underlying lawsuit was originally filed in 2022, shortly after Voyager Digital spiraled into bankruptcy. The plaintiffs accuse Cuban-well known as the former majority owner of the Dallas Mavericks and an investor on the television show Shark Tank-of using his influence and public profile to promote Voyager’s products and to lend credibility to the platform before it collapsed. The Mavericks organization was also named as a defendant based on its partnership and marketing activities with Voyager.
Investors claim that Voyager offered what they characterize as unregistered securities through its platform, a central allegation that has been at the core of numerous crypto‑related lawsuits across the industry. They further argue that endorsements and promotional messages from Cuban, the Mavericks, and other public figures encouraged ordinary investors to entrust their savings to Voyager, only to see those funds locked up or wiped out when the company failed.
Judge Altman’s December ruling pointedly avoided taking a position on whether Cuban’s statements or Voyager’s marketing were deceptive or misleading. Instead, the decision focused narrowly on personal jurisdiction-whether a Florida federal court was the appropriate place to hear the case. In his opinion, nationwide advertising campaigns and general online promotions were not enough, standing alone, to prove that Cuban or the Mavericks had deliberately and specifically targeted Florida residents.
Because of that conclusion, the court dismissed the lawsuit without prejudice. That legal term is significant: it means the claims were not rejected forever and could potentially be refiled in a different court that clearly has jurisdiction, such as in another state where the defendants have stronger ties or where the alleged misconduct more clearly took place.
The plaintiffs had pointed to several specific examples to try to tie the case to Florida. Among them were statements Cuban made during an October 2021 Mavericks press conference, where he publicly revealed that he had personally invested in Voyager. The complaint also highlighted a team promotion offering $100 in Bitcoin to individuals who downloaded the Voyager app, opened an account, deposited $100, and executed a trade. The investors argue that because these promotions were available nationwide, they naturally reached and influenced Florida residents as well.
Cuban’s legal team pushed back by arguing that the Mavericks’ partnership with Voyager and Cuban’s commentary were aimed at a general audience, not at Florida in particular. They told the court that there was no targeted ad buy, in‑person event, or specific marketing campaign that singled out Floridian investors. Defense attorneys also noted Cuban’s frequent public advice urging people to be cautious with crypto investments, portraying him as someone who regularly warned about risk, rather than recklessly pushing speculative products.
Over the course of the litigation, several other high‑profile figures originally named as defendants opted to settle rather than continue fighting in court. Retired NFL star Rob Gronkowski, NBA player Victor Oladipo, and NASCAR driver Landon Cassill reached a settlement with the investors in 2024, agreeing to pay a combined $2.4 million. That agreement removed them from the lawsuit and left Cuban and the Mavericks as the primary remaining targets of the investors’ claims.
Voyager’s collapse forms the backdrop for all of these legal battles. In July 2022, the company filed for Chapter 11 bankruptcy protection after what it described as a brief but intense “run on the bank” and after the crypto hedge fund Three Arrows Capital defaulted on a massive $650 million loan. As customer withdrawals surged and asset values plunged, Voyager’s business model unraveled, trapping customer funds in the process.
The bankruptcy set off a wave of litigation by customers and investors who alleged they had been misled about the safety of their assets and the regulatory status of Voyager’s products. Lawsuits were not limited to executives and insiders; they also spread to business partners and public figures who had lent their names to Voyager marketing campaigns, as investors searched for deep‑pocketed defendants who might compensate them for their losses.
The appeal now before the Eleventh Circuit sits at the intersection of several important legal and industry developments. One key issue is how courts should treat nationwide digital promotion in the context of personal jurisdiction. Traditional jurisdiction analysis was developed in a world of physical storefronts and geographically limited advertising. Crypto platforms, celebrity endorsements, and online campaigns, by contrast, often reach users in every state simultaneously. The outcome of this appeal could influence how future courts assess whether such marketing creates a sufficient legal “footprint” in a particular state.
Another central question is how far liability can extend for celebrities and sports franchises that endorse financial technology and digital asset products. The Voyager case echoes other high‑profile disputes involving crypto platforms promoted by entertainers and athletes. While each case turns on its own facts, judges are being repeatedly asked to decide where the line lies between aggressive marketing and legally actionable misrepresentation, especially when the underlying product later fails.
For investors, the jurisdictional fight is not simply a technicality; it is about keeping alive a path to potential recovery. If the appeals court agrees that Florida has jurisdiction, the lawsuit will resume in the trial court and the parties will once again confront the substantive allegations about misrepresentation, unregistered securities, and the impact of Voyager‑related promotions. If the Eleventh Circuit upholds the dismissal, the plaintiffs will likely have to decide whether to refile in another jurisdiction-an option that could mean additional delays, higher costs, and new legal hurdles.
From the perspective of celebrities and corporate partners, the case is a reminder of the increasing legal risk surrounding endorsements in the digital asset sector. Agreements that once looked like routine sponsorship deals-naming rights, promotional events, in‑app incentives-are now being scrutinized with the benefit of hindsight. Lawyers and compliance teams are more aggressively reviewing how products are described, what promises are implied, and whether endorsers fully understand the regulatory status of what they are promoting.
The Voyager saga also illustrates how quickly market sentiment and legal exposure can change. At the height of the bull market, crypto lenders such as Voyager were seen as innovative gateways to yield and digital asset trading. When the market turned and key borrowers defaulted, the same business practices came to be viewed as dangerously opaque, under‑regulated, and in some cases potentially fraudulent. Investors’ lawsuits are one channel through which the industry’s risk‑taking is now being reassessed.
For everyday investors, the case underscores several practical lessons. First, promotional campaigns featuring famous names-whether business personalities, athletes, or entertainment figures-do not guarantee that a product is safe, regulated, or appropriate for one’s risk tolerance. Second, platforms offering high yields or complex crypto‑linked products may carry counterparty and regulatory risks that are not immediately obvious from marketing materials. Third, recovery through litigation after a collapse can be slow, uncertain, and heavily dependent on technical legal issues like jurisdiction.
Regulators, meanwhile, are watching the outcome of cases like this as they refine their own enforcement approach. While the Voyager investor lawsuit is a private civil action, not a government case, its allegations resonate with broader regulatory concerns about unregistered securities offerings and misleading marketing in the digital asset space. Appellate decisions on jurisdiction and liability can indirectly shape how regulators frame future actions and what kinds of conduct they highlight as problematic.
For sports organizations and teams, the dispute highlights the importance of due diligence in choosing sponsors and technology partners. Crypto companies, exchanges, and lending platforms often bring lucrative offers and global visibility. Yet aligning a team brand with a financial product that later collapses can generate long‑term reputational damage and legal exposure, even when a team’s role is limited to advertising and promotional activities.
What happens next will depend on the Eleventh Circuit’s timetable and analysis. The appellate court will review the record from the district court, evaluate the legal standards for personal jurisdiction, and determine whether the dismissal was appropriate. That process can take months or longer. During that time, both sides may also assess the possibility of settlements or alternative forums, although there is no guarantee of a resolution outside of continued litigation.
Regardless of the ultimate outcome, the Voyager investors’ appeal against Mark Cuban and the Dallas Mavericks is shaping up as another test case in the evolving law of crypto promotion, investor protection, and cross‑border digital commerce. It reflects a broader shift in which courts are being asked to adapt long‑standing legal doctrines to a world where financial products are distributed online, endorsements travel instantly, and the fallout from a corporate failure can spread across jurisdictions in a matter of days.