Polymarket and Chief Executive Officer (CEO) Shayne Coplan are facing a lawsuit over the settlement of a prediction market on whether Strategy (formerly MicroStrategy) sold Bitcoin (BTC) before May 31, 2026. The plaintiffs claim the Polymarket should have resolved Yes based on Strategy’s SEC 8-K filing disclosing a 32 BTC sale between May 26-31.
On July 3, 2026, two Polymarket traders, William Wood and Thomas Bush, filed a lawsuit in the New York Supreme Court against Polymarket, alleging the platform improperly resolved a prediction market tied to Strategy’s BTC sales.
The suit represented by Burwick Law, PLLC, claims breach of contract and deceptive practices. It names Polymarket-affiliated entities, CEO Shayne Coplan, Chief Marketing Officer Matthew Modabber, and other executives, and seeks damages related to the contested market outcome.
The plaintiffs filed the lawsuit because they believe Polymarket incorrectly resolved a high-volume prediction market to “No,” denying payouts on their “Yes” positions despite clear evidence of Strategy’s qualifying BTC sale.
The contested Polymarket bet asked whether or not Strategy would sell any BTC before May 31, 2026. A June 1 SEC Form 8-K disclosed a 32 BTC sale completed between May 26 and May 31, which the plaintiffs argue fulfills the market’s resolution criteria.
However, because the disclosure occurred a day after the deadline, Polymarket added a note that “confirmation achieved outside of the market’s timeframe does not qualify.” The contract resolved “No” after 98.6% UMA token holders voted in favor of the outcome.
Furthermore, the plaintiffs claim the retroactive rule change undermined the platform’s promise of objective, rules-based outcomes. The lawsuit seeks the $1-per-share value of their Yes positions, plus damages, legal fees, and other relief.
The lawsuit comes amid Polymarket’s rapid growth, with its main platform seeing $10.7B in trading volume in June 2026 alone and its U.S. platform reporting $3.25B, driving its annual revenue run rate to over $1B. However, the dispute threatens to raise concerns over resolution transparency as user activity and market scrutiny continue to increase.
The case adds more pressure on Polymarket’s resolution criteria, which is based on UMA’s token-weighted oracle to resolve contested outcomes. This controversy, one of the platform’s most significant since the Zelenskyy suit market, has further fueled criticism as Polymarket has seen over 1,150 markets contested in 2026, surpassing the previous full-year total.
The broader market, including competitors such as Kalshi, could face growing scrutiny over governance, market integrity, and consumer protection standards. How platforms address resolution disputes and regulatory challenges could shape the industry’s future adoption. Greater transparency and reliable resolution systems could support adoption, while repeated disputes may increase regulatory pressure, and weaken user confidence.
Related:Trader Alleges Unfair Polymarket Ruling Cost Him $500K in Strategy Bitcoin Market
