Polymarket Traders Sue Platform Over Disputed Bitcoin Sale Payout
Quick Look
- Two Polymarket traders are suing the prediction market platform and its executives, alleging breach of contract and deceptive practices.
- They claim Polymarket rewrote rules after the fact to deny them a payout on a market tied to Strategy's Bitcoin sale, which occurred within the specified timeframe but was disclosed after the deadline.
AI-generated summary
Why It Matters
Two traders are suing Polymarket, a prediction market platform, claiming it unfairly denied them a payout by altering market rules retroactively. The dispute centers on a market related to Strategy's Bitcoin sale, which occurred within the timeframe but was disclosed after the deadline.
Two Polymarket traders are suing the prediction market platform, claiming it rewrote a market's rules after the fact to deny them a winning payout tied to Strategy's Bitcoin sale.
William Wood and Thomas Bush filed the complaint in the New York Supreme Court on July 3, naming Polymarket CEO Shayne Coplan and chief marketing officer Matthew Modabber.
They allege breach of contract, breach of the implied covenant of good faith and fair dealing, unjust enrichment in the alternative, deceptive acts and practices, and false advertising, and are seeking the $1-per-share value of their "Yes" shares, plus damages and legal fees.
Strategy’s disputed Bitcoin sale
The disputed market asked whether Strategy would sell any Bitcoin by May 31. The Michael Saylor-led firm did exactly that, disclosing in a June 1 SEC filing that it sold 32 BTC between May 26 and 31, its first such sale since 2022. However, because the disclosure landed a day after the deadline, Polymarket added a note that "confirmation achieved outside of the market's timeframe does not qualify," and the contract resolved "No" after a vote by holders of UMA, the oracle Polymarket uses to settle disputes.
It would not be Strategy's last sale: the company has since outlined a plan to sell up to $1.25 billion more to fund its dividends, and this week offloaded some $216 million in Bitcoin under its “BTC monetization program.”
The plaintiffs contend that Strategy's filing was unambiguous proof under the market's own rules, which designated the company's disclosures as the primary source, and that adding a confirmation deadline afterward gutted Polymarket's promise of objective outcomes. A market that won't honor a proven event, the complaint says, "does not seek truth; it controls payout."
Disputed markets
Polymarket has logged more than 1,150 disputed markets in 2026, already past last year's total, and investigations by Bloomberg and the Wall Street Journal found that a small cluster of large wallets swings many outcomes, with many UMA voters also holding stakes in the markets they judge.
The Strategy fight was the platform's biggest since a $237 million market last year over whether Ukraine's president wore a suit. Burwick Law, which brought the case, said it is weighing similar claims from other traders.
Open Questions
- Will Polymarket face more lawsuits?
- How will this impact prediction market regulation?
- Will UMA voters be scrutinized further?
