Nine Whale Wallets Dominate Polymarket's Disputed Contract Rulings, Control 50% of Voting Power

According to Bloomberg, nine large UMA holders have concentrated control over Polymarket's disputed-contract rulings over the past three years. Of the 6,400-plus addresses that participated in voting on disputes, these nine whales accounted for approximately 50% of UMA voting power and backed the winning side in almost every dispute.

In April 2026, around 230 contracts with combined trading volumes exceeding $10 billion entered the dispute-resolution process, representing less than 1% of Polymarket's total contracts. Some traders criticized the mechanism for giving anonymous whales "fact-deciding power" driven by economic incentives, while Polymarket and Risk Labs have shelved plans to improve the process.