PANews reported on May 26th that, according to Bloomberg, the adjudication of disputed contracts on Polymarket is being dominated by a small number of UMA holders. Bloomberg statistics show that of the more than 6,400 addresses that participated in Polymarket dispute adjudication votes over the past three years, just nine large wallets contributed about half of the UMA voting power and were on the winning side in almost all disputes. In April 2026, approximately 230 contracts with a total trading volume exceeding $1 billion entered the dispute adjudication process, representing less than 1% of all Polymarket contracts, but the frequency of disputes increased with the trading volume. Some traders criticized the mechanism, arguing that it effectively grants anonymous whales a "fact-based decision-making power" driven by economic interests, and that plans by Polymarket and Risk Labs, which is responsible for UMA, to improve the process have been shelved.