Polymarket dispute resolutions dominated by nine whale addresses, critics raise concerns

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Summary

Whale activity on Polymarket has come under scrutiny as nine UMA whale addresses control nearly half of the dispute voting power. Since 2023, over 6,400 addresses have voted on dispute resolutions, yet whale movements have consistently aligned with winning outcomes. In April 2026, 230 contracts with over $10 billion in volume entered dispute resolution—less than 1% of all contracts. Critics argue the system grants whales disproportionate influence, while proposed reforms remain stalled.

BlockBeats report: On May 26, dispute resolutions on Polymarket are being dominated by a small number of UMA holders. Statistics show that among over 6,400 addresses that have participated in Polymarket dispute resolution voting over the past three years, just nine whale addresses account for approximately half of all UMA voting power and have sided with the winning outcome in nearly all disputes. In April 2026, around 230 contracts with total trading volumes exceeding $1 billion entered the dispute resolution process, representing less than 1% of all Polymarket contracts, but the frequency of disputes increases with trading volume.

Some traders have criticized the mechanism for effectively granting anonymous whales economic power to make de facto decisions, and the planned improvements to the process by Polymarket and Risk Labs, which oversees UMA, have been put on hold.

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