- Nine anonymous cryptocurrency wallets have amassed roughly half of all UMA tokens that vote to resolve Polymarket disputes, giving them de facto control over who wins and loses on contested bets worth billions of dollars.
- The nine wallets have essentially always voted together and for the winning side — a pattern that critics say allows the biggest token holders to tip outcomes in their own financial favor rather than toward factual accuracy.
- Over the past year, nearly 2,000 Polymarket contracts were resolved through the UMA dispute process; in April alone, 230 contracts representing more than $1 billion in trading went through the system — up from 79 contracts six months earlier.
- Eigen Labs, which was working with Polymarket and Risk Labs on a revamp of the resolution mechanism, says the project has been put “on pause” — leaving the whale-dominated system in place as trading volumes continue to surge.
What Happened?
A Bloomberg News analysis of blockchain records found that nine anonymous wallets control approximately half of all UMA tokens that have voted to resolve Polymarket prediction market disputes over the past three years — out of more than 6,400 accounts that have participated in at least one vote. Under Polymarket’s rules, when a contract outcome is challenged, UMA token holders vote to determine the winner, with voters on the winning side receiving a financial reward. The mechanism was designed as a decentralized “truth machine,” but in practice it has concentrated power in the hands of whoever holds the most tokens. The nine dominant wallets have voted together and for the winning position with near-perfect consistency. Critics, including prominent trader Domer, say the system allows whales to manipulate outcomes for their own financial benefit. Polymarket and Risk Labs had acknowledged the problem and were working on a fix, but Eigen Labs — a key partner in that effort — confirmed the project is now on pause.
Why It Matters?
Polymarket has become a widely cited source of real-time forecasts on elections, wars, and geopolitical events, attracting $9 billion in bets last month alone and investment from Intercontinental Exchange. But if the resolution mechanism that decides who wins contested bets is effectively controlled by nine anonymous wallets with financial incentives to coordinate, its claim to be a decentralized truth market collapses. The controversy is structurally similar to the LIBOR manipulation scandal — a small group of insiders with the ability to move a benchmark that the broader market trusted as objective. The difference is scale: LIBOR affected trillions, but Polymarket’s reputational damage could accelerate its loss of market share to rival Kalshi, which uses internal employees to resolve disputes — a less elegant but more legible system.
What’s Next?
Polymarket faces a credibility crisis at the worst possible moment — just as it is trying to grow into a mainstream financial platform. Watch whether the company deploys its override power (it can reverse UMA decisions but rarely does) in high-profile cases to reassert control, or whether it fast-tracks a new resolution mechanism now that the Eigen Labs collaboration has stalled. The grassroots UMA.rocks coalition, which now accounts for 8% of votes, is trying to counterbalance the whales but has itself been accused of becoming a new centralized power. Long term, the episode is a stress test for whether decentralized governance can scale in a high-stakes financial context — and the early evidence is not encouraging.
Source: Bloomberg
