Highest ROI trades on Polymarket
The biggest return-on-cost trades that hit — someone took a long-shot position and it paid. Ranked by ROI (profit ÷ cost), from every resolved position on-chain. Click any trader to explore their full history.
Top trade
Wh…an turned $553.89 into $13.1K
22.6× ROI
| # | Trader | Market | Entry | Cost | Profit | ROI | |
|---|---|---|---|---|---|---|---|
| 1 | Wh…an | Will Andy Burnham be the next Prime Minister of the United Kingdom in 2026? | 4.2¢ | $553.89 | +$12.5K | 22.6× | Jul 20, 2026 |
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ROI = realized profit ÷ cost basis on a single resolved position. Past performance does not predict future results. Not financial advice.