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Story summary
- Polymarket hired Lisa Mantil as head of institutional growth.
- Mantil previously served as a Goldman Sachs partner and global head of its ETF accelerator.
- Polymarket launched its U.S. exchange in May 2026.
- Polymarket’s international platform on Polygon blockchain completed its first block trade in May 2026.
- Kalshi completed the first block trade on a prediction-market exchange in April 2026.