Polymarket taps Goldman’s Lisa Mantil as prediction-market scrutiny mounts

Analysis
Polymarket's hire of Lisa Mantil, a nearly three-decade Goldman Sachs partner who ran its ETF accelerator, signals a deliberate pivot from retail event betting toward institutional block-trade flow, a segment prediction markets have struggled to capture. The appointment lands while state attorneys general, federal regulators, and DC lawmakers intensify scrutiny of event contracts, so the growth mandate and the compliance burden are arriving simultaneously. Kalshi's privately negotiated block trade in April, followed roughly a month later by Polymarket's international venues, shows the tooling race is already underway and that venue choice for large positions may hinge on regulatory clarity rather than liquidity alone. Watch whether Polymarket's US-regulated exchange wins institutional onboarding, how the sports event-contract jurisdiction fight resolves, and whether Mantil's Wall Street network converts into announced block-trade volume.

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Polymarket has confirmed the appointment of Lisa Mantil as head of institutional growth. Mantil was a partner at Goldman Sachs and was there for nearly 3 decades.  The move is seen as a wager on Wall Street money, and it happens as regulators, state AGs, and lawmakers in DC place more attention on prediction markets. From the ETF accelerator to an “exploding asset class”  Mantil exited Goldman as a partner and global head of the ETF accelerator, Goldman’s in-company program that assisted clients in shipping new investment products to market. CEO and Founder Shayne Coplan, in a statement, said that Mantil’s network in the world of Wall Street makes her the best choice for the job. Mantil also chimed in, framing her appointment as an opportunity to “help shape an exploding asset class at an inflection point in its development.” Mantil’s appointment is one of many senior hires Polymarket has made in recent times. The company hired Warren Jenson, formerly of Amazon, Delta Air Lines, and Nielsen, as its first CFO.  In May, Polymarket launched its US-regulated exchange and is currently valued at approximately $21 billion, after raising $1 billion from the likes of 1789 Capital and Intercontinental Exchange.  Courting the block-trade crowd Mantil has been asked to bring large traders to the platform, a feat that has previously eluded prediction markets. Institutional adoption is in its infancy, partially due to operators and state regulators squabbling over the right to govern sports-related event contracts.  The tooling is being brought up to speed. Kalshi, a competitor of Polymarket, carried out the first block trade in the prediction market space. The trade occurred in April and was a privately negotiated deal designed to shift large positions without affecting prices.  Polymarket’s international platforms followed suit almost a month after. Investigators already asking questions…

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