TL;DR:
- Lisa Mantil, a Goldman Sachs partner for nearly three decades and global head of its ETF accelerator, took on the role of Head of Institutional Growth at Polymarket.
- The prediction market platform carries an estimated $21 billion valuation after closing a $1 billion funding round with firms including Intercontinental Exchange and 1789 Capital.
- The Commodity Futures Trading Commission (CFTC) maintains three formal investigations open into specific contracts traded on the platform this year.
Polymarket taps former Goldman Sachs partner Lisa Mantil, who spent nearly three decades at the banking giant, to join its executive ranks. With this hire, the prediction market aims to attract liquidity from Wall Street institutional investors.
Mantil previously led Goldman Sachs‘ global exchange-traded fund (ETF) accelerator, a unit focused on structuring and bringing new investment vehicles to traditional markets. Market reports indicate that the executive described her appointment as an opportunity to shape the market structure of a fast-growing, emerging asset class.
This addition follows the appointment of Warren Jenson, a former Amazon and Delta Air Lines executive, as the company’s Chief Financial Officer. The firm is working to fortify its executive bench and infrastructure following the launch of its regulated U.S. exchange in May 2026.
Attracting institutional capital requires execution tools capable of handling large transaction blocks without causing significant price slippage. Industry data indicates that the prediction market sector has begun adopting privately negotiated block trades, an institutional mechanism debuted by Kalshi in April and integrated into Polymarket’s international order books a month later.
Federal investigations and state litigation over operations
The arrival of the veteran Wall Street banker coincides with a sharp escalation in regulatory scrutiny surrounding event contract venues. The U.S. House Committee on Oversight and Accountability and the CFTC have intensified inquiries following allegations of potential insider trading.
Regulatory filings confirm that the CFTC currently has three open inquiries into orders executed on Polymarket this year. The probes cover contracts tied to presidential pardons under Joseph Biden, geopolitical prediction markets concerning Iran, and corporate event contracts involving Google traded in July.
Polymarket founder and CEO Shayne Coplan stated that the platform faces no direct allegations of misconduct and maintains robust internal surveillance protocols developed by a former FBI official. The platform has also referred dozens of suspicious accounts to the Department of Justice for further review.
However, research published by the Anti-Corruption Data Collective identified 152 accounts linked to armed conflict markets that accumulated $8 million in trading profits, displaying an abnormal 97% win rate. Furthermore, according to the Project On Government Oversight (POGO), a U.S. service member already faces formal charges for allegedly leveraging classified intelligence to secure over $400,000 in profits on the platform.
Legal battles have also spilled over into state jurisdictions. New York Attorney General Letitia James and Governor Kathy Hochul filed suit against Polymarket for allegedly operating unlicensed gambling operations.
Polymarket filed a federal countersuit, arguing that exclusive regulatory jurisdiction over event contracts belongs to the CFTC under federal law. Concurrently, the New York State Senate is reviewing the ORACLE bill, a legislative proposal designed to ban users under 21 and restrict specific event-based trading categories.
On Capitol Hill, civil society organizations formally petitioned the Senate Armed Services Committee to amend Section 1801 of the National Defense Authorization Act (NDAA) for Fiscal Year 2027 to prohibit Department of Defense personnel from trading on prediction market platforms.
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