Key Insights:
- Capital is following regulatory access. Polymarket has invested heavily in building a regulated US operation.
- Competition is accelerating. Kalshi recently raised funds at a $22 billion valuation and reportedly seeks a much higher figure.
- Sports could reshape the market. Prediction contracts now extend well beyond elections and political events.
1789 Capital plans to invest about $300 million in Polymarket as part of a $1 billion funding round. The deal would value the prediction market at $21 billion and strengthen its push into the US financial market.
The Wall Street Journal reported the financing plans on Aug. 31, citing people familiar with the matter. Alexa Henning, a spokesperson for 1789 Capital, separately confirmed the planned investment and valuation.
The transaction has not closed, and the final investment terms could still change. Investors have not disclosed the complete ownership structure or the identities of the other participants.
NEW with @DanaMattioli @ceostroff: Donald Trump Jr's venture-capital fund is investing around $300M into Polymarket, making it one of the largest investors into the company.
(The firm, 1789, has already invested around $200M into Polymarket.) pic.twitter.com/Tdu1VtDxdq
— Neil Mehta (@neilmhta) August 31, 2026
A rapid rise in private-market value
The proposed round would mark another sharp increase in Polymarket’s valuation. The company reached roughly $15 billion in April after securing investment from D.E. Shaw and G Squared.
The latest financing would therefore raise its valuation by about 40% within months. It would also place Polymarket among the most valuable private companies in the prediction-market sector. 1789 Capital already invested roughly $200 million in Polymarket. If the new investment closes as planned, its total exposure would reach approximately $500 million.
The firm would consequently become one of Polymarket’s largest backers. However, the final ownership percentage depends on the round’s structure and the terms negotiated with investors. Polymarket has not disclosed whether the financing will involve new shares, secondary sales, or both.
Trump-linked investment interests expand
Donald Trump Jr. joined 1789 Capital as a partner after the 2024 presidential election. He later became an adviser to Polymarket after the firm invested in the platform.
He also advises Kalshi, Polymarket’s main prediction-market competitor. That connection gives Trump Jr. financial relationships with two companies competing for a larger share of the market. Trump Jr. has said his investments come from his private activities. He has also said he holds no policy position and has no administration role.
Meanwhile, President Donald Trump has publicly supported prediction markets. His administration also appointed Michael Selig to lead the Commodity Futures Trading Commission.
Selig has praised prediction markets while the CFTC has challenged state efforts to regulate certain contracts. Those developments have intensified scrutiny around the industry and its political connections.
House Judiciary Committee Democrats are investigating 1789 Capital’s rapid expansion and investments involving companies affected by government policy. The inquiry does not establish wrongdoing by Trump Jr., 1789 Capital, or Polymarket.
Regulation remains the biggest uncertainty
Polymarket’s expansion comes after years of regulatory restrictions in the United States. The company agreed to a $1.4 million CFTC penalty in 2022 and stopped offering certain markets to US users.
It later acquired QCEX and established Polymarket US as a federally regulated business. The CFTC lists QCX LLC, operating as Polymarket US, as a designated contract market.
That kind of status will give Polymarket a leg-up in the United States. State officials are still battling sports event contract bids, however. Some regulators argue that certain contracts resemble sports betting. Polymarket and other operators argue that federally regulated event contracts fall under derivatives law.
Courts have produced differing outcomes in disputes involving state regulators and prediction-market companies. Therefore, the legal landscape remains fragmented.
The new capital could help Polymarket fund compliance, technology, market surveillance, and legal challenges. It could also support efforts to attract institutional traders and introduce additional financial products.
ICE stake raises the competitive stakes
Intercontinental Exchange remains Polymarket’s largest investor after building a substantial position. The New York Stock Exchange owner invested as the prediction-market company expanded its financial infrastructure.
ICE initially agreed to invest up to $2 billion in October 2025. That transaction valued Polymarket at about $8 billion before the investment. The company later completed a further $600 million cash investment in March 2026. An SEC filing showed ICE recorded a $389 million fair-value gain during the first quarter.
That gain reflected the increased value of its Polymarket shares rather than cash income from the platform. Polymarket now faces a rapidly changing competitive landscape. Kalshi has secured a $22 billion valuation, while reports suggest it could pursue a valuation near $40 billion.
The latest financing therefore signals more than another private-market milestone. 1789 Capital is placing substantial capital behind a company seeking to redefine event-based trading in the United States.
Conclusion
1789 Capital’s planned $300 million investment would give Polymarket fresh capital and a $21 billion valuation. The company still faces regulatory disputes, competitive pressure, and questions over how prediction markets fit within traditional financial markets.
The financing remains uncompleted, so its final terms could change. The deal, however, is a sign of growing investor confidence in prediction markets, and their growing importance in financial trading.
