Donald Trump Jr. has built a win-win financial structure in the prediction markets sector. His venture fund, 1789 Capital, invested $300 million in Polymarket, while he holds a paid advisory position and a stake in the competing platform Kalshi. In essence, the U.S. president's son is hedged against any outcome in the battle between these two giants.
During the latest Polymarket funding round, which valued the platform at $21 billion, 1789 Capital acted as a key investor. Meanwhile, Trump Jr. acquired his stake in Kalshi back in early 2025, when the company was valued at a modest $300,000. Since then, Kalshi's market capitalization has soared to $22 billion, making this one of the most successful investments in his portfolio.
An Advisor with a Foot in Both Camps
In January 2025, Trump Jr. officially took up the post of paid strategic advisor at Kalshi. Seven months later, he joined the advisory board of Polymarket—it was then that 1789 Capital first invested in the project. Thus, he simultaneously advises two direct competitors that are vying for the same users and identical regulatory frameworks.
Such a dual role inevitably raises questions about ethics and conflicts of interest. At Kalshi, they respond that Trump Jr. focuses exclusively on marketing strategy and does not participate in discussions of regulatory matters. However, as practice shows, the line between marketing and lobbying in this industry is extremely thin.
The Regulatory Battlefield
Against this backdrop, a large-scale legal war is unfolding. The Commodity Futures Trading Commission (CFTC) has filed lawsuits against nine states, attempting to block their efforts to regulate event betting markets at the local level. Eight of these states are led by Democratic attorneys general. The situation has become particularly tense in Arizona, where a criminal case was opened against Kalshi for illegal gambling services.
Trump Jr. himself, according to available data, has personally urged Republican attorneys general to stop pressuring the platforms. In March, at a closed meeting in New Orleans, he claimed that the campaign against such platforms was initiated by traditional gambling companies to protect their own business.
The U.S. president has also publicly supported the industry, calling betting markets a new financial product and advocating for maintaining CFTC oversight. Thus, his son's interests in the leading platforms have become an integral part of the dispute over regulating the entire market.
My take: This situation is a vivid example of how political capital is converted into financial dividends. Trump Jr. is not just an investor; he is a bridge between two competing businesses and regulators. As long as prediction markets continue to grow, his position remains winning under any scenario. The only question is how long regulators will turn a blind eye to such an obvious conflict of interest, which in any other industry would long ago have become the subject of intense scrutiny.