CoinDesk
Donald Trump Jr. has left Kalshi after the prediction-market company learned that 1789 Capital, his venture firm, invested in rival Polymarket. Kalshi said the decision to end his advisory role was mutual, with discussions beginning in August after 1789 led Polymarket's most recent funding round. Trump Jr. joined Kalshi in January 2025 and received an equity stake reportedly worth about $300,000 at the time.
Why it matters
Trump Jr.'s advisory work focused on helping Kalshi expand its customer base, attract users and build partnerships. His departure creates a visible conflict-of-interest case because 1789 backed a direct competitor. Kalshi and Polymarket both offer contracts linked to politics, sports, economic developments and other real-world outcomes, competing for users, trading volume, liquidity and market share.
Kalshi said: "We have mutually agreed to end Don's advisory role after his firm's significant investment in a competitor this past summer." The episode also lands amid growing congressional scrutiny of prediction markets and the CFTC's defense of their sports-related products. Sen. Catherine Cortez Masto highlighted the Trump family's investment exposure, while Rep. Ro Khanna called for a ban on those products.
Market impact
The disclosed change affects an advisory relationship rather than either platform's contracts, liquidity or trading operations. Its broader impact is reputational, giving lawmakers and regulators a concrete example of why investments in one prediction market by people associated with another can raise governance concerns.
For investors, the focus is whether conflicts involving prominent advisers and capital allocators lead to stricter oversight of market integrity, political neutrality and sports-related contracts. Kalshi's handling of the matter shows that even mutually agreed separations can keep regulatory scrutiny alive as prediction markets seek wider adoption.
Frequently asked questions
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Why did Kalshi end Donald Trump Jr.’s advisory role?
Kalshi said the decision was mutual after 1789 Capital invested in rival Polymarket. The firms began discussions in August, following 1789’s participation in Polymarket’s latest funding round.
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How much was Donald Trump Jr.’s Kalshi equity stake worth?
Trump Jr.’s Kalshi equity stake was reportedly worth approximately $300,000 when he was appointed as a strategic adviser in January 2025.
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How do Kalshi and Polymarket compete with each other?
Both platforms let users trade contracts tied to real-world outcomes, including politics, sports and economic developments. They compete for users, liquidity, trading volume and market share.
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Why did Donald Trump Jr.’s departure attract political scrutiny?
His 1789 Capital backing of Polymarket raised conflict-of-interest concerns while Kalshi advised him. The episode also coincided with congressional scrutiny of prediction markets and the CFTC’s support for sports-related contracts.
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Did Kalshi change its products or trading operations?
No product, liquidity or operating change was disclosed. The reported action concerned Trump Jr.’s advisory relationship and primarily carries reputational and governance implications.
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