Trump Jr. Now Profits From Both Sides of the US Kalshi, Polymarket Rivalry
Donald Trump Jr. is deepening his ties to Polymarket through a new $300 million investment from 1789 Capital, his venture firm. He also holds a paid advisory role, and equity, at rival Kalshi, giving him a stake in whichever platform wins.
1789 Capital is contributing $300 million to Polymarket's $1 billion round, valuing the platform at $21 billion. Trump Jr. separately holds a Kalshi stake, granted in 2025 and worth $300,000 at the time, before Kalshi's valuation climbed to $22 billion.
Advisor to Both Sides
Trump Jr. became a paid strategic advisor to Kalshi in January 2025. He joined Polymarket's advisory board seven months later, alongside 1789 Capital's initial investment in the platform.



