Donald Trump Jr. agreed to end his advisory role with the prediction market Kalshi shortly after Trump Jr.'s venture capital firm made a large investment in its competitor, Polymarket.
“We have mutually agreed to end Don's advisory role after his firm's significant investment in a competitor this past summer. We are grateful for his contributions in helping us market Kalshi to more customers," Kalshi said in a statement provided to Ars and other news outlets this week.
Trump Jr. may still have a financial interest in Kalshi, which has benefited from the Trump administration's legal and regulatory support for prediction markets. Trump Jr. "was handed about $300,000 worth of equity in Kalshi after joining the prediction market platform as a strategic adviser in early 2025," the Financial Times reported in June.
