Kalshi Ends Trump Jr. Role Over Polymarket Tie

Kalshi has ended Donald Trump Jr.’s advisory role, describing the split as mutual and linking it to his venture firm 1789 Capital’s major investment in rival Polymarket. 1789 Capital reportedly led a $1 billion Polymarket funding round at a $21 billion valuation, contributing about $300 million; Trump Jr. joined Polymarket’s advisory board in August 2025 and remains associated with the company. Trump Jr. became a Kalshi strategic adviser in January 2025 and received an equity stake then reported to be worth about $300,000, though it is unclear whether he retains it. The departure comes amid scrutiny of prediction markets and the Trump family’s financial ties: Democratic senators Elizabeth Warren and Jeff Merkley have sought White House answers about Trump Jr.’s interests and raised concerns including insider trading. Kalshi has reportedly discussed fundraising at a valuation near $40 billion.