Kalshi Ends Donald Trump Jr. Advisory Role Following Polymarket Investment

The prediction market operator Kalshi has officially ended its advisory relationship with Donald Trump Jr. following his venture capital firm’s increased investment in the rival platform Polymarket. The move marks a significant shift for the company, which had brought the former president's son on board as a strategic adviser earlier this year.

Kalshi Donald Trump Jr. advisory split

According to reports, the decision was described as mutual by a Kalshi spokesperson. The discussions regarding the termination of the role began in August, shortly after 1789 Capital, the firm led by Trump Jr., took a leading position in a $1 billion funding round for Polymarket. This investment round is expected to value the competitor at $21 billion, with 1789 Capital contributing approximately $300 million to the deal.

Kalshi ended its partnership with Donald Trump Jr. after his firm invested in a competing prediction market.

Donald Trump Jr. had initially joined Kalshi as a strategic adviser in January 2025. At that time, he received an equity stake in the platform that was reportedly valued at $300,000. Despite the high-profile nature of the partnership, the company has clarified that the decision to part ways was strictly business-related. A spokesperson for Kalshi explicitly denied that political considerations played any role in the termination of the advisory agreement.

However, the situation has drawn internal scrutiny. Two individuals familiar with the matter indicated that some members within the Kalshi organization had raised concerns regarding the potential impact of the political landscape on the company’s operations, specifically referencing the results of the midterm elections and the shift in congressional control. While these internal discussions occurred, the official stance from the company remains that the investment in a direct competitor was the primary driver for ending the contract.

Why it matters

The departure of a high-profile adviser underscores the competitive pressures within the emerging prediction market industry. As platforms like Kalshi and Polymarket secure massive funding rounds, the movement of capital and strategic personnel highlights the intense rivalry for market dominance.

For stakeholders and users, this development signals a tightening of operational focus among prediction market operators. The decision to sever ties due to conflicting financial interests demonstrates how venture capital involvement in competing firms can influence corporate governance and strategic partnerships.