Donald Trump Jr has ended his paid advisory role at US prediction-market company Kalshi after investment firm 1789 Capital, where he is a partner, increased its backing of rival Polymarket. Kalshi says the decision was mutual and driven by a commercial conflict, although Reuters has also reported disputed concerns about possible political scrutiny.
The departure was reported by Reuters on Thursday, 12 November 2026, and independently covered by the Associated Press. It brings an end to a relationship that began in January 2025, but does not necessarily mean Trump Jr no longer holds a financial interest in Kalshi.
Why did Donald Trump Jr leave Kalshi?
Kalshi said 1789 Capital’s larger investment in Polymarket, one of its principal competitors, had made the advisory arrangement untenable. The company said discussions began in August 2026, when 1789 was leading a fresh Polymarket fundraising round, and that it contacted Trump Jr in the autumn to discuss the conflict.
Spokesperson Dani Lever described the departure as a mutual agreement and thanked Trump Jr for helping the company reach more customers. Kalshi did not allege that he had misused confidential information or breached any law.
An adviser to one company may have access to commercially sensitive plans, while holding an advisory role and financial exposure connected with a direct rival. That creates an understandable conflict-management issue even when there is no evidence of misconduct.
Timeline: from Kalshi adviser to Polymarket investor
- 13 January 2025: Kalshi announces Trump Jr as a strategic adviser, saying he will help broaden awareness of its prediction markets.
- 26 August 2025: Polymarket announces a strategic investment by 1789 Capital and separately appoints Trump Jr to its advisory board. The initial terms are undisclosed.
- 31 August to 1 September 2026: Reports say 1789 is leading a proposed $1 billion Polymarket funding round, with around $300 million expected from the firm.
- August to autumn 2026: According to Kalshi, conversations over the enlarged rival investment begin and lead to discussions with Trump Jr.
- 12 November 2026: Kalshi confirms the advisory contract has ended.
How much money is involved?
The Financial Times previously reported that Trump Jr received a Kalshi equity grant initially worth about $300,000. The value when awarded is not the value of any stake today, and the company has not established publicly whether the shares were retained or disposed of after the advisory contract ended.
In September 2026, 1789 Capital spokesperson Alexa Henning told the New York Times that the firm expected to contribute around $300 million to a planned $1 billion Polymarket funding round. She said the firm had previously invested approximately $200 million. Reports put the proposed post-investment valuation at $21 billion. These are reported fundraising arrangements, not proof that every proposed investment had already been completed.
Trump Jr’s personal compensation, his partnership interest in 1789 Capital and the firm’s stake in Polymarket are distinct interests. It would be misleading to describe the firm’s entire investment as Trump Jr’s personal money.
Did US politics influence Kalshi’s decision?
That question remains contested. Two people familiar with the matter told Reuters there had been internal concerns that keeping the president’s son as an adviser might expose Kalshi to congressional examination after Democrats won both chambers in the November midterm elections.
Kalshi rejects that explanation. Its spokesperson told Reuters that political considerations were not discussed or taken into account. Reuters’ sources and Kalshi’s denial must therefore be read as conflicting accounts, not as proof of an undisclosed political motive.
At the time of the report, Trump Jr had not immediately replied to Reuters’ request for comment. A representative of 1789 Capital declined to comment and a Polymarket spokesperson also declined.
What are Kalshi and Polymarket?
Both are prediction-market businesses. They allow customers to trade contracts linked to the outcome of future events, including elections, economic releases, sporting results and other questions.
A contract that pays $1 if a given event happens, and nothing if it does not, may trade at 60 cents. That price is often presented as roughly 60% market-implied probability, but it is not the same as a rigorously measured forecast: prices also respond to trading demand, liquidity and other factors.
Both Kalshi and Polymarket US have federally designated contract-market operations overseen by the Commodity Futures Trading Commission (CFTC). The companies also face disputes over how certain products, especially sports-related contracts, should be treated under federal derivatives law and state gambling rules. Kalshi has held a CFTC designation since 2020.
Why is Congress examining prediction markets?
Political interest extends well beyond this particular contract. On 10 November, senators Elizabeth Warren and Jeff Merkley asked the White House for details about ethics safeguards, referring to a separate former aide’s prediction-market trading case and possible conflicts associated with the president’s family. They requested answers by 23 November 2026.
The letter raises questions about oversight and the use of non-public government information. It does not establish that Trump Jr traded improperly or that either company obtained an unlawful regulatory advantage. Both companies have denied that their Trump family connections dictated regulatory treatment.
What remains unanswered?
- Whether Trump Jr retains some or all of the Kalshi shares awarded during his advisory role.
- Exactly what confidentiality or conflict safeguards applied while he had ties to both competitors.
- Whether the larger Polymarket round closed on precisely the reported terms.
- Whether congressional enquiries produce new documented evidence about the companies’ relationships or regulatory decisions.
For now, the clearest finding is a confirmed commercial split accompanied by disputed claims about political concerns. There is no substantiated evidence in the reporting reviewed that Trump Jr, Kalshi or Polymarket committed wrongdoing in connection with the advisory departure.
Follow this developing subject through Kalshi, Polymarket and Trump Jr coverage.
Sources
- Reuters, 12 November 2026: Kalshi ends Trump Jr advisory contract
- Associated Press: Trump Jr exits Kalshi advisory role
- Kalshi: Trump Jr strategic adviser appointment, January 2025
- Polymarket announcement, August 2025
- New York Times via Philadelphia Inquirer: 1789 Capital funding details
- US Senate: Warren and Merkley prediction-market ethics questions
- CFTC register of designated contract markets
