Donald Trump Jr., already an advisor to Kalshi, joins Polymarket’s advisory board

Tuesday, August 26, 2025 2:59 PM
Photo:  Donald Trump, Jr. flickr photo by Gage Skidmore shared under a Creative Commons (BY-SA) license
  • Daniel O'Boyle, InGame

Donald Trump Jr. is joining Polymarket’s advisory board, meaning he now has a role in each of the two largest prediction markets by global volume.

In a press release issued Tuesday morning, Polymarket said it had secured investment from 1789 Capital, where the president’s son is a partner. The release did not disclose terms of the deal.

As part of the investment, Trump Jr. will join the company’s advisory board. It is not clear what his role on the advisory board will entail.

Trump Jr. is already a “strategic advisor” to prediction market Kalshi, but not an investor. Joining Polymarket too, he will have ties to two businesses that appear to be developing as chief rivals in the battle for prediction market customers in the U.S.