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Exclusive-Kalshi ends Donald Trump Jr’s advisory contract due to Polymarket conflict

By Thomson Reuters Nov 12, 2026 | 12:18 PM

By Anirban Sen

NEW YORK, Nov 12 (Reuters) – Prediction markets startup Kalshi ​has ended its ‌advisory contract with Donald Trump Jr, after his venture capital firm 1789 ‌Capital ​increased ⁠its stake in ⁠arch-rival Polymarket, according to a Kalshi spokesperson.

“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,” the ⁠spokesperson said, adding that the decision was mutual and ⁠the ‌conversations to ⁠end the contract ​started ‌in August since ​1789 led ⁠Polymarket’s most recent funding round.

(Reporting by Anirban Sen in New York, Editing by Megan ​Davies)