Kalshi ends Donald Trump Jr.'s adviser deal over Polymarket stake
Kalshi has cut ties with Donald Trump Jr. as a strategic adviser, after 1789 Capital invested in rival prediction market Polymarket.
SUMO· the number puzzle
Dialo· learn languages by speaking
ediviewer· read EDI files like documents
giftdetect· the right gift in minutesKalshi has ended its advisory contract with Donald Trump Jr., and the reason is a rival. 1789 Capital, the investment firm tied to Trump Jr., put money into Polymarket, another prediction market.
Trump Jr. joined Kalshi as a strategic adviser in January 2025. His job was to help the platform grow its customer base and strengthen its presence in a crowded market. That arrangement is now over.
What is Kalshi?
Kalshi is a prediction market, a platform where people trade on the outcome of real-world events, such as elections or economic data. Polymarket does something similar, which makes the two direct competitors.
Why did Kalshi end the contract?
According to the report, the split comes down to 1789 Capital's investment in Polymarket. Having an adviser whose firm backs your main competitor is an awkward position, and Kalshi has chosen to end it rather than live with it. The available material does not give financial terms or say how much 1789 Capital invested.
Prediction markets have been pulling in more attention and more famous backers lately, so a high-profile adviser moving to the other side of the rivalry is a notable change for Kalshi. For users, nothing changes on the platform itself. This is a business relationship ending, not a product change.
Apps worth a look
SUMO: the number puzzleTap the right tiles, add them up, hit the target. Easy to learn, hard to master. Free, for all ages.
Dialo: learn languages by speakingTalk to an AI conversation partner; every sentence comes back corrected and explained in your language. 9 languages, A1 to C2.
ediviewer: read EDI files like documentsOpen EDIFACT and X12 messages, see every segment explained, convert to JSON/XML, export PDF and Excel. Runs locally, no upload.
giftdetect: the right gift in minutesPick who it is for, the occasion and their personality. The search engine reads product descriptions from local shops and ranks what fits. Free, no sign-up.
More from this day
See all →
Louisiana sues Kalshi, Robinhood and other prediction markets
DOJ moves to seize $1.2 billion stolen from Binance by North Korea
Who is Colette Kress, NVIDIA's interim CEO after Jensen Huang?
