Donald Trump Jr.’s venture firm 1789 Capital is putting roughly $300 million into a $1 billion financing that values the prediction market Polymarket at $21 billion, a 40 percent step-up from the $15 billion price tag assigned just months ago. The firm already held about $200 million of equity, so the new money brings its total commitment to roughly half a billion dollars for a stake that now sits inside a unicorn the administration has openly championed.
The round and the numbers
The $1 billion raise is structured as a single primary tranche led by 1789 Capital, according to a spokesperson for the firm. No other investors were named, and the source did not disclose whether the round includes any secondary component, break fees, or special governance rights. The valuation jump from $15 billion to $21 billion implies a post-money increase of $6 billion on $1 billion of new capital, meaning the incoming dollars are buying roughly 4.8 percent of the company, a price that assumes the previous investors’ stakes are marked up without fresh cash from them.
The Trump family position
Trump Jr. holds advisory roles at both Polymarket and its rival Kalshi, the latter since 2025 with shares valued at more than $300,000 at the time of grant. 1789 Capital’s cumulative $500 million exposure to Polymarket now dwarfs that personal stake. The firm’s spokesperson, Alexa Henning, confirmed the $300 million commitment and the prior $200 million investment but did not address whether 1789 Capital holds board seats, information rights, or any contractual preference over other shareholders.
The regulatory backdrop
The financing arrives while the Commodity Futures Trading Commission, led by Trump appointee Michael Selig, has sued states attempting to impose their own rules on prediction markets and publicly praised the operators. In May, the president posted on Truth Social that the sector would thrive under his leadership. Polymarket and Kalshi have both grown sharply over the past year, offering contracts on outcomes ranging from political speeches to reality-television plotlines.
What to watch
The round concentrates ownership and political alignment in a single vehicle. Whether other investors follow at the new valuation, and whether the CFTC’s current posture survives legal challenges from states, will determine if the $21 billion mark holds or proves to be a momentary high-water mark tied to regulatory forbearance.