Donald Trump Jr.’s Firm Pours Another $300M Into Polymarket

Donald Trump Jr.’s venture capital firm 1789 Capital is reportedly a key player in a $1 billion financing round for Polymarket and will contribute $300 million to the cause.

The investment firm has held a stake in the prediction market operator for a year and is said to be a vital part of a new financing round effort that takes the valuation on Shayne Coplan’s company to approximately $21 billion, up from the $15 billion Polymarket was valued at just four months ago.

It’s rumored that although 1789 Capital’s initial stake in Polymarket was relatively small, it’s multiplied in value many times over following the $15 billion valuation — something that’s occurred with another one of the firm’s investments in the prediction market industry.

The president’s eldest son is also an advisor to Polymarket and another well-known company in the event contracts space.

Busy Year of Capital-Raising for Polymarket

Already one of the largest non-technology unicorns, Polymarket is raising capital at a brisk pace in 2026 as it looks to keep pace with competitors and bring more professional traders to its platform.

The April funding round of $1 billion included another $600 million from New York Stock Exchange owner Intercontinental Exchange (NYSE: ICE) as well as an additional $400 million from a group of investors led by hedge fund D.E. Shaw, confirming appetite for prediction market stakes remains robust among professional investors.

Polymarket’s latest capital-raising drive arrives just months after the company finally launched anew its U.S. prediction market and amid efforts to shed the prediction market image of being a new-fangled alternative to sports betting.

Polymarket’s courtship of the more sophisticated institutional investment community has included launching a fresh spin on private markets and graphic processing units (GPUs) compute trades as well as a request to regulators to allow margin trading on the platform.

Interesting Timing for Trump Jr. Investment

Assuming reports are accurate that 1789 Capital is in fact preparing to allocate $300 million to Polymarket, the timing of that increased stake is likely to raise eyebrows in some circles.

It arrives just days after the New York Times ran an article, citing a quartet of unidentified sources, indicating that the president’s son pushed Republican attorneys general in a bid to keep them out of the various state-level legal fights against prediction markets.

He reportedly made those remarks at the Republican Attorneys General Association (RAGA) conference in New Orleans, but the association told CNBC the sources cited by the New York Times took the Trump Jr. comments out of context because all he did was briefly speak about the regulatory landscape facing prediction markets.