The Wall Street Journal reported that 1789 Capital, where Donald Trump Jr. is a partner, plans to invest about $300 million more in prediction market platform Polymarket. The investment is part of a roughly $1 billion funding round led by 1789 Capital that would value Polymarket at about $21 billion. The firm had previously invested around $200 million in Polymarket and would become one of its largest backers after the new investment. Intercontinental Exchange remains Polymarket’s largest investor, having disclosed in July that its $1.6 billion stake represented about 22% of the company’s outstanding shares.