Jane Street’s Trading Haul Juiced by Surging Bet on Anthropic

Jane Street Group’s record haul this year has been boosted by savvy bets on the artificial intelligence boom that are showing up as big gains in its trading results, according to people familiar with the matter.

The market-making firm told investors that its investments in private companies and funds lifted its third-quarter trading revenue by about $830 million, said one of the people, who asked not to be identified citing private details. Anthropic PBC, which has seen its valuation surge this year, was responsible for a vast majority of those gains, the people said.

Those gains represented about 12% ...