Citadel Discloses 5.5% Stake in Core Scientific, Adding to Recent Bitcoin Mining, AI Positions

Market-making giant Citadel Securities Group has accumulated a 5.5% passive stake in Core Scientific (NASDAQ: CORZ), marking the second major bitcoin miner and HPC data center position the firm has reported this week.

Core Scientific’s filing on Wednesday shows Citadel Securities and affiliated principal-strategies vehicles collectively own 17.2 million Core Scientific shares. The position is held predominantly across Citadel Securities’ trading and market-making entities rather than through Citadel Advisors, the hedge-fund arm, indicating the exposure stems from proprietary trading and liquidity-provision activities that crossed the SEC’s 5% reporting threshold.

The disclosure follows a separate filing made Monday in which Citadel reported a 5.4% passive stake in TeraWulf. That earlier position came shortly after TeraWulf unveiled a colocation and high-performance computing partnership with Fluidstack, reflecting miners’ broader shift toward AI-oriented compute infrastructure as bitcoin hashprice falls to historical lows.

The two disclosures highlight growing involvement by large multi-strategy trading firms in bitcoin-mining equities, particularly as liquidity in the sector improves and miners diversify into energy-dense workloads beyond bitcoin production. Core Scientific was one of the first large North American bitcoin mining firms to announce multi-year HPC colocation leases to diversify beyond bitcoin mining.