Jane Street, a prominent Wall Street trading firm, disclosed passive investments in key Bitcoin mining companies through SEC filings on October 24, 2025. The firm revealed stakes of approximately 5% in Cipher Mining, Bitfarms, and Hut 8, with Cipher Mining's holding detailed as 5% of total stock, or about 19.68 million shares, split among Jane Street entities like Jane Street Capital (0.2%), Jane Street Options (2.1%), and Jane Street Global Trading (2.7%).
Following the disclosure, mining stocks experienced significant rallies. Cipher Mining (CIFR) surged 19.73%, Bitfarms (BITF) rose 10.68%, and Hut 8 Mining (HUT) increased by 17.27% by Friday's close. Other firms, including American Bitcoin Corp. and IREN Limited, also saw gains exceeding 11%. This uptick was partly attributed to Google's earlier acquisition of a 5.4% stake in Cipher Mining in late September, amplifying investor confidence.
The investments coincide with miners' efforts to enhance efficiency through advanced data centers, more powerful mining machines, and cheaper electricity contracts. Over the past year, Bitfarms grew by 131%, Hut 8 by 211%, and Bitcoin itself appreciated around 73%. Regulatory support also played a role, with U.S. Secretary of Energy Chris Wright proposing rules to expedite grid connections for high-energy facilities like crypto mining and AI data centers, enabling reviews within 60 days if upgrade costs are covered.
Eric Jackson, Founder of EMJ Capital, emphasized, "Cipher Mining is the best-positioned miner for institutional capital given its AI-compute pivot." This institutional interest mirrors past market catalysts, such as BlackRock's ETF moves, signaling broader acceptance of Bitcoin's infrastructure.
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