"Shares of crypto miners rallied on Friday, with Bitfarms, Cipher Mining and Hut 8 extending gains after trading company Jane Street disclosed sizable positions in all three Bitcoin mining companies. Filings submitted to the US Securities and Exchange Commission on Thursday show that Jane Street's trading affiliates own roughly 5.4% of Bitfarms, 5% of Cipher Mining and 5% of Hut 8, representing passive trading positions rather than activist holdings."
"At market close on Friday, Bitfarms (BITF) was up 10.68%, Cipher Mining (CIFR) 19.73% and Hut 8 (HUT) around 17.27%, according to data from Yahoo Finance. Other Bitcoin mining stocks also posted gains on Friday, including American Bitcoin Corp., (+11.29%), IREN Limited (+12.60%) and Hive Digital Technologies (+17.77%). Jane Street, a leading proprietary trading and market-making firm active in equities and digital assets, first disclosed exposure to Bitcoin miners in 2023 through its investment in Marathon Digital (MARA) holdings."
"Bitcoin mining, the process of using specialized computers to solve complex mathematical problems to verify transactions and introduce new Bitcoin into circulation, is pivotal to keeping the network operational and secure. While solo Bitcoin miners occasionally get lucky and mine a block, the industry has become increasingly dominated by Bitcoin mining companies, most of whom have seen significant growth in 2025. Over the past year, many Bitcoin mining companies have outpaced Bitcoin itself."
Jane Street's trading affiliates disclosed passive stakes of roughly 5.4% in Bitfarms and about 5% each in Cipher Mining and Hut 8. Those disclosures coincided with rallies in the miners' shares, with Bitfarms up about 10.68%, Cipher Mining about 19.73% and Hut 8 around 17.27% at Friday close, and earlier 8%–13% jumps on Thursday. Other mining stocks including American Bitcoin Corp., IREN Limited and Hive Digital Technologies also posted double-digit gains. Jane Street previously showed exposure to miners via Marathon Digital in 2023. Bitcoin mining remains central to network security, and many mining companies have outpaced Bitcoin in 2025.
Read at cointelegraph.com
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