Crypto miner stocks rebounded on Friday, with Bitfarms, Cipher Mining and Hut 8 extending gains after trading firm Jane Street disclosed large positions in all three Bitcoin mining companies.
Documents filed Thursday with the U.S. Securities and Exchange Commission show that Jane Street’s trading subsidiaries own approximately 5.4% of Bitfarms, 5% of Cipher Mining and 5% of Hut 8, representing passive trading positions rather than activist stakes.
Following this news, stocks rebounded 8% to 13% on Thursday and continued to advance on Friday.
As of Friday’s market close, Bitfarms (BITF) was up 10.68%, Cipher Mining (CIFR) was up 19.73% and Hut 8 (HUT) was up about 17.27%, according to data from Yahoo Finance.
Other Bitcoin mining stocks also saw 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 stocks and digital assets, has disclosed its exposure to Bitcoin miners in 2023 for the first time through its investment in Marathon Digital (MARA) holdings.
Jane Street’s disclosure comes after Google announced it acquired a 5.4% stake in Cipher Mining on September 25.
Related: US Energy Secretary Proposes Faster Direct Network Access for AI and Crypto Miners
Bitcoin Mining Companies Outpace Bitcoin in 2025
Bitcoin mining, the process of using specialized computers to solve complex mathematical problems to verify transactions and introduce new Bitcoins into circulation, is essential to keeping the network operational and secure.
While solo Bitcoin miners sometimes get lucky and mine a block, the industry is increasingly dominated by Bitcoin mining companies, most of which have seen significant growth in 2025.
Over the past year, many Bitcoin mining companies have overtaken Bitcoin itself.
According to data from Yahoo Finance, Bitfarms is up almost 131% and Hut 8 is up around 211% over the past 12 months. At the time of writing, Bitcoin is up approximately 73% over a one-year period.
Review: 7 reasons why Bitcoin mining is a terrible business idea
