Jane Street Capital disclosed passive investments in three Bitcoin mining companies through SEC 13G filings, including approximately 19.68 million shares representing 5% of Cipher Mining. Mining stocks surged following the disclosure, with Cipher Mining advancing nearly 20%, Bitfarms rising 10.68%, and Hut 8 gaining 17.27%. The investments signal growing institutional interest in the sector following Google's 5.4% stake acquisition in Cipher Mining in late September.