Cipher Mining rises after Jane Street reveals stake

** Shares of bitcoin mining and data center infrastructure firm Cipher Mining CIFR jump 6.6% to $18.40 premarket

** Trading firm Jane Street disclosed a 5% stake in CIFR late on Thursday

** Jane Street is now CIFR's third-largest shareholder after V3 Holding and Vanguard Group

** 12 of 14 brokerages rate CIFR "buy" or higher and two "hold"; median PT $16.50 - data compiled by LSEG

** As of last close, CIFR shares have surged more than threefold YTD