** Shares of Workday WDAY.O jump 12.4% to $137 premarket

** Co posts Q1 rev of $2.54 billion, compared with analysts' average estimate of $2.52 billion, according to data compiled by LSEG

** Subscription revenue, a key metric for WDAY, jumped 14.3% to $2.35 billion, with net new business driving 40% of that growth, according to Chief Commercial Officer Rob Enslin

** Q1 adjusted per-share profit came in at $2.66, well above analysts' estimate of $2.51

** Average rating of 42 analysts is "buy"; their median PT is $168.67 - LSEG-compiled data

** YTD, stock down 43.3%