** Shares of AI software maker C3.ai AI.N fall 10.7% to $14.90 in premarket trading
** Co withdraws its FY26 forecast, while Q1 revenue of $70.3 mln misses estimates of $94.6 mln, according data compiled by LSEG
** Co appoints Stephen Ehikian as chief executive officer, while former CEO Thomas Siebel to continue as executive chairman
** Siebel says the Q1 performance was "completely unacceptable" and attributes the performance to two factors the reorganisation of sales and services leadership and his unanticipated health issues
** D.A. Davidson says, "co faces execution risks surrounding the transition of its business from a subscription based pricing model to a consumption based model"
** 3 of 16 brokerages rate the stock "buy" or higher, 7 "hold" and 6 "sell" or lower; their median PT is $23 - data compiled by LSEG
** Up to last close, stock down 51.6% YTD
(Reporting by Avinash P in Bengaluru)
((Avinash.P@thomsonreuters.com;))