SentinelOne slips on downbeat Q4 revenue outlook, CFO departure

** SentinelOne S slips 8.1% to $15.60 premarket

** Cybersecurity firm forecasts Q4 revenue at $271 mln, below analysts' estimate of $273.1 mln, per data compiled by LSEG

** Says current CFO Barbara Larson will leave her role in mid January; Barry Padgett will serve as interim CFO

** However, Q3 revenue narrowly beats estimates

** At least four brokerages cut PT following Q3 results

** J.P.Morgan says lack of upside in outlook, CFO departure within a year of joining added to investors' concerns; trims PT to $17 from $19

** D.A. Davidson says while shares remain cheap, re-rating higher unlikely until investors convinced that stable growth is likely

** Stock rated "buy" on avg; median PT at $23, per data compiled by LSEG

** Shares down 23.5% this year, till last close