** Shares of IT services and consulting firm Accenture ACN.N drop 11% to $137.7 premarket

** Co cuts the top end of its annual revenue growth forecast range

** Co now expects annual revenue growth of between 3% to 4%, compared with its prior forecast of 3% to 5%

** ACN forecasts Q4 revenue between $17.75 billion and $18.4 billion, below analysts estimate of $18.47 billion, according to data compiled by LSEG

** Co strikes deal to acquire majority stake in Dragos, fully acquire runZero and NetRise in a combined deal valued at $4.18 billion

** Third-quarter revenue of $18.72 billion misses analysts estimate of $18.75 billion

** Up to last close, stock down ~42% YTD