** Shares of architectural solutions firm Armstrong World Industries AWI.N down more than 2% at about $188 premarket
** Co expects annual adjusted profit below Wall Street estimates as challenging market conditions persists
** It forecasts 2026 adjusted profit between $8.05 and $8.35 per share, below estimates of $8.44- data compiled by LSEG
** Posts Q4 adjusted EPS of $1.61/share vs analysts' average estimates of $1.68/share
** AWI announces CEO Vic Grizzle will be replaced by Mark Hershey
** As of last close, stock had risen nearly 1% YTD
(Reporting by Apratim Sarkar in Bengaluru)
((Apratim.Sarkar@thomsonreuters.com))