** Shares of Plains All American PAA.O down 1% at $16.74
** Co reports Q1 revenue of $12.01 bln, its third straight miss, below analysts' avg. estimate of $14.14 bln - data compiled by LSEG
** Also reports Q1 adj. profit of $0.39 per share, below estimate of $0.43 per share
** As of last close, stock down ~0.82% YTD
(Reporting by Megha Kumari)
((Megha.Kumari@thomsonreuters.com;))