** Shares of cybersecurity firm Commvault Systems CVLT.O fall 14.4% to $149.03

** CVLT reports Q2 adjusted EPS of 91 cents vs analysts' avg. est. of 94 cents - data compiled by LSEG

** Co reports Q2 revenue of $276.2 mln vs estimates of $276.9 mln

** CVLT expects Q3 revenue between $298 million and $300 million

** As of last close, stock was up ~15% this year

(Reporting by Anhata Rooprai and Tharuniyaa Lakshmi)

((Anhata.Rooprai@thomsonreuters.com))