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Notable Analyst Rating Changes 12/19: (TLM) (URI) (BMC) Upgraded; (GGP) (LPX) (RIMM) Downgraded Dec 19, 2011 11:25AM
JPMorgan Starts Imperva (IMPV) at Overweight Dec 19, 2011 07:37AM
Imperva (IMPV) IPO Surges Higher Nov 9, 2011 10:01AM
Imperva (IMPV) Files $75M IPO Jun 20, 2011 11:06AM