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Notable Analyst Rating Changes 02/26: RST, AZN/GSK, CHA/CHU, OSIS, LAMR Upgraded; PALM, DPS, ATHN, FLR, MOT Downgraded Feb 26, 2010 10:20AM
Morgan Keegan Upgrades OSI Systems (OSIS) to Outperform Feb 26, 2010 07:54AM
Morgan Keegan Downgrades OSI Systems (OSIS) to Market Perform Jan 19, 2010 08:21AM
Morgan Keegan Upgrades OSI Systems (OSIS) to Outperform; Positive Earnings Results Oct 28, 2009 09:03AM
Morgan Keegan Downgrades OSI Systems (OSIS) to Market Perform Feb 10, 2009 10:42AM