 Alliancebernstein L.P. raised its position in shares of OSI Systems, Inc. NASDAQ:OSIS by 1.1 in the first quarter, according to its most recent 13F filing with the Securities and Exchange Commission SEC. The institutional investor owned 653,555 shares of the technology companys stock after purchasing an additional 6,977 shares during the period. Alliancebernstein L.P.s holdings ... 