X0306 4 2020-07-08 0 0001039065 OSI SYSTEMS INC OSIS 0001286090 SZE VICTOR S 12525 CHADRON AVE HAWTHORNE CA 90250 0 1 0 0 General Counsel Common Stock 2020-07-08 4 A 0 19483 0 A 188467 D Common Stock 30136 I Please see Footnote 1 Shares are restricted stock units issued to the Reporting Person pursuant to the OSI Systems, Inc. Amended and Restated 2012 Incentive Award Plan. Vesting and amount of shared is subject to achievement of performance targets. Victor So-Mien Sze & Angela Hsin-Chi Hsu Co-ttee Sze Trust U/T/A DTD 11/25/2014 /s/ Victor Sze 2020-07-10