X0609 4 2026-08-24 0001039065 OSI SYSTEMS INC OSIS 0001505398 Tropeano Michael false 12525 CHADRON AVE. HAWTHORNE CA 90250 false true false false PRESIDENT, RAPISCAN SYSTEMS 0 Common Stock 2026-08-24 4 A 0 287 206.73 A 5102 D Common Stock 2026-08-24 4 F 0 99 206.73 D 5003 D RSUs are issued pursuant to performance based vestings. The amount of securities beneficially owned following the reported transaction has been adjusted to reflect the reduction of 466 shares that were inadvertently omitted from prior ownership reports. This adjustment corrects the reporting of the Reporting Person's beneficial ownership and does not result from a current transaction. Pursuant with a net settlement, shares of stock were tendered to pay for the tax withholding. No shares of stock were sold. /s/ Michael Tropeano 2026-08-26