Exhibit 99.1 OSI SYSTEMS REPORTS FISCAL 2025 FOURTH QUARTER AND FULL FISCAL YEAR FINANCIAL RESULTS HAWTHORNE, Calif. — (BUSINESS WIRE) — August 21, 2025 — OSI Systems, Inc. (the "Company" or "OSI Systems") (NASDAQ: OSIS) today announced its financial results for the three months and fiscal year ended June 30, 2025. Ajay Mehra, OSI Systems' President and Chief Executive Officer, stated "We are pleased to report record-breaking fourth quarter and 2025 fiscal year revenues and non-GAAP earnings per share, led ...