The law firm of Kirby McInerney LLP reminds investors of its investigation on behalf of OSI Systems, Inc. (“OSI” or the “Company”) (NASDAQ: OSIS) investors concerning the Company’s and/or members of its senior management’s possible violation of the federal securities laws or other unlawful business practices.

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What Happened?

On August 20, 2026, OSI reported its fourth quarter 2026 and full-year 2026 financial results, revealing fourth quarter revenue that fell short of analysts’ expectations by 8.5%, with sales falling 4.1% year-on-year to $484.1 million. The Company attributed the revenue shortfall to Security division delivery disruptions caused by conflicts in the Middle East, stating, “these results were affected by the timing of approximately $50 million of planned Security deliveries that moved beyond our June 30^th fiscal year-end because of conflict-related delays and site access constraints in the Middle East.” On this news, OSI’s stock price fell $11.36, or 5.21%, to close at $206.73 per share on August 21, 2026.

What Should I Do?

At this stage, no lawsuit has been filed. The investigation is ongoing to determine whether claims may be brought under federal securities laws.

If you purchased or otherwise acquired OSI securities, have information, or would like to learn more about this investigation, please contact Lauren Molinaro of Kirby McInerney LLP by email at investigations@kmllp.com, or fill out the contact form below, to discuss your rights or interests with respect to these matters at no cost.

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Kirby McInerney LLP is a New York-based plaintiffs’ law firm concentrating in securities, antitrust, whistleblower, and consumer litigation. The firm’s efforts on behalf of shareholders in securities litigation have resulted in recoveries totaling billions of dollars. Additional information about the firm can be found at Kirby McInerney LLP’s website.

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