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StocksMedium•13 February 2026•

1 min read

F5 Inc. Stock Plunges 24% Amid Class Action Lawsuit Alleging Undisclosed Data Breach

A securities class action lawsuit has been filed against F5, Inc. and its executives, alleging a failure to disclose material information regarding a significant data breach. The lawsuit, brought to investors' attention by Kahn Swick & Foti, LLC (KSF), centers on a breach involving F5's highest revenue product, BIG-IP. This alleged non-disclosure, coupled with the announcement of below-market growth expectations for fiscal year 2026, triggered a substantial 24% decline in F5's stock price. Investors who purchased F5 securities between October 28, 2024, and October 27, 2025, are encouraged to contact KSF to discuss their legal rights. The deadline for lead plaintiff applications is set for February 17, 2026. This legal challenge underscores significant reputational and financial risks for the technology firm.