SentinelOne (S) to Acquire Prompt Security in $250M Deal

SentinelOne Inc. (NYSE: S) is one of the fastest-growing tech stocks to invest in. On August 5, 2025, the company announced a definitive agreement to acquire Prompt Security, a cutting-edge startup specializing in securing generative AI applications.

The deal, valued at approximately $250 million, will be completed using a mix of cash and stock and is expected to close in SentinelOne’s third fiscal quarter of 2026, pending regulatory approvals and customary closing conditions.

The acquisition strengthens SentinelOne’s Singularity platform by integrating Prompt Security’s capabilities, which protect against prompt injection, data leakage, and model misuse in real time. This move positions SentinelOne as one of the few cybersecurity companies directly addressing the growing risks around enterprise AI deployments.

The company plans to deliver model-agnostic protection across platforms, including OpenAI, Anthropic, and on-premise systems, providing enterprises with more visibility and control over their AI usage policies.

SentinelOne Inc. (NYSE: S) is a leading cybersecurity company recognized for its AI-powered Singularity platform, which provides autonomous endpoint protection, cloud security, and identity solutions designed to safeguard modern enterprise infrastructure.

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