Is SentinelOne Stock a Buy After a Director Scooped Up 40,000 Shares in the Company? | The Motley Fool

On Dec. 16, 2025, Mark S. Peek, a member of the Board of Directors of SentinelOne ( S +0.82%), executed an open-market buy of 40,000 shares, totaling an approximate value of $595,600, as reported in the SEC Form 4 filing . Transaction summary Metric Value Shares traded 40,000 Transaction value ~$595,600 Post-transaction shares (direct) 43,501 Post-transaction shares (indirect) 120,000 Post-transaction value (direct ownership) ~$643,815 Transaction value based on SEC Form 4 weighted average purchase price ($14.89). Key questions What is the significance of the 40,000-share purchase relative to Mr. Peek’s historical trading? This is the largest single transaction by Mark S. Peek on record, with no comparable historical sell events and a median administrative trade size of zero shares; it marks a notable shift toward increasing indirect exposure. How did this transaction impact direct and indirect ownership structures? The purchase increased indirect holdings through the Omega Living Trust to 120,000 shares, while direct holdings remained constant at 43,501 shares. What does the current post-transaction ownership indicate about remaining capacity? Following the transaction, Mr. Peek retains 43,501 shares directly and 120,000 shares indirectly. Additional shares reside in four children's trusts containing 5,527 shares each. How does the transaction align with prevailing market conditions for SentinelOne? The purchase was made as SentinelOne shares were priced at $14.89, near the Dec. 16, 2025 market close of $14.80, in the context of a one-year total return of -34.33%, signaling opportunistic accumulation. Company overview Metric Value Price (as of market close Dec. 16, 2025) $14.89 Market capitalization $5.01 billion Revenue (TTM) $955.65 million Net income (TTM) ($411.29 million) * 1-year performance is calculated using Dec. 16, 2025 as the reference date. Company snapshot SentinelOne delivers cybersecurity solutions, including its Singularity XDR Platform, providing AI-powered autonomous threat prevention, detection, and response across endpoints and cloud workloads. SentinelOne targets large enterprises and organizations seeking advanced, automated protection against evolving cyber threats, both in the United States and internationally. SentinelOne is a technology company specializing in cybersecurity, with a focus on autonomous threat detection and response solutions. The company leverages artificial intelligence to deliver scalable protection for enterprise clients in the software infrastructure segment. Its unified platform and AI-driven approach enable rapid threat mitigation, supporting organizations in managing complex security challenges. What this transaction means for investors The purchase of SentinelOne stock by Board of Directors member Mark S. Peek suggests he has a bullish outlook towards the company. He bought shares just days before they reached a 52-week low of $14.43 on Dec. 18, indicating he believes the stock has upside. It's understandable why Mr. Peek might think positively of SentinelOne. The company's revenue has steadily grown every quarter over the past year, hitting $258.9 million in its fiscal third quarter, ended Oct. 31. That represented strong 23% year-over-year sales growth. However, SentinelOne is not profitable, exiting fiscal Q3 with a net loss of $60.3 million. The cybersecurity giant also announced fiscal Q4 guidance that disappointed Wall Street. SentinelOne expects Q4 sales of $271 million, a 20%...

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