Form 4: SentinelOne CAO's Routine Stock Activity

SentinelOne's Chief Accounting Officer, Robin Tomasello, reported the vesting of performance-based restricted stock units and a subsequent sale to cover tax obligations.

Summary

• Robin Tomasello, SentinelOne's Chief Accounting Officer, reported transactions involving Class A Common Stock.
• On March 23, 2026, 4,148 shares were acquired due to the certification of the second of four tranches of a performance-based restricted stock unit (PRSU) award.
• This tranche represented one-fourth of the 2024 PRSU Award, earned at 90.2% of the target amount granted.
• The performance restricted stock units so earned are fully vested and may be settled for shares of Class A common stock.
• On March 25, 2026, 1,496 shares were sold at $13.37 per share to cover tax withholding obligations in connection with the vesting and settlement of the PRSUs.
• This sale was mandated by the Issuer and was not a discretionary trade by the Reporting Person.
• Following these transactions, Tomasello beneficially owns 403,523 shares of Class A Common Stock.

Sentiment

Score: 7

Explanation: StockSavvy.ai views this as a moderately positive signal, as the vesting of performance-based restricted stock units indicates the achievement of corporate performance milestones, while the subsequent sale is a routine tax-related event.

Positives

• The certification of the second tranche of the 2024 PRSU Award indicates the achievement of pre-determined corporate performance milestones.
• One-fourth of the 2024 PRSU Award was earned at 90.2% of the target amount, reflecting strong performance against set objectives.

Negatives

• The sale of 1,496 shares, although non-discretionary and for tax purposes, reduces the insider's direct ownership in the company.

Future Outlook

The filing does not contain specific forward-looking statements or guidance regarding the company's future performance.

Management Comments

• The sale reported on this Form 4 represents an Issuer mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of performance-based Restricted Stock Units, and it does not represent a discretionary trade by the Reporting Person.

Industry Context

StockSavvy.ai notes that 'sell to cover' transactions are standard practice for equity compensation, particularly for performance-based awards, and are common across the technology sector as a mechanism for executives to manage tax liabilities upon vesting.

Comparison to Industry Standards

• "Sell to cover" transactions are a common and accepted practice for managing tax obligations related to equity compensation across all industries, including tech companies like Microsoft, Apple, and Google, where executives frequently receive stock-based awards. This transaction aligns with typical industry practices for executive compensation and tax management.

Stakeholder Impact

• Shareholders may view the vesting of performance-based awards as a positive indicator of management's alignment with company performance goals.
• The 'sell to cover' transaction has a minimal, routine impact on the outstanding share count and is not indicative of a change in management's long-term outlook.

Next Steps

• Vesting of the remaining tranches of the 2024 PRSU Award will be based on the achievement of pre-determined corporate performance milestones and continued service.

Key Dates

Recommendation

This Form 4 reports a routine insider transaction involving the vesting of performance-based equity awards and a subsequent non-discretionary sale to cover tax obligations. It does not provide new fundamental information that would alter the investment thesis for SentinelOne, thus a 'hold' recommendation is maintained.

Keywords

SentinelOne, S, Form 4, Insider Trading, Stock Transaction, Restricted Stock Units, Performance Awards, Executive Compensation, Sell to Cover, Robin Tomasello