Form 4: Masimo CEO's Stock Activity: RSU Vesting & Tax Withholding

Masimo CEO Catherine M. Szyman reported the vesting of restricted stock units and subsequent sale of shares for tax obligations on March 11, 2026.

Summary

• CEO Catherine M. Szyman reported transactions on March 11, 2026, involving Masimo Corporation common stock and restricted stock units (RSUs).
• 2,101 Restricted Stock Units (RSUs) vested, converting into common stock, as part of a previously granted award.
• These vested RSUs represent 25% of an 8,407-unit grant made on March 11, 2025, which vests ratably over four years.
• 1,069 shares of common stock were disposed of at a price of $175.47 per share to satisfy tax withholding obligations related to the RSU vesting.
• Following these transactions, Catherine M. Szyman directly owns 7,605 shares of common stock and 6,306 unvested Restricted Stock Units.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, reflecting routine executive compensation and tax management, with no direct positive or negative implications for the company's operational or financial performance.

Future Outlook

This filing does not contain any forward-looking statements or guidance regarding the company's future performance or strategic direction.

Industry Context

StockSavvy.ai notes this is a standard insider transaction related to executive compensation, common across industries for publicly traded companies. The vesting of restricted stock units and subsequent sale of shares for tax purposes are routine events in executive compensation plans.

Comparison to Industry Standards

• StockSavvy.ai observes that the vesting of restricted stock units and subsequent tax-related sales are standard practices for executive compensation across major U.S. corporations, aligning with typical equity incentive plans designed to incentivize long-term performance and align management interests with shareholders.

Stakeholder Impact

• Shareholders: The vesting of RSUs results in a minor increase in outstanding shares, which is a standard component of equity compensation plans. The tax-related sale is a routine event and does not indicate a change in management's confidence or a strategic shift.
• Employees: This filing reflects standard executive compensation practices, which are generally understood within the company's compensation framework.

Next Steps

• Future vesting of the remaining 6,306 Restricted Stock Units will occur ratably over the next three years on March 11, 2027, March 11, 2028, and March 11, 2029.

Key Dates

Recommendation

This Form 4 filing details a routine insider transaction involving the vesting of restricted stock units and a subsequent sale of shares to cover tax obligations. Such transactions are standard components of executive compensation and do not typically signal a change in the company's fundamental outlook or the insider's confidence. Therefore, it provides no new information that would warrant a change in investment recommendation, suggesting a 'hold' position is appropriate based solely on this filing.

Keywords

Masimo, MASI, Form 4, insider transaction, restricted stock units, RSU vesting, CEO, Catherine Szyman, beneficial ownership