Young Micah W 4

What Happened

• Micah W. Young, Chief Financial Officer of Masimo Corp (MASI), had 873 restricted stock units (RSUs) vest on March 11, 2026. The RSUs converted to 873 shares of common stock. To satisfy tax withholding obligations, 471 shares were withheld (disposed) at $175.47 per share for a withholding amount of $82,646, leaving a net ~402 shares issued to Young.
• This was not a market purchase or open-market sale but the scheduled vesting/settlement of compensation awards (RSUs). Withholding for taxes is a routine administrative step, not a directional buy/sell decision.

Key Details

• Transaction date: March 11, 2026; Form 4 filed March 16, 2026 (filed after the typical 2-business-day Form 4 deadline).
• Shares vested/converted: 873 RSUs → 873 shares.
• Shares withheld for taxes: 471 shares at $175.47 each = $82,646 withheld.
• Net shares delivered to insider: 873 − 471 = 402 shares (approx. $70,539 at $175.47/share).
• Footnotes: (F1) 3,495 RSUs were granted on March 11, 2025 and vest ratably over 4 years (25% vested on March 11, 2026). (F2) Shares were withheld to satisfy tax withholding. (F3) Each RSU equals one share upon vesting.
• Shares owned after the transaction: not specified in the filing.

Context

• This is a routine RSU vesting and tax-withholding event (stock settlement), often reported as conversion/exercise of a derivative (Form 4 code M) and withholding (code F). The withheld shares are common in cashless-withholding settlements and do not necessarily signal an intent to buy or sell additional stock.
• Note the Form 4 was filed on March 16, 2026 for a March 11 transaction, which appears to be later than the typical 2-business-day reporting requirement.