| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Young Micah W | EVP & Chief Financial Officer | C/O MASIMO CORPORATION, 52 DISCOVERY, IRVINE | /s/ Micah W. Young, Attorney-In-Fact | 03 Mar 2026 | 0001717871 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MASI | Common Stock | Award | $0 | +15,000 | +82% | $0.000000 | 33,347 | 27 Feb 2026 | Direct | F1, F2 |
| transaction | MASI | Common Stock | Tax liability | $1,419,108 | -8,093 | -24% | $175.35 | 25,254 | 27 Feb 2026 | Direct | F3 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MASI | Restricted Stock Units | Options Exercise | $0 | -15,000 | -100% | $0.000000 | 0 | 27 Feb 2026 | Common Stock | 15,000 | Direct | F1, F4 |
| Id | Content |
|---|---|
| F1 | As previously reported, the reporting person was granted 30,000 restricted stock units on March 1, 2024, 50% of which vested on March 1, 2025. The remaining 15,000 restricted stock units vested on February 27, 2026. |
| F2 | For the vesting that occurred on March 1, 2026, the Issuer calculated the number of vested shares and shares withheld for tax liability based on its closing stock price on the immediately preceding business day. As a result, the Reporting person received 6,907 shares of common stock, as shown in Table I. |
| F3 | These shares were withheld by the Issuer in order to satisfy certain tax withholding obligations in connection with the issuance of shares upon the vesting of certain restricted stock units. |
| F4 | Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of the Issuer upon vesting of the RSU. |