Employee Benefits	6 Months Ended
Jun. 28, 2025
Postemployment Benefits [Abstract]
Employee Benefits	21. Employee Benefits Defined Contribution Plan In the U.S. the Company sponsors one qualified defined contribution plan or 401(k) plan, the Masimo Retirement Savings Plan (MRSP), covering the Company’s full-time U.S. employees who meet certain eligibility requirements. The MRSP matches 100% of a participant’s salary deferral, up to 3% of each participant’s compensation for the pay period, subject to a maximum amount. The Company may also contribute to the MRSP on a discretionary basis. The Company contributed $1.0 million and $1.1 million to the MRSP for each of the three months ended June 28, 2025 and June 29, 2024, respectively, all in the form of matching contributions. The Company contributed $2.0 million and $2.1 million to the MRSP for each of the six months ended June 28, 2025 and June 29, 2024, respectively, all in the form of matching contributions. In addition, some of the Company’s international subsidiaries also have defined contribution plans to which both the employee and employers are eligible to make contributions. The Company contributed $0.6 million and $0.5 million to these plans for the three months ended June 28, 2025 and June 29, 2024, respectively. The Company contributed $1.1 million and $1.0 million to these plans for the six months ended June 28, 2025 and June 29, 2024, respectively. Defined Benefit Plans The Company sponsors several international noncontributory defined benefit plans. The service cost component for the defined benefit plans are recorded in operating expenses in the condensed consolidated statement of operations. All other cost components are recorded in other income (expense), net in the condensed consolidated statement of operations. The Company’s net periodic defined benefit costs for each of the three and six months ended June 28, 2025, and June 29, 2024 were immaterial.

In the U.S. the Company sponsors one qualified defined contribution plan or 401(k) plan, the Masimo Retirement Savings Plan (MRSP), covering the Company’s full-time U.S. employees who meet certain eligibility requirements.

The MRSP matches 100% of a participant’s salary deferral, up to 3% of each participant’s compensation for the pay period, subject to a maximum amount. The Company may also contribute to the MRSP on a discretionary basis. The Company contributed $1.0 million and $1.1 million to the MRSP for each of the three months ended June 28, 2025 and June 29, 2024, respectively, all in the form of matching contributions. The Company contributed $2.0 million and $2.1 million to the MRSP for each of the six months ended June 28, 2025 and June 29, 2024, respectively, all in the form of matching contributions.

In addition, some of the Company’s international subsidiaries also have defined contribution plans to which both the employee and employers are eligible to make contributions. The Company contributed $0.6 million and $0.5 million to these plans for the three months ended June 28, 2025 and June 29, 2024, respectively. The Company contributed $1.1 million and $1.0 million to these plans for the six months ended June 28, 2025 and June 29, 2024, respectively.

The Company sponsors several international noncontributory defined benefit plans. The service cost component for the defined benefit plans are recorded in operating expenses in the condensed consolidated statement of operations. All other cost components are recorded in other income (expense), net in the condensed consolidated statement of operations.

The Company’s net periodic defined benefit costs for each of the three and six months ended June 28, 2025, and June 29, 2024 were immaterial.