Stock-Based Compensation (Tables)

6 Months Ended

Jun. 29, 2025

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Estimated Fair Value of TSR Performance-Based Restricted Stock Unit Awards Assumptions

The grant date fair value was estimated using the Monte Carlo simulation model with the following assumptions:

	For the Six Months  Ended
	June 29, 2025			June 30, 2024
Risk-free interest rate		4.1	%		3.9	%
Teradyne volatility-historical		41.7	%		42.4	%
NYSE Composite Index volatility-historical		14.7	%		15.6	%
Dividend yield		0.4	%		0.5	%

Fair Value of Stock Options Using Assumptions

The fair value of stock options was estimated using the Black-Scholes option-pricing model with the following assumptions:

	For the Six Months  Ended
	June 29, 2025			June 30, 2024
Expected life (years)		4.0			4.0
Risk-free interest rate		4.2	%		4.0	%
Volatility-historical		43.9	%		46.3	%
Dividend yield		0.4	%		0.5	%