Stock-Based Compensation (Tables)

6 Months Ended

Jun. 28, 2026

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 28, 2026				June 29, 2025
Risk-free interest rate			3.6	%			4.1	%
Teradyne volatility-historical			47.9	%			41.7	%
S&P 500 Constituents volatility-historical			27.6	%
NYSE Composite Index volatility-historical							14.7	%
Dividend yield			0.2	%			0.4	%

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 28, 2026				June 29, 2025
Expected life (years)			3.5				4.0
Risk-free interest rate			3.7	%			4.2	%
Volatility-historical			47.1	%			43.9	%
Dividend yield			0.2	%			0.4	%