Retirement Plans (Tables)

3 Months Ended

Mar. 29, 2026

Net Periodic Pension and Postretirement Benefit Costs

For the three months ended March 29, 2026, and March 30, 2025, Teradyne’s net periodic pension cost was comprised of the following:

	For the Three Months Ended
	March 29, 2026						March 30, 2025
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	143		$	299		$	214		$	124
Interest cost		1,359			349			1,709			262
Expected return on plan assets		(975	)		(54	)		(1,317	)		(22	)
Total net periodic pension cost	$	527		$	594		$	606		$	364

Postretirement Benefit Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three months ended March 29, 2026, and March 30, 2025, Teradyne’s net periodic postretirement benefit cost was comprised of the following:

	For the Three Months  Ended
	March 29, 2026			March 30, 2025
	(in thousands)
Service cost	$	7		$	10
Interest cost		68			73
Amortization of prior service credit		(1	)		(2	)
Special termination benefits		—			684
Total net periodic postretirement benefit cost	$	74		$	765