Retirement Plans (Tables)

9 Months Ended

Oct. 02, 2022

Defined Benefit Pension Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three and nine months ended October 2, 2022 and October 3, 2021, Teradyne’s net periodic pension cost was comprised of the following:

	For the Three Months Ended
	October 2, 2022						October 3, 2021
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	397		$	153		$	452		$	240
Interest cost		1,222			96			1,098			86
Expected return on plan assets		(732	)		(16	)		(936	)		(17	)
Total net periodic pension cost	$	887		$	233		$	614		$	309

	For the Nine Months Ended
	October 2, 2022						October 3, 2021
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	1,191		$	539		$	1,357		$	720
Interest cost		3,665			333			3,295			257
Expected return on plan assets		(2,195	)		(54	)		(2,809	)		(50	)
Net actuarial gain		(45	)		—			(400	)		—
Total net periodic pension cost	$	2,616		$	818		$	1,443		$	927

Postretirement Benefit Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three and nine months ended October 2, 2022 and October 3, 2021, Teradyne’s net periodic postretirement benefit cost (credit) was comprised of the following:

	For the Three Months Ended						For the Nine Months Ended
	October 2, 2022			October 3, 2021			October 2, 2022			October 3, 2021
	(in thousands)
Service cost	$	16		$	16		$	48		$	48
Interest cost		44			43			132			128
Amortization of prior service credit		(2	)		(2	)		(7	)		(7	)
Net actuarial loss (gain)		—			—			54			(228	)
Total net periodic postretirement benefit cost (credit)	$	58		$	57		$	227		$	(59	)