Retirement Plans (Tables)

6 Months Ended

Jun. 29, 2025

Net Periodic Pension and Postretirement Benefit Costs

For the three and six months ended June 29, 2025, and June 30, 2024, Teradyne’s net periodic pension cost was comprised of the following:


		For the Three Months Ended
		June 29, 2025								June 30, 2024
		United States				Foreign				United States				Foreign
		(in thousands)
Service cost		$	96			$	150			$	217			$	114
Interest cost			1,165				301				1,646				243
Expected return on plan assets			(665	)			(25	)			(1,265	)			(18	)
Net actuarial loss (gain)			41				—				111				(242	)
Settlement loss (gain)			—				—				—				(24	)
Total net periodic pension cost		$	637			$	426			$	709			$	73


		For the Six Months Ended
		June 29, 2025								June 30, 2024
		United States				Foreign				United States				Foreign
		(in thousands)
Service cost		$	309			$	289			$	448			$	231
Interest cost			2,873				595				3,293				489
Expected return on plan assets			(1,981	)			(50	)			(2,533	)			(34	)
Net actuarial loss (gain)			41				—				111				(242	)
Settlement loss (gain)			—				—				—				(24	)
Total net periodic pension cost		$	1,242			$	834			$	1,319			$	420

Postretirement Benefit Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three and six months ended June 29, 2025, and June 30, 2024, Teradyne’s net periodic postretirement benefit cost was comprised of the following:


		For the Three Months Ended								For the Six Months Ended
		June 29, 2025				June 30, 2024				June 29, 2025				June 30, 2024
		(in thousands)								(in thousands)
Service cost		$	8			$	9			$	18			$	18
Interest cost			80				72				153				145
Amortization of prior service credit			(2	)			(2	)			(4	)			(4	)
Special termination benefits			—				170				684				462
Net actuarial loss (gain)			87				(94	)			87				(94	)
Total net periodic postretirement benefit cost		$	173			$	155			$	938			$	527