Retirement Plans (Tables)

6 Months Ended

Jun. 28, 2026

Net Periodic Pension and Postretirement Benefit Costs

For the three and six months ended June 28, 2026, and June 29, 2025, Teradyne’s net periodic pension cost was comprised of the following:


		For the Three Months Ended
		June 28, 2026								June 29, 2025
		United States				Foreign				United States				Foreign
		(in thousands)
Service cost		$	143			$	296			$	96			$	150
Interest cost			1,358				345				1,165				301
Expected return on plan assets			(975	)			(54	)			(665	)			(25	)
Net actuarial loss (gain)			(43	)			—				41				—
Total net periodic pension cost		$	483			$	586			$	637			$	426


		For the Six Months Ended
		June 28, 2026								June 29, 2025
		United States				Foreign				United States				Foreign
		(in thousands)
Service cost		$	286			$	598			$	309			$	289
Interest cost			2,716				697				2,873				595
Expected return on plan assets			(1,950	)			(109	)			(1,981	)			(50	)
Net actuarial loss (gain)			(43	)			—				41				—
Total net periodic pension cost		$	1,009			$	1,187			$	1,242			$	834

Postretirement Benefit Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three and six months ended June 28, 2026, and June 29, 2025, Teradyne’s net periodic postretirement benefit cost was comprised of the following:


		For the Three Months Ended								For the Six Months Ended
		June 28, 2026				June 29, 2025				June 28, 2026				June 29, 2025
		(in thousands)								(in thousands)
Service cost		$	7			$	8			$	15			$	18
Interest cost			66				80				134				153
Amortization of prior service credit			(1	)			(2	)			(2	)			(4	)
Special termination benefits			—				—				—				684
Net actuarial loss (gain)			(114	)			87				(114	)			87
Total net periodic postretirement benefit cost		$	(42	)		$	173			$	32			$	938