Retirement Plans

9 Months Ended

Sep. 29, 2024

Retirement Plans

Q. RETIREMENT PLANS

ASC 715, “Compensation—Retirement Benefits,” requires an employer with defined benefit plans or other postretirement benefit plans to recognize an asset or a liability on its balance sheet for the overfunded or underfunded status of the plans as defined by ASC 715. The pension asset or liability represents a difference between the fair value of the pension plan’s assets and the projected benefit obligation at December 31. Teradyne uses a December 31 measurement date for all its plans.

Defined Benefit Pension Plans

Teradyne has defined benefit pension plans covering a portion of domestic employees and employees of certain non-U.S. subsidiaries. Benefits under these plans are based on employees’ years of service and compensation. Teradyne’s funding policy is to make contributions to these plans in accordance with local laws and to the extent that such contributions are tax deductible. The assets of the U.S. qualified pension plan consist primarily of fixed income and equity securities. In addition, Teradyne has an unfunded supplemental executive defined benefit plan in the United States to provide retirement benefits in excess of levels allowed by the Employment Retirement Income Security Act (“ERISA”) and the Internal Revenue Code (the “IRC”), as well as unfunded qualified foreign plans.

During the three months ended September 29, 2024, Teradyne purchased a group annuity contract for its retiree participants in the U.S. qualified pension plan. Under the group annuity, the accrued pension obligation for 132 retiree participants were transferred to an insurance company. The reduction in the pension benefit obligation and pension assets was $23.4 million. During the three and nine months ended September 29, 2024, Teradyne recorded settlement expense of $0.4 million related to the retiree group annuity transaction.

In the nine months ended September 29, 2024, and October 1, 2023, Teradyne contributed $2.3 million and $2.3 million, respectively, to the U.S. supplemental executive defined benefit pension plan, and $0.8 million and $0.8 million, respectively, to certain qualified pension plans for non-U.S. subsidiaries.

For the three and nine months ended September 29, 2024, and October 1, 2023, Teradyne’s net periodic pension cost was comprised of the following:

	For the Three Months Ended
	September 29, 2024						October 1, 2023
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	216		$	119		$	272		$	107
Interest cost		1,590			256			1,713			253
Expected return on plan assets		(1,204	)		(23	)		(1,286	)		(11	)
Net actuarial loss (gain)		(2,262	)		—			—			66
Settlement expense		394			—			—			5
Total net periodic pension cost	$	(1,266	)	$	352		$	699		$	420

	For the Nine Months Ended
	September 29, 2024						October 1, 2023
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	665		$	360		$	815		$	320
Interest cost		4,883			766			5,138			762
Expected return on plan assets		(3,737	)		(58	)		(3,856	)		(28	)
Net actuarial loss (gain)		(2,151	)		(242	)		24			66
Settlement expense		394			(24	)		—			5
Total net periodic pension cost	$	54		$	802		$	2,121		$	1,125

Postretirement Benefit Plan

In addition to receiving pension benefits, Teradyne employees in the United States who meet early retirement eligibility requirements as of their termination dates may participate in Teradyne’s Welfare Plan, which includes medical and dental benefits up to age 65. Death benefits provide a fixed sum to retirees’ survivors and are available to all retirees. Substantially all of Teradyne’s current U.S. employees could become eligible for these benefits and the existing benefit obligation relates predominantly to those

employees. During the nine months ended September 29, 2024, Teradyne recorded special termination benefit charges associated with a voluntary early retirement program.

For the three and nine months ended September 29, 2024, and October 1, 2023, Teradyne’s net periodic postretirement benefit cost was comprised of the following:

	For the Three Months  Ended						For the Nine Months  Ended
	September 29, 2024			October 1, 2023			September 29, 2024			October 1, 2023
	(in thousands)						(in thousands)
Service cost	$	9		$	9		$	28		$	26
Interest cost		72			60			217			181
Amortization of prior service credit		(2	)		(2	)		(7	)		(7	)
Special termination benefits		—			1,423			462			1,792
Net actuarial loss (gain)		—			—			(94	)		30
Total net periodic postretirement benefit cost	$	79		$	1,490		$	606		$	2,022