The following table sets forth the computation of basic and diluted earnings per common share attributable to Teradyne:


	For the Three Months Ended				For the Six Months Ended
	June 28, 2026		June 29, 2025		June 28, 2026		June 29, 2025
	(in thousands, except per share amounts)				(in thousands, except per share amounts)
Net income attributable to Teradyne for basic and diluted earnings per common share	$	374,533	$	78,372	$	773,442	$	177,269
Weighted average common shares-basic		156,470		159,967		156,440		160,734
Effect of dilutive potential common shares:
Restricted stock units		1,142		160		1,145		302
Stock options		81		2		77		3
Employee stock purchase plan		—		6		2		26
Dilutive potential common shares		1,223		168		1,224		331
Weighted average common shares-diluted		157,693		160,135		157,664		161,065
Earnings per common share attributable to Teradyne - basic	$	2.39	$	0.49	$	4.94	$	1.10
Earnings per common share attributable to Teradyne - diluted	$	2.38	$	0.49	$	4.91	$	1.10

The computation of diluted earnings per common share attributable to Teradyne for the three and six months ended June 28, 2026, excludes the effect of the potential vesting of less than 0.1 million of restricted stock units because the effect would have been anti-dilutive. The computation of diluted earnings per common share attributable to Teradyne for the three and six months ended June 29, 2025, excludes the effect of the potential vesting of 1.4 million and 1.9 million, respectively, of restricted stock units because the effect would have been anti-dilutive.