For the Three Months
 Ended

For the Nine Months
 Ended

September 27,
2026

September 28,
2025

September 27,
2026

September 28,
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

$

342,407

$

119,558

$

1,115,849

$

296,827

Weighted average common shares-basic

156,262

158,595

156,381

160,021

Effect of dilutive potential common shares:

Restricted stock units

1,159

495

1,149

366

Stock options

79

4

78

3

Employee stock purchase plan

2

3

2

19

Dilutive potential common shares

1,240

502

1,229

388

Weighted average common shares-diluted

157,502

159,097

157,610

160,409

Earnings per common share attributable to Teradyne - basic

$

2.19

$

0.75

$

7.14

$

1.85

Earnings per common share attributable to Teradyne - diluted

$

2.17

$

0.75

$

7.08

$

1.85