Three Months Ended

Six Months Ended

April 1,
2012

April 3,
2011

April 1,
2012

April 3,
2011

(in thousands, except per share data)

Net income attributable to Tetra Tech

$

22,284

$

17,500

$

44,894

$

39,801

Weighted-average common shares outstanding – basic

63,072

62,121

62,846

61,836

Effect of dilutive stock options and unvested restricted stock

745

824

651

802

Weighted-average common stock outstanding – diluted

63,817

62,945

63,497

62,638

Earnings per share attributable to Tetra Tech:

Basic

$

0.35

$

0.28

$

0.71

$

0.64

Diluted

$

0.35

$

0.28

$

0.71

$

0.64