MICROSEMI CORPORATION

Selected GAAP and Non-GAAP Financial Measures

(Unaudited, in millions except, for percentages and per share amounts)

Quarter Ended

Dec 30,
2012

Sep 30,
2012

Jan 1,
2012

Net sales

$

247.6

$

263.1

$

240.9

Selected GAAP Financial Measures

Gross profit

$

142.6

$

150.4

$

125.7

Gross margin

57.6%

57.2%

52.2%

Operating income (loss)

$

25.5

$

26.6

$

(0.7)

Operating margin

10.3%

10.1%

(0.3)%

Net income (loss)

$

14.2

$

11.6

$

(44.6)

Diluted earnings (loss) per share

$

0.16

$

0.13

$

(0.52)

Selected Non-GAAP Financial Measures

Gross profit

$

142.6

$

150.4

$

131.9

Gross margin

57.6%

57.2%

54.7%

Operating income

$

56.7

$

64.5

$

51.8

Operating margin

22.9%

24.5%

21.5%

Net income

$

45.0

$

51.8

$

33.6

Diluted earnings per share

$

0.50

$

0.58

$

0.39