MICROSEMI CORPORATION

Summary of Schedule Reconciling Selected Non-GAAP Financial Measures

to Comparable GAAP Financial Measures

(unaudited, in millions, except for per share amounts)

Quarter Ended December 30, 2012

GAAP

Non-GAAP Adjustments

Non-GAAP

Net sales

$

247.6

$

—

$

247.6

Gross profit

$

142.6

$

—

$

142.6

Operating expense

$

117.1

$

(31.2)

$

85.9

Operating income

$

25.5

$

31.2

$

56.7

Interest and other expense, net

$

(8.3)

$

—

$

(8.3)

Income before income taxes

$

17.2

$

31.1

$

48.3

Provision for income taxes

$

3.0

$

0.4

$

3.4

Net income

$

14.2

$

30.8

$

45.0

Diluted earnings per share

$

0.16

$

0.34

$

0.50