2015 SECOND QUARTER OUTLOOK

RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN

(Unaudited)

Three Months Ending

June 30, 2015

Low

High

Gross margin

53.7%

54.7%

Adjustments to reconcile gross margin to non-GAAP gross margin:

    Stock-based compensation expense 

0.3%

0.3%

    Amortization of acquisition-related intangible assets

0.5%

0.5%

Non-GAAP gross margin

54.5%

55.5%

RECONCILIATION OF R&D AND SG&A EXPENSES TO NON-GAAP R&D AND SG&A EXPENSES

(Unaudited, in thousands)

Three Months Ending

June 30, 2015

Low

High

R&D and SG&A expenses

$       32,600

$         34,600

Adjustments to reconcile R&D and SG&A expenses to non-GAAP R&D and SG&A expenses:

    Stock-based compensation expense

(8,300)

(9,300)

Non-GAAP R&D and SG&A expenses

$       24,300

$         25,300