Pricing Term Sheet

Dated June 12, 2013

Ticker / Exchange for

Common Stock:

Aggregate Principal Amount

Offered:

NASDAQ Last Reported Sale

Price on June 12, 2013:

Joint Book-Running

Managers:

J.P. Morgan Securities LLC

Barclays Capital Inc.

Wells Fargo Securities, LLC

Adjustment to Conversion

Rate Upon a Make-Whole

Fundamental Change:

The following table sets forth the number of additional shares of the Issuer’s common stock, if any, to be added to the conversion rate per $1,000 principal amount of Notes for conversions in connection with a “make-whole fundamental change” (as defined in the Preliminary Prospectus Supplement):

Effective date

June 18, 2013

July 1, 2014

July 1, 2015

July 1, 2016

July 1, 2017

July 1, 2018

If the stock price is between two stock prices in the table above or the effective date is between two effective dates in the table above, the number of additional shares will be determined by a straight-line interpolation between the number of additional shares set forth for the higher and lower stock prices and the earlier and later effective dates based on a 365-day year, as applicable.

If the stock price is greater than $125.00 per share (subject to adjustment in the same manner as the stock prices set forth in the column headings of the table above, as described in the Preliminary Prospectus Supplement), no additional shares will be added to the conversion rate.

If the stock price is less than $15.37 per share (subject to adjustment in the same manner as the stock prices set forth in the column headings of the table above, as described in the Preliminary Prospectus Supplement), no additional shares will be added to the conversion rate.

Additional Tax Disclosure:

The notes will be issued with original issue discount (“OID”) for U.S. federal income tax purposes. Accordingly, a U.S. Holder will be required to accrue the entire amount of OID in income over the life of the notes as described below.

OID is the excess of a note’s stated redemption price at maturity over its issue price. The stated redemption price at maturity of a note is the sum of all payments to be made on the note other than the “qualified stated interest.” “Qualified stated interest” will include the stated interest payments on the notes.

A U.S Holder will be required to include OID on the notes in income for U.S. federal income tax purposes as it accrues on a constant yield to maturity basis, regardless of such holder’s regular method of accounting for U.S. federal income tax purposes, before the receipt of payments attributable to this income. Under this method, U.S. Holders will be required to include in income increasingly greater amounts of OID in successive accrual periods. A U.S. Holder will not recognize any additional income upon the receipt of any cash attributable to OID on the notes.

A U.S. Holder’s adjusted tax basis in a note generally will be the U.S. Holder’s cost therefor increased by any OID previously included in income by such U.S. Holder with respect to the note.

For purposes of the discussions in the Preliminary Prospectus Supplement under the headings “Material U.S. federal income tax considerations—U.S. Holders—Information reporting and backup withholding” and “Material U.S. federal income tax considerations—Non-U.S. Holders,” references to interest should be read to include accrued OID.

Additional Risk Factor:

If a bankruptcy petition were filed by or against the Issuer, holders of the Notes may receive a lesser amount for their claim than they would have been entitled to receive under the indenture governing the Notes.

If a bankruptcy petition were filed by or against the Issuer under the United States Bankruptcy Code after the issuance of the Notes, the claim by any holder of the Notes for the principal amount of the Notes may be limited to an amount equal to the sum of:

•       the original issue price for the Notes; and

•       that portion of any OID that does not constitute “unmatured interest” for purposes of the United States Bankruptcy Code.

Any OID that was not amortized as of the date of the bankruptcy filing would constitute unmatured interest. Accordingly, holders of the Notes under these circumstances may receive a lesser amount than they would be entitled to under the terms of the indenture governing the Notes, even if sufficient funds are available.