Reported on the NASDAQ Global Select Market on June 30, 2007. Such aggregate market value was computed by reference to the closing price of the Common Stock as Stock held by non-affiliates of the registrant was approximately $4.4 billion. Indicate by a check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the ExchangeĪs of June 30, 2007 (the last business day of the registrant's most recently completed second fiscal quarter), the aggregate market value of the voting (Do not check if a smaller reporting company) See the definitions of 'large accelerated filer', 'accelerated filer' and 'smaller reporting company' in Rule 12b-2 of the Exchange Act (Check one): Large accelerated filer ý Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reportingĬompany. Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not beĬontained, to the best of the registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment Indicate by check mark whether the registrant (1) has filed all reports to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934ĭuring the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Securities registered pursuant to Section 12(b) of the Act: Registrant's telephone number, including area code: (610) 373-2400 (Exact name of registrant as specified in its charter) Pennsylvania TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 QuickLinks - Click here to rapidly navigate through this documentĪNNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934įor the fiscal year ended December 31, 2007

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