Prospectus Supplement No. 4
Dated November 1, 2006
to
Prospectus Dated August 3, 2006

 

 

 

 

$100,000,000 OF 3.125% CONVERTIBLE SENIOR SUBORDINATED NOTES DUE 2026
COMMON STOCK ISSUABLE UPON CONVERSION OF THE NOTES

 

This prospectus supplement supplements the prospectus dated August 3, 2006, as supplemented by a prospectus supplement dated August 4, 2006, a prospectus supplement dated September 6, 2006, and a prospectus supplement dated October 4, 2006, relating to the resale by certain of our selling securityholders of up to $100,000,000 aggregate principal amount of our 3.125% Convertible Senior Subordinated Notes due June 1, 2026 (the “Notes”) and the shares of our common stock issuable upon conversion of the Notes. This prospectus supplement should be read in conjunction with, and may not be delivered or utilized without, the prospectus, including amendments or supplements thereto. This prospectus supplement is qualified by reference to the prospectus and the documents and information incorporated by reference therein except to the extent that the information in this prospectus supplement updates or supersedes the information contained or incorporated by reference in the prospectus.

 

 

 

 

This investment involves risks. See section titled “Risk Factors” beginning on page 11 of the prospectus.

 

 

 

 

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

 

 

 

 

 

The date of this prospectus supplement is November 1, 2006.

The section titled “Selling Securityholders” in the prospectus, as previously amended, is superseded in its entirety with the following:

 

SELLING SECURITYHOLDERS

 

We originally issued the Notes to the initial purchaser, Banc of America Securities LLC, in a private placement on May 30, 2006. The Notes were resold by the initial purchaser in the United States to qualified institutional buyers pursuant to Rule 144A under the Securities Act. Selling securityholders, including their transferees, pledgees, donees or successors, may from time to time offer and sell the Notes and the underlying common stock pursuant to this prospectus or any applicable prospectus supplement.

 

The table below sets forth, as of November 1, 2006, the name of each selling securityholder, the principal amount of Notes and number of shares of common stock beneficially owned by each selling securityholder, and the principal amount of Notes and number of shares of common stock issuable upon conversion of those Notes that may be offered from time to time under this prospectus by the selling securityholders named in the table.

 

Because the selling securityholders may offer all or some portion of the Notes or underlying shares of common stock listed below, we have assumed for purposes of this table that the selling securityholders will sell all of the Notes and all of the underlying shares of common stock offered by this prospectus pursuant to this prospectus. See “Plan of Distribution.” In addition, the selling securityholders listed in the table below may have acquired, sold or transferred, in transactions exempt from the registration requirements of the Securities Act, some or all of the Notes since the date on which they provided to us the information presented in the table.

 

We have prepared the table below based on information given to us by those selling securityholders who have supplied us with this information on or prior to November 1, 2006 and we have not sought to verify such information. Based upon information provided to us by the selling securityholders, none of the selling securityholders nor any of their affiliates, officers, directors or principal equity holders has held any position or office or had any other material relationship with us or our affiliates or predecessors within the past three years.

 

 

 

 

To the extent that any of the selling securityholders identified above are broker-dealers, they are deemed to be, under interpretations of the SEC, “underwriters” within the meaning of the Securities Act.

 

With respect to selling securityholders that are affiliates of broker-dealers, we believe that such entities acquired their Notes and underlying common stock in the ordinary course of business and, at the time of the purchase of the Notes and the underlying common stock, such selling securityholders had no agreements or understandings, directly or indirectly, with any person to distribute the Notes or underlying common stock. To the extent that we become aware that such entities did not acquire their Notes or underlying common stock in the ordinary course of business or did have such an agreement or understanding, we will file a post-effective amendment to the registration statement of which this prospectus is a part to designate such affiliate as an “underwriter” within the meaning of the Securities Act.

Only selling securityholders identified above who beneficially own the Notes and the underlying shares of common stock set forth opposite each such selling securityholder’s name in the foregoing table on the effective date of the registration statement of which this prospectus is a part may sell such securities pursuant to the registration statement. Prior to any use of this prospectus in connection with an offering of Notes or underlying shares of common stock by any holder not identified above, the registration statement of which this prospectus is a part will be amended by a post-effective amendment or this prospectus will be supplemented to set forth the name of the selling securityholder, the principal amount of Notes and shares of underlying common stock beneficially owned by the selling securityholder, and the principal amount of Notes and number of shares of common stock issuable upon conversion of those Notes that may be offered from time to time under this prospectus by the selling securityholders intending to the sell such Notes or underlying common stock. The prospectus, as amended or supplemented, will also disclose whether any selling securityholder selling Notes or underlying shares of common stock in connection with such prospectus has held any position or office with, has been employed by or otherwise has had a material relationship with us or our affiliates or predecessors during the three years prior to the date of the prospectus, if such information has not already been disclosed herein.