EX-99.1

                                                                    Exhibit 99.1
                                                                    ------------

                               Continuation Sheet
                                     Form 4
                             Statement of Changes in
                              Beneficial Ownership


(1)      The stockholder is Warburg Pincus Ventures, L.P. ("Ventures").
         Following the distribution Ventures beneficially owns 10,672 shares of
         common stock ("Common Stock") of Kyphon Inc. (the "Issuer"). The sole
         general partner of Ventures is Warburg Pincus Partners LLC, a New York
         limited liability company ("WPP LLC") and a subsidiary of Warburg
         Pincus & Co., a New York general partnership ("WP"). Warburg Pincus LLC
         (formerly E.M. Warburg Pincus & Co., LLC), a New York limited liability
         company ("WP LLC"), manages Ventures. By reason of the provisions of
         Rule 16a-1 of the Exchange Act, WPP LLC, WP and WP LLC may be deemed to
         be the beneficial owners of the Common Stock held by Ventures, although
         WPP LLC, WP and WP LLC disclaim beneficial ownership of the Common
         Stock except to the extent of any indirect pecuniary interest therein.
         Ms. Weatherman, a director of the Issuer, is a general partner of WP
         and a member of WP LLC. As such, Ms. Weatherman may be deemed to have
         an indirect pecuniary interest (within the meaning of Rule 16a-1 of the
         Exchange Act) in an indeterminate portion of the shares beneficially
         owned by Ventures, WP LLC, WP and WPP LLC. Ms. Weatherman disclaims
         beneficial ownership of such shares except to the extent of any
         indirect pecuniary interest therein. Ms. Weatherman does not directly
         own any shares of common stock of the Issuer.

(2)      On July 29, 2005, Ventures distributed an aggregate of 3,520,656 shares
         of Common Stock to its partners.

(3)      Price not applicable.

EX-24

                                                                      Exhibit 24
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                                POWER OF ATTORNEY





     The undersigned hereby constitutes and appoints each of Scott A. Arenare,
Timothy J. Curt, and Steven G. Schneider, acting together or individually,
his/her true and lawful attorney-in-fact to:

(1)  execute for and on behalf of the undersigned Forms 3, 4, and 5,
     together with any amendments thereto, in accordance with the Securities
     Exchange Act of 1934, as amended, and the rules thereunder;

(2)  do and perform any and all acts for and on behalf of the undersigned
     which may be necessary or desirable to complete the execution of any
     such Forms and the filing thereof with the United States Securities and
     Exchange Commission and any other person as may be required by law; and

(3)  take any other action of any type whatsoever in connection with the
     foregoing which, in the opinion of such attorney-in-fact, may be of
     benefit to, in the best interest of, or legally required by, the
     undersigned, it being understood that the documents executed by such
     attorney-in-fact on behalf of the undersigned pursuant to this power of
     attorney shall be in such form and shall contain such terms and
     conditions as such attorney-in-fact may approve in his discretion.


     The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform all and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and powers
herein granted, with full power of substitution or revocation, hereby ratifying
and confirming all that such attorney-in-fact, or his substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney and
the rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned's responsibilities to
comply with the Securities Exchange Act of 1934, as amended.


     This Power of Attorney shall remain in full force and effect until revoked
in writing by the undersigned or his/her attorney-in-fact.


     IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
this 15th day of May, 2004.





                                       Signature: /s/ Elizabeth H. Weatherman
                                                 -------------------------------

                                       Print Name: Elizabeth H. Weatherman