Unassociated Document
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 

 
FORM 25

NOTIFICATION OF REMOVAL FROM LISTING AND/OR
REGISTRATION UNDER SECTION 12(b) OF THE
SECURITIES EXCHANGE ACT OF 1934.

                                    Commission File Number 1-15096

Merck Serono S.A.,     The New York Stock Exchange
_____________________________________________________________________________________________________________
(Exact name of Issuer as specified in its charter, and name of Exchange where security is listed and/or registered)

9, Chemin des Mines, Case Postal 54, CH-1202 Geneva, Switzerland Telephone +41-22-414-3000
_____________________________________________________________________________________________________________
(Address, including zip code, and telephone number, including area code, of Issuer’s principal executive offices)

Bearer Shares, nominal value CHF 25 per share
American Depositary Shares (as evidenced by American Depositary Receipts), each representing one fortieth of a Bearer Share
_____________________________________________________________________________________________________________
(Description of class of securities)

Please place an X in the box to designate the rule provision relied upon to strike the class of securities from listing and registration:

o  17 CFR 240.12d2-2(a)(1)

o  17 CFR 240.12d2-2(a)(2)

o  17 CFR 240.12d2-2(a)(3)

o  17 CFR 240.12d2-2(a)(4)


o    Pursuant to 17 CFR 240.12d2-2(b), the Exchange has complied with its rules to strike the class of securities from listing and/or withdraw registration on the Exchange.

x    Pursuant to 17 CFR 240.12d2-2(c), the Issuer has complied with the rules of the Exchange and the requirements of 17 CFR 240.12d2-2(c) governing the voluntary withdrawal of the class of securities from listing and registration on the Exchange.


Pursuant to the requirements of the Securities Exchange Act of 1934, Merck Serono S.A. certifies that it has reasonable grounds to believe that it meets all of the requirements for filing the Form 25 and has caused this notification to be signed on its behalf by the undersigned duly authorized person.

 
April 16, 2007        By /s/ Francois Naef                        Chief Administrative Officer
       Date               Name                      Title