SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Under the Securities Exchange Act of 1934*
|Merrimack Pharmaceuticals, Inc|
(Name of Issuer)
|COMMON STOCK, $ 0.01 PAR VALUE|
(Title of Class of Securities)
|March 29, 2012|
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
¨ Rule 13d-1 (b)
x Rule 13d-1 (c)
¨ Rule 13d-1 (d)
|*||The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.|
The information required in the remainder of this cover page shall not be deemed to be filed for the purpose of Section 18 of the Securities Exchange Act of 1934 (Act) or otherwise to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).
(Continued on following pages)
|CUSIP NO. 590328100|
NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)
(a) ¨ (b) ¨
SEC USE ONLY
CITIZENSHIP OR PLACE OF ORGANIZATION
The Republic of France
SOLE VOTING POWER
SHARED VOTING POWER
SOLE DISPOSITIVE POWER
SHARED DISPOSITIVE POWER
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
TYPE OF REPORTING PERSON (see instructions)
|Item 1(a).||Name of Issuer:|
Merrimack Pharmaceuticals, Inc.
|Item 1(b).||Address of Issuers Principal Executive Offices:|
One Kendall Square, Suite B7201, Cambridge, Massachusetts 02139
|Item 2(a).||Name of Person Filing:|
|Item 2(b).||Address of Principal Business Office, or if none, Residence:|
54, rue La Boétie, 75008 Paris, France
The Republic of France
|Item 2(d).||Title of Class of Securities:|
COMMON STOCK, $ 0.01 PAR VALUE
|Item 2(e).||CUSIP Number:|
|Item 3.||Item 3 is not applicable.|
|Item 4(a).||Amount Beneficially Owned:|
|Item 4(b).||Percent of Class:|
|Item 4(c).||Number of shares as to which such person has:|
(i) Sole power to vote or to direct the vote:
(ii) Shared power to vote or to direct the vote:
(iii) Sole power to dispose or to direct the disposition of:
(iv) Shared power to dispose or to direct the disposition of:
|Item 5.||Ownership of Five Percent or Less of a Class:|
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ¨.
|Item 6.||Ownership of More than Five Percent on Behalf of Another Person:|
Item 6 is not applicable.
|Item 7.||Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company:|
Item 7 is not applicable.
|Item 8.||Identification and Classification of Members of a Group:|
Item 8 is not applicable.
|Item 9.||Notice of Dissolution of Group:|
Item 9 is not applicable.
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
|Date: April 2, 2012||By:|
|Associate Vice President|
|Corporate Law, Financial & Securities Law|