CLDN Eiger Biopharmaceuticals Com

CUSIP No.
15117E 10 7
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1) Names of Reporting Persons. PFIZER INC.
I.R.S. Identification Nos. of Above Persons (entities only) 13-5315170
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2) Check the Appropriate Box if a Member of a Group (See Instructions)
(a) |_|
(b) |_|
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3) SEC Use Only
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4) Citizenship or Place of Organization
Delaware
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9) Aggregate Amount Beneficially Owned by Each Reporting Person 1,828,495
10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares
(See Instructions) |_|
11) Percent of Class Represented by Amount in Item 9  7.65%
12) Type of Reporting Person (See Instructions)   CO
 
ITEM 1.
(A) NAME OF ISSUER: Celladon Corporation
(B) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICE:
12707 High Bluff Drive, Suite 200, San Diego, CA 92130
ITEM 2.
(A) NAME OF PERSONS FILING: PFIZER INC.
(B) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR IF NONE, RESIDENCE:
235 E. 42nd Street, New York, NY 10017
(C) CITIZENSHIP: DELAWARE, U.S.A.
(D) TITLE OF CLASS OF SECURITIES: COMMON STOCK
(E) CUSIP NUMBER:  15117E 10 7
ITEM 3.
Not applicable.
ITEM 4. OWNERSHIP.
(a) Amount beneficially owned: 1,828,495
(b) Percent of class: 7.65%
(c) Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote: 1,828,495
(ii) Shared power to vote or to direct the vote: 0
(iii) Sole power to dispose or to direct the disposition of:  1,828,495
(iv) Shared power to dispose or to direct the disposition of:    0

The ownership percentage of the Reporting Person set forth in Row 11 of the cover page hereto has been calculated based on an assumed total of 23,916,021 shares of Common Stock outstanding as of October 31, 2015, as reported in the Issuer’s Form 10-Q filed with the Securities and Exchange Commission on November 9, 2015.

ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS
Not applicable.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON
Not applicable.
ITEM 7.  IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY
Not applicable.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP
Not applicable.
ITEM 10. CERTIFICATION.

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.

  Signature

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.

Dated: February 11, 2016

PFIZER INC.

By: /s/ Susan Grant
Name: Susan Grant
Title: Assistant Secretary