FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   PFIZER INC 2. Date of Event Requiring Statement (Month/Day/Year) 01/29/2014 3. Issuer Name and Ticker or Trading Symbol Celladon Corp [CLDN] (Last) (First) (Middle) 235 E. 42ND STREET 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) NEW YORK, NY 10017 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A-1 Convertible Preferred Stock	  (1)	  (1)	Common Stock	1,544,397 (2)	$ 0 (1)	D	Â
Convertible Promissory Notes	  (3)	  (3)	Common Stock	$ 181,818.18	$ (3)	D	Â
Series A-1 Preferred Warrants	10/15/2013	10/15/2018	Series A-1 Preferred Stock	532,818 (4)	$ 0.449 (4)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PFIZER INC 235 E. 42ND STREET NEW YORK, NY 10017	Â	  X	Â	Â

Signatures

/s/ Susan Grant, Assistant Secretary on behalf of Pfizer Inc.		01/29/2014
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The shares of Series A-1 Preferred Stock have no expiration date and are convertible at any time at the election of the holder. Each share of Series A-1 Preferred Stock will automatically convert on a one-for-one basis into shares of common stock upon the closing of the Issuer's initial public offering.
(2)	Share numbers assume or give effect to the 1-for-12.49 reverse stock split of the Issuer's Common Stock effected on October 25, 2013, which will be effective for the Preferred Stock upon its conversion to Common Stock immediately prior to the closing of the Issuer's initial public offering.
(3)	Consists of principal, that together with accrued interest, will convert immediately prior to the closing of the Issuer's initial public offering into shares of Common Stock at a conversion price equal to the public offering price of the Common Stock sold in the Issuer's initial public offering.
(4)	Share numbers and exercise price do not give effect to the 1-for-12.49 reverse stock split of the Issuer's Common Stock effected on October 25, 2013, which will be effective for the Preferred Stock upon its conversion to Common Stock immediately prior to the closing of the Issuer's initial public offering

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