FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * New Leaf Ventures I, L.P.   2. Issuer Name and Ticker or Trading Symbol CONCERT PHARMACEUTICALS, INC. [CNCE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O NEW LEAF VENTURES, TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 3. Date of Earliest Transaction (Month/Day/Year) 02/19/2014 (Street) NEW YORK, NY 10036 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/19/2014   C   78,315 (1) A (1) 93,606 D (2)   Common Stock 02/19/2014   C   13,721 (1) A (1) 107,327 D (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Series B Preferred Stock

$ 0

02/19/2014

C

442,478

(1)

(1)

Common Stock

78,315

$ 0

0

D (2)

Series C Preferred Stock

$ 0

02/19/2014

C

77,522

(1)

(1)

Common Stock

13,721

$ 0

0

D (2)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
New Leaf Ventures I, L.P. C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK, NY 10036		X
New Leaf Venture Management I, L.P. C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK, NY 10036		X
New Leaf Venture Management I, L.L.C. C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK, NY 10036		X
Chambon Philippe O. C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK, NY 10036		X
NIEDEL JAMES C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK, NY 10036		X
HUNT RONALD C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK, NY 10036		X
Lathi Vijay K C/O NEW LEAF VENTURES 1200 PARK PLACE, SUITE 300 SAN MATEO, CA 94043		X
Delagardelle Jeani C/O NEW LEAF VENTURES 1200 PARK PLACE, SUITE 300 SAN MATEO, CA 94043		X
Ratcliffe Liam C/O NEW LEAF VENTURES TIMES SQUARE TOWER, 7 TIMES SQ, STE 3502 NEW YORK, NY 10036		X

Signatures

/s/ Craig L. Slutzkin, Chief Financial Officer of New Leaf Venture Management I, L.L.C., the sole general partner of New Leaf Venture Management I, L.P., the sole general partner of New Leaf Ventures I, L.P.		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, Chief Financial Officer of New Leaf Venture Management I, L.L.C., the sole general partner of New Leaf Venture Management I, L.P.		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, Chief Financial Officer of New Leaf Venture Management I, L.L.C.		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, as Attorney-in-Fact for Philippe O. Chambon		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, as Attorney-in-Fact for James Niedel		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, as Attorney-in-Fact for Ronald Hunt		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, as Attorney-in-Fact for Vijay Lathi		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, as Attorney-in-Fact for Jeani Delagardelle		02/21/2014
**Signature of Reporting Person		Date
/s/ Craig L. Slutzkin, as Attorney-in-Fact for Liam Ratcliffe		02/21/2014
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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 automatically converted into Common Stock on a 1-for-5.65 basis upon the closing of the Issuer's initial public offering without payment of further consideration and had no expiration date.
(2)	Represents shares directly beneficially owned by New Leaf Ventures I, L.P. ("NLV I"). New Leaf Venture Management I, L.P. ("NLV Venture Management I") is the general partner of NLV I and New Leaf Venture Management I, L.L.C. ("NLV Management I") is the general partner of NLV Venture Managemen I. Philippe O. Chambon, Jeani Delagardelle, Ronald Hunt, Vijay Lathi, James Niedel and Liam Ratcliffe are the individual managers of NLV Management I (the "Individual Managers"). NLV Venture Managemen I and NLV Management I disclaim beneficial ownership of such shares, except to the extent of their pecuniary interest therein. As one of six individual managers, each of the Individual Managers disclaims beneficial ownership over the shares reported herein, and in all events disclaims pecuniary interest except to the extent of his economic interest.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.