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

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1. Name and Address of Reporting Person * F2 Bioscience III, L.P.   2. Issuer Name and Ticker or Trading Symbol Radius Health, Inc. [RDUS] 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) UGLAND HOUSE, SOUTH CHURCH STREET, PO BOX 309 3. Date of Earliest Transaction (Month/Day/Year) 01/08/2015 (Street) GEORGE TOWN, E9 KY1-1104 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 01/08/2015   J   389,331 (1) D (1) 1,167,997 D (2)

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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

Common Stock Warrant

$ 2.694

01/08/2015

J

89,261 (1)

04/23/2013

04/23/2018

Common Stock

89,261 (1)

$ 0

267,786

D (2)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
F2 Bioscience III, L.P. UGLAND HOUSE, SOUTH CHURCH STREET PO BOX 309 GEORGE TOWN, E9 KY1-1104		X
F2 Bioscience GP Ltd. UGLAND HOUSE, SOUTH CHURCH STREET PO BOX 309 GEORGE TOWN, E9 KY1-1104		X
F2 Capital Ltd PO BOX 3175 ROAD TOWN TORTOLA, D8 VG 1110		X
Priestley Katherine UGLAND HOUSE, SOUTH CHURCH STREET PO BOX 309 GEORGE TOWN, E9 KY1-1104		X

Signatures

/s/ Morag Law, attorney-in-fact for F2 Bioscience III, L.P.		01/12/2015
**Signature of Reporting Person		Date
/s/ Morag Law, attorney-in-fact for F2 Bioscience GP Ltd.		01/12/2015
**Signature of Reporting Person		Date
/s/ Morag Law, attorney-in-fact for F2 Capital Limited		01/12/2015
**Signature of Reporting Person		Date
/s/ Morag Law, attorney-in-fact for Katherine Priestley		01/12/2015
**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)	Reflects a distribution by the Reporting Person to a limited partner pursuant to a discretionary election.
(2)	The reported securities are owned directly by F2 Bioscience III, L.P. ("F2"). Each of F2 Biosciences GP Ltd. ("F2 GP"), Katherine Priestley and F2 Capital Limited ("F2 Capital") are indirect beneficial owners of the reported securities. F2 GP is the General Partner of F2 and Katherine Priestley is a member of F2 GP. F2 Capital is an investment adviser to F2. Each of the reporting persons disclaims beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

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