FORM 4
[ X ] 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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

GALAKATOS NICHOLAS 		2. Issuer Name and Ticker or Trading Symbol

Radius Health, Inc. [ RDUS ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
_____ Officer (give title below)      __ X __ Other (specify below)
Former 10% stockholder
(Last)          (First)          (Middle)

C/O MPM ASSET MANAGEMENT, 200 CLARENDON STREET, 54TH FLOOR 		3. Date of Earliest Transaction (MM/DD/YYYY)

9/27/2016
(Street)

BOSTON, MA 02116
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   9/27/2016     J (1)    1229902   (2) D $0.00   (1) 2459804   (3) I   See footnote   (4)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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

Explanation of Responses:
( 1)  Represents a pro-rata in-kind distribution of Common Stock of the Issuer by the reporting persons, without consideration to their respective limited partners and members.
( 2)  The shares were distributed as follows: 1,023,819 shares by MPM Bioventures III-QP, L.P. ("BV III QP"), 68,835 shares by MPM BioVentures III, L.P ("BV III"), 19,815 shares by MPM Asset Management Investors 2003 BVIII LLC ("AM 2003"), 30,911 shares by MPM BioVentures III Parallel Fund, L.P. ("BV Parallel") and 86,522 shares by MPM BioVentures III GmbH & Co. Beteiligungs KG ("BV KG").
( 3)  The shares are held as follows: 2,047,635 shares by BV III QP, 137,671 shares by BV III, 39,630 shares by AM 2003, 61,823 shares by BV Parallel and 173,045 shares by BV KG.
( 4)  MPM BioVentures III GP, L.P. ("MPM III GP") and MPM BioVentures III LLC ("MPM III LLC") are the direct and indirect general partners of BV III QP, BV III, BV Parallel and BV KG. Luke Evnin, Ansbert Gadicke, Nicholas Galakatos, Dennis Henner, Nicholas Simon III, Michael Steinmetz and Kurt Wheeler are members of MPM III LLC and AM 2003. Each reporting person disclaims beneficial ownership of the securities reported herein except to the extent of his or its respective pecuniary interest therein.

Remarks:
See Form 4 for MPM BioVentures III LLC filed simultaneously herewith for additional members of this joint filing.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
GALAKATOS NICHOLAS
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116


Former 10% stockholder
SIMON NICHOLAS J III
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116


Former 10% stockholder
WHEELER KURT
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116


Former 10% stockholder

Signatures
/s/ Nicholas Galakatos 9/29/2016
** Signature of Reporting Person Date

/s/ Nicholas Simon 9/29/2016
** Signature of Reporting Person Date

/s/ Kurt Wheeler 9/29/2016
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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.
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