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
                                                                                  
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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 *

Farzaneh-Far Ramin		 2. Issuer Name and Ticker or Trading Symbol

Ra Pharmaceuticals, Inc. [ RARX ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chief Medical Officer
(Last)          (First)          (Middle)

C/O RA PHARMACEUTICALS, INC., 87 CAMBRIDGEPARK DRIVE		 3. Date of Earliest Transaction (MM/DD/YYYY)

10/15/2019
(Street)

CAMBRIDGE, MA 02140
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

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

_X _ Form filed by One Reporting Person
___ 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  10/15/2019    M    1389  A $5.60  8521  D   
COMMON STOCK  10/15/2019    M    9206  A $5.60  17727  D   
COMMON STOCK  10/15/2019    S(1)    10595  D $46.8871 (2) 7132  D   

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
Stock Options (Right to buy)  $5.60  10/15/2019    M        1389    (3) 8/16/2026  Common Stock  1389  $0  18055  D   
Stock Options (Right to buy)  $5.60  10/15/2019    M        9206    (4) 8/16/2026  Common Stock  9206  $0  119684  D   

Explanation of Responses:
(1)  The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 16, 2019.
(2)  The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $46.78 to $46.95. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
(3)  These stock options vest over a four (4) year period in 48 equal monthly installments at the end of each month following August 16, 2016.
(4)  These stock options vest a four (4) year period with the first twenty five percent (25%) of such shares vesting on the first anniversary of July 11, 2016, and the remaining shares vesting in equal monthly installments at the end of each month following the first anniversary of July 11, 2016 over the following thirty six (36) months, subject to the terms set forth in the applicable equity agreement.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Farzaneh-Far Ramin
C/O RA PHARMACEUTICALS, INC.
87 CAMBRIDGEPARK DRIVE
CAMBRIDGE, MA 02140

Chief Medical Officer

Signatures
/s/ David Lubner, Attorney-in-Fact for Ramin Farzaneh-Far 10/17/2019
**Signature of Reporting Person Date


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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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