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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1481512	Ra Pharmaceuticals Inc.	RARX	Pharmaceutical Preparations (2834)	262908274

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1619841	M. Rajeev Shah	C/O Ra Capital Management, Llc 20 Park Plaza, Suite 1200 Boston MA 02116		Yes	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2018-02-14	2,500,000	$6.00	3,851,808	No	4	P	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See footnote

Footnotes

These securities include 2,023,134 shares held by RA Capital Healthcare Fund, L.P. (the "Fund") and 476,866 shares held in an account owned by a separately managed account (the "Account").
Represents 3,135,084 shares of Common Stock held by the Fund and 716,724 shares of Common Stock held in the Account.
RA Capital Management, LLC (the "Adviser") is the general partner of the Fund and the investment adviser of the Account. Peter Kolchinsky is the sole manager of the Adviser, and Mr. Shah is a managing director of the Adviser. Mr. Shah has no pecuniary interest in the reported securities held in the Account and therefore disclaims beneficial ownership of those securities. Mr. Shah disclaims beneficial ownership of the reported securities held by the Fund except to the extent of his pecuniary interest therein.