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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1070336	Achillion Pharmaceuticals Inc	ACHN	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1315082	Ra Capital Healthcare Fund Lp	C/O Ra Capital Management, Llc 20 Park Plaza, Suite 1200 Boston MA 02116	No	No	Yes	No
1346824	Ra Capital Management, Llc	C/O Ra Capital Management, Llc 20 Park Plaza, Suite 1200 Boston MA 02116	No	No	No	Yes
1384859	Peter Kolchinsky	C/O Ra Capital Management, Llc 20 Park Plaza, Suite 1200 Boston MA 02116	No	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
Common Stock, $0.001 Par Value	Disposition	2013-09-16	91,801	$7.53	4,867,617	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-17	77,600	$7.42	4,959,418	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-18	2,328	$7.48	5,037,018	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-20	26,539	$7.40	5,039,346	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-23	5,665	$7.42	5,065,885	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-23	27,783	$7.42	5,071,550	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-24	77,600	$7.30	5,099,333	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-24	4,424	$7.33	5,176,933	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-24	49,354	$7.35	5,181,357	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-24	50,051	$7.38	5,230,711	No	4	S	Direct
Common Stock, $0.001 Par Value	Disposition	2013-09-25	135,800	$7.26	5,280,762	No	4	S	Direct
Common Stock, $0.001 Par Value	Acquisiton	2013-09-27	200,000	$4.00	5,416,562	No	4	P	Direct
Common Stock, $0.001 Par Value	Acquisiton	2013-09-27	400,000	$4.00	5,216,562	No	4	P	Direct
Common Stock, $0.001 Par Value	Acquisiton	2013-09-30	1,552,000	$3.50	4,816,562	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct

Footnotes

The reported securities are owned by RA Capital Healthcare Fund, L.P. (the "Fund"). RA Capital Management, LLC (the "Adviser") is the general partner of the Fund, and Peter Kolchinsky is the sole manager of the Adviser. The Adviser and Mr. Kolchinsky disclaim beneficial ownership of the reported securities in reliance on Rule 16a-1(a)(1)(v) and (vii), respectively, and therefore disclaim any obligation to report ownership of the reported securities other than on behalf of the Fund. The filing of this Form 4 shall not be construed as an admission that either the Adviser or Mr. Kolchinsky is or was, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the beneficial owner of any of the securities reported herein. The number of shares reported in Column 5 of Table I and the number of options reported in Column 9 of Table II reflect the number of shares or options, as applicable, beneficially owned by the Fund as of the filing date of this Form 4.
On July 15, 2013, the Fund became a beneficial owner of more than ten percent of the outstanding shares the issuer's common stock and therefore became subject to Section 16 of the Securities Exchange Act of 1934. On September 23, 2014, the Fund ceased to be a beneficial owner of more than ten percent of the outstanding shares the issuer's common stock and ceased to be subject to Section 16.