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Filing Details

Accession Number:: 0001144204-13-055367
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2013-10-16 09:35:17
Reporting Period:: 2013-10-14

Filing Date:: 2013-10-16
Accepted Time:: 2013-10-16 09:35:17
SEC Url:: Form 4 Filing

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	Yes
1346824	Ra Capital Management, Llc	C/O Ra Capital Management, Llc 20 Park Plaza, Suite 1200 Boston MA 02116	No	No	Yes	Yes
1384859	Peter Kolchinsky	C/O Ra Capital Management, Llc 20 Park Plaza, Suite 1200 Boston MA 02116	No	No	Yes	Yes

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	81,200	$2.76	16,986,971	No	4	P	Indirect	See Footnotes
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	13,200	$2.77	17,000,171	No	4	P	Indirect	See Footnotes
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	475,699	$2.77	17,475,870	No	4	P	Indirect	See Footnotes
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	230,100	$2.78	17,705,970	No	4	P	Indirect	See Footnotes
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	950,000	$2.79	18,655,970	No	4	P	Indirect	See Footnotes
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	206,000	$2.80	18,861,970	No	4	P	Indirect	See Footnotes
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	369,900	$2.84	19,231,870	No	4	P	Indirect	See Footnotes
Common Stock, $0.001 Par Value	Acquisiton	2013-10-14	43,130	$2.85	19,275,000	No	4	P	Indirect	See Footnotes

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

Footnotes

The securities purchased include 63,743 shares for RA Capital Healthcare Fund, L.P. (the "Fund") and 17,457 shares for an account owned by Blackwell Partners, LLC (the "Blackwell Account").
The securities purchased include 10,363 shares for the Fund and 2,837 shares for the Blackwell Account.
The securities purchased include 373,424 shares for the Fund and 102,275 shares for the Blackwell Account.
The securities purchased include 180,633 shares for the Fund and 49,467 shares for the Blackwell Account.
The securities purchased include 745,752 shares for the Fund and 204,248 shares for the Blackwell Account.
The securities purchased include 161,713 shares for the Fund and 44,287 shares for the Blackwell Account.
The securities purchased include 290,373 shares for the Fund and 79,527 shares for the Blackwell Account.
The securities purchased include 33,844 shares for the Fund and 9,286 shares for the Blackwell Account.
Following the transactions set forth on Table I above, 14,899,145 shares are held by the Fund, and 4,375,855 shares are held in the Blackwell Account.
RA Capital Management, LLC (the "Adviser") is the general partner of the Fund and the investment adviser of the Blackwell Account. Peter Kolchinsky is the sole manager of the Adviser. In their respective capacities, each of Mr. Kolchinsky and the Adviser may be deemed to beneficially own the reported securities.
Pursuant to Rule 16a-1 under the Securities Exchange Act of 1934, as amended (the "Act"), each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of their respective pecuniary interests therein. The filing of this Form 4 shall not be construed as an admission that Mr. Kolchinsky or the Adviser is or was for the purposes of Section 16(a) of the Act, or otherwise, the beneficial owner of any of securities reported herein.