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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	Insider Title	Director	Officer	Large Shareholder	Other
889232	Ab Investor	Arsenalsgatan 8C S-103 Stockholm V7		No	No	Yes	No
1237710	Ltd Capital Growth Investor	Canada Court Upland Road, St. Peter Port Guernsey, Channel Islands X0 GY1 3BQ		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	Explanation
Common Stock	Disposition	2009-12-31	56,000	$3.21	2,119,714	No	4	S	Indirect	See Footnote
Common Stock	Disposition	2009-12-31	39,200	$3.21	1,483,810	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See Footnote
No	4	S	Direct

Footnotes

39,200 shares of Common Stock, par value $0.001 (the "Common Stock"), were sold by Investor Growth Capital Limited and 16,800 shares of Common Stock were sold by Investor Group, L.P. The shares of Common Stock reported in Column 5 are held directly by Investor Growth Capital Limited and Investor Group, L.P. Investor Growth Capital Limited is an indirect wholly-owned subsidiary of Investor AB. Investor Group, L.P. is a limited partnership of which Investor AB is the indirect general partner. Investor AB may be deemed to beneficially own the securities held by Investor Growth Capital Limited and Investor Group, L.P. Investor AB disclaims beneficial ownership of such securities except to the extent of its pecuniary interest in such securities.
These shares of Common Stock were sold by Investor Growth Capital Limited.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.13 to $3.24. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.