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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1396814	Pacira Pharmaceuticals Inc.	PCRX	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1134657	Luke Evnin	C/O Mpm Asset Management 200 Clarendon Street, 54Th Floor 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	2011-11-21	461,538	$6.50	3,290,479	No	4	P	Indirect	See footnote

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

Footnotes

The shares were purchased as follows: 432,573 by MPM BioVentures IV-QP, L.P. ("BV IV QP"), 16,665 by MPM BioVentures IV GmbH & Co. Beteiligungs KG ("BV IV KG") and 12,300 by MPM Asset Management Investors BV4 LLC ("AM BV4"). MPM BioVentures IV GP LLC and MPM BioVentures IV LLC ("BV LLC") are the direct and indirect general partners of BV IV QP and BV IV KG and BV LLC is the manager of AM BV4. Vaughn M. Kailian, Ansbert Gadicke, Luke Evnin, Steven St. Peter, James Paul Scopa, Todd Foley and John Vander Vort are the members of BV LLC.
The shares are held as follows: 3,083,973 by BV IV QP, 118,812 by BV IV KG and 87,694 by AM BV4. The Reporting Person disclaims beneficial ownership of the securities except to the extent of his pecuniary interest therein.