REPLIGEN CORP — Director's Dealing 2011

Dec 19, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2011-12-15

Reporting Person: Henry Earl Webb (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-12-15	Common Stock (Right to Buy)	$3.22	A	15000	Acquired	2021-12-15	Common Stock (15000)	Direct

Footnotes

F1: Award represents Annual Board Options issued to each non-employee director. Award vests in full one year from grant date on December 15,2012.