REPLIGEN CORP — Director's Dealing 2012

Mar 12, 2012

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2012-03-12

Reporting Person: Spurr Robert (Chief Commercial. Officer)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	10000	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (Right to Purchase)	$3.38	2021-08-08	Common Stock (100000)		Direct

Footnotes

F1: 20,000 shares exercisable at each of the following dates: 8/8/2012, 8/8/2013, 8/8/2014, 8/8/2015, 8/8/2015.