REPLIGEN CORP — Director's Dealing 2012

Oct 2, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2012-09-27

Reporting Person: RUSCHE JAMES R (Senior Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-27	Common Stock	S	2053	$5.90	Disposed	157068	Direct
2012-09-27	Common Stock	S	1138	$5.91	Disposed	155930	Direct
2012-09-27	Common Stock	S	100	$5.92	Disposed	155830	Direct
2012-09-27	Common Stock	S	476	$5.93	Disposed	155354	Direct
2012-09-27	Common Stock	S	100	$6.00	Disposed	155254	Direct
2012-09-27	Common Stock	S	1133	$6.09	Disposed	154121	Direct

Footnotes

F1: The shares sold were previously held in a trust for Mr. Rusche's daughter.