REPLIGEN CORP — Director's Dealing 2014

Jun 9, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2014-06-05

Reporting Person: RYAN THOMAS F JR (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-06-05	Common Stock	M	20000	$4.29	Acquired	70312	Direct
2014-06-05	Common Stock	S	20000	$20.5575	Disposed	50312	Direct
2014-06-05	Common Stock	M	20000	$5.08	Acquired	70312	Direct
2014-06-05	Common Stock	S	20000	$20.5575	Disposed	50312	Direct
2014-06-05	Common Stock	M	5000	$4.96	Acquired	55312	Direct
2014-06-05	Common Stock	S	5000	$20.5575	Disposed	50312	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-06-05	Stock Option (Right to Buy)	$4.29	M	20000	Disposed	2017-09-14	Common Stock (20000)	Direct
2014-06-05	Stock Option (Right to Buy)	$5.08	M	20000	Disposed	2018-09-12	Common Stock (20000)	Direct
2014-06-05	Stock Option (Right to Buy)	$4.96	M	5000	Disposed	2019-09-11	Common Stock (5000)	Direct

Footnotes

F1: $20.5575 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.31 to $21.01, inclusive. 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 range.