REPLIGEN CORP — Director's Dealing 2015

Mar 2, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2015-02-26

Reporting Person: Snodgres Jon (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-02-26	Common Stock	A	5945	$0.00	Acquired	10945	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-02-26	Stock Option (Right to Buy)	$24.98	A	11445	Acquired		Common Stock (11445)	Direct

Footnotes

F1: Mr. Snodgres was awarded 5,945 Restricted Stock Units. Each Restricted Stock Unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The Restricted Stock Units vest in equal annual installments over a three-year period beginning on the first anniversary of the grant date. The Restricted Stock Units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

F2: The shares vest in equal annual installments over a three-year period beginning on the first anniversary of the grant date.