REPLIGEN CORP — Director's Dealing 2019

May 15, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2019-05-13

Reporting Person: KURIYEL RALF (Senior VP, R&D)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-13	Common Stock	A	8000	$0.00	Acquired	26803	Direct

Footnotes

F1: Mr. Kuriyel was awarded 8,000 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 five-year period beginning on the first anniversary of the grant date. The restricted stock units may be settled only be delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.