REPLIGEN CORP — Director's Dealing 2019

Mar 5, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2019-02-28

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-02-28	Common Stock	A	4234	$0.00	Acquired	16528	Direct
2019-02-28	Common Stock	S	185	$59.16	Disposed	16343	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-02-28	Stock Option (Right to Buy)	$59.52	A	4042	Acquired	2029-02-28	Common Stock (4042)	Direct

Footnotes

F1: Mr. Kuriyel was awarded 4,234 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 be delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

F2: Sale of 185 shares in the open market to cover tax liability resulting from the release of restricted stock units.

F3: One third of the stock options will vest and become exercisable annually on February 28, 2020, February 28, 2021 and February 28, 2022.