REPLIGEN CORP — Director's Dealing 2021

Mar 9, 2021

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2021-02-25

Reporting Person: Bylund James (SVP, Global Operations & IT)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5000	Direct
Common Stock	1684	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (Right to Buy)	$94.33	2030-04-01	Common Stock (5300)		Direct
Stock Option (Right to Buy)	$94.33	2030-04-01	Common Stock (4700)		Direct
Stock Option (Right to Buy)	$207.07	2031-02-23	Common Stock (2033)		Direct

Footnotes

F1: Mr. Bylund was awarded 5,000 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 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: Mr. Bylund was awarded 1,684 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.

F3: This option shall vest in equal yearly installments over a five-year period beginning on 4/1/2021.

F4: This option shall vest in equal yearly installments over a three-year period beginning on 2/24/2022.