James Bylund - 02 Mar 2023 Form 4 Insider Report for REPLIGEN CORP (RGEN)

Role: Chief Operating Officer
Signature: /s/ Kimberly Brown (Attorney in Fact)
Issuer symbol: RGEN
Transactions as of: 02 Mar 2023
Net transactions value: -$39,480
Form type: 4
Filing time: 06 Mar 2023, 16:13:10 UTC
Previous filing: 28 Feb 2023
Next filing: 04 Apr 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RGEN	Common Stock	Award	$0	+8,348	+91%	$0.000000	17,487	02 Mar 2023	Direct	F1
transaction	RGEN	Common Stock	Award	$0	+625	+3.6%	$0.000000	18,112	03 Mar 2023	Direct	F2
transaction	RGEN	Common Stock	Tax liability	$39,480	-210	-1.2%	$188.00	17,902	03 Mar 2023	Direct	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	RGEN	Stock Option (Right to Buy)	Award	$0	+8,644		$0.000000	8,644	02 Mar 2023	Common Stock	8,644	$180.48	Direct	F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Mr. Bylund was awarded 8,348 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 instalments 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	Represents shares issued pursuant to a Performance Stock Unit ("PSU") award granted to the Issuer on January 1, 2022. The Compensation Committee authorized the issuance of the underlying shares based upon the Issuer's achievement of pre-established performance criteria set forth in the PSU award.
F3	Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the settlement of the PSUs.
F4	One third of the stock options will vest and become exercisable annually on March 2, 2024, March 2, 2025 and March 2, 2026.