Anthony Hunt - Mar 2, 2023 Form 4 Insider Report for REPLIGEN CORP (RGEN)

Role: Chief Executive Officer, Director
Signature: /s/ Kimberly Brown (Attorney in Fact)
Stock symbol: RGEN
Transactions as of: Mar 2, 2023
Transactions value $: -$1,549,872
Form type: 4
Date filed: 3/6/2023, 04:23 PM
Previous filing: Feb 28, 2023
Next filing: Jun 16, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RGEN	Common Stock	Award	$0	+19.4K	+11.71%	$0.00	185K	Mar 2, 2023	Direct	F1
transaction	RGEN	Common Stock	Award	$0	+18.6K	+10.05%	$0.00	204K	Mar 3, 2023	Direct	F2
transaction	RGEN	Common Stock	Tax liability	-$1.55M	-8.24K	-4.05%	$188.00	195K	Mar 3, 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	+20.1K		$0.00	20.1K	Mar 2, 2023	Common Stock	20.1K	$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. Hunt was awarded 19,393 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 18,584 shares issued pursuant to a Performance Stock Unit ("PSU") award granted to the Issuer on February 27, 2020. 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.