Violetta Hughes - 02 Sep 2025 Form 4 Insider Report for REPLIGEN CORP (RGEN)

Role
CHIEF ACCOUNTING OFFICER
Signature
/s/ Jennifer Carmichael (Attorney in Fact)
Issuer symbol
RGEN
Transactions as of
02 Sep 2025
Net transactions value
$0
Form type
4
Filing time
04 Sep 2025, 12:47:44 UTC
Previous filing
04 Sep 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Hughes Violetta CHIEF ACCOUNTING OFFICER C/O REPLIGEN CORPORATION, 41 SEYON ST., BLDG 1, STE 100, WALTHAM /s/ Jennifer Carmichael (Attorney in Fact) 04 Sep 2025 0001991429

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction RGEN Common Stock Award $0 +4,142 $0.000000 4,142 02 Sep 2025 Direct F1

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 +3,914 $0.000000 3,914 02 Sep 2025 Common Stock 3,914 $120.69 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Ms. Hughes was awarded 4,142 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 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 The shares vest in equal annual instalments over a five-year period with each such vesting date occurring on the anniversary of the grant date.