Martin D. Madaus - 08 Aug 2025 Form 4 Insider Report for REPLIGEN CORP (RGEN)

Role: Director
Signature: /s/ Marc Baumgartner (Attorney in Fact)
Issuer symbol: RGEN
Transactions as of: 08 Aug 2025
Net transactions value: +$201,830
Form type: 4
Filing time: 12 Aug 2025, 12:47:07 UTC
Previous filing: 19 May 2025
Next filing: 06 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Madaus Martin D	Director	C/O REPLIGEN CORPORATION, 41 SEYON ST., BLDG 1, STE 100, WALTHAM	/s/ Marc Baumgartner (Attorney in Fact)	12 Aug 2025	0001310268

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RGEN	Common Stock	Purchase	$201,830	+1,800	$112.13	1,800	08 Aug 2025	By Martin D. Madaus 2011 Revocable Trust	F1
holding	RGEN	Common Stock					5,586	08 Aug 2025	Direct
holding	RGEN	Common Stock					11	08 Aug 2025	Spouse Trust

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

Explanation of Responses:

Id	Content
F1	The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $111.72 to $112.35, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.

Content

The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $111.72 to $112.35, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.