# EDGAR Filing Document

**Accession Number:** 0000730272
**File Stem:** 0001193125-26-140126
**Filing Date:** 2026-4
**Character Count:** 2267
**Document Hash:** bf981e9866562919a85a025cefc5e717
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-140126.hdr.sgml**: 20260402

**ACCESSION NUMBER**: 0001193125-26-140126

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260402

**DATE AS OF CHANGE**: 20260402

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** REPLIGEN CORP
- **CENTRAL INDEX KEY:** 0000730272
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 042729386
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-14656
- **FILM NUMBER:** 26833640

**BUSINESS ADDRESS:**
- **STREET 1:** 41 SEYON STREET
- **STREET 2:** BUILDING 1, SUITE 100
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02453
- **BUSINESS PHONE:** 7814499560

**MAIL ADDRESS:**
- **STREET 1:** 41 SEYON STREET
- **STREET 2:** BUILDING 1, SUITE 100
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02453

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 14A**

(RULE 14a-101)

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No.)

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| | |
|:---|:---|
| Filed by the Registrant  | Filed by the Registrant  |
| Filed by a Party other than the Registrant □ | Filed by a Party other than the Registrant □ |
| Check the appropriate box: | Check the appropriate box: |
| □ | Preliminary Proxy Statement |
| □ | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| □ | Definitive Proxy Statement |
|  | Definitive Additional Materials |
| □ | Soliciting Material under §240.14a-12 |

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**REPLIGEN CORPORATION**

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

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| | |
|:---|:---|
|  | No fee required. |
| □ | Fee paid previously with preliminary materials. |
| □ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

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