SEC Form 4 · accession 0001628280-26-060911
REPLIGEN CORP · RGEN
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Olivier Loeillot
Officer — Chief Executive Officer · Director
Period of report
Sep 3, 2026
Accepted (ET)
Sep 8, 2026 · 4:13 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0000730272
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Sep 3, 2026 | F | 2,842 | $169.61 | D | 51,404 | D | |
| Common StockF2 | Sep 4, 2026 | S | 3,035 | $165.90 | D | 48,369 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Represents the number of shares withheld by the Issuer to satisfy the tax withholding obligations of the reporting person that arose upon the release of restricted stock units.
- F2The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 19, 2025.