SEC Form 4 · accession 0001628280-26-063572
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 24, 2026
Accepted (ET)
Sep 25, 2026 · 4:09 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 Stock | Sep 24, 2026 | M | 8,404 | $154.96 | A | 56,773 | D | |
| Common Stock | Sep 24, 2026 | S | 8,404 | $190.00 | D | 48,369 | D | |
| Common Stock | Sep 24, 2026 | M | 4,542 | $155.38 | A | 52,911 | D | |
| Common Stock | Sep 24, 2026 | S | 4,542 | $190.00 | D | 48,369 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F2 | $154.96 | Sep 24, 2026 | M | 8,404 | D | — | Oct 2, 2033 | Common Stock | 8,404 | 12,607 | D |
| Stock Option (Right to Buy)F3 | $155.38 | Sep 24, 2026 | M | 4,542 | D | — | Mar 1, 2035 | Common Stock | 4,542 | 9,085 | D |
Explanation of responses
- F1The 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.
- F24,202 shares will vest on each of October 2, 2026, and October 2, 2027. 4,203 shares will vest on October 2, 2028.
- F34,542 shares will vest on March 1, 2027, and 4,543 shares will vest on March 1, 2028.