SEC Form 4 · accession 0001628280-26-060105
REPLIGEN CORP · RGEN
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Violetta Hughes
Officer — CHIEF ACCOUNTING OFFICER
Period of report
Mar 5, 2026
Accepted (ET)
Sep 2, 2026 · 4:18 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0000730272
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Mar 5, 2026 | A | 2,466 | $0.00 | A | 6,608 | D | |
| Common StockF2 | Sep 1, 2026 | F | 277 | $170.02 | D | 6,331 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Ms. Hughes was awarded 2,466 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 installments over a four-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.
- F2Represents 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.