Konstantinov Konstantin (CIK 1774649) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-18). Recent activity: Buy RGEN (995 shares), Buy RGEN (973 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-18 | REPLIGEN CORP (RGEN) | Director | Buy | 995 | $0 |
| 2025-05-19 | REPLIGEN CORP (RGEN) | Director | Buy | 973 | $0 |
Source: SEC Form 4 filings · as of 2026-05-18