Bylund James (CIK 1849642) reported 13 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-23). Recent activity: Buy RGEN (7,751 shares), Buy RGEN (125 shares), Sell RGEN (62 shares), Sell RGEN (1,478 shares), Sell RGEN (2,433 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-23 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Buy | 7,751 | $0 |
| 2026-03-05 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Buy | 125 | $0 |
| 2026-03-05 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 62 | $7,802 |
| 2026-03-03 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 1,478 | $190,263 |
| 2026-03-03 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 2,433 | $304,052 |
| 2025-11-19 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 2,191 | $331,301 |
| 2025-04-02 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 454 | $58,339 |
| 2025-03-20 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Buy | 381 | $0 |
| 2025-03-20 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 175 | $24,927 |
| 2025-03-04 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Buy | 6,435 | $0 |
| 2025-03-04 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 1,239 | $192,516 |
| 2025-02-28 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 1,285 | $201,154 |
| 2025-02-25 | REPLIGEN CORP (RGEN) | Chief Operating Officer | Sell | 543 | $89,454 |
Source: SEC Form 4 filings · as of 2026-03-23