REPLIGEN CORP (RGEN) Insider Trading -- Recent Executive & Director Transactions
15 insiders reported 94 Form 4 transactions for REPLIGEN CORP (RGEN) over the past 18 months (most recent 2026-10-08). Recent activity: Douglass Brian Robb (CHIEF PRODUCT OFFICER) Buy 700 shares, Loeillot Olivier (Chief Executive Officer) Sell 1,333 shares, Loeillot Olivier (Chief Executive Officer) Buy 4,202 shares, Loeillot Olivier (Chief Executive Officer) Sell 4,202 shares, Loeillot Olivier (Chief Executive Officer) Sell 1,248 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-08 | Douglass Brian Robb | CHIEF PRODUCT OFFICER | Buy | 700 | $0 |
| 2026-10-06 | Loeillot Olivier | Chief Executive Officer | Sell | 1,333 | $238,274 |
| 2026-10-06 | Loeillot Olivier | Chief Executive Officer | Buy | 4,202 | $651,142 |
| 2026-10-06 | Loeillot Olivier | Chief Executive Officer | Sell | 4,202 | $798,380 |
| 2026-10-05 | Loeillot Olivier | Chief Executive Officer | Sell | 1,248 | $226,762 |
| 2026-09-28 | Garland Jason K | CFO | Sell | 421 | $79,855 |
| 2026-09-25 | Loeillot Olivier | Chief Executive Officer | Buy | 8,404 | $1.3M |
| 2026-09-25 | Loeillot Olivier | Chief Executive Officer | Sell | 8,404 | $1.6M |
| 2026-09-25 | Loeillot Olivier | Chief Executive Officer | Buy | 4,542 | $705,736 |
| 2026-09-25 | Loeillot Olivier | Chief Executive Officer | Sell | 4,542 | $862,980 |
| 2026-09-22 | Loeillot Olivier | Chief Executive Officer | Buy | 5,426 | $769,353 |
| 2026-09-22 | Loeillot Olivier | Chief Executive Officer | Sell | 5,426 | $976,680 |
| 2026-09-08 | Loeillot Olivier | Chief Executive Officer | Sell | 2,842 | $482,032 |
| 2026-09-08 | Loeillot Olivier | Chief Executive Officer | Sell | 3,035 | $503,506 |
| 2026-09-02 | Hughes Violetta | CHIEF ACCOUNTING OFFICER | Buy | 2,466 | $0 |
| 2026-09-02 | Hughes Violetta | CHIEF ACCOUNTING OFFICER | Sell | 277 | $47,096 |
| 2026-08-21 | Loeillot Olivier | Chief Executive Officer | Buy | 5,426 | $769,353 |
| 2026-08-21 | Loeillot Olivier | Chief Executive Officer | Sell | 5,426 | $976,680 |
| 2026-07-17 | Garland Jason K | CFO | Sell | 530 | $79,500 |
| 2026-06-26 | Garland Jason K | CFO | Sell | 733 | $106,285 |
| 2026-05-18 | Pax Margaret | Director | Buy | 995 | $0 |
| 2026-05-18 | Mhatre Rohin | Director | Buy | 995 | $0 |
| 2026-05-18 | Konstantinov Konstantin | Director | Buy | 995 | $0 |
| 2026-05-18 | DAWES KAREN A | Director | Buy | 995 | $0 |
| 2026-05-18 | BARTHELEMY NICOLAS | Director | Buy | 995 | $0 |
Source: SEC Form 4 filings · as of 2026-10-08