As of May 23, 2026, Repligen's top three insider holders are Karen A Dawes (Director, 91.82K shares), Anthony Hunt (Chief Executive Officer, 89.06K shares), Olivier Loeillot (Chief Executive Officer, 54.25K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Glenn P Muir | - | 36,622 | 0 | 17 Dec, 2025 |
| Karen A Dawes | - | 91,821 | 0 | 18 Dec, 2025 |
| Thomas F Jr Ryan | - | 1,457 | 0 | 02 Mar, 2022 |
| Nicolas Barthelemy | - | 4,441 | 0 | 21 May, 2025 |
| Martin D Madaus | - | 5,586 | 0 | 19 May, 2025 |
| Anthony Hunt | Chief Executive Officer | 89,062 | 0 | 03 Mar, 2026 |
| Jon Snodgres | Chief Financial Officer | 37,381 | 0 | 16 May, 2023 |
| Manner Carrie Eglinton | - | 4,466 | 0 | 19 May, 2025 |
| Ralf Kuriyel | Senior Vp, Rd | 20,062 | 0 | 23 Mar, 2026 |
| Jason K Garland | Cfo | 20,092 | 0 | 23 Mar, 2026 |
| Konstantin Konstantinov | - | 2,894 | 0 | 19 May, 2025 |
| Rohin Mhatre | - | 4,019 | 0 | 19 May, 2025 |
| Christine Gebski | - | 27,419 | 0 | 15 May, 2024 |
| James Bylund | Chief Operating Officer | 25,423 | 0 | 23 Mar, 2026 |
| Violetta Hughes | Chief Accounting Officer | 4,142 | 0 | 04 Sep, 2025 |
| Olivier Loeillot | Chief Executive Officer | 54,246 | 0 | 22 Apr, 2026 |
| Margaret Pax | - | 2,016 | 0 | 19 May, 2025 |
| Brian Robb Douglass | Chief Product Officer | 8,319 | 0 | 03 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 21 Apr, 2026 | Olivier Loeillot | Common Stock | D | 3,832 | $140.00 | 54,246 | D | S |
| 05 Mar, 2026 | Olivier Loeillot | Common Stock | A | 24,134 | $0.00 | 58,078 | D | A |
| 05 Mar, 2026 | James Bylund | Common Stock | A | 7,751 | $0.00 | 25,423 | D | A |
| 05 Mar, 2026 | Ralf Kuriyel | Common Stock | A | 5,284 | $0.00 | 20,062 | D | A |
| 05 Mar, 2026 | Jason K Garland | Common Stock | A | 7,751 | $0.00 | 20,092 | D | A |
| 05 Mar, 2026 | Ralf Kuriyel | Stock Option (Right to Buy) | A | 5,669 | $0.00 | 5,669 | D | A |
| 05 Mar, 2026 | James Bylund | Stock Option (Right to Buy) | A | 8,315 | $0.00 | 8,315 | D | A |
| 05 Mar, 2026 | Jason K Garland | Stock Option (Right to Buy) | A | 8,315 | $0.00 | 8,315 | D | A |
| 05 Mar, 2026 | Olivier Loeillot | Stock Option (Right to Buy) | A | 25,890 | $0.00 | 25,890 | D | A |
| 04 Mar, 2026 | James Bylund | Common Stock | A | 125 | $0.00 | 17,734 | D | A |
| 04 Mar, 2026 | Ralf Kuriyel | Common Stock | A | 125 | $0.00 | 14,820 | D | A |
| 04 Mar, 2026 | Ralf Kuriyel | Common Stock | D | 42 | $125.84 | 14,778 | D | F |
| 04 Mar, 2026 | James Bylund | Common Stock | D | 62 | $125.84 | 17,672 | D | F |
| 27 Feb, 2026 | James Bylund | Common Stock | D | 1,478 | $128.73 | 20,042 | D | F |
| 27 Feb, 2026 | Jason K Garland | Common Stock | D | 327 | $128.73 | 13,056 | D | F |
| 27 Feb, 2026 | Olivier Loeillot | Common Stock | D | 344 | $128.73 | 35,554 | D | F |
| 02 Mar, 2026 | Anthony Hunt | Common Stock | D | 9,897 | $124.97 | 89,062 | D | F |
| 02 Mar, 2026 | Brian Robb Douglass | Common Stock | D | 221 | $124.97 | 8,319 | D | F |
| 27 Feb, 2026 | Ralf Kuriyel | Common Stock | D | 444 | $128.73 | 15,618 | D | F |
| 02 Mar, 2026 | James Bylund | Common Stock | D | 2,433 | $124.97 | 17,609 | D | F |