According to recent filings covering the 90 days ending January 10, 2026, the three most significant insider holders at Repligen are Director Anthony Hunt (98.96K shares), Director Karen A Dawes (91.82K shares), Chief Financial Officer Jon Snodgres (37.38K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Anthony Hunt | 98,959 | 08 Dec, 2025 | |
| Karen A Dawes | 91,821 | 18 Dec, 2025 | |
| Jon Snodgres | Chief Financial Officer | 37,381 | 16 May, 2023 |
| Glenn P Muir | 36,622 | 17 Dec, 2025 | |
| Olivier Loeillot | Chief Executive Officer | 35,898 | 26 Nov, 2025 |
| Christine Gebski | Nan | 27,419 | 15 May, 2024 |
| James Bylund | Chief Operating Officer | 21,520 | 19 Nov, 2025 |
| Ralf Kuriyel | Senior Vp And R&D | 16,062 | 04 Mar, 2025 |
| Jason K Garland | Cfo | 13,383 | 26 Sep, 2025 |
| Martin D Madaus | 7,386 | 19 May, 2025 | |
| Manner Carrie Eglinton | 4,466 | 19 May, 2025 | |
| Nicolas Barthelemy | 4,441 | 21 May, 2025 | |
| Violetta Hughes | Chief Accounting Officer | 4,142 | 04 Sep, 2025 |
| Rohin Mhatre | 4,019 | 19 May, 2025 | |
| Konstantin Konstantinov | 2,894 | 19 May, 2025 | |
| Margaret Pax | 2,016 | 19 May, 2025 | |
| Thomas F Jr Ryan | 1,457 | 02 Mar, 2022 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Dec, 2025 | Karen A Dawes | Common Stock | D | 275 | $161.00 | 91,821 | D | S |
| 16 Dec, 2025 | Glenn P Muir | Common Stock | A | 3,366 | $26.12 | 36,622 | D | M |
| 04 Dec, 2025 | Anthony Hunt | Common Stock | D | 2,000 | - | 98,959 | D | J |
| 25 Nov, 2025 | Olivier Loeillot | Common Stock | D | 7,041 | $170.00 | 35,898 | D | S |
| 18 Nov, 2025 | James Bylund | Common Stock | D | 2,191 | $151.21 | 21,520 | D | S |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | D | 5,737 | $156.22 | 82,699 | D | S |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | D | 2,500 | $154.32 | 91,436 | D | S |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | D | 1,956 | $157.11 | 80,743 | D | S |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | A | 2,952 | $33.87 | 83,695 | D | M |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | D | 2,923 | $153.14 | 93,936 | D | S |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | D | 2,100 | $152.17 | 96,859 | D | S |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | D | 3,000 | $155.45 | 88,436 | D | S |
| 13 Nov, 2025 | Anthony Hunt | Common Stock | D | 1,784 | $151.01 | 98,959 | D | S |
| 12 Nov, 2025 | Anthony Hunt | Common Stock | D | 11,096 | $158.01 | 101,207 | D | S |
| 12 Nov, 2025 | Anthony Hunt | Common Stock | D | 464 | $158.51 | 100,743 | D | S |
| 12 Nov, 2025 | Anthony Hunt | Common Stock | A | 25,000 | $33.87 | 125,743 | D | M |
| 12 Nov, 2025 | Anthony Hunt | Common Stock | D | 4,959 | $156.65 | 112,303 | D | S |
| 12 Nov, 2025 | Anthony Hunt | Common Stock | D | 3,741 | $154.92 | 122,002 | D | S |
| 12 Nov, 2025 | Anthony Hunt | Common Stock | D | 4,740 | $155.85 | 117,262 | D | S |
| 02 Oct, 2025 | Olivier Loeillot | Common Stock | D | 1,248 | $145.23 | 42,939 | D | F |