Based on data from the past 90 days ending January 10, 2026, Charles River Laboratories International's three largest insider shareholders are Chairman And President And Ceo James C Foster (214.73K shares), Corporate Executive Vp & Coo Birgit Girshick (65.94K shares), Director C Richard Reese (65.54K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| James C Foster | Chairman And President And Ceo | 214,733 | 02 Jun, 2025 |
| Birgit Girshick | Corporate Executive Vp & Coo | 65,944 | 02 Jun, 2025 |
| C Richard Reese | 65,541 | 17 May, 2023 | |
| Shannon M Parisotto | Cevp And Disc & Safety Assessment | 40,220 | 03 Jun, 2025 |
| Robert J Bertolini | 32,802 | 15 May, 2024 | |
| George M Jr Milne | 29,079 | 10 May, 2021 | |
| David Ross Smith | Corporate Executive Vp & Cfo | 25,819 | 04 Mar, 2022 |
| William D Barbo | Corporate Executive Vp & Cco | 25,310 | 08 Nov, 2024 |
| Joseph W Laplume | Evp And Corp Strategy & Develop | 24,116 | 20 Aug, 2025 |
| Victoria L Creamer | Evp & Chief People Officer | 22,362 | 02 Jun, 2025 |
| Flavia Pease | Corporate Executive Vp & Cfo | 17,297 | 02 Jun, 2025 |
| Martin Mackay | 14,292 | 23 May, 2025 | |
| Michael Gunnar Knell | Csvp And Cao And Interim Cfo | 13,460 | 07 Nov, 2025 |
| Richard F Wallman | 12,386 | 08 Nov, 2024 | |
| Deborah Turner Kochevar | 7,894 | 15 May, 2024 | |
| George Massaro | 5,575 | 16 May, 2025 | |
| Virginia M Wilson | 4,911 | 23 May, 2025 | |
| George Sr. Llado | 4,814 | 23 May, 2025 | |
| Nancy C Andrews | 3,964 | 23 May, 2025 | |
| Reshema Kemps-Polanco | 2,590 | 23 May, 2025 | |
| Craig B. Thompson | 2,413 | 23 May, 2025 | |
| Steven Barg | 1,427 | 04 Jun, 2025 | |
| Abraham Ceesay | 946 | 04 Jun, 2025 | |
| Mark J Enyedy | 946 | 04 Jun, 2025 | |
| Paul W Graves | 946 | 04 Jun, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 06 Nov, 2025 | Michael Gunnar Knell | Common Stock | A | 2,926 | $170.88 | 13,460 | D | A |
| 18 Aug, 2025 | Joseph W Laplume | - | - | 24,116 | D | |||
| 18 Aug, 2025 | Joseph W Laplume | Common Stock | D | 800 | $157.60 | 24,116 | D | S |
| 07 Aug, 2025 | Joseph W Laplume | Common Stock | D | 400 | $150.04 | 24,916 | D | S |
| 05 Jun, 2025 | Joseph W Laplume | Common Stock | D | 385 | $0.00 | 25,316 | D | G |
| 02 Jun, 2025 | Paul W Graves | Common Stock | A | 946 | $135.04 | 946 | D | A |
| 02 Jun, 2025 | Mark J Enyedy | Common Stock | A | 946 | $135.04 | 946 | D | A |
| 02 Jun, 2025 | Abraham Ceesay | Common Stock | A | 946 | $135.04 | 946 | D | A |
| 02 Jun, 2025 | Steven Barg | - | - | 481 | D | |||
| 02 Jun, 2025 | Steven Barg | Common Stock | A | 481 | $135.04 | 481 | D | A |
| 02 Jun, 2025 | Steven Barg | Common Stock | A | 946 | $135.04 | 1,427 | D | A |
| 02 Jun, 2025 | Steven Barg | - | - | 1,427 | D | |||
| 01 Jun, 2025 | Michael Gunnar Knell | Common Stock | D | 225 | $135.63 | 10,534 | D | F |
| 31 May, 2025 | Michael Gunnar Knell | Common Stock | D | 48 | $135.63 | 10,759 | D | F |
| 31 May, 2025 | Victoria L Creamer | Common Stock | D | 120 | $135.63 | 22,362 | D | F |
| 31 May, 2025 | Birgit Girshick | Common Stock | D | 283 | $135.63 | 65,944 | D | F |
| 31 May, 2025 | Joseph W Laplume | Common Stock | D | 155 | $135.63 | 25,701 | D | F |
| 31 May, 2025 | Flavia Pease | Common Stock | D | 185 | $135.63 | 17,297 | D | F |
| 31 May, 2025 | Shannon M Parisotto | Common Stock | D | 105 | $135.63 | 12,997 | D | F |
| 30 May, 2025 | James C Foster | - | - | 210,685 | D |