Charles River Laboratories International, Inc.
A maker of research animals and drug-development services, Charles River Laboratories supplies the lab rats, mice, and testing that pharmaceutical and biotech companies rely on to bring new medicines to market. It began in 1947 when a young veterinarian, Dr. Henry Foster, started a one-man operation in a Boston loft overlooking the Charles River—the source of its name—personally breeding and hand-delivering the animals to local scientists. Foster paid for his first thousand rat cages with savings from a job as a vet on ships hauling horses to Poland.
Granted 304.3K · Bought 11.7K · Sold 136.3K
Granted 77.9K · Bought 2.8K · Sold 5.6K
Granted 39.0K · Sold 16.5K
Granted 2.1K
Granted 2.6K · Bought 4.3K · Sold 14.8K
Granted 3.1K
Granted 72.5K · Bought 25 · Sold 32.5K
Granted 46.3K · Sold 10.5K
Granted 27.8K
Granted 26.4K · Sold 9.0K
Granted 33.2K · Sold 13.0K
Granted 21.1K
Granted 7.5K
Granted 21.6K · Sold 5.9K
Granted 4.2K
Granted 4.3K
Granted 1.8K
Granted 5.7K
Granted 4.2K
Granted 4.3K · Sold 3.6K
Granted 4.6K
Granted 3.9K
Granted 3.3K
Granted 2.4K
Granted 2.4K
Granted 2.4K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Foster James CDirector · 88 transactions | — | 476.6K | 304.3K | 11.7K | 136.3K |
| Girshick BirgitChief Executive Officer · 61 transactions | — | 159.6K | 77.9K | 2.8K | 5.6K |
| Parisotto Shannon MCEVP, Disc & Safety Assessment · 57 transactions | — | 67.6K | 39.0K | — | 16.5K |
| Reese C RichardDirector · 4 transactions | +2.6% | 65.1Kas of May 2023 | 2.1K | — | — |
| Wallman Richard FDirector · 17 transactions | -53.2% | 35.6Kas of Nov 2024 | 2.6K | 4.3K | 14.8K |
| Bertolini Robert JDirector · 6 transactions | +10.3% | 32.8Kas of May 2024 | 3.1K | — | — |
| LaPlume Joseph WEVP, Corp Strategy & Develop · 69 transactions | +219.2% | 31.3K | 72.5K | 25 | 32.5K |
| Creamer Victoria LEVP & Chief People Officer · 39 transactions | +252.3% | 30.1K | 46.3K | — | 10.5K |
| Coleman GlennEVP & Chief Financial Officer · 2 transactions | — | 27.8K | 27.8K | — | — |
| Smith David RossCorporate Executive VP & CFO · 13 transactions | +87.6% | 27.1Kas of Mar 2022 | 26.4K | — | 9.0K |
| Barbo William DCorporate Executive VP & CCO · 37 transactions | -12.4% | 25.8Kas of Nov 2024 | 33.2K | — | 13.0K |
| Pease FlaviaCorporate Executive VP & CFO · 15 transactions | — | 17.3Kas of May 2025 | 21.1K | — | — |
| Mackay MartinDirector · 12 transactions | +78.5% | 17.1K | 7.5K | — | — |
| Knell Michael GunnarSVP, Finance and CAO · 46 transactions | +180.6% | 16.2K | 21.6K | — | 5.9K |
| Andrews Nancy CDirector · 7 transactions | — | 10.8K | 4.2K | — | — |
| Mintz MarkEVP, Chief Information Officer · 7 transactions | — | 9.5K | 4.3K | — | — |
| Kochevar Deborah TurnerDirector · 3 transactions | +29.5% | 7.9Kas of May 2024 | 1.8K | — | — |
| Llado George Sr.Director · 9 transactions | +761.4% | 6.7K | 5.7K | — | — |
| Wilson Virginia MDirector · 5 transactions | +193% | 6.3K | 4.2K | — | — |
| Massaro GeorgeDirector · 25 transactions | +14.8% | 5.6Kas of May 2025 | 4.3K | — | 3.6K |
| Kemps-Polanco ReshemaDirector · 7 transactions | — | 4.6K | 4.6K | — | — |
| Thompson Craig B.Director · 5 transactions | -77.3% | 3.9K | 3.9K | — | — |
| Barg StevenDirector · 4 transactions | — | 3.3K | 3.3K | — | — |
| Ceesay AbrahamDirector · 2 transactions | — | 2.4K | 2.4K | — | — |
| Enyedy Mark JDirector · 2 transactions | — | 2.4K | 2.4K | — | — |
| Graves Paul WDirector · 2 transactions | — | 2.4K | 2.4K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 5 years: -228.9K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.