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 151.8K · Bought 11.7K · Sold 58.6K
Granted 49.0K · Bought 2.8K
Granted 25.6K · Sold 9.7K
Granted 1.0K · Sold 7.6K
Granted 953
Granted 34.7K · Bought 25 · Sold 21.4K
Granted 29.3K · Sold 10.5K
Granted 27.8K
Granted 2.9K · Sold 4.0K
Granted 12.0K
Granted 5.5K
Granted 11.7K · Sold 3.6K
Granted 2.9K
Granted 4.3K
Granted 559
Granted 4.2K
Granted 2.9K
Granted 559 · Sold 612
Granted 4.6K
Granted 2.9K
Granted 3.3K
Granted 2.4K
Granted 2.4K
Granted 2.4K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Foster James CDirector · 27 transactions | — | 476.6K | 151.8K | 11.7K | 58.6K |
| Girshick BirgitChief Executive Officer · 30 transactions | — | 159.6K | 49.0K | 2.8K | — |
| Parisotto Shannon MCEVP, Disc & Safety Assessment · 37 transactions | — | 67.6K | 25.6K | — | 9.7K |
| Wallman Richard FDirector · 6 transactions | -15% | 35.6Kas of Nov 2024 | 1.0K | — | 7.6K |
| Bertolini Robert JDirector · 2 transactions | +4.5% | 32.8Kas of May 2024 | 953 | — | — |
| LaPlume Joseph WEVP, Corp Strategy & Develop · 36 transactions | +25.3% | 31.3K | 34.7K | 25 | 21.4K |
| Creamer Victoria LEVP & Chief People Officer · 24 transactions | +82.1% | 30.1K | 29.3K | — | 10.5K |
| Coleman GlennEVP & Chief Financial Officer · 2 transactions | — | 27.8K | 27.8K | — | — |
| Barbo William DCorporate Executive VP & CCO · 8 transactions | +11.1% | 25.8Kas of Nov 2024 | 2.9K | — | 4.0K |
| Pease FlaviaCorporate Executive VP & CFO · 11 transactions | +94.3% | 17.3Kas of May 2025 | 12.0K | — | — |
| Mackay MartinDirector · 6 transactions | +47.7% | 17.1K | 5.5K | — | — |
| Knell Michael GunnarSVP, Finance and CAO · 27 transactions | +41.5% | 16.2K | 11.7K | — | 3.6K |
| Andrews Nancy CDirector · 5 transactions | — | 10.8K | 2.9K | — | — |
| Mintz MarkEVP, Chief Information Officer · 7 transactions | — | 9.5K | 4.3K | — | — |
| Kochevar Deborah TurnerDirector · 1 transaction | +7.6% | 7.9Kas of May 2024 | 559 | — | — |
| Llado George Sr.Director · 6 transactions | +169.8% | 6.7K | 4.2K | — | — |
| Wilson Virginia MDirector · 3 transactions | +86.4% | 6.3K | 2.9K | — | — |
| Massaro GeorgeDirector · 12 transactions | -0.9% | 5.6Kas of May 2025 | 559 | — | 612 |
| Kemps-Polanco ReshemaDirector · 7 transactions | — | 4.6K | 4.6K | — | — |
| Thompson Craig B.Director · 3 transactions | +324.1% | 3.9K | 2.9K | — | — |
| 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 3 years: -101.4K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.