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 3.55M · Bought 12.2K · Sold 2.51M
Granted 878.5K · Sold 605.5K
Granted 151.7K · Bought 2.8K · Sold 59.0K
Granted 565.4K · Sold 451.8K
Granted 338.4K · Sold 247.0K
Granted 118.3K · Sold 63.5K
Granted 39.0K · Sold 16.5K
Granted 90.4K · Sold 24.8K
Granted 53.0K · Sold 41.9K
Granted 105.2K · Sold 75.4K
Granted 16.6K
Granted 66.6K · Bought 11.4K · Sold 69.7K
Granted 67.8K · Sold 35.0K
Granted 7.2K
Granted 128.5K · Bought 25 · Sold 80.4K
Granted 31.0K
Granted 120.2K · Sold 78.1K
Granted 54.2K · Sold 17.4K
Granted 439.7K · Sold 409.5K
Granted 27.8K
Granted 177.4K · Sold 118.7K
Granted 13.4K · Sold 2.0K
Granted 148.2K · Sold 104.7K
Granted 61.0K · Sold 44.0K
Granted 145.5K · Sold 155.0K
Granted 21.1K
Granted 17.1K
Granted 33.6K · Sold 12.1K
Sold 7.6K
Granted 12.5K · Sold 5.3K
Granted 51.5K · Sold 42.0K
Granted 13.7K
Granted 13.7K · Bought 100
Granted 11.5K
Granted 5.4K
Granted 4.3K
Granted 101.7K · Sold 91.6K
Granted 6.7K
Granted 6.3K
Granted 10.7K · Sold 3.8K
Granted 122.4K · Sold 107.3K
Granted 4.6K
Granted 3.9K
Granted 21.4K
Granted 3.3K
Granted 3.2K
Granted 2.4K
Granted 2.4K
Granted 2.4K
Granted 6.3K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Foster James CDirector · 3478 transactions | — | 476.6K | 3.55M | 12.2K | 2.51M |
| Johst David PCorporate Executive VP · 261 transactions | — | 224.5Kas of May 2020 | 878.5K | — | 605.5K |
| Girshick BirgitChief Executive Officer · 243 transactions | — | 159.6K | 151.7K | 2.8K | 59.0K |
| Ackerman Thomas FSenior Financial Advisor · 822 transactions | — | 111.3Kas of Feb 2016 | 565.4K | — | 451.8K |
| Molho DavidePresident & COO · 295 transactions | — | 76.7Kas of Jul 2018 | 338.4K | — | 247.0K |
| Renaud Real HCorp. Executive VP · 79 transactions | — | 73.5Kas of Aug 2010 | 118.3K | — | 63.5K |
| Parisotto Shannon MCEVP, Disc & Safety Assessment · 57 transactions | — | 67.6K | 39.0K | — | 16.5K |
| Reese C RichardDirector · 40 transactions | — | 65.1Kas of May 2023 | 90.4K | — | 24.8K |
| Waltrip WilliamDirector · 90 transactions | — | 41.7Kas of Dec 2012 | 53.0K | — | 41.9K |
| Chubb Stephen DDirector · 119 transactions | — | 41.2Kas of Feb 2021 | 105.2K | — | 75.4K |
| Acford Joanne PCorp. Sr VP, GC and Corp. Sec · 5 transactions | — | 37.1Kas of Aug 2007 | 16.6K | — | — |
| Wallman Richard FDirector · 72 transactions | — | 35.6Kas of Nov 2024 | 66.6K | 11.4K | 69.7K |
| Bertolini Robert JDirector · 170 transactions | — | 32.8Kas of May 2024 | 67.8K | — | 35.0K |
| Berthoux ChristopheExecutive Vice President · 5 transactions | — | 32.0Kas of Feb 2010 | 7.2K | — | — |
| LaPlume Joseph WEVP, Corp Strategy & Develop · 182 transactions | — | 31.3K | 128.5K | 25 | 80.4K |
| Chang Nancy TDirector · 6 transactions | — | 31.0Kas of May 2010 | 31.0K | — | — |
| Milne George M JrDirector · 75 transactions | — | 30.1Kas of May 2021 | 120.2K | — | 78.1K |
| Creamer Victoria LEVP & Chief People Officer · 47 transactions | — | 30.1K | 54.2K | — | 17.4K |
| Gillett NancyCorporate Executive VP · 610 transactions | — | 27.8Kas of Mar 2016 | 439.7K | — | 409.5K |
| Coleman GlennEVP & Chief Financial Officer · 2 transactions | — | 27.8K | 27.8K | — | — |
| Smith David RossCorporate Executive VP & CFO · 484 transactions | — | 27.1Kas of Mar 2022 | 177.4K | — | 118.7K |
| Berthoux ChristopherExecutive Vice President · 12 transactions | — | 26.4Kas of Feb 2009 | 13.4K | — | 2.0K |
| Barbo William DCorporate Executive VP & CCO · 298 transactions | — | 25.8Kas of Nov 2024 | 148.2K | — | 104.7K |
| Thier Samuel O MDDirector · 136 transactions | — | 18.2Kas of May 2012 | 61.0K | — | 44.0K |
| Geller JorgCorporate Executive VP · 444 transactions | — | 17.5Kas of Feb 2015 | 145.5K | — | 155.0K |
| Pease FlaviaCorporate Executive VP & CFO · 15 transactions | — | 17.3Kas of May 2025 | 21.1K | — | — |
| Mackay MartinDirector · 22 transactions | — | 17.1K | 17.1K | — | — |
| Knell Michael GunnarSVP, Finance and CAO · 76 transactions | — | 16.2K | 33.6K | — | 12.1K |
| Bathgate BrianCorporate Vice President · 2 transactions | — | 16.1Kas of Feb 2006 | — | — | 7.6K |
| Elliott David JOfficer · 19 transactions | — | 16.0Kas of Jun 2007 | 12.5K | — | 5.3K |
| Rogers Douglas EDirector · 20 transactions | — | 12.9Kas of May 2010 | 51.5K | — | 42.0K |
| Ventresca NicholasSenior Vice President · 3 transactions | — | 12.7Kas of Apr 2007 | 13.7K | — | — |
| Ho John CSenior Vice President · 4 transactions | — | 12.7Kas of Feb 2007 | 13.7K | 100 | — |
| Wells Stephanie BSenior Vice President · 1 transaction | — | 11.5Kas of Apr 2007 | 11.5K | — | — |
| Andrews Nancy CDirector · 10 transactions | — | 10.8K | 5.4K | — | — |
| Mintz MarkEVP, Chief Information Officer · 7 transactions | — | 9.5K | 4.3K | — | — |
| Kochevar Deborah TurnerDirector · 223 transactions | — | 7.9Kas of May 2024 | 101.7K | — | 91.6K |
| Llado George Sr.Director · 13 transactions | — | 6.7K | 6.7K | — | — |
| Wilson Virginia MDirector · 8 transactions | — | 6.3K | 6.3K | — | — |
| Crowley John JSVP, Chief Accounting Officer · 21 transactions | — | 5.6Kas of Oct 2016 | 10.7K | — | 3.8K |
| Massaro GeorgeDirector · 417 transactions | — | 5.6Kas of May 2025 | 122.4K | — | 107.3K |
| Kemps-Polanco ReshemaDirector · 7 transactions | — | 4.6K | 4.6K | — | — |
| Mangeolle Jean-PaulDirector · 2 transactions | — | 3.9Kas of May 2019 | 3.9K | — | — |
| Thompson Craig B.Director · 14 transactions | — | 3.9K | 21.4K | — | — |
| Barg StevenDirector · 4 transactions | — | 3.3K | 3.3K | — | — |
| Kuo John WCEVP General Counsel & CCO · 2 transactions | — | 3.2Kas of Jun 2020 | 3.2K | — | — |
| 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 | — | — |
| Walker Cheri LCorporate Senior VP · 1 transaction | — | 12as of May 2007 | 6.3K | — | — |
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 all recorded history: -5.45M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.