Signature
/s/ James C. Foster
Issuer symbol
CRL
Transactions as of
02 Mar 2026
Net transactions value
$0
Form type
4
Filing time
04 Mar 2026, 16:42:20 UTC
Previous filing
02 Feb 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
FOSTER JAMES C Chairman, President and CEO, Director C/O CHARLES RIVER LABORATORIES, 251 BALLARDVALE STREET, WILMINGTON /s/ James C. Foster 04 Mar 2026 0001141722

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CRL Common Stock Award +16,796 +6.4% $178.61* 279,693 02 Mar 2026 Direct F1, F2
holding CRL Common Stock 5,423 02 Mar 2026 2024 GRAT
holding CRL Common Stock 10,780 02 Mar 2026 2025 GRAT
holding CRL Common Stock 230 02 Mar 2026 by Trust
holding CRL Common Stock 750 02 Mar 2026 By Trust
holding CRL Common Stock 2,250 02 Mar 2026 By Trust
holding CRL Common Stock 10,000 02 Mar 2026 Held By Spouse
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 100% of the unvested restricted stock units vest on March 2, 2028.
F2 Reflects the exempt transfer pursuant to Rule 16a-13 of 9,220 shares from the 2025 GRAT account to direct holdings.