Charles River Laboratories Officer Files Form 144 for $308K Stock Sale

Executive Summary

On October 5, 2026, Shannon M. Parisotto, an Officer of Charles River Laboratories International, Inc. ($CRL), submitted a Form 144 notice disclosing an intention to sell 981 shares of Common Stock with an estimated aggregate market value of $308,579.64.

Transaction Details

• Security: Common Stock
• Shares to Sell: 981
• Aggregate Market Value: $308,579.64 (~$314.56/share)
• Acquisition: Acquired on October 5, 2026, via stock option exercise from the issuer with cash payment.
• Broker: UBS Financial Services, Inc.
• Trading Plan: Executed pursuant to a Rule 10b5-1 trading plan adopted on March 4, 2026.

Prior Sales in Past 3 Months

In the preceding three months, the insider reported selling an aggregate of 10,799 shares across three transactions:

• 08/05/2026: 5,046 shares for $1,327,098.00
• 08/11/2026: 3,714 shares for $1,038,657.24
• 08/19/2026: 2,039 shares for $599,710.68

Significance & Market Context

This proposed sale represents a negligible fraction of Charles River Laboratories' 47,738,872 outstanding shares (<0.003%) and is part of a pre-established Rule 10b5-1 plan established in March 2026. Given the modest transaction size and scheduled nature of the option exercise and disposition, the trading significance is rated Low.