Charles River withholds 649 insider shares for taxes

Charles River Laboratories International, Inc. (CRL) SVP, Finance and CAO Michael Gunnar Knell had 649 common shares withheld on November 6, 2026, to satisfy tax withholding obligations applicable to vesting of stock-settled Restricted Stock Units.

Available on EDGAR 11/09/2026 - 04:33 PM EST Accepted by SEC EDGAR 11/09/2026 - 04:32 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Charles River Laboratories International, Inc. (CRL) SVP, Finance and CAO Michael Gunnar Knell had 649 common shares withheld on November 6, 2026, to satisfy tax withholding obligations applicable to vesting of stock-settled Restricted Stock Units. The reported price was $313.02 per share; Knell directly held 11,203 shares after the transaction.

Insider Trade Summary

Tax Withholding: 649 shares

Tax Withholding 1 txn

Insider Knell Michael Gunnar

Role SVP, Finance and CAO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	649	$313.02	$203K

Holdings After Transaction: Common Stock — 11,203 shares (Direct)

Footnotes (1)

1. F1. Represents shares of the Issuer's common stock withheld to satisfy tax withholding obligations applicable to the vesting of stock-settled Restricted Stock Units.

Key Figures

Common shares withheld: 649 shares Reported price per share: $313.02 per share Direct common shares held after transaction: 11,203 shares

3 metrics

Common shares withheld 649 shares For tax withholding obligations on November 6, 2026

Reported price per share $313.02 per share November 6, 2026 withholding transaction

Direct common shares held after transaction 11,203 shares Michael Gunnar Knell's reported position after the transaction

Key Terms

Restricted Stock Units, stock-settled, tax withholding obligations

3 terms

Restricted Stock Units financial

"vesting of stock-settled Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

stock-settled financial

"stock-settled Restricted Stock Units"

tax withholding obligations financial

"satisfy tax withholding obligations applicable to the vesting"

FAQ

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How many CRL shares were withheld for taxes?

Michael Gunnar Knell had 649 common shares withheld on November 6, 2026, at a reported price of $313.02 per share to satisfy tax withholding obligations applicable to vesting of stock-settled Restricted Stock Units.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Knell Michael Gunnar

(Last) (First) (Middle)

C/O CHARLES RIVER LABORATORIES

251 BALLARDVALE STREET

(Street)

WILMINGTON MASSACHUSETTS 01887

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CHARLES RIVER LABORATORIES INTERNATIONAL, INC. [ CRL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Finance and CAO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/06/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/06/2026		F		649(1)	D	$313.02	11,203	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares of the Issuer's common stock withheld to satisfy tax withholding obligations applicable to the vesting of stock-settled Restricted Stock Units.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Heather Turner as attorney-in-fact for Michael G. Knell	11/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)