CRL SVP granted 1,837 shares; 200 withheld for tax

CHARLES RIVER LABORATORIES INTERNATIONAL, INC. executive Michael Gunnar Knell, SVP Finance and CAO, reported compensation-related equity activity in company common stock.

Rhea-AI Filing Summary

CHARLES RIVER LABORATORIES INTERNATIONAL, INC. executive Michael Gunnar Knell, SVP Finance and CAO, reported compensation-related equity activity in company common stock. On May 29, 2026, he received a grant of 1,837 shares of common stock valued at $180.71 per share as a stock award. On May 30, 2026 and May 31, 2026, a total of 200 shares (152 and 48 shares, respectively) were disposed of as tax-withholding transactions at the same reference price of $180.71 per share, meaning the shares were used to cover tax obligations rather than sold in the open market. After these transactions, Knell directly owned 16,152 shares of common stock. A footnote states that unvested restricted stock units will ratably vest each year on May 29, 2027, May 29, 2028, May 29, 2029, and May 29, 2030, indicating a multi-year vesting schedule for his equity awards.

Insights

Equity compensation analyst

Routine equity award with tax withholding; no open-market trading signal.

The filing shows Michael Gunnar Knell receiving 1,837 shares of common stock as a compensation grant at $180.71 per share. This is coded as an acquisition (A), reflecting standard equity-based pay rather than a market purchase.

Two subsequent F-code entries totaling 200 shares are labeled as tax-withholding dispositions to cover exercise price or tax liabilities, not open-market sales. These mechanistic transactions typically carry limited information about management’s view of the stock.

Following the activity, Knell holds 16,152 shares directly, suggesting the net change is modest relative to his reported position. A footnote describing restricted stock units vesting annually through 2030 underscores that a meaningful portion of his compensation remains tied to future stock performance.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Knell Michael Gunnar

Role SVP, Finance and CAO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	48	$180.71	$9K
Exercise Price or Tax Liability	Common Stock	152	$180.71	$27K
Grant/Award	Common Stock	1,837	$180.71	$332K

Holdings After Transaction: Common Stock — 16,152 shares (Direct)

Footnotes (1)

1. F1. Unvested restricted stock units annually ratably vest on: May 29, 2027; May 29, 2028; May 29, 2029; May 29, 2030.

Key Figures

Stock grant: 1,837 shares Tax withholding 1: 152 shares Tax withholding 2: 48 shares +3 more

6 metrics

Stock grant 1,837 shares Common stock award at $180.71 per share on May 29, 2026

Tax withholding 1 152 shares F-code tax-withholding disposition at $180.71 per share on May 30, 2026

Tax withholding 2 48 shares F-code tax-withholding disposition at $180.71 per share on May 31, 2026

Total tax-withheld shares 200 shares Sum of F-code tax-withholding dispositions in this filing

Holding after transactions 16,152 shares Common stock directly owned following reported transactions

Reference price $180.71 per share Transaction price used for grant and tax-withholding entries

Key Terms

tax-withholding disposition, grant/award acquisition, restricted stock units

3 terms

tax-withholding disposition financial

"a total of 200 shares were disposed of as tax-withholding transactions"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

grant/award acquisition financial

"he received a grant of 1,837 shares of common stock as a stock award"

restricted stock units financial

"Unvested restricted stock units annually ratably vest on: May 29, 2027; May 29, 2028; May 29, 2029; May 29, 2030."

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did CRL executive Michael Gunnar Knell report?

Michael Gunnar Knell reported receiving 1,837 shares of CHARLES RIVER LABORATORIES common stock as a grant at $180.71 per share, plus two tax-withholding dispositions totaling 200 shares used to cover tax obligations rather than open-market sales.

Were the CRL insider Form 4 transactions open-market buys or sells?

The Form 4 shows no open-market buys or sells. It reports one stock grant (code A) of 1,837 shares and two F-code dispositions totaling 200 shares, which were used for tax withholding instead of discretionary market trades.

How many CRL shares does Michael Gunnar Knell hold after these Form 4 transactions?

After the reported transactions, Michael Gunnar Knell directly owns 16,152 shares of CHARLES RIVER LABORATORIES common stock. This reflects the 1,837-share grant and the 200 shares withheld for taxes across the two F-code transactions disclosed.

What do the F-code tax-withholding transactions mean in the CRL Form 4?

The two F-code entries, for 152 shares and 48 shares at $180.71 per share, represent shares delivered to satisfy tax liabilities. These are tax-withholding dispositions, not open-market sales, and are typically mechanical parts of equity compensation.

What is the vesting schedule mentioned in the CRL Form 4 footnote?

A footnote explains that unvested restricted stock units will vest annually on May 29, 2027, May 29, 2028, May 29, 2029, and May 29, 2030. This indicates a multi-year vesting timeline for Knell’s restricted stock unit awards.

How large is the CRL equity award to Michael Gunnar Knell in this filing?

The filing reports a grant of 1,837 shares of common stock with a reference price of $180.71 per share. This is characterized as a grant or award acquisition, consistent with stock-based compensation rather than an open-market purchase.

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

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Accepted by SEC EDGAR 06/02/2026 - 04:37 PM EDT Learn about SEC filing dates

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)
05/29/2026

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	05/29/2026		A		1,837(1)	A	$180.71	16,352	D
Common Stock	05/30/2026		F		152	D	$180.71	16,200	D
Common Stock	05/31/2026		F		48	D	$180.71	16,152	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. Unvested restricted stock units annually ratably vest on: May 29, 2027; May 29, 2028; May 29, 2029; May 29, 2030.

	/s/ Michael G. Knell	06/02/2026
	** 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)