CRL (NYSE: CRL) CIO receives stock grant; shares withheld for taxes

Q: Were Mark Mintz’s CRL share dispositions open-market sales?

No, the dispositions were tax-withholding transactions. A total of 305 shares on May 30, 2026 and 64 shares on May 31, 2026 were withheld by the issuer to pay tax liabilities, rather than sold in the open market.

Filing Impact

(Very High)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Charles River Laboratories International EVP and Chief Information Officer Mark Mintz received an equity award of 2,534 shares of common stock at a reference price of $180.71 per share. To cover tax obligations, 305 shares on May 30, 2026 and 64 shares on May 31, 2026 were withheld as tax-withholding dispositions, not open-market sales. After these transactions, he directly held 9,546 shares. The related restricted stock units are scheduled to vest annually on May 29 of 2027, 2028, 2029, and 2030.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Mintz Mark

Role EVP, Chief Information Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	64	$180.71	$12K
Tax Withholding	Common Stock	305	$180.71	$55K
Grant/Award	Common Stock	2,534	$180.71	$458K

Holdings After Transaction: Common Stock — 9,546 shares (Direct, null)

Footnotes (1)

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Key Figures

Equity grant: 2,534 shares at $180.71 Tax-withholding on May 30, 2026: 305 shares at $180.71 Tax-withholding on May 31, 2026: 64 shares at $180.71 +2 more

5 metrics

Equity grant 2,534 shares at $180.71 Common stock award to EVP & CIO Mark Mintz

Tax-withholding on May 30, 2026 305 shares at $180.71 Common stock withheld to satisfy tax liability

Tax-withholding on May 31, 2026 64 shares at $180.71 Additional common stock withheld for taxes

Post-transaction holdings 9,546 shares Directly owned common stock after reported transactions

RSU vesting dates May 29, 2027–May 29, 2030 Unvested restricted stock units vest annually on these dates

Key Terms

tax-withholding disposition, Grant, award, or other acquisition, restricted stock units, Common Stock

4 terms

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

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, or other acquisition financial

"transaction_code_description: "Grant, award, or other acquisition""

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.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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Form 4 Insider Transactions: What Each Field Means →

06/02/2026 - 04:42 PM

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^*

Mintz Mark

(Last)

(First)

(Middle)

C/O CHARLES RIVER LABORATORIES

251 BALLARDVALE ST

(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)
	EVP, Chief Information Officer

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/29/2026		A		2,534⁽¹⁾	A	$180.71	9,915	D
Common Stock	05/30/2026		F		305	D	$180.71	9,610	D
Common Stock	05/31/2026		F		64	D	$180.71	9,546	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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/ Mark Mintz	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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did CRL executive Mark Mintz report on this Form 4?

Mark Mintz reported receiving 2,534 shares of Charles River Laboratories common stock as an equity grant at $180.71 per share, with 305 shares and 64 shares withheld on subsequent days to satisfy tax obligations related to that award.

How many Charles River Laboratories shares does Mark Mintz hold after these transactions?

Following the reported equity grant and subsequent tax-withholding dispositions, Mark Mintz directly holds 9,546 shares of Charles River Laboratories common stock, as shown in the post-transaction ownership figures on the Form 4 filing.

What is the vesting schedule for Mark Mintz’s CRL restricted stock units?

The unvested restricted stock units associated with this award are scheduled to ratably vest annually on May 29 in each of 2027, 2028, 2029, and 2030, according to the footnote disclosure in the Form 4 filing.

What was the reference price used for Mark Mintz’s CRL equity award?

The Form 4 lists a transaction price of $180.71 per share for the 2,534-share equity grant to Mark Mintz. This figure serves as the reference value for the reported award and related tax-withholding dispositions.

How many CRL shares were used to cover Mark Mintz’s tax obligations?

A total of 369 Charles River Laboratories shares were withheld to cover tax obligations, consisting of 305 shares on May 30, 2026 and 64 shares on May 31, 2026, both classified as tax-withholding dispositions in the filing.