Charles River (CRL) EVP LaPlume reports 428-share tax-withholding disposals

Rhea-AI Filing Summary

Charles River Laboratories International EVP Joseph W. LaPlume reported routine tax-related share dispositions in company stock. On May 27, 185 shares of common stock were surrendered at $156.73 per share, and on May 26, 243 shares were surrendered at $160.30 per share.

Both transactions are coded as tax-withholding dispositions, meaning shares were delivered to cover exercise price or tax liabilities rather than sold in open-market trades. After these events, LaPlume directly holds 27,020 shares of Charles River Laboratories common stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider LaPlume Joseph W

Role EVP, Corp Strategy & Develop

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	185	$156.73	$29K
Tax Withholding	Common Stock	243	$160.30	$39K

Holdings After Transaction: Common Stock — 27,020 shares (Direct, null)

Footnotes (1)

Key Figures

Tax-withholding shares May 27: 185 shares at $156.73 Tax-withholding shares May 26: 243 shares at $160.30 Total tax-withholding shares: 428 shares +2 more

5 metrics

Tax-withholding shares May 27 185 shares at $156.73 Common Stock tax-withholding disposition on May 27, 2026

Tax-withholding shares May 26 243 shares at $160.30 Common Stock tax-withholding disposition on May 26, 2026

Total tax-withholding shares 428 shares Aggregate tax-withholding dispositions in this Form 4

Shares held after transactions 27,020 shares Direct ownership following May 27, 2026 disposition

Transaction code Code F Payment of exercise price or tax liability by delivering securities

Key Terms

tax-withholding disposition, Common Stock, Form 4, Payment of exercise price or tax liability by delivering securities

4 terms

tax-withholding disposition financial

"Both transactions are coded as tax-withholding dispositions, meaning shares were delivered to cover exercise price or tax liabilities"

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.

Common Stock financial

"185 shares of common stock were surrendered at $156.73 per share"

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.

Form 4 regulatory

"Joseph W. LaPlume reported two tax-withholding dispositions of Charles River common stock in this Form 4"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Payment of exercise price or tax liability by delivering securities financial

"Both transactions are described as Payment of exercise price or tax liability by delivering securities"

Form 4 Insider Transactions: What Each Field Means →

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^*

LaPlume Joseph W

(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)
	EVP, Corp Strategy & Develop

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/26/2026

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	05/26/2026		F		243	D	$160.3	27,205	D
Common Stock	05/27/2026		F		185	D	$156.73	27,020	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:

	/s/ Joseph W. LaPlume	05/28/2026
	** 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)

FAQ

What did Charles River (CRL) executive Joseph LaPlume report in this Form 4?

Joseph W. LaPlume reported two tax-withholding dispositions of Charles River common stock. These transactions satisfied tax or exercise obligations by surrendering shares, not through open-market sales, and are considered routine compensation-related events rather than directional buying or selling.

How many Charles River (CRL) shares were disposed of for tax withholding?

LaPlume surrendered a total of 428 shares of Charles River common stock for tax withholding. This consisted of 185 shares on May 27 and 243 shares on May 26, all coded as payment of exercise price or tax liability by delivering securities.

At what prices were the CRL tax-withholding shares valued in LaPlume’s Form 4?

The surrendered shares were valued at $156.73 per share on May 27 and $160.30 per share on May 26. These values reflect the prices used to determine how many shares were required to satisfy tax or exercise obligations in each transaction.

How many Charles River (CRL) shares does Joseph LaPlume hold after these transactions?

Following the May 27 tax-withholding disposition, LaPlume directly holds 27,020 shares of Charles River common stock. This post-transaction holding figure comes directly from the Form 4 and shows his remaining equity position after the routine tax-related share surrenders.

Do LaPlume’s reported CRL transactions represent open-market sales or purchases?

No. Both transactions are coded “F”, described as payment of exercise price or tax liability by delivering securities. This means shares were withheld or surrendered for tax or exercise obligations, not bought or sold in discretionary open-market trades on an exchange.