CRL director logs tax withholding, updates share holdings

Charles River Laboratories International director James C. Foster reported a set of equity holdings and one tax-related share disposition in company common stock.

Rhea-AI Filing Summary

Charles River Laboratories International director James C. Foster reported a set of equity holdings and one tax-related share disposition in company common stock. The filing shows 1,596 shares of common stock were disposed of at $180.71 per share as a tax-withholding disposition, meaning shares were delivered to cover tax obligations rather than sold in the open market.

After this transaction, Foster directly holds 279,957 shares of common stock. The filing also lists several indirect holdings, including shares held by a spouse, by trusts, and by 2024 and 2025 GRAT vehicles. Overall, the activity appears routine and primarily administrative, focused on updating ownership records and satisfying tax requirements tied to equity compensation.

Insights

Equity compensation analyst

Filing shows routine tax withholding and updated indirect holdings.

The Form 4 for Charles River Laboratories International director James C. Foster primarily reflects equity compensation mechanics. A total of 1,596 shares of common stock were disposed of at $180.71 per share as a tax-withholding disposition, used to satisfy tax liabilities.

This F-code transaction is not an open-market sale and carries limited signaling value about Foster’s view of the stock. Following the disposition, he directly holds 279,957 shares, while additional indirect positions are held by a spouse, trusts, and 2024/2025 GRAT entities, indicating a substantial remaining equity stake.

The filing does not show open-market buying or selling; instead it updates ownership across multiple indirect vehicles and documents tax settlement in shares. Subsequent company filings may provide further context on future equity grants or vesting schedules that give rise to similar tax-withholding events.

Insider Trade Summary

Exercise Price or Tax Liability: 1,596 shares

Exercise Price or Tax Liability 7 txns

Insider FOSTER JAMES C

Role Director

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	1,596	$180.71	$288K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 279,957 shares (Direct); Common Stock — 5,423 shares (Indirect, 2024 GRAT); Common Stock — 10,780 shares (Indirect, 2025 GRAT); Common Stock — 3,230 shares (Indirect, by Trust); Common Stock — 10,000 shares (Indirect, Held By Spouse)

Key Figures

Tax-withholding shares: 1,596 shares Tax-withholding price: $180.71 per share Direct holdings after transaction: 279,957 shares +4 more

7 metrics

Tax-withholding shares 1,596 shares Common Stock disposed to cover tax liability

Tax-withholding price $180.71 per share Value assigned to 1,596-share tax-withholding disposition

Direct holdings after transaction 279,957 shares Common Stock directly held by James C. Foster following Form 4 event

Spouse-held shares 10,000 shares Common Stock held indirectly by spouse as reported

Trust-held shares 2,250 shares One reported trust’s indirect holdings of Common Stock

2025 GRAT holdings 10,780 shares Common Stock indirectly held via 2025 GRAT

2024 GRAT holdings 5,423 shares Common Stock indirectly held via 2024 GRAT

Key Terms

tax-withholding disposition, Form 4, indirect holdings, GRAT, +1 more

5 terms

tax-withholding disposition financial

"1,596 shares were disposed of at $180.71 per share as a 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.

Form 4 regulatory

"The Form 4 for Charles River Laboratories International director James C. Foster"

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.

indirect holdings financial

"The filing also lists several indirect holdings, including shares held by a spouse, trusts, and GRAT vehicles"

GRAT financial

"indirect positions are held by a spouse, trusts, and 2024 and 2025 GRAT entities"

beneficial ownership financial

"illustrating how his beneficial interest is spread across several related entities"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

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

What did James C. Foster report in this Form 4 for CRL?

James C. Foster reported updated holdings of Charles River Laboratories common stock and a tax-withholding disposition of 1,596 shares. The filing clarifies his direct and indirect ownership after satisfying tax obligations linked to equity compensation.

How many Charles River Laboratories shares were used for tax withholding?

The filing shows 1,596 shares of Charles River Laboratories common stock were disposed of at $180.71 per share. These shares were delivered to cover tax liabilities, not sold in an open market transaction, under a tax-withholding disposition code F.

How many CRL shares does James C. Foster hold directly after this filing?

After the tax-withholding event, James C. Foster directly holds 279,957 shares of Charles River Laboratories common stock. This direct position is separate from additional indirect holdings through a spouse, various trusts, and GRAT vehicles disclosed in the same Form 4.

What indirect CRL share holdings are reported for James C. Foster?

The filing lists indirect ownership of Charles River Laboratories common stock held by Foster’s spouse, by trusts, and in 2024 and 2025 GRAT entities. Each vehicle reports its own share balance, illustrating how his beneficial interest is spread across several related entities.

Does this CRL Form 4 show open-market buying or selling by James C. Foster?

The Form 4 does not report open-market purchases or sales. It records a tax-withholding disposition of 1,596 shares and several holding entries. These entries update direct and indirect ownership records rather than signaling new market-driven trading activity in CRL shares.

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

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Accepted by SEC EDGAR 06/02/2026 - 04:31 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^*

FOSTER JAMES C

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/30/2026

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	05/30/2026		F		1,596	D	$180.71	279,957	D
Common Stock								5,423	I	2024 GRAT
Common Stock								10,780	I	2025 GRAT
Common Stock								230	I	by Trust
Common Stock								750	I	By Trust
Common Stock								2,250	I	By Trust
Common Stock								10,000	I	Held By Spouse

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/ James C. Foster	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)