Charles River director Foster sells 24,042 shares

The reported sale was made under a Rule 10b5-1 Trading Plan adopted on March 6, 2026.

Rhea-AI Filing Summary

James C. Foster, a director of Charles River Laboratories International, Inc. (CRL), exercised stock options to acquire 24,042 common shares on October 22, 2026, at an exercise price of $244.41 per share, then sold 24,042 shares at $350 per share. The sale was reported under a Rule 10b5-1 Trading Plan initially adopted March 6, 2026. As of October 22, 2026, his indirect holdings included 5,423 shares in the 2024 GRAT, 10,780 in the 2025 GRAT, 20,000 in the 2026 GRAT, 10,000 in a trust held by his spouse, and 155,611 held by trust.

Insider Trade Summary 10b5-1

Exercise and Sale: 24,042 shares ($2.54M approx. pre-tax spread)

Exercise and Sale 8 txns

Insider FOSTER JAMES C

Role Director

Sold 24,042 shs ($8.41M)

Approx. gross sale proceeds $8.41M

Approx. exercise cost $5.88M

Approx. pre-tax spread $2.54M

Type	Security	Shares	Price	Value
Exercise	Stock Options (Right to Buy)	24,042	$0.00	$0.00
Exercise	Common Stock	24,042	$244.41	$5.88M
Sale	Common Stock F1	24,042	$350.00	$8.41M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Options (Right to Buy) — 0 contracts (Direct); Common Stock — 31,596 shares (Direct); Common Stock — 5,423 shares (Indirect, 2024 GRAT); Common Stock — 10,780 shares (Indirect, 2025 GRAT); Common Stock — 20,000 shares (Indirect, 2026 GRAT); Common Stock — 10,000 shares (Indirect, By Trust Held By Spouse); Common Stock — 155,611 shares (Indirect, By Trust)

Footnotes (1)

1. F1. This exercise and sale occurred pursuant to a Rule 10b5-1 Trading Plan that was initially adopted on March 6, 2026.

Key Figures

Options exercised: 24,042 shares Exercise price: $244.41 per share Shares sold: 24,042 shares +4 more

7 metrics

Options exercised 24,042 shares October 22, 2026

Exercise price $244.41 per share Options exercised on October 22, 2026

Shares sold 24,042 shares October 22, 2026

Sale price $350 per share Sale on October 22, 2026

Indirect trust-held common stock 155,611 shares Listed as held by trust on October 22, 2026

Indirect 2026 GRAT common stock 20,000 shares Listed on October 22, 2026

Indirect spouse-held trust common stock 10,000 shares Listed on October 22, 2026

Key Terms

Rule 10b5-1 Trading Plan, Stock Options (Right to Buy), GRAT

3 terms

Rule 10b5-1 Trading Plan regulatory

"pursuant to a Rule 10b5-1 Trading Plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Stock Options (Right to Buy) financial

"Stock Options (Right to Buy)"

GRAT financial

"2024 GRAT"

FAQ

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

How many CRL shares did James C. Foster exercise and sell?

James C. Foster exercised options to acquire 24,042 CRL common shares at $244.41 per share and sold 24,042 shares at $350 per share on October 22, 2026. The sale was pursuant to a Rule 10b5-1 Trading Plan initially adopted March 6, 2026.

What indirect CRL share holdings did James C. Foster report?

The reported indirect holdings were 5,423 shares in the 2024 GRAT, 10,780 in the 2025 GRAT, 20,000 in the 2026 GRAT, 10,000 in a trust held by his spouse, and 155,611 held by trust, as of October 22, 2026.

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

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Available on EDGAR 10/26/2026 - 04:51 PM EDT Accepted by SEC EDGAR 10/26/2026 - 04:51 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).

X

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)
10/22/2026

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	10/22/2026		M		24,042	A	$244.41	55,638	D
Common Stock	10/22/2026		S		24,042(1)	D	$350	31,596	D
Common Stock								5,423	I	2024 GRAT
Common Stock								10,780	I	2025 GRAT
Common Stock								20,000	I	2026 GRAT
Common Stock								10,000	I	By Trust Held By Spouse
Common Stock								155,611	I	By Trust

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
Stock Options (Right to Buy)	$244.41	10/22/2026		M			24,042	05/27/2023	05/27/2032	Common Stock	24,042	$0	0	D

Explanation of Responses:

1. This exercise and sale occurred pursuant to a Rule 10b5-1 Trading Plan that was initially adopted on March 6, 2026.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Kerry Dailey as attorney-in-fact for James C. Foster	10/23/2026
	** 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)