Charles River officer Parisotto sells 2,156 shares

The exercise and sale were made under a Rule 10b5-1 Trading Plan initially adopted March 4, 2026, and 719 stock options remained after the transaction.

Rhea-AI Filing Summary

Charles River Laboratories International, Inc. officer Shannon M. Parisotto, CEVP, Disc & Safety Assessment, exercised 2,156 stock options at an exercise price of $244.41 per share on October 21, 2026, acquiring 2,156 common shares and selling those shares at $344.41 per share.

The exercise and sale occurred pursuant to a Rule 10b5-1 Trading Plan initially adopted on March 4, 2026. The reported position after the exercise included 719 stock options; separate indirect holding entries list 28,510 shares held by Karpathos Investments LLC and 9,680 shares held by a trust.

Insider Trade Summary 10b5-1

Exercise and Sale: 2,156 shares ($216K approx. pre-tax spread)

Exercise and Sale 5 txns

Insider Parisotto Shannon M

Role CEVP, Disc & Safety Assessment

Sold 2,156 shs ($743K)

Approx. gross sale proceeds $743K

Approx. exercise cost $527K

Approx. pre-tax spread $216K

Type	Security	Shares	Price	Value
Exercise	Stock Options (Right to Buy)	2,156	$0.00	$0.00
Exercise	Common Stock	2,156	$244.41	$527K
Sale	Common Stock F1	2,156	$344.41	$743K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Options (Right to Buy) — 719 contracts (Direct); Common Stock — 4,807 shares (Direct); Common Stock — 28,510 shares (Indirect, by Karpathos Investments LLC); Common Stock — 9,680 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 4, 2026.

Key Figures

Stock options exercised: 2,156 options Exercise price: $244.41 per share Common shares acquired: 2,156 shares +5 more

8 metrics

Stock options exercised 2,156 options October 21, 2026

Exercise price $244.41 per share Options exercised October 21, 2026

Common shares acquired 2,156 shares Through the option exercise on October 21, 2026

Common shares sold 2,156 shares October 21, 2026

Sale price $344.41 per share Sale on October 21, 2026

Stock options following exercise 719 options Reported after the October 21, 2026 transaction

Indirect shares held by Karpathos Investments LLC 28,510 shares Reported holding

Indirect shares held by a trust 9,680 shares Reported holding

Key Terms

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

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)"

exercise price financial

"exercise price of $244.41"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

FAQ

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

How many CRL shares did Shannon M. Parisotto sell?

Shannon M. Parisotto sold 2,156 common shares at $344.41 per share on October 21, 2026. The sale followed exercise of 2,156 stock options at $244.41 per share; both transactions occurred under a Rule 10b5-1 Trading Plan initially adopted March 4, 2026.

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

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Available on EDGAR 10/23/2026 - 06:46 PM EDT Accepted by SEC EDGAR 10/23/2026 - 06:45 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^*

Parisotto Shannon M

(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)
	CEVP, Disc & Safety Assessment

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/21/2026

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	10/21/2026		M		2,156	A	$244.41	6,963	D
Common Stock	10/21/2026		S		2,156(1)	D	$344.41	4,807	D
Common Stock								28,510	I	by Karpathos Investments LLC
Common Stock								9,680	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	10/21/2026		M			2,156	05/27/2023	05/27/2032	Common Stock	2,156	$0	719	D

Explanation of Responses:

1. This exercise and sale occurred pursuant to a Rule 10b5-1 Trading Plan that was initially adopted on March 4, 2026.

	/s/ Kerry Dailey as attorney-in-fact for Shannon Parisotto	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)