Sec Form 4 Filing - GILLETT NANCY @ CHARLES RIVER LABORATORIES INTERNATIONAL INC - 2013-03-08

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person GILLETT NANCY 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) Corporate Executive VP (Last) (First) (Middle) 251 BALLARDVALE STREET 3. Date of Earliest Transaction (MM/DD/YY) 03/08/2013 (Street) WILMINGTON, MA01887 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 03/08/2013 M 21,637 A $ 37.92 76,147 D Common Stock 03/08/2013 M 15,400 A $ 38.03 91,547 D Common Stock 03/08/2013 S 400 D $ 42.605 91,147 D Common Stock 03/08/2013 S 1,300 D $ 42.61 89,847 D Common Stock 03/08/2013 S 600 D $ 42.615 89,247 D Common Stock 03/08/2013 S 600 D $ 42.62 88,647 D Common Stock 03/08/2013 S 300 D $ 42.625 88,347 D Common Stock 03/08/2013 S 100 D $ 42.629 88,247 D Common Stock 03/08/2013 S 900 D $ 42.63 87,347 D Common Stock 03/08/2013 S 700 D $ 42.635 86,647 D Common Stock 03/08/2013 S 300 D $ 42.639 86,347 D Common Stock 03/08/2013 S 1,900 D $ 42.64 84,447 D Common Stock 03/08/2013 S 900 D $ 42.645 83,547 D Common Stock 03/08/2013 S 7,000 D $ 42.65 76,547 D Common Stock 03/08/2013 S 500 D $ 42.655 76,047 D Common Stock 03/08/2013 S 200 D $ 42.659 75,847 D Common Stock 03/08/2013 S 3,623 D $ 42.66 72,224 D Common Stock 03/08/2013 S 2,300 D $ 42.665 69,924 D Common Stock 03/08/2013 S 100 D $ 42.669 69,824 D Common Stock 03/08/2013 S 4,183 D $ 42.67 65,641 D Common Stock 03/08/2013 S 400 D $ 42.675 65,241 D Common Stock 03/08/2013 S 918 D $ 42.68 64,323 D Common Stock 03/08/2013 S 700 D $ 42.685 63,623 D Common Stock 03/08/2013 S 1,200 D $ 42.69 62,423 D Common Stock 03/08/2013 S 100 D $ 42.695 62,323 D Common Stock 03/08/2013 S 4,313 D $ 42.7 58,010 D Common Stock 03/08/2013 S 200 D $ 42.705 57,810 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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) $ 37.92 03/08/2013 M 21,637 02/26/2011 02/26/2017 Common Stock 21,637 $ 0 0 D Stock Options (Right to Buy) $ 38.03 03/08/2013 M 15,400 08/11/2007 08/11/2013 Common Stock 15,400 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other GILLETT NANCY 251 BALLARDVALE STREET WILMINGTON, MA01887 Corporate Executive VP Signatures /s/Matthew Daniel as attorney-in-fact for Nancy Gillett 03/12/2013 Signature of Reporting Person Date

Explanation of Responses:
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).

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