UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): November 1, 2012 (October 30, 2012)

JOHN B. SANFILIPPO & SON, INC.

(Exact name of Registrant as specified in its charter)

1703 North Randall Road, Elgin, Illinois 60123-7820

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (847) 289-1800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On October 30, 2012, the Board of Directors of John B. Sanfilippo & Son, Inc. (the “Registrant”) approved and adopted an amendment to the Registrant’s Code of Conduct (as amended, the “Code”). The Code was amended to cross reference the Registrant’s recently adopted Anticorruption Policy.

The approval and adoption of the amendment did not result in any waiver, explicit or implicit, of any provision of the Code. The Code does not replace, but is in addition to, the Registrant’s separate Code of Ethics.

The foregoing summary of the amendment and the Code is subject to, and qualified in its entirety by, reference to the full text of the Code (a fully amended and restated copy of which is attached hereto as Exhibit 14.1 and incorporated herein by reference). The Code has been posted on the “Investor Relations” section of our website at www.jbssinc.com.

(i) The following directors were elected at the meeting and the voting for each director was as follows (with Common Stock and Class A Common Stock stockholders voting separately):

(ii) The Audit Committee’s appointment of PricewaterhouseCoopers LLP as the Registrant’s independent registered public accounting firm for the 2013 fiscal year was ratified by the following vote (with Common Stock and Class A Common Stock stockholders voting together):

(iii) The advisory vote on executive compensation was approved by the following vote (with Common Stock and Class A Common Stock stockholders voting together):

The exhibit furnished herewith is listed in the Exhibit Index which follows the signature page of this Current Report on Form 8-K.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX