QuickLinks -- Click here to rapidly navigate through this document



FORM 6-K
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934
For the month of March 2008


CELESTICA INC.
(Translation of registrant's name into English)


12 Concorde Place, 5th Floor
Toronto, Ontario
Canada, M3C 3R8
(416) 448-5800
(Address of principal executive offices)

        Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ý                        Form 40-F o

        Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes o                        No ý

        If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-                             





Celestica Inc.
Form 6-K
Month of March 2008

The following information filed with this Form 6-K shall not be deemed to be incorporated by reference into any of Celestica's registration statements on Forms S-8 (Nos. 333-9500, 333-9822, 333-9780, 333-71126, 333-66276, 333-63112, 333-88210, 333-113591) and on Forms F-3 (Nos. 333-12272, 333-50240, 333-69278 and 333-113728), or the prospectuses included therein, or any registration statement subsequently filed by Celestica with the Securities and Exchange Commission, except as provided for herein or as shall be expressly set forth by specific reference in such filing:


99.1     Notice of the Annual Meeting of Shareholders and Management Information Circular and Proxy Statement
99.2     Multiple Voting Shares Proxy
99.3     Subordinate Voting Shares Proxy
99.4     Request Card to beneficial holders
99.5     Letter from Computershare
99.6     Letter to Shareholders
99.7     Press Release, dated March 25, 2008


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, thereunto duly authorized.

    CELESTICA INC.
         

Date: March 25, 2008

 

By:

 

/s/  
ELIZABETH L. DELBIANCO      
Name: Elizabeth L. DelBianco
Title: Chief Legal Officer


EXHIBIT INDEX

99.1     Notice of Annual and Special Meeting of Shareholders and Management Information Circular and Proxy Statement
99.2     Multiple Voting Shares Proxy
99.3     Subordinate Voting Shares Proxy
99.4     Request Card to beneficial holders
99.5     Letter from Computershare
99.6     Letter to Shareholders
99.7     Press Release, dated March 25, 2008



QuickLinks

Celestica Inc. Form 6-K Month of March 2008
SIGNATURES
EXHIBIT INDEX